Model Driven Telemetry

About Telemetry

Collecting data for analyzing and troubleshooting has always been an important aspect in monitoring the health of a network.

Cisco NX-OS provides several mechanisms such as SNMP, CLI, and Syslog to collect data from a network. These mechanisms have limitations that restrict automation and scale. One limitation is the use of the pull model, where the initial request for data from network elements originates from the client. The pull model does not scale when there is more than one network management station (NMS) in the network. With this model, the server sends data only when clients request it. To initiate such requests, continual manual intervention is required. This continual manual intervention makes the pull model inefficient.

A push model continuously streams data out of the network and notifies the client. Telemetry enables the push model, which provides near-real-time access to monitoring data.

Telemetry Components and Process

Telemetry consists of four key elements:

  • Data Collection — Telemetry data is collected from the Data Management Engine (DME) database in branches of the object model specified using distinguished name (DN) paths. The data can be retrieved periodically (frequency-based) or only when a change occurs in any object on a specified path (event-based). You can use the NX-API to collect frequency-based data.

  • Data Encoding — The telemetry encoder encapsulates the collected data into the desired format for transporting.

    NX-OS encodes telemetry data in the Google Protocol Buffers (GPB) and JSON format.

  • Data Transport — NX-OS transports telemetry data using HTTP for JSON encoding and the Google remote procedure call (gRPC) protocol for GPB encoding. The gRPC receiver supports message sizes greater than 4 MB. (Telemetry data using HTTPS is also supported if a certificate is configured.)

    Use the following command to configure the UDP transport to stream data using a datagram socket either in JSON or GPB:
    
destination-group num
  ip address xxx.xxx.xxx.xxx port xxxx protocol UDP encoding {JSON | GPB }
    The UDP telemetry is with the following header:
    
typedef enum tm_encode_ {
  TM_ENCODE_DUMMY, 
  TM_ENCODE_GPB, 
  TM_ENCODE_JSON, 
  TM_ENCODE_XML, 
  TM_ENCODE_MAX, 
} tm_encode_type_t; 

typedef struct tm_pak_hdr_ { 
  uint8_t version; /* 1 */ 
  uint8_t encoding; 
  uint16_t msg_size; 
  uint8_t secure; 
  uint8_t padding; 
}__attribute__ ((packed, aligned (1))) tm_pak_hdr_t;

    Use the first 6 bytes in the payload to process telemetry data using UDP, using one of the following methods:

    • Read the information in the header to determine which decoder to use to decode the data, JSON or GPB, if the receiver is meant to receive different types of data from multiple endpoints.

    • Remove the header if you are expecting one decoder (JSON or GPB) but not the other.

  • Telemetry Receiver — A telemetry receiver is a remote management system or application that stores the telemetry data.

The GPB encoder stores data in a generic key-value format. The encoder requires metadata in the form of a compiled .proto file to translate the data into GPB format.

In order to receive and decode the data stream correctly, the receiver requires the .proto file that describes the encoding and the transport services. The encoding decodes the binary stream into a key value string pair.

A telemetry .proto file that describes the GPB encoding and gRPC transport is available on Cisco's GitLab: https://github.com/CiscoDevNet/nx-telemetry-proto

High Availability of the Telemetry Process

High availability of the telemetry process is supported with the following behaviors:

  • System Reload — During a system reload, any telemetry configuration and streaming services are restored.

  • Supervisor Failover — Although telemetry is not on hot standby, telemetry configuration and streaming services are restored when the new active supervisor is running.

  • Process Restart — If the telemetry process freezes or restarts for any reason, configuration, and streaming services are restored when telemetry is restarted.

Licensing Requirements for Telemetry

Product

License Requirement

Cisco NX-OS

Telemetry requires no license. Any feature not included in a license package is bundled with the Cisco NX-OS image and is provided at no extra charge to you. For a complete explanation of the Cisco NX-OS licensing scheme, see the Cisco NX-OS Licensing Guide.

Installing and Upgrading Telemetry

Installing the Application

The telemetry application is packaged as a feature RPM and included with the NX-OS release. The RPM is installed by default as part of the image bootup. After installation, you can start the application using the feature telemetry command. The RPM file is located in the /rpms directory and is named as follows:

As in the following example:

Installing Incremental Updates and Fixes

Copy the RPM to the device bootflash and use the following commands from the bash prompt: 

feature bash
run bash sudo su

Then copy the RPM to the device bootflash. Use the following commands from the bash prompt: 

yum upgrade telemetry_new_version.rpm

The application is upgraded and the change appears when the application is started again.

Downgrading to a Previous Version

To downgrade the telemetry application to a previous version, use the following command from the bash prompt:
    yum downgrade telemetry

Verifying the Active Version

To verify the active version, run the following command from the switch exec prompt: 

show install active

Note
The show install active command will only show the active installed RPM after an upgrade has occurred. The default RPM that comes bundled with the NX-OS will not be displayed.

Guidelines and Limitations for Model Driven Telemetry

Telemetry has the following configuration guidelines and limitations:

  • Cisco NX-OS releases that support the data management engine (DME) Native Model support Telemetry.

  • Support is in place for the following:

    • DME data collection

    • NX-API data sources

    • Google protocol buffer (GPB) encoding over Google Remote Procedure Call (gRPC) transport

    • JSON encoding over HTTP

  • The smallest sending interval (cadence) supported is five seconds for a depth of 0. The minimum cadence values for depth values greater than 0 depends on the size of the data being streamed out. Configuring any cadences below the minimum value may result in undesirable system behavior.

  • Telemetry supports up to five remote management receivers (destinations). Configuring more than five remote receivers may result in undesirable system behavior.

  • Telemetry can consume up to 20% of the CPU resource.

Configuration Commands After Downgrading to an Older Release

After a downgrade to an older release, some configuration commands or command options can fail because the older release may not support them. When downgrading to an older release, unconfigure and reconfigure the telemetry feature after the new image comes up. This sequence avoids the failure of unsupported commands or command options.

The following example shows this procedure:

  • Copy the telemetry configuration to a file: 
    
switch# show running-config | section telemetry
feature telemetry
telemetry
  destination-group 100
    ip address 1.2.3.4 port 50004 protocol gRPC encoding GPB 
    use-chunking size 4096
  sensor-group 100
    path sys/bgp/inst/dom-default depth 0
  subscription 600
    dst-grp 100
    snsr-grp 100 sample-interval 7000
switch# show running-config | section telemetry > telemetry_running_config
switch# show file bootflash:telemetry_running_config
feature telemetry
telemetry
  destination-group 100
    ip address 1.2.3.4 port 50004 protocol gRPC encoding GPB 
    use-chunking size 4096
  sensor-group 100
    path sys/bgp/inst/dom-default depth 0
  subscription 600
    dst-grp 100
    snsr-grp 100 sample-interval 7000
switch#
  • Execute the downgrade operation. When the image comes up and the switch is ready, copy the telemetry configurations back to the switch. 
    
switch# copy telemetry_running_config running-config echo-commands 
`switch# config terminal`
`switch(config)# feature telemetry`
`switch(config)# telemetry`
`switch(config-telemetry)# destination-group 100`
`switch(conf-tm-dest)# ip address 1.2.3.4 port 50004 protocol gRPC encoding GPB `
`switch(conf-tm-dest)# sensor-group 100`
`switch(conf-tm-sensor)# path sys/bgp/inst/dom-default depth 0`
`switch(conf-tm-sensor)# subscription 600`
`switch(conf-tm-sub)# dst-grp 100`
`switch(conf-tm-sub)# snsr-grp 100 sample-interval 7000`
`switch(conf-tm-sub)# end`
Copy complete, now saving to disk (please wait)...
Copy complete.
switch#

gRPC Error Behavior

The switch client disables the connection to the gRPC receiver if the gRPC receiver sends 20 errors. Unconfigure then reconfigure the receiver's IP address under the destination group to enable the gRPC receiver. Errors include:

  • The gRPC client sends the wrong certificate for secure connections.

  • The gRPC receiver takes too long to handle client messages and incurs a timeout. Avoid timeouts by processing messages using a separate message processing thread.

NX-API Sensor Path Limitations

NX-API can collect and stream switch information not yet in the DME using show commands. However, using the NX-API instead of streaming data from the DME has inherent scale limitations as outlined:

  • The switch backend dynamically processes NX-API calls such as show commands,

  • NX-API spawns several processes that can consume up to a maximum of 20% of the CPU.

  • NX-API data translates from the CLI to XML to JSON.

The following is a suggested user flow to help limit excessive NX-API sensor path bandwidth consumption:

  1. Check whether the show command has NX-API support. You can confirm whether NX-API supports the command from the VSH with the pipe option: show <command> | json or show <command> | json pretty.


    Note
    Avoid commands that take the switch more than 30 seconds to return JSON output.

  2. Refine the show command to include any filters or options.

    • Avoid enumerating the same command for individual outputs; for example, show vlan id 100 , show vlan id 101 , and so on. Instead, use the CLI range options; for example, show vlan id 100-110,204 , whenever possible to improve performance.

      If only the summary or counter is needed, then avoid dumping a whole show command output to limit the bandwidth and data storage that is required for data collection.

  3. Configure telemetry with sensor groups that use NX-API as their data sources. Add the show commands as sensor paths

  4. Configure telemetry with a cadence of five times the processing time of the respective show command to limit CPI usage.

  5. Receive and process the streamed NX-API output as part of the existing DME collection.

Telemetry VRF Support

Telemetry VRF support allows you to specify a transport VRF, which means that the telemetry data stream can egress through front-panel ports and avoid possible competition between SSH or NGINX control sessions.

You can use the use-vrf vrf-name command to specify the transport VRF.

The following example specifies the transport VRF:

The following is an example of use-vrf as a POST payload: 

{
              "telemetryDestProfile": {
                "attributes": {
                  "adminSt": "enabled"
                },
                "children": [
                  {
                    "telemetryDestOptVrf": {
                      "attributes": {
                        "name": "default"
                      }
                    }
                  }
                ]
              }
            }

Support for Node ID

Beginning in NX-OS release 9.3.1, you can configure a custom Node ID string for a telemetry receiver through the use-nodeid command. By default, the hostname is used, but support for a node ID enables you to set or change the identifier for the node_id_str of the telemetry receiver data.

You can assign the node ID through the telemetry destination profile, by using the usenode-id command. This command is optional.

The following example shows configuring the node ID.
switch-1(config)# telemetry
switch-1(config-telemetry)# destination-profile
switch-1(conf-tm-dest-profile)# use-nodeid test-srvr-10
switch-1(conf-tm-dest-profile)#
The following example shows a telemetry notification on the receiver after the node ID is configured. 
Telemetry receiver:
==================================
node_id_str: "test-srvr-10"
subscription_id_str: "1"
encoding_path: "sys/ch/psuslot-1/psu"
collection_id: 3896
msg_timestamp: 1559669946501

Configuring Telemetry Using the CLI

Configuring Telemetry Using the NX-OS CLI

The following steps enable streaming telemetry and configuring the source and destination of the data stream.

SUMMARY STEPS

  1. configure terminal
  2. feature telemetry
  3. feature nxapi
  4. nxapi use-vrf management
  5. telemetry
  6. (Optional) certificate certificate_path host_URL
  7. sensor-group sgrp_id
  8. path sensor_path depth 0 [filter-condition filter] [alias path_alias]
  9. destination-group dgrp_id
  10. (Optional) ip address ip_address port port protocol procedural-protocol encoding encoding-protocol
  11. ip_version address ip_address port portnum
  12. subscription sub_id
  13. snsr-grp sgrp_id sample-interval interval
  14. dst-grp dgrp_id

DETAILED STEPS

  Command or Action Purpose

Step 1

configure terminal

Example:

switch# configure terminal
switch(config)#

Enter the global configuration mode.

Step 2

feature telemetry

Enable the streaming telemetry feature.

Step 3

feature nxapi

Enable NX-API.

Step 4

nxapi use-vrf management

Enable the VRF management to be used for NX-API communication.

Step 5

telemetry

Example:

switch(config)# telemetry
switch(config-telemetry)#

Enter configuration mode for streaming telemetry.

Step 6

(Optional) certificate certificate_path host_URL

Example:

switch(config-telemetry)# certificate /bootflash/server.key localhost
 (Optional)

Use an existing SSL/TLS certificate.

Step 7

sensor-group sgrp_id

Example:

switch(config-telemetry)# sensor-group 100
switch(conf-tm-sensor)#

Create a sensor group with ID srgp_id and enter sensor group configuration mode.

Currently only numeric ID values are supported. The sensor group defines nodes that will be monitored for telemetry reporting.

Step 8

path sensor_path depth 0 [filter-condition filter] [alias path_alias]

Example:

  • The following command is applicable for DME, not for NX-API:
    switch(conf-tm-sensor)# path sys/bd/bd-[vlan-100] depth 0 
filter-condition eq(l2BD.operSt, "down")

    Use the following syntax for state-based filtering to trigger only when operSt changes from up to down, with no notifications of when the MO changes. 

    switch(conf-tm-sensor)# path sys/bd/bd-[vlan-100] depth 0 
filter-condition and(updated(l2BD.operSt),eq(l2BD.operSt,"down"))
  • The following command is applicable for NX-API, not for DME:
    switch(conf-tm-sensor)# path "show interface" depth 0

Add a sensor path to the sensor group.

  • The depth setting specifies the retrieval level for the sensor path. Depth settings of 0 - 32 , unbounded are supported.

    Note

     

    depth 0 is the default depth.

    NX-API-based sensor paths can only use depth 0 .

    If a path is subscribed for the event collection, the depth only supports 0 and unbounded. Other values would be treated as 0.

  • The optional filter-condition parameter can be specified to create a specific filter for event-based subscriptions.

    For state-based filtering, the filter returns both when a state has changed and when an event has occurred during the specified state. That is, a filter condition for the DN sys/bd/bd-[vlan] of eq(l2Bd.operSt, "down") triggers when the operSt changes, and when the DN's property changes while the operSt remains down , such as a no shutdown command is issued while the VLAN is operationally down .

Step 9

destination-group dgrp_id

Example:

switch(conf-tm-sensor)# destination-group 100
switch(conf-tm-dest)#

Create a destination group and enter destination group configuration mode.

Currently dgrp_id only supports numeric ID values.

Step 10

(Optional) ip address ip_address port port protocol procedural-protocol encoding encoding-protocol

Example:

switch(conf-tm-sensor)# ip address 171.70.55.69 port 50001 protocol gRPC encoding GPB
switch(conf-tm-sensor)# ip address 171.70.55.69 port 50007 protocol HTTP encoding JSON
(Optional)

Specify an IPv4 IP address and port to receive encoded telemetry data.

Note

 

gRPC is the default transport protocol.

GPB is the default encoding.

Step 11

ip_version address ip_address port portnum

Example:

  • For IPv4:
    switch(conf-tm-dest)# ip address 1.2.3.4 port 50003

Create a destination profile for the outgoing data.

When the destination group is linked to a subscription, telemetry data is sent to the IP address and port that is specified by this profile.

Step 12

subscription sub_id

Example:

switch(conf-tm-dest)# subscription 100
switch(conf-tm-sub)#

Create a subscription node with ID and enter the subscription configuration mode.

Currently sub_id only supports numeric ID values.

Note

 
When subscribing to a DN, check whether the DN is supported by DME using REST to ensure that events will stream.

Step 13

snsr-grp sgrp_id sample-interval interval

Example:

switch(conf-tm-sub)# snsr-grp 100 sample-interval 15000

Link the sensor group with ID sgrp_id to this subscription and set the data sampling interval in milliseconds.

An interval value of 0 creates an event-based subscription, in which telemetry data is sent only upon changes under the specified MO. An interval value greater than 0 creates a frequency-based subscription, in which telemetry data is sent periodically at the specified interval. For example, an interval value of 15000 results in the sending of telemetry data every 15 seconds.

Step 14

dst-grp dgrp_id

Example:

switch(conf-tm-sub)# dst-grp 100

Link the destination group with ID dgrp_id to this subscription.

Configuring Cadence for YANG Paths

The cadence for YANG paths must be greater than the total streaming time. If the total streaming time and cadence are incorrectly configured, gathering telemetry data can take longer than the streaming interval. In this situation, you can see:

  • Queues that incrementally fill because telemetry data is accumulating faster than it is streaming to the receiver.

  • Stale telemetry data which is not from the current interval.

Configure the cadence to a value greater than the total streaming time.

SUMMARY STEPS

  1. show telemetry control database sensor-groups
  2. sensor group number
  3. subscription number
  4. snsr-grp number sample-interval milliseconds
  5. show system resources

DETAILED STEPS

  Command or Action Purpose

Step 1

show telemetry control database sensor-groups

Example:

switch-1# show telemetry control database sensor-groups
Sensor Group Database size = 2
----------------------------------------------------------------------------------------------------
Row ID     Sensor Group ID  Sensor Group type  Sampling interval(ms)  Linked subscriptions  SubID 
----------------------------------------------------------------------------------------------------
1          2                Timer   /YANG      5000      /Running      1                     1     
Collection Time in ms (Cur/Min/Max): 2444/2294/2460
Encoding Time in ms (Cur/Min/Max): 56/55/57
Transport Time in ms (Cur/Min/Max): 0/0/1
Streaming Time in ms (Cur/Min/Max): 2515/2356/28403
 
Collection Statistics:
  collection_id_dropped      = 0
  last_collection_id_dropped = 0
  drop_count                 = 0
 
2          1                Timer   /YANG      5000      /Running      1                     1     
Collection Time in ms (Cur/Min/Max): 144/142/1471
Encoding Time in ms (Cur/Min/Max): 0/0/1
Transport Time in ms (Cur/Min/Max): 0/0/0
Streaming Time in ms (Cur/Min/Max): 149/147/23548
 
Collection Statistics:
  collection_id_dropped      = 0
  last_collection_id_dropped = 0
  drop_count                 = 0

switch-1# 
telemetry
  destination-group 1
    ip address 192.0.2.1 port 9000 protocol HTTP encoding JSON 
  sensor-group 1
    data-source YANG
    path /Cisco-NX-OS-device:System/procsys-items depth unbounded
  sensor-group 2
    data-source YANG
    path /Cisco-NX-OS-device:System/intf-items/phys-items depth unbounded
  subscription 1
    dst-grp 1
    snsr-grp 1 sample-interval 5000
    snsr-grp 2 sample-interval 5000

Calculate the total streaming time.

The total streaming time is the sum of the individual current streaming times of each sensor group. Individual streaming times are displayed in Streaming time in ms (Cur) . In this example, total streaming time is 2.664 seconds (2515 milliseconds plus 149 milliseconds).

Compare the configured cadence to the total streaming time for the sensor group.

The cadence is displayed in sample-interval . In this example, the cadence is correctly configured because the total streaming time (2.664 seconds) is less than the cadence (5.000 seconds, which is the default).

Step 2

sensor group number

Example:

switch-1(config-telemetry)# sensor group1
If the total streaming time is not less than the cadence, enter the sensor group for which you want to set the interval.

Step 3

subscription number

Example:

switch-1(conf-tm-sensor)# subscription 100
Edit the subscription for the sensor group.

Step 4

snsr-grp number sample-interval milliseconds

Example:

switch-1(conf-tm-sub)# snsr-grp number sample-interval 5000

For the appropriate sensor group, set the sample interval to a value greater than the total streaming time.

In this example, the sample interval is set to 5.000 seconds, which is valid because it is larger than the total streaming time of 2.664 seconds.

Step 5

show system resources

Example:

switch-1# show system resources
Load average:   1 minute: 0.38   5 minutes: 0.43   15 minutes: 0.43
Processes:   555 total, 3 running
CPU states  :   24.17% user,   4.32% kernel,   71.50% idle
       CPU0 states:   0.00% user,   2.12% kernel,   97.87% idle
       CPU1 states:   86.00% user,   11.00% kernel,   3.00% idle
       CPU2 states:   8.08% user,   3.03% kernel,   88.88% idle
       CPU3 states:   0.00% user,   1.02% kernel,   98.97% idle
Memory usage:   16400084K total,   5861652K used,   10538432K free
Current memory status: OK

Check the CPU usage.

If the CPU user state shows high usage, as shown in this example, your cadence and streaming value are not configured correctly. Repeat this procedure to properly configure the cadence.

Configuration Examples for Telemetry Using the CLI

The following steps describe how to configure a single telemetry DME stream with a ten second cadence with GPB encoding.


switch# configure terminal
switch(config)# feature telemetry
switch(config)# telemetry
switch(config-telemetry)# destination-group 1
switch(config-tm-dest)# ip address 171.70.59.62 port 50051 protocol gRPC encoding GPB
switch(config-tm-dest)# exit
switch(config-telemetry)# sensor group sg1
switch(config-tm-sensor)# data-source DME
switch(config-tm-dest)# path interface depth unbounded query-condition keep-data-type
switch(config-tm-dest)# subscription 1
switch(config-tm-dest)# dst-grp 1 
switch(config-tm-dest)# snsr grp 1 sample interval 10000

This example creates a subscription that streams data for the sys/bgp root MO every 5 seconds to the destination IP 1.2.3.4 port 50003. 


switch(config)# telemetry
switch(config-telemetry)# sensor-group 100
switch(conf-tm-sensor)# path sys/bgp depth 0
switch(conf-tm-sensor)# destination-group 100
switch(conf-tm-dest)# ip address 1.2.3.4 port 50003
switch(conf-tm-dest)# subscription 100
switch(conf-tm-sub)# snsr-grp 100 sample-interval 5000
switch(conf-tm-sub)# dst-grp 100

This example creates a subscription that streams data for sys/intf every 5 seconds to destination IP 1.2.3.4 port 50003, and encrypts the stream using GPB encoding that is verified using the test.pem. 

switch(config)# telemetry
switch(config-telemetry)# certificate /bootflash/test.pem foo.test.google.fr
switch(conf-tm-telemetry)# destination-group 100
switch(conf-tm-dest)# ip address 1.2.3.4 port 50003 protocol gRPC encoding GPB
switch(config-dest)# sensor-group 100
switch(conf-tm-sensor)# path sys/bgp depth 0
switch(conf-tm-sensor)# subscription 100
switch(conf-tm-sub)# snsr-grp 100 sample-interval 5000
switch(conf-tm-sub)# dst-grp 100

This example creates a subscription that streams data for sys/cdp every 15 seconds to destination IP 1.2.3.4 port 50004. 


switch(config)# telemetry
switch(config-telemetry)# sensor-group 100
switch(conf-tm-sensor)# path sys/cdp depth 0
switch(conf-tm-sensor)# destination-group 100
switch(conf-tm-dest)# ip address 1.2.3.4 port 50004
switch(conf-tm-dest)# subscription 100
switch(conf-tm-sub)# snsr-grp 100 sample-interval 15000
switch(conf-tm-sub)# dst-grp 100

This example creates a cadence-based collection of show command data every 750 seconds. 


switch(config)# telemetry
switch(config-telemetry)# destination-group 1
switch(conf-tm-dest)# ip address 172.27.247.72 port 60001 protocol gRPC encoding GPB 
switch(conf-tm-dest)# sensor-group 1
switch(conf-tm-sensor# data-source NX-API
switch(conf-tm-sensor)# path "show system resources" depth 0
switch(conf-tm-sensor)# path "show version" depth 0 
switch(conf-tm-sensor)# path "show environment power" depth 0 
switch(conf-tm-sensor)# path "show environment fan" depth 0 
switch(conf-tm-sensor)# path "show environment temperature" depth 0 
switch(conf-tm-sensor)# path "show process cpu" depth 0 
switch(conf-tm-sensor)# path "show nve peers" depth 0 
switch(conf-tm-sensor)# path "show nve vni" depth 0 
switch(conf-tm-sensor)# path "show nve vni 4002 counters" depth 0 
switch(conf-tm-sensor)# path "show int nve 1 counters" depth 0 
switch(conf-tm-sensor)# path "show policy-map vlan" depth 0 
switch(conf-tm-sensor)# path "show ip access-list test" depth 0 
switch(conf-tm-sensor)# path "show system internal access-list resource utilization" depth 0 
switch(conf-tm-sensor)# subscription 1
switch(conf-tm-sub)# dst-grp 1
switch(conf-tm-dest)# snsr-grp 1 sample-interval 750000

This example creates an event-based subscription for sys/fm. Data is streamed to the destination only if there is a change under the sys/fm MO. 


switch(config)# telemetry
switch(config-telemetry)# sensor-group 100
switch(conf-tm-sensor)# path sys/fm depth 0
switch(conf-tm-sensor)# destination-group 100
switch(conf-tm-dest)# ip address 1.2.3.4 port 50005
switch(conf-tm-dest)# subscription 100
switch(conf-tm-sub)# snsr-grp 100 sample-interval 0
switch(conf-tm-sub)# dst-grp 100

During operation, you can change a sensor group from frequency-based to event-based, and change event-based to frequency-based by changing the sample-interval. This example changes the sensor-group from the previous example to frequency-based. After the following commands, the telemetry application will begin streaming the sys/fm data to the destination every 7 seconds. 


switch(config)# telemetry
switch(config-telemetry)# subscription 100
switch(conf-tm-sub)# snsr-grp 100 sample-interval 7000

Multiple sensor groups and destinations can be linked to a single subscription. The subscription in this example streams the data for Ethernet port 1/1 to four different destinations every 10 seconds. 


switch(config)# telemetry
switch(config-telemetry)# sensor-group 100
switch(conf-tm-sensor)# path sys/intf/phys-[eth1/1] depth 0
switch(conf-tm-sensor)# destination-group 100
switch(conf-tm-dest)# ip address 1.2.3.4 port 50004
switch(conf-tm-dest)# ip address 1.2.3.4 port 50005
switch(conf-tm-sensor)# destination-group 200
switch(conf-tm-dest)# ip address 5.6.7.8 port 50001 protocol HTTP encoding JSON
switch(conf-tm-dest)# ip address 1.4.8.2 port 60003
switch(conf-tm-dest)# subscription 100
switch(conf-tm-sub)# snsr-grp 100 sample-interval 10000
switch(conf-tm-sub)# dst-grp 100
switch(conf-tm-sub)# dst-grp 200

A sensor group can contain multiple paths, a destination group can contain multiple destination profiles, and a subscription can be linked to multiple sensor groups and destination groups, as shown in this example. 


switch(config)# telemetry
switch(config-telemetry)# sensor-group 100
switch(conf-tm-sensor)# path sys/intf/phys-[eth1/1] depth 0
switch(conf-tm-sensor)# path sys/epId-1 depth 0
switch(conf-tm-sensor)# path sys/bgp/inst/dom-default depth 0

switch(config-telemetry)# sensor-group 200
switch(conf-tm-sensor)# path sys/cdp depth 0
switch(conf-tm-sensor)# path sys/ipv4 depth 0

switch(config-telemetry)# sensor-group 300
switch(conf-tm-sensor)# path sys/fm depth 0
switch(conf-tm-sensor)# path sys/bgp depth 0

switch(conf-tm-sensor)# destination-group 100
switch(conf-tm-dest)# ip address 1.2.3.4 port 50004
switch(conf-tm-dest)# ip address 4.3.2.5 port 50005

switch(conf-tm-dest)# destination-group 200
switch(conf-tm-dest)# ip address 5.6.7.8 port 50001

switch(conf-tm-dest)# destination-group 300
switch(conf-tm-dest)# ip address 1.2.3.4 port 60003

switch(conf-tm-dest)# subscription 600
switch(conf-tm-sub)# snsr-grp 100 sample-interval 7000
switch(conf-tm-sub)# snsr-grp 200 sample-interval 20000
switch(conf-tm-sub)# dst-grp 100
switch(conf-tm-sub)# dst-grp 200

switch(conf-tm-dest)# subscription 900
switch(conf-tm-sub)# snsr-grp 200 sample-interval 7000
switch(conf-tm-sub)# snsr-grp 300 sample-interval 0
switch(conf-tm-sub)# dst-grp 100
switch(conf-tm-sub)# dst-grp 300

You can verify the telemetry configuration using the show running-config telemetry command, as shown in this example. 


switch(config)# telemetry 
switch(config-telemetry)# destination-group 100
switch(conf-tm-dest)# ip address 1.2.3.4 port 50003
switch(conf-tm-dest)# ip address 1.2.3.4 port 50004
switch(conf-tm-dest)# end
switch# show run telemetry 

!Command: show running-config telemetry
!Time: Thu Oct 13 21:10:12 2016

version 7.0(3)I5(1)
feature telemetry

telemetry
destination-group 100
ip address 1.2.3.4 port 50003 protocol gRPC encoding GPB 
ip address 1.2.3.4 port 50004 protocol gRPC encoding GPB

Displaying Telemetry Configuration and Statistics

Use the following NX-OS CLI show commands to display telemetry configuration, statistics, errors, and session information.

show telemetry yang direct-path cisco-nxos-device

This command displays YANG paths that are directly encoded to perform better than other paths. 

switch# show telemetry yang direct-path cisco-nxos-device
) Cisco-NX-OS-device:System/lldp-items
2) Cisco-NX-OS-device:System/acl-items
3) Cisco-NX-OS-device:System/mac-items
4) Cisco-NX-OS-device:System/intf-items
5) Cisco-NX-OS-device:System/procsys-items/sysload-items
6) Cisco-NX-OS-device:System/ospf-items
7) Cisco-NX-OS-device:System/procsys-items
8) Cisco-NX-OS-device:System/ipqos-items/queuing-items/policy-items/out-items
9) Cisco-NX-OS-device:System/mac-items/static-items
10) Cisco-NX-OS-device:System/ch-items
11) Cisco-NX-OS-device:System/cdp-items
12) Cisco-NX-OS-device:System/bd-items
13) Cisco-NX-OS-device:System/eps-items
14) Cisco-NX-OS-device:System/ipv6-items

show telemetry control database

This command displays the internal databases that reflect the configuration of telemetry.


switch# show telemetry control database ?
  <CR>                
  >                   Redirect it to a file
  >>                  Redirect it to a file in append mode
  destination-groups  Show destination-groups
  destinations        Show destinations
  sensor-groups       Show sensor-groups
  sensor-paths        Show sensor-paths
  subscriptions       Show subscriptions
  |                   Pipe command output to filter

switch# show telemetry control database 

Subscription Database size = 1

--------------------------------------------------------------------------------
Subscription ID      Data Collector Type 
--------------------------------------------------------------------------------
100                  DME NX-API                

Sensor Group Database size = 1

--------------------------------------------------------------------------------
Sensor Group ID  Sensor Group type  Sampling interval(ms)  Linked subscriptions 
--------------------------------------------------------------------------------
100              Timer              10000(Running)         1                    

Sensor Path Database size = 1

--------------------------------------------------------------------------------
Subscribed Query Filter  Linked Groups  Sec Groups  Retrieve level  Sensor Path 
--------------------------------------------------------------------------------
No                       1              0           Full            sys/fm      

Destination group Database size = 2

--------------------------------------------------------------------------------
Destination Group ID  Refcount  
--------------------------------------------------------------------------------
100                   1         

Destination Database size = 2

--------------------------------------------------------------------------------
Dst IP Addr     Dst Port   Encoding   Transport  Count     
--------------------------------------------------------------------------------
192.168.20.111       12345      JSON       HTTP       1
192.168.20.123	50001      GPB        gRPC       1

show telemetry control stats

This command displays the statistics about the internal databases about configuration of telemetry.


switch# show telemetry control stats 
show telemetry control stats entered

--------------------------------------------------------------------------------
Error Description                                            Error Count 
--------------------------------------------------------------------------------
Chunk allocation failures                                    0
Sensor path Database chunk creation failures                 0
Sensor Group Database chunk creation failures                0
Destination Database chunk creation failures                 0
Destination Group Database chunk creation failures           0
Subscription Database chunk creation failures                0
Sensor path Database creation failures                       0
Sensor Group Database creation failures                      0
Destination Database creation failures                       0
Destination Group Database creation failures                 0
Subscription Database creation failures                      0
Sensor path Database insert failures                         0
Sensor Group Database insert failures                        0
Destination Database insert failures                         0
Destination Group Database insert failures                   0
Subscription insert to Subscription Database failures        0
Sensor path Database delete failures                         0
Sensor Group Database delete failures                        0
Destination Database delete failures                         0
Destination Group Database delete failures                   0
Delete Subscription from Subscription Database failures      0
Sensor path delete in use                                    0
Sensor Group delete in use                                   0
Destination delete in use                                    0
Destination Group delete in use                              0
Delete destination(in use) failure count                     0
Failed to get encode callback                                0
Sensor path Sensor Group list creation failures              0
Sensor path prop list creation failures                      0
Sensor path sec Sensor path list creation failures           0
Sensor path sec Sensor Group list creation failures          0
Sensor Group Sensor path list creation failures              0
Sensor Group Sensor subs list creation failures              0
Destination Group subs list creation failures                0
Destination Group Destinations list creation failures        0
Destination Destination Groups list creation failures        0
Subscription Sensor Group list creation failures             0
Subscription Destination Groups list creation failures       0
Sensor Group Sensor path list delete failures                0
Sensor Group Subscriptions list delete failures              0
Destination Group Subscriptions list delete failures         0
Destination Group Destinations list delete failures          0
Subscription Sensor Groups list delete failures              0
Subscription Destination Groups list delete failures         0
Destination Destination Groups list delete failures          0
Failed to delete Destination from Destination Group          0
Failed to delete Destination Group from Subscription         0
Failed to delete Sensor Group from Subscription              0
Failed to delete Sensor path from Sensor Group               0
Failed to get encode callback                                0
Failed to get transport callback                             0
switch#  Destination Database size = 1

--------------------------------------------------------------------------------
Dst IP Addr     Dst Port   Encoding   Transport  Count     
--------------------------------------------------------------------------------
192.168.20.123	50001      GPB        gRPC       1

show telemetry data collector brief

This command displays the brief statistics about the data collection.


switch# show telemetry data collector brief 

----------------------------------------------------------------------
Collector Type       Successful Collections     Failed Collections        
----------------------------------------------------------------------
DME                   143                        0

show telemetry data collector details

This command displays detailed statistics about the data collection which includes breakdown of all sensor paths.


switch# show telemetry data collector details 

--------------------------------------------------------------------------------
Succ Collections      Failed Collections     Sensor Path
--------------------------------------------------------------------------------
150                   0                      sys/fm

show telemetry event collector errors

This command displays the errors statistic about the event collection.


switch# show telemetry event collector errors 

--------------------------------------------------------------------------------
Error Description                                  Error Count 
--------------------------------------------------------------------------------
APIC-Cookie Generation Failures                    - 0
Authentication Failures                            - 0
Authentication Refresh Failures                    - 0
Authentication Refresh Timer Start Failures        - 0
Connection Timer Start Failures                    - 0
Connection Attempts                                - 3
Dme Event Subscription Init Failures               - 0
Event Data Enqueue Failures                        - 0
Event Subscription Failures                        - 0
Event Subscription Refresh Failures                - 0
Pending Subscription List Create Failures          - 0
Subscription Hash Table Create Failures            - 0
Subscription Hash Table Destroy Failures           - 0
Subscription Hash Table Insert Failures            - 0
Subscription Hash Table Remove Failures            - 0
Subscription Refresh Timer Start Failures          - 0
Websocket Connect Failures                         - 0

show telemetry event collector stats

This command displays the statistics about the event collection which includes breakdown of all sensor paths.


switch# show telemetry event collector stats 

--------------------------------------------------------------------------------
Collection Count  Latest Collection Time    Sensor Path
--------------------------------------------------------------------------------

show telemetry control pipeline stats

This command displays the statistics for the telemetry pipeline.


switch# show telemetry pipeline stats 
Main Statistics:
    Timers:
        Errors:
            Start Fail        =     0

    Data Collector:
        Errors:
            Node Create Fail  =     0

    Event Collector:
        Errors:
            Node Create Fail  =     0    Node Add Fail     =     0
            Invalid Data      =     0

    

Queue Statistics:
    Request Queue:
        High Priority Queue:
            Info:
                Actual Size       =    50    Current Size      =     0
                Max Size          =     0    Full Count        =     0

            Errors:
                Enqueue Error     =     0    Dequeue Error     =     0

        Low Priority Queue:
            Info:
                Actual Size       =    50    Current Size      =     0
                Max Size          =     0    Full Count        =     0

            Errors:
                Enqueue Error     =     0    Dequeue Error     =     0

    Data Queue:
        High Priority Queue:
            Info:
                Actual Size       =    50    Current Size      =     0
                Max Size          =     0    Full Count        =     0

            Errors:
                Enqueue Error     =     0    Dequeue Error     =     0

        Low Priority Queue:
            Info:
                Actual Size       =    50    Current Size      =     0
                Max Size          =     0    Full Count        =     0

            Errors:
                Enqueue Error     =     0    Dequeue Error     =     0

show telemetry transport

This command displays all configured transport sessions.


switch# show telemetry transport 

Session Id      IP Address      Port       Encoding   Transport  Status    
-----------------------------------------------------------------------------------
0               192.168.20.123   50001      GPB        gRPC       Connected

show telemetry transport <session-id>

This command displays detailed session information for a specific transport session.


switch# show telemetry transport 0 

Session Id:          0                   
IP Address:Port      192.168.20.123:50001 
Encoding:            GPB                  
Transport:           gRPC                
Status:              Disconnected        
Last Connected:      Fri Sep 02 11:45:57.505 UTC

Tx Error Count:      224                 
Last Tx Error:       Fri Sep 02 12:23:49.555 UTC

switch# show telemetry transport 1

Session Id:          1                   
IP Address:Port      10.30.218.56:51235 Encoding:            JSON                 
Transport:           HTTP                
Status:              Disconnected        
Last Connected:      Never               

Tx Error Count:      3                   
Last Tx Error:       Wed Apr 19 15:56:51.617 PDT

show telemetry transport <session-id> stats

This command displays details of a specific transport session.


switch# show telemetry transport 0 stats 

Session Id:          0                   
IP Address:Port      192.168.20.123:50001 
Encoding:            GPB                 
Transport:           GRPC                
Status:              Connected           
Last Connected:      Mon May 01 11:29:46.912 PST
Last Disconnected:   Never               
Tx Error Count:      0                   
Last Tx Error:       None

show telemetry transport <session-id> errors

This command displays detailed error statistics for a specific transport session.


switch# show telemetry transport 0 errors 

Session Id:                    0                   
Connection Stats                                   
   Connection Count            1                   
   Last Connected:             Mon May 01 11:29:46.912 PST
   Disconnect Count            0                   
   Last Disconnected:          Never               
Transmission Stats                                 
   Transmit Count:             1225                
   Last TX time:               Tue May 02 11:40:03.531 PST
   Min Tx Time:                7                   ms
   Max Tx Time:                1760                ms
   Avg Tx Time:                500                 ms

Displaying Telemetry Log and Trace Information

Use the following NX-OS CLI commands to display the log and trace information.

show tech-support telemetry

This NX-OS CLI command collects the telemetry log contents from the tech-support log. In this example, the command output is redirected into a file in bootflash. 


switch# show tech-support telemetry > bootflash:tmst.log

Configuring Telemetry Using the NX-API

Configuring Telemetry Using the NX-API

In the object model of the switch DME, the configuration of the telemetry feature is defined in a hierarchical structure of objects as shown in the section "Telemetry Model in the DME." Following are the main objects to be configured:

  • fmEntity — Contains the NX-API and Telemetry feature states.

    • fmNxapi — Contains the NX-API state.

    • fmTelemetry — Contains the Telemetry feature state.

  • telemetryEntity — Contains the telemetry feature configuration.

    • telemetrySensorGroup — Contains the definitions of one or more sensor paths or nodes to be monitored for telemetry. The telemetry entity can contain one or more sensor groups.

      • telemetryRtSensorGroupRel — Associates the sensor group with a telemetry subscription.

      • telemetrySensorPath — A path to be monitored. The sensor group can contain multiple objects of this type.

    • telemetryDestGroup — Contains the definitions of one or more destinations to receive telemetry data. The telemetry entity can contain one or more destination groups.

      • telemetryRtDestGroupRel — Associates the destination group with a telemetry subscription.

      • telemetryDest — A destination address. The destination group can contain multiple objects of this type.

    • telemetrySubscription — Specifies how and when the telemetry data from one or more sensor groups is sent to one or more destination groups.

      • telemetryRsDestGroupRel — Associates the telemetry subscription with a destination group.

      • telemetryRsSensorGroupRel — Associates the telemetry subscription with a sensor group.

To configure the telemetry feature using the NX-API, you must construct a JSON representation of the telemetry object structure and push it to the DME with an HTTP or HTTPS POST operation.


Note
For detailed instructions on using the NX-API, see the Cisco Nexus 3000 and 9000 Series NX-API REST SDK User Guide and API Reference.

Before you begin

Your switch must be configured to run the NX-API from the CLI:

switch(config)# feature nxapi

SUMMARY STEPS

  1. Enable the telemetry feature.
  2. Create the root level of the JSON payload to describe the telemetry configuration.
  3. Create a sensor group to contain the defined sensor paths.
  4. Define a telemetry destination group.
  5. Define a telemetry destination profile.
  6. Define one or more telemetry destinations, consisting of an IP address and port number to which telemetry data will be sent.
  7. Create a telemetry subscription to configure the telemetry behavior.
  8. Add the sensor group object as a child object to the telemetrySubscription element under the root element (telemetryEntity ).
  9. Create a relation object as a child object of the subscription to associate the subscription to the telemetry sensor group and to specify the data sampling behavior.
  10. Define one or more sensor paths or nodes to be monitored for telemetry.
  11. Add sensor paths as child objects to the sensor group object (telemetrySensorGroup ).
  12. Add destinations as child objects to the destination group object (telemetryDestGroup ).
  13. Add the destination group object as a child object to the root element (telemetryEntity ).
  14. Create a relation object as a child object of the telemetry sensor group to associate the sensor group to the subscription.
  15. Create a relation object as a child object of the telemetry destination group to associate the destination group to the subscription.
  16. Create a relation object as a child object of the subscription to associate the subscription to the telemetry destination group.
  17. Send the resulting JSON structure as an HTTP/HTTPS POST payload to the NX-API endpoint for telemetry configuration.

DETAILED STEPS

  Command or Action Purpose

Step 1

Enable the telemetry feature.

Example:


{
  "fmEntity" : {
    "children" : [{ 
      "fmTelemetry" : {
        "attributes" : {
          "adminSt" : "enabled"
        }
      }
    }
    ]
  }
}

The root element is fmTelemetry and the base path for this element is sys/fm. Configure the adminSt attribute as enabled.

Step 2

Create the root level of the JSON payload to describe the telemetry configuration.

Example:


{
    "telemetryEntity": {
        "attributes": {
            "dn": "sys/tm"
        },
    }
}

The root element is telemetryEntity and the base path for this element is sys/tm. Configure the dn attribute as sys/tm.

Step 3

Create a sensor group to contain the defined sensor paths.

Example:


"telemetrySensorGroup": {
    "attributes": {
        "id": "10",
        "rn": "sensor-10"
        
    },  "children": [{
    }]
}

A telemetry sensor group is defined in an object of class telemetrySensorGroup . Configure the following attributes of the object:

  • id — An identifier for the sensor group. Currently only numeric ID values are supported.

  • rn — The relative name of the sensor group object in the format: sensor-id .

Children of the sensor group object include sensor paths and one or more relation objects (telemetryRtSensorGroupRel ) to associate the sensor group with a telemetry subscription.

Step 4

Define a telemetry destination group.

Example:

{
      "telemetryDestGroup": {
        "attributes": {
          "id": "20"
        }
      }
}

A telemetry destination group is defined in telemetryEntity . Configure the id attribute.

Step 5

Define a telemetry destination profile.

Example:


{
   "telemetryDestProfile": {
      "attributes": {
         "adminSt": "enabled"
      },
      "children": [
         {
            "telemetryDestOptSourceInterface": {
               "attributes": {
                  "name": "lo0"
               }
            }
         }
      ]
   }
}

A telemetry destination profile is defined in telemetryDestProfile .

  • Configure the adminSt attribute as enabled.

  • Under telemetryDestOptSourceInterface , configure the name attribute with an interface name to stream data from the configured interface to a destination with the source IP address.

Step 6

Define one or more telemetry destinations, consisting of an IP address and port number to which telemetry data will be sent.

Example:


{
    "telemetryDest": {
        "attributes": {
             "addr": "1.2.3.4",
             "enc": "GPB",
             "port": "50001",
             "proto": "gRPC",
             "rn": "addr-[1.2.3.4]-port-50001"
        }
    }
}

A telemetry destination is defined in an object of class telemetryDest . Configure the following attributes of the object:

  • addr — The IP address of the destination.

  • port — The port number of the destination.

  • rn — The relative name of the destination object in the format: path-[path] .

  • enc — The encoding type of the telemetry data to be sent. NX-OS supports:

    • Google protocol buffers (GPB) for gRPC.

    • JSON for C.

  • proto — The transport protocol type of the telemetry data to be sent. NX-OS supports:

    • gRPC

    • HTTP

  • Supported encoded types are:

    • HTTP/JSON YES

    • HTTP/Form-data YES Only supported for Bin Logging.

    • GRPC/GPB-Compact YES Native Data Source Only.

    • GRPC/GPB YES

    • UDP/GPB YES

    • UDP/JSON YES

Step 7

Create a telemetry subscription to configure the telemetry behavior.

Example:


"telemetrySubscription": {
    "attributes": {
        "id": "30",
        "rn": "subs-30"
    },  "children": [{
    }]
}

A telemetry subscription is defined in an object of class telemetrySubscription . Configure the following attributes of the object:

  • id — An identifier for the subscription. Currently only numeric ID values are supported.

  • rn — The relative name of the subscription object in the format: subs-id .

Children of the subscription object include relation objects for sensor groups (telemetryRsSensorGroupRel ) and destination groups (telemetryRsDestGroupRel ).

Step 8

Add the sensor group object as a child object to the telemetrySubscription element under the root element (telemetryEntity ).

Example:

{
      "telemetrySubscription": {
        "attributes": {
          "id": "30"
        }
        "children": [{
          "telemetryRsSensorGroupRel": {
            "attributes": {
              "sampleIntvl": "5000",
              "tDn": "sys/tm/sensor-10"
            }
          }
        }
        ]
      }
    }

Step 9

Create a relation object as a child object of the subscription to associate the subscription to the telemetry sensor group and to specify the data sampling behavior.

Example:


"telemetryRsSensorGroupRel": {
    "attributes": {
        "rType": "mo",
        "rn": "rssensorGroupRel-[sys/tm/sensor-10]",
        "sampleIntvl": "5000",
        "tCl": "telemetrySensorGroup",
        "tDn": "sys/tm/sensor-10",
        "tType": "mo"
    }
 }

The relation object is of class telemetryRsSensorGroupRel and is a child object of telemetrySubscription . Configure the following attributes of the relation object:

  • rn — The relative name of the relation object in the format: rssensorGroupRel-[sys/tm/sensor-group-id] .

  • sampleIntvl — The data sampling period in milliseconds. An interval value of 0 creates an event-based subscription, in which telemetry data is sent only upon changes under the specified MO. An interval value greater than 0 creates a frequency-based subscription, in which telemetry data is sent periodically at the specified interval. For example, an interval value of 15000 results in the sending of telemetry data every 15 seconds.

  • tCl — The class of the target (sensor group) object, which is telemetrySensorGroup .

  • tDn — The distinguished name of the target (sensor group) object, which is sys/tm/sensor-group-id .

  • rType — The relation type, which is mo for managed object.

  • tType — The target type, which is mo for managed object.

Step 10

Define one or more sensor paths or nodes to be monitored for telemetry.

Example:

Single sensor path

{
    "telemetrySensorPath": {
        "attributes": {
            "path": "sys/cdp",
            "rn": "path-[sys/cdp]",
            "excludeFilter": "",
            "filterCondition": "",
            "path": "sys/fm/bgp",
            "secondaryGroup": "0",
            "secondaryPath": "",
            "depth": "0"
                    }
    }
}

Example:

Multiple sensor paths

{
    "telemetrySensorPath": {
        "attributes": {
            "path": "sys/cdp",
            "rn": "path-[sys/cdp]",
            "excludeFilter": "",
            "filterCondition": "",
            "path": "sys/fm/bgp",
            "secondaryGroup": "0",
            "secondaryPath": "",
            "depth": "0"
        }
    }
},
{
     "telemetrySensorPath": {
         "attributes": {
            "excludeFilter": "",
            "filterCondition": "",
            "path": "sys/fm/dhcp",
            "secondaryGroup": "0",
            "secondaryPath": "",
            "depth": "0"
        }
    }
}

Example:

Single sensor path filtering for BGP disable events:

{
    "telemetrySensorPath": {
        "attributes": {
            "path": "sys/cdp",
            "rn": "path-[sys/cdp]",
            "excludeFilter": "",
            "filterCondition": "eq(fmBgp.operSt.\"disabled\")",
            "path": "sys/fm/bgp",
            "secondaryGroup": "0",
            "secondaryPath": "",
            "depth": "0"
        }
    }
}

A sensor path is defined in an object of class telemetrySensorPath . Configure the following attributes of the object:

Step 11

Add sensor paths as child objects to the sensor group object (telemetrySensorGroup ).

Step 12

Add destinations as child objects to the destination group object (telemetryDestGroup ).

Step 13

Add the destination group object as a child object to the root element (telemetryEntity ).

Step 14

Create a relation object as a child object of the telemetry sensor group to associate the sensor group to the subscription.

Example:


"telemetryRtSensorGroupRel": {
    "attributes": {
        "rn": "rtsensorGroupRel-[sys/tm/subs-30]",
        "tCl": "telemetrySubscription",
        "tDn": "sys/tm/subs-30"
    }
}

The relation object is of class telemetryRtSensorGroupRel and is a child object of telemetrySensorGroup . Configure the following attributes of the relation object:

  • rn — The relative name of the relation object in the format: rtsensorGroupRel-[sys/tm/subscription-id] .

  • tCl — The target class of the subscription object, which is telemetrySubscription .

  • tDn — The target distinguished name of the subscription object, which is sys/tm/subscription-id .

Step 15

Create a relation object as a child object of the telemetry destination group to associate the destination group to the subscription.

Example:


"telemetryRtDestGroupRel": {
    "attributes": {
        "rn": "rtdestGroupRel-[sys/tm/subs-30]",
        "tCl": "telemetrySubscription",
        "tDn": "sys/tm/subs-30"
    }
}

The relation object is of class telemetryRtDestGroupRel and is a child object of telemetryDestGroup . Configure the following attributes of the relation object:

  • rn — The relative name of the relation object in the format: rtdestGroupRel-[sys/tm/subscription-id] .

  • tCl — The target class of the subscription object, which is telemetrySubscription .

  • tDn — The target distinguished name of the subscription object, which is sys/tm/subscription-id .

Step 16

Create a relation object as a child object of the subscription to associate the subscription to the telemetry destination group.

Example:


"telemetryRsDestGroupRel": {
    "attributes": {
        "rType": "mo",
        "rn": "rsdestGroupRel-[sys/tm/dest-20]",
        "tCl": "telemetryDestGroup",
        "tDn": "sys/tm/dest-20",
        "tType": "mo"
    }
}

The relation object is of class telemetryRsDestGroupRel and is a child object of telemetrySubscription . Configure the following attributes of the relation object:

  • rn — The relative name of the relation object in the format: rsdestGroupRel-[sys/tm/destination-group-id] .

  • tCl — The class of the target (destination group) object, which is telemetryDestGroup .

  • tDn — The distinguished name of the target (destination group) object, which is sys/tm/destination-group-id .

  • rType — The relation type, which is mo for managed object.

  • tType — The target type, which is mo for managed object.

Step 17

Send the resulting JSON structure as an HTTP/HTTPS POST payload to the NX-API endpoint for telemetry configuration.

The base path for the telemetry entity is sys/tm and the NX-API endpoint is: 

{{URL}}/api/node/mo/sys/tm.json

Example

The following is an example of all the previous steps that are collected into one POST payload (note that some attributes may not match):
{
  "telemetryEntity": {
    "children": [{
      "telemetrySensorGroup": {
        "attributes": {
          "id": "10"
        }
        "children": [{
          "telemetrySensorPath": {
            "attributes": {
              "excludeFilter": "",
              "filterCondition": "",
              "path": "sys/fm/bgp",
              "secondaryGroup": "0",
              "secondaryPath": "",
              "depth": "0"
            }
          }
        }
        ]
      }
    },
    {
      "telemetryDestGroup": {
        "attributes": {
          "id": "20"
        }
        "children": [{
          "telemetryDest": {
            "attributes": {
              "addr": "10.30.217.80",
              "port": "50051",
              "enc": "GPB",
              "proto": "gRPC"
            }
          }
        }
        ]
      }
    },
    {
      "telemetrySubscription": {
        "attributes": {
          "id": "30"
        }
        "children": [{
          "telemetryRsSensorGroupRel": {
            "attributes": {
              "sampleIntvl": "5000",
              "tDn": "sys/tm/sensor-10"
            }
          }
        },
        {
          "telemetryRsDestGroupRel": {
            "attributes": {
              "tDn": "sys/tm/dest-20"
            }
          }
        }
        ]
      }
    }
    ]
  }
}

Configuration Example for Telemetry Using the NX-API

Streaming Paths to a Destination

This example creates a subscription that streams paths sys/cdp and sys/ipv4 to a destination 1.2.3.4 port 50001 every five seconds. 


POST https://192.168.20.123/api/node/mo/sys/tm.json

Payload:
{
    "telemetryEntity": {
        "attributes": {
            "dn": "sys/tm"
        },
        "children": [{
            "telemetrySensorGroup": {
                "attributes": {
                    "id": "10",
                    "rn": "sensor-10"
                },  "children": [{
                    "telemetryRtSensorGroupRel": {
                        "attributes": {
                            "rn": "rtsensorGroupRel-[sys/tm/subs-30]",
                            "tCl": "telemetrySubscription",
                            "tDn": "sys/tm/subs-30"
                        }
                    }
                }, {
                    "telemetrySensorPath": {
                        "attributes": {
                            "path": "sys/cdp",
                            "rn": "path-[sys/cdp]",
                            "excludeFilter": "",
                            "filterCondition": "",
                            "secondaryGroup": "0",
                            "secondaryPath": "",
                            "depth": "0"
                        }
                    }
                }, {
                    "telemetrySensorPath": {
                        "attributes": {
                            "path": "sys/ipv4",
                            "rn": "path-[sys/ipv4]",
                            "excludeFilter": "",
                            "filterCondition": "",
                            "secondaryGroup": "0",
                            "secondaryPath": "",
                            "depth": "0"
                        }
                    }
                }]
            }
        }, {
            "telemetryDestGroup": {
                "attributes": {
                    "id": "20",
                    "rn": "dest-20"
                },
                "children": [{
                    "telemetryRtDestGroupRel": {
                        "attributes": {
                            "rn": "rtdestGroupRel-[sys/tm/subs-30]",
                            "tCl": "telemetrySubscription",
                            "tDn": "sys/tm/subs-30"
                        }
                    }
                }, {
                    "telemetryDest": {
                        "attributes": {
                            "addr": "1.2.3.4",
                            "enc": "GPB",
                            "port": "50001",
                            "proto": "gRPC",
                            "rn": "addr-[1.2.3.4]-port-50001"
                        }
                    }
                }]
            }
        }, {
            "telemetrySubscription": {
                "attributes": {
                    "id": "30",
                    "rn": "subs-30"
                },
                "children": [{
                    "telemetryRsDestGroupRel": {
                        "attributes": {
                            "rType": "mo",
                            "rn": "rsdestGroupRel-[sys/tm/dest-20]",
                            "tCl": "telemetryDestGroup",
                            "tDn": "sys/tm/dest-20",
                            "tType": "mo"
                        }
                    }
                }, {
                    "telemetryRsSensorGroupRel": {
                        "attributes": {
                            "rType": "mo",
                            "rn": "rssensorGroupRel-[sys/tm/sensor-10]",
                            "sampleIntvl": "5000",
                            "tCl": "telemetrySensorGroup",
                            "tDn": "sys/tm/sensor-10",
                            "tType": "mo"
                        }
                    }
                }]
            }
        }]
    }
}

Filter Conditions on BGP Notifications

The following example payload enables notifications that trigger when the BFP feature is disabled as per the filterCondition attribute in the telemetrySensorPath MO. The data is streamed to10.30.217.80 port 50055. 

POST  https://192.168.20.123/api/node/mo/sys/tm.json

Payload:
{
  "telemetryEntity": {
    "children": [{
      "telemetrySensorGroup": {
        "attributes": {
          "id": "10"
        }
        "children": [{
          "telemetrySensorPath": {
            "attributes": {
              "excludeFilter": "",
              "filterCondition": "eq(fmBgp.operSt,\"disabled\")",
              "path": "sys/fm/bgp",
              "secondaryGroup": "0",
              "secondaryPath": "",
              "depth": "0"
            }
          }
        }
        ]
      }
    },
    {
      "telemetryDestGroup": {
        "attributes": {
          "id": "20"
        }
        "children": [{
          "telemetryDest": {
            "attributes": {
              "addr": "10.30.217.80",
              "port": "50055",
              "enc": "GPB",
              "proto": "gRPC"
            }
          }
        }
        ]
      }
    },
    {
      "telemetrySubscription": {
        "attributes": {
          "id": "30"
        }
        "children": [{
          "telemetryRsSensorGroupRel": {
            "attributes": {
              "sampleIntvl": "0",
              "tDn": "sys/tm/sensor-10"
            }
          }
        },
        {
          "telemetryRsDestGroupRel": {
            "attributes": {
              "tDn": "sys/tm/dest-20"
            }
          }
        }
        ]
      }
    }
    ]
  }
}

Using Postman Collection for Telemetry Configuration

An example Postman collection is an easy way to start configuring the telemetry feature, and can run all telemetry CLI equivalents in a single payload. Modify the file in the preceding link using your preferred text editor to update the payload to your needs, then open the collection in Postman and run the collection.

Telemetry Model in the DME

The telemetry application is modeled in the DME with the following structure: 


model
|----package [name:telemetry]
    |  @name:telemetry
    |----objects
         |----mo [name:Entity]
              |    @name:Entity
              |      @label:Telemetry System
              |--property 
              |    @name:adminSt
              |      @type:AdminState
              |
              |----mo [name:SensorGroup]
              |    |    @name:SensorGroup
              |    |      @label:Sensor Group
              |    |--property
              |    |    @name:id [key]
              |    |      @type:string:Basic
              |    |
              |    |----mo [name:SensorPath]
              |         |   @name:SensorPath
              |         |     @label:Sensor Path
              |         |--property
              |         |    @name:path [key]
              |         |      @type:string:Basic
              |         |    @name:filterCondition
              |         |      @type:string:Basic
              |         |    @name:excludeFilter
              |         |      @type:string:Basic
              |         |    @name:depth
              |         |      @type:RetrieveDepth
              |
              |----mo [name:DestGroup]
              |    |    @name:DestGroup
              |    |      @label:Destination Group
              |    |--property
              |    |    @name:id
              |    |      @type:string:Basic
              |    |        
              |    |----mo [name:Dest]
              |         |   @name:Dest
              |         |     @label:Destination
              |         |--property
              |         |    @name:addr [key]
              |         |      @type:address:Ip
              |         |    @name:port [key]
              |         |      @type:scalar:Uint16
              |         |    @name:proto
              |         |      @type:Protocol
              |         |    @name:enc
              |         |      @type:Encoding
              |
              |----mo [name:Subscription]
                   |    @name:Subscription
                   |      @label:Subscription
                   |--property
                   |    @name:id
                   |      @type:scalar:Uint64
                   |----reldef
                   |    |  @name:SensorGroupRel
                   |    |    @to:SensorGroup
                   |    |    @cardinality:ntom
                   |    |    @label:Link to sensorGroup entry
                   |    |--property
                   |         @name:sampleIntvl
                   |           @type:scalar:Uint64
                   |
                   |----reldef
                        |  @name:DestGroupRel
                        |    @to:DestGroup
                        |    @cardinality:ntom
                        |    @label:Link to destGroup entry

Telemetry Path Labels

About Telemetry Path Labels

Beginning with NX-OS release 9.3(1), model-driven telemetry supports path labels. Path labels provide an easy way to gather telemetry data from multiple sources at once. With this feature, you specify the type of telemetry data you want collected, and the telemetry feature gathers that data from multiple paths. The feature then returns the information to one consolidated place, the path label. This feature simplifies using telemetry because you no longer must:

  • Have a deep and comprehensive knowledge of the Cisco DME model.

  • Create multiple queries and add multiple paths to the subscription, while balancing the number of collected events and the cadence.

  • Collect multiple chunks of telemetry information from the switch, which simplifies serviceability.

Path labels span across multiple instances of the same object type in the model, then gather and return counters or events. Path labels support the following telemetry groups:

  • Environment, which monitors chassis information, including fan, temperature, power, storage, supervisors, and line cards.

  • Interface, which monitors all the interface counters and status changes.

    This label supports predefined keyword filters that can refine the returned data by using the query-condition command.

  • Resources, which monitors system resources such as CPU utilization and memory utilization.

  • VXLAN, which monitors VXLAN EVPNs including VXLAN peers, VXLAN counters, VLAN counters, and BGP Peer data.

Polling for Data or Receiving Events

The sample interval for a sensor group determines how and when telemetry data is transmitted to a path label. The sample interval can be configured either to periodically poll for telemetry data or gather telemetry data when events occur.

  • When the sample interval for telemetry is configured as a non-zero value, telemetry periodically sends the data for the environment, interfaces, resources, and VXLAN labels during each sample interval.

  • When the sample interval is set to zero, telemetry sends event notifications when the environment, interfaces, resources, and VXLAN labels experience operational state updates, as well as creation and deletion of MOs.

Polling for data or receiving events are mutually exclusive. You can configure polling or event-driven telemetry for each path label.

Guidelines and Limitations for Path Labels

The telemetry path labels feature has the following guidelines and limitations:

  • The feature supports only Cisco DME data source only.

  • You cannot mix and match usability paths with regular DME paths in the same sensor group. For example, you cannot configure sys/intf and interface in the same sensor group. Also, you cannot configure the same sensor group with sys/intf and interface. If this situation occurs, NX-OS rejects the configuration.

  • User filter keywords, such as oper-speed and counters=[detailed], are supported only for the interface path.

  • The feature does not support other sensor path options, such as depth or filter-condition.

Configuring the Interface Path to Poll for Data or Events

The interface path label monitors all the interface counters and status changes. It supports the following interface types:

  • Physical

  • Subinterface

  • Management

  • Loopback

  • VLAN

  • Port Channel

You can configure the interface path label to either periodically poll for data or receive events. See Polling for Data or Receiving Events.


Note

The model does not support counters for subinterface, loopback, or VLAN, so they are not streamed out.

SUMMARY STEPS

  1. configure terminal
  2. telemetry
  3. sensor-group sgrp_id
  4. path interface
  5. destination-group grp_id
  6. ip address ip_addr port port
  7. subscription sub_id
  8. snsr-group sgrp_id sample-interval interval
  9. dst-group dgrp_id

DETAILED STEPS

  Command or Action Purpose

Step 1

configure terminal

Example:

switch-1# configure terminal
switch-1(config)#

Enter configuration mode.

Step 2

telemetry

Example:

switch-1(config)# telemetry
switch-1(config-telemetry)#

Enter configuration mode for the telemetry features.

Step 3

sensor-group sgrp_id

Example:

switch-1(config-telemetry)# sensor-group 6
switch-1(conf-tm-sensor)#

Create a sensor group for telemetry data.

Step 4

path interface

Example:

switch-1(conf-tm-sensor)# path interface
switch-1(conf-tm-sensor)#

Configure the interface path label, which enables sending one telemetry data query for multiple individual interfaces. The label consolidates the queries for multiple interfaces into one. Telemetry then telemetry gathers the data and returns it to the label.

Depending on how the polling interval is configured, interface data is sent based on a periodic basis or whenever the interface state changes.

Step 5

destination-group grp_id

Example:

switch-1(conf-tm-sensor)# destination-group 33
switch-1(conf-tm-dest)#
Enter telemetry destination group submode and configure the destination group.

Step 6

ip address ip_addr port port

Example:

switch-1(conf-tm-dest)# ip address 1.2.3.4 port 50004
switch-1(conf-tm-dest)#
Configure the telemetry data for the subscription to stream to the specified IP address and port.

Step 7

subscription sub_id

Example:

switch-1(conf-tm-dest)# subscription 33
switch-1(conf-tm-sub)#
Enter telemetry subscription submode, and configure the telemetry subscription.

Step 8

snsr-group sgrp_id sample-interval interval

Example:

switch-1(conf-tm-sub)# snsr-grp 6 sample-interval 5000 
switch-1(conf-tm-sub)#

Link the sensor group to the current subscription and set the data sampling interval in milliseconds. The sampling interval determines whether the switch sends telemetry data periodically, or when interface events occur.

Step 9

dst-group dgrp_id

Example:

switch-1(conf-tm-sub)# dst-grp 33 
switch-1(conf-tm-sub)#

Link the destination group to the current subscription. The destination group that you specify must match the destination group that you configured in the destination-group command.

Configuring the Interface Path for Non-Zero Counters

You can configure the interface path label with a predefined keyword filter that returns only counters that have nonzero values. The filter is counters=[detailed].

By using this filter, the interface path gathers all the available interface counters, filters the collected data, then forwards the results to the receiver. The filter is optional, and if you do not use it, all counters, including zero-value counters, are displayed for the interface path.


Note
Using the filter is conceptually similar to issuing show interface mgmt0 counters detailed

SUMMARY STEPS

  1. configure terminal
  2. telemetry
  3. sensor-group sgrp_id
  4. path interface query-condition counters=[detailed]
  5. destination-group grp_id
  6. ip address ip_addr port port
  7. subscription sub_id
  8. snsr-group sgrp_id sample-interval interval
  9. dst-group dgrp_id

DETAILED STEPS

  Command or Action Purpose

Step 1

configure terminal

Example:

switch-1# configure terminal
switch-1(config)#

Enter configuration mode.

Step 2

telemetry

Example:

switch-1(config)# telemetry
switch-1(config-telemetry)#

Enter configuration mode for the telemetry features.

Step 3

sensor-group sgrp_id

Example:

switch-1(config-telemetry)# sensor-group 6
switch-1(conf-tm-sensor)#

Create a sensor group for telemetry data.

Step 4

path interface query-condition counters=[detailed]

Example:

switch-1(conf-tm-sensor)# path interface query-condition counters=[detailed]
switch-1(conf-tm-sensor)#

Configure the interface path label and query for only the nonzero counters from all interfaces.

Step 5

destination-group grp_id

Example:

switch-1(conf-tm-sensor)# destination-group 33
switch-1(conf-tm-dest)#
Enter telemetry destination group submode and configure the destination group.

Step 6

ip address ip_addr port port

Example:

switch-1(conf-tm-dest)# ip address 1.2.3.4 port 50004
switch-1(conf-tm-dest)#
Configure the telemetry data for the subscription to stream to the specified IP address and port.

Step 7

subscription sub_id

Example:

switch-1(conf-tm-dest)# subscription 33
switch-1(conf-tm-sub)#
Enter telemetry subscription submode, and configure the telemetry subscription.

Step 8

snsr-group sgrp_id sample-interval interval

Example:

switch-1(conf-tm-sub)# snsr-grp 6 sample-interval 5000 
switch-1(conf-tm-sub)#

Link the sensor group to the current subscription and set the data sampling interval in milliseconds. The sampling interval determines whether the switch sends telemetry data periodically, or when interface events occur.

Step 9

dst-group dgrp_id

Example:

switch-1(conf-tm-sub)# dst-grp 33 
switch-1(conf-tm-sub)#

Link the destination group to the current subscription. The destination group that you specify must match the destination group that you configured in the destination-group command.

Configuring the Interface Path for Operational Speeds

You can configure the interface path label with a pre-defined keyword filter that returns counters for interfaces of specified operational speeds. The filter is oper-speed=[]. The following operational speeds are supported: auto, 10M, 100M, 1G, 10G, 40G, 200G, and 400G.

By using this filter, the interface path gathers the telemetry data for interfaces of the specified speed, then forwards the results to the receiver. The filter is optional. If you do not use it, counters for all interfaces are displayed, regardless of their operational speed.

The filter can accept multiple speeds as a comma-separated list, for example oper-speed=[1G,10G] to retrieve counters for interfaces that operate at 1 and 10 Gbps. Do not use a blank space as a delimiter.


Note
Interface types subinterface, loopback, and VLAN do not have operational speed properties, so the filter does not support these interface types.

SUMMARY STEPS

  1. configure terminal
  2. telemetry
  3. snsr-group sgrp_id sample-interval interval
  4. path interface query-condition oper-speed=[speed]
  5. destination-group grp_id
  6. ip address ip_addr port port
  7. subscription sub_id
  8. snsr-group sgrp_id sample-interval interval
  9. dst-group dgrp_id

DETAILED STEPS

  Command or Action Purpose

Step 1

configure terminal

Example:

switch-1# configure terminal
switch-1(config)#

Enter configuration mode.

Step 2

telemetry

Example:

switch-1(config)# telemetry
switch-1(config-telemetry)#

Enter configuration mode for the telemetry features.

Step 3

snsr-group sgrp_id sample-interval interval

Example:

switch-1(conf-tm-sub)# snsr-grp 6 sample-interval 5000 
switch-1(conf-tm-sub)#

Link the sensor group to the current subscription and set the data sampling interval in milliseconds. The sampling interval determines whether the switch sends telemetry data periodically, or when interface events occur.

Step 4

path interface query-condition oper-speed=[speed]

Example:

switch-1(conf-tm-sensor)# path interface query-condition oper-speed=[1G,40G]
switch-1(conf-tm-sensor)#

Configure the interface path label and query for counters from interfaces running the specified speed, which in this example, is 1 and 40 Gbps only.

Step 5

destination-group grp_id

Example:

switch-1(conf-tm-sensor)# destination-group 33
switch-1(conf-tm-dest)#
Enter telemetry destination group submode and configure the destination group.

Step 6

ip address ip_addr port port

Example:

switch-1(conf-tm-dest)# ip address 1.2.3.4 port 50004
switch-1(conf-tm-dest)#
Configure the telemetry data for the subscription to stream to the specified IP address and port.

Step 7

subscription sub_id

Example:

switch-1(conf-tm-dest)# subscription 33
switch-1(conf-tm-sub)#
Enter telemetry subscription submode, and configure the telemetry subscription.

Step 8

snsr-group sgrp_id sample-interval interval

Example:

switch-1(conf-tm-sub)# snsr-grp 6 sample-interval 5000 
switch-1(conf-tm-sub)#

Link the sensor group to the current subscription and set the data sampling interval in milliseconds. The sampling interval determines whether the switch sends telemetry data periodically, or when interface events occur.

Step 9

dst-group dgrp_id

Example:

switch-1(conf-tm-sub)# dst-grp 33 
switch-1(conf-tm-sub)#

Link the destination group to the current subscription. The destination group that you specify must match the destination group that you configured in the destination-group command.

Configuring the Interface Path with Multiple Queries

You can configure multiple filters for the same query condition in the interface path label. When you do so, the individual filters you use are ANDed.

Separate each filter in the query condition by using a comma. You can specify any number of filters for the query-condition, but the more filters you add, the more focused the results become.

SUMMARY STEPS

  1. configure terminal
  2. telemetry
  3. sensor-group sgrp_id
  4. path interface query-condition counters=[detailed],oper-speed=[1G,40G]
  5. destination-group grp_id
  6. ip address ip_addr port port
  7. subscription sub_id
  8. snsr-group sgrp_id sample-interval interval
  9. dst-group dgrp_id

DETAILED STEPS

  Command or Action Purpose

Step 1

configure terminal

Example:

switch-1# configure terminal
switch-1(config)#

Enter configuration mode.

Step 2

telemetry

Example:

switch-1(config)# telemetry
switch-1(config-telemetry)#

Enter configuration mode for the telemetry features.

Step 3

sensor-group sgrp_id

Example:

switch-1(config-telemetry)# sensor-group 6
switch-1(conf-tm-sensor)#

Create a sensor group for telemetry data.

Step 4

path interface query-condition counters=[detailed],oper-speed=[1G,40G]

Example:

switch-1(conf-tm-sensor)# path interface query-condition counters=[detailed],oper-speed=[1G,40G]
switch-1(conf-tm-sensor)#

Configures multiple conditions in the same query. In this example, the query does both of the following:

  • Gathers and returns non-zero counters on interfaces running at 1 Gbps.

  • Gathers and returns non-zero counters on interfaces running at 40 Gbps.

Step 5

destination-group grp_id

Example:

switch-1(conf-tm-sensor)# destination-group 33
switch-1(conf-tm-dest)#
Enter telemetry destination group submode and configure the destination group.

Step 6

ip address ip_addr port port

Example:

switch-1(conf-tm-dest)# ip address 1.2.3.4 port 50004
switch-1(conf-tm-dest)#
Configure the telemetry data for the subscription to stream to the specified IP address and port.

Step 7

subscription sub_id

Example:

switch-1(conf-tm-dest)# subscription 33
switch-1(conf-tm-sub)#
Enter telemetry subscription submode, and configure the telemetry subscription.

Step 8

snsr-group sgrp_id sample-interval interval

Example:

switch-1(conf-tm-sub)# snsr-grp 6 sample-interval 5000 
switch-1(conf-tm-sub)#

Link the sensor group to the current subscription and set the data sampling interval in milliseconds. The sampling interval determines whether the switch sends telemetry data periodically, or when interface events occur.

Step 9

dst-group dgrp_id

Example:

switch-1(conf-tm-sub)# dst-grp 33 
switch-1(conf-tm-sub)#

Link the destination group to the current subscription. The destination group that you specify must match the destination group that you configured in the destination-group command.

Configuring the Environment Path to Poll for Data or Events

The environment path label monitors chassis information, including fan, temperature, power, storage, supervisors, and line cards. You can configure the environment path to either periodically poll for telemetry data or get the data when events occur. For information, see Polling for Data or Receiving Events.

You can set the resources path to return system resource information through either periodic polling or based on events. This path does not support filtering.

SUMMARY STEPS

  1. configure terminal
  2. telemetry
  3. sensor-group sgrp_id
  4. path environment
  5. destination-group grp_id
  6. ip address ip_addr port port
  7. subscription sub_id
  8. snsr-group sgrp_id sample-interval interval
  9. dst-group dgrp_id

DETAILED STEPS

  Command or Action Purpose

Step 1

configure terminal

Example:

switch-1# configure terminal
switch-1(config)#

Enter configuration mode.

Step 2

telemetry

Example:

switch-1(config)# telemetry
switch-1(config-telemetry)#

Enter configuration mode for the telemetry features.

Step 3

sensor-group sgrp_id

Example:

switch-1(config-telemetry)# sensor-group 6
switch-1(conf-tm-sensor)#

Create a sensor group for telemetry data.

Step 4

path environment

Example:

switch-1(conf-tm-sensor)# path environment
switch-1(conf-tm-sensor)#

Configures the environment path label, which enables telemetry data for multiple individual environment objects to be sent to the label. The label consolidates the multiple data inputs into one output.

Depending on the sample interval, the environment data is either streaming based on the polling interval, or sent when events occur.

Step 5

destination-group grp_id

Example:

switch-1(conf-tm-sensor)# destination-group 33
switch-1(conf-tm-dest)#
Enter telemetry destination group submode and configure the destination group.

Step 6

ip address ip_addr port port

Example:

switch-1(conf-tm-dest)# ip address 1.2.3.4 port 50004
switch-1(conf-tm-dest)#
Configure the telemetry data for the subscription to stream to the specified IP address and port.

Step 7

subscription sub_id

Example:

switch-1(conf-tm-dest)# subscription 33
switch-1(conf-tm-sub)#
Enter telemetry subscription submode, and configure the telemetry subscription.

Step 8

snsr-group sgrp_id sample-interval interval

Example:

switch-1(conf-tm-sub)# snsr-grp 6 sample-interval 5000 
switch-1(conf-tm-sub)#

Link the sensor group to the current subscription and set the data sampling interval in milliseconds. The sampling interval determines whether the switch sends telemetry data periodically, or when environment events occur.

Step 9

dst-group dgrp_id

Example:

switch-1(conf-tm-sub)# dst-grp 33 
switch-1(conf-tm-sub)#

Link the destination group to the current subscription. The destination group that you specify must match the destination group that you configured in the destination-group command.

Configuring the Resources Path for Poll for Events or Data

The resources path monitors system resources such as CPU utilization and memory utilization. You can configure this path to either periodically gather telemetry data, or when events occur. See Polling for Data or Receiving Events .

This path does not support filtering.

SUMMARY STEPS

  1. configure terminal
  2. telemetry
  3. sensor-group sgrp_id
  4. path resources
  5. destination-group grp_id
  6. ip address ip_addr port port
  7. subscription sub_id
  8. snsr-group sgrp_id sample-interval interval
  9. dst-group dgrp_id

DETAILED STEPS

  Command or Action Purpose

Step 1

configure terminal

Example:

switch-1# configure terminal
switch-1(config)#

Enter configuration mode.

Step 2

telemetry

Example:

switch-1(config)# telemetry
switch-1(config-telemetry)#

Enter configuration mode for the telemetry features.

Step 3

sensor-group sgrp_id

Example:

switch-1(config-telemetry)# sensor-group 6
switch-1(conf-tm-sensor)#

Create a sensor group for telemetry data.

Step 4

path resources

Example:

switch-1(conf-tm-sensor)# path resources
switch-1(conf-tm-sensor)#

Configure the resources path label, which enables telemetry data for multiple individual system resources to be sent to the label. The label consolidates the multiple data inputs into one output.

Depending on the sample interval, the resource data is either streaming based on the polling interval, or sent when system memory changes to Not OK.

Step 5

destination-group grp_id

Example:

switch-1(conf-tm-sensor)# destination-group 33
switch-1(conf-tm-dest)#
Enter telemetry destination group submode and configure the destination group.

Step 6

ip address ip_addr port port

Example:

switch-1(conf-tm-dest)# ip address 1.2.3.4 port 50004
switch-1(conf-tm-dest)#
Configure the telemetry data for the subscription to stream to the specified IP address and port.

Step 7

subscription sub_id

Example:

switch-1(conf-tm-dest)# subscription 33
switch-1(conf-tm-sub)#
Enter telemetry subscription submode, and configure the telemetry subscription.

Step 8

snsr-group sgrp_id sample-interval interval

Example:

switch-1(conf-tm-sub)# snsr-grp 6 sample-interval 5000 
switch-1(conf-tm-sub)#

Link the sensor group to the current subscription and set the data sampling interval in milliseconds. The sampling interval determines whether the switch sends telemetry data periodically, or when resource events occur.

Step 9

dst-group dgrp_id

Example:

switch-1(conf-tm-sub)# dst-grp 33 
switch-1(conf-tm-sub)#

Link the destination group to the current subscription. The destination group that you specify must match the destination group that you configured in the destination-group command.

Configuring the VXLAN Path to Poll for Events or Data

The VXLAN path label provides information about the switch's Virtual Extensible LAN EVPNs, including VXLAN peers, VXLAN counters, VLAN counters, and BGP Peer data. You can configure this path label to gather telemetry information either periodically, or when events occur. See Polling for Data or Receiving Events.

This path does not support filtering.

SUMMARY STEPS

  1. configure terminal
  2. telemetry
  3. sensor-group sgrp_id
  4. vxlan environment
  5. destination-group grp_id
  6. ip address ip_addr port port
  7. subscription sub_id
  8. snsr-group sgrp_id sample-interval interval
  9. dst-group dgrp_id

DETAILED STEPS

  Command or Action Purpose

Step 1

configure terminal

Example:

switch-1# configure terminal
switch-1(config)#

Enter configuration mode.

Step 2

telemetry

Example:

switch-1(config)# telemetry
switch-1(config-telemetry)#

Enter configuration mode for the telemetry features.

Step 3

sensor-group sgrp_id

Example:

switch-1(config-telemetry)# sensor-group 6
switch-1(conf-tm-sensor)#

Create a sensor group for telemetry data.

Step 4

vxlan environment

Example:

switch-1(conf-tm-sensor)# vxlan environment
switch-1(conf-tm-sensor)#

Configure the VXLAN path label, which enables telemetry data for multiple individual VXLAN objects to be sent to the label. The label consolidates the multiple data inputs into one output. Depending on the sample interval, the VXLAN data is either streaming based on the polling interval, or sent when events occur.

Step 5

destination-group grp_id

Example:

switch-1(conf-tm-sensor)# destination-group 33
switch-1(conf-tm-dest)#
Enter telemetry destination group submode and configure the destination group.

Step 6

ip address ip_addr port port

Example:

switch-1(conf-tm-dest)# ip address 1.2.3.4 port 50004
switch-1(conf-tm-dest)#
Configure the telemetry data for the subscription to stream to the specified IP address and port.

Step 7

subscription sub_id

Example:

switch-1(conf-tm-dest)# subscription 33
switch-1(conf-tm-sub)#
Enter telemetry subscription submode, and configure the telemetry subscription.

Step 8

snsr-group sgrp_id sample-interval interval

Example:

switch-1(conf-tm-sub)# snsr-grp 6 sample-interval 5000 
switch-1(conf-tm-sub)#

Link the sensor group to the current subscription and set the data sampling interval in milliseconds. The sampling interval determines whether the switch sends telemetry data periodically, or when VXLAN events occur.

Step 9

dst-group dgrp_id

Example:

switch-1(conf-tm-sub)# dst-grp 33 
switch-1(conf-tm-sub)#

Link the destination group to the current subscription. The destination group that you specify must match the destination group that you configured in the destination-group command.

Verifying the Path Label Configuration

At any time, you can verify that path labels are configured, and check their values by displaying the running telemetry configuration.

SUMMARY STEPS

  1. show running-config-telemetry

DETAILED STEPS

Command or Action Purpose

show running-config-telemetry

Example:

switch-1(conf-tm-sensor)# show running-config telemetry

!Command: show running-config telemetry
!Running configuration last done at: Mon Jun 10 08:10:17 2019
!Time: Mon Jun 10 08:10:17 2019

version 9.3(1) Bios:version  
feature telemetry

telemetry
  destination-profile
    use-nodeid tester
    sensor-group 4
      path interface query-condition and(counters=[detailed],oper-speed=[1G,10G])
    sensor-group 6
      path interface query-condition oper-speed=[1G,40G]
    subscription 6
      snsr-grp 6 sample-interval 6000
 nxosv2(conf-tm-sensor)#
Displays the current running config for telemetry,
In this example, sensor group 4 is configured to gather non-zero counters from interfaces running at 1 and 10 Gbps. Sensor group 6 is configured to gather all counters from interfaces running at 1 and 40 Gbps.

Displaying Path Label Information

Path Label Show Commands

Through the show telemetry usability commands, you can display the individual paths that the path label walks when you issue a query.

Command

Shows

show telemetry usability {all | environment | interface | resources | vxlan}

Either all telemetry paths for all path labels, or all telemetry paths for a specified path label. Also, the output shows whether each path reports telemetry data based on periodic polling or events.

For the interfaces path label, also any keyword filters or query conditions you configured.

show running-config telemetry

The running configuration for telemetry and selected path information.

Command Examples


Note
The show telemetry usability all command is a concatenation of all the individual commands that are shown in this section.
The following shows an example of the show telemetry usability environment command.
switch-1# show telemetry usability environment
  1) label_name          : environment

     path_name           : sys/ch
     query_type          : poll
     query_condition     : rsp-subtree=full&query-target=subtree&target-subtree-class=eqptPsuSlot,eqptFtSlot,eqptSupCSlot,eqptPsu,eqptFt,eqptSensor,eqptLCSlot

  2) label_name          : environment

     path_name           : sys/ch
     query_type          : event
     query_condition     : rsp-subtree=full&query-target=subtree&query-target-filter=or(or(deleted(),created()),or(and(updated(eqptFan.operSt),ne(eqptFan.operSt,"ok")),and(updated(eqptDimm.operSt),ne(eqptDimm.operSt,"ok")),and(updated(eqptFlash.operSt),ne(eqptFlash.operSt,"ok")),and(updated(eqptSpromSup.operSt),ne(eqptSpromSup.operSt,"ok")),and(updated(eqptSpromLc.operSt),ne(eqptSpromLc.operSt,"ok"))))
switch-1#
The following shows the output of the show telemetry usability interface command. 
switch-1# show telemetry usability interface 
  1) label_name          : interface

     path_name           : sys/intf
     query_type          : poll
     query_condition     : query-target=children&query-target-filter=eq(l1PhysIf.adminSt,"up")&rsp-subtree=children&rsp-subtree-class=rmonEtherStats,rmonIfIn,rmonIfOut,rmonIfHCIn,rmonIfHCOut

  2) label_name          : interface

     path_name           : sys/mgmt-[mgmt0]
     query_type          : poll
     query_condition     : query-target=subtree&query-target-filter=eq(mgmtMgmtIf.adminSt,"up")&rsp-subtree=full&rsp-subtree-class=rmonEtherStats,rmonIfIn,rmonIfOut,rmonIfHCIn,rmonIfHCOut

  3) label_name          : interface

     path_name           : sys/intf
     query_type          : event
     query_condition     : query-target=subtree&query-target-filter=or(or(deleted(),created()),or(and(updated(ethpmPhysIf.operSt),eq(ethpmPhysIf.operSt,"down")),and(updated(ethpmPhysIf.operSt),eq(ethpmPhysIf.operSt,"up")),and(updated(ethpmLbRtdIf.operSt),eq(ethpmLbRtdIf.operSt,"down")),and(updated(ethpmLbRtdIf.operSt),eq(ethpmLbRtdIf.operSt,"up")),and(updated(ethpmAggrIf.operSt),eq(ethpmAggrIf.operSt,"down")),and(updated(ethpmAggrIf.operSt),eq(ethpmAggrIf.operSt,"up")),and(updated(ethpmEncRtdIf.operSt),eq(
ethpmEncRtdIf.operSt,"down")),and(updated(ethpmEncRtdIf.operSt),eq(ethpmEncRtdIf.operSt,"up"))))

  4) label_name          : interface

     path_name           : sys/mgmt-[mgmt0]
     query_type          : event
     query_condition     : query-target=subtree&query-target-filter=or(or(deleted(),created()),or(and(updated(imMgmtIf.operSt),eq(imMgmtIf.operSt,"down")),and(updated(imMgmtIf.operSt),eq(imMgmtIf.operSt,"up"))))
switch-1#
The following shows an example of the show telemetry usability resources command.
switch-1# show telemetry usability resources 
  1) label_name          : resources

     path_name           : sys/proc
     query_type          : poll
     query_condition     : rsp-subtree=full&rsp-foreign-subtree=ephemeral

  2) label_name          : resources

     path_name           : sys/procsys
     query_type          : poll
     query_condition     : query-target=subtree&target-subtree-class=procSystem,procSysCore,procSysCpuSummary,procSysCpu,procIdle,procIrq,procKernel,procNice,procSoftirq,procTotal,procUser,procWait,procSysCpuHistory,procSysLoad,procSysMem,procSysMemFree,procSysMemUsage,procSysMemUsed

  3) label_name          : resources

     path_name           : sys/procsys/sysmem
     query_type          : event
     query_condition     : query-target-filter=and(updated(procSysMem.memstatus),ne(procSysMem.memstatus,"OK"))

switch-1#
The following shows an example of the show telemetry usability vxlan command. 
switch-1# show telemetry usability vxlan 
  1) label_name          : vxlan

     path_name           : sys/bd
     query_type          : poll
     query_condition     : query-target=subtree&target-subtree-class=l2VlanStats

  2) label_name          : vxlan

     path_name           : sys/eps
     query_type          : poll
     query_condition     : rsp-subtree=full&rsp-foreign-subtree=ephemeral

  3) label_name          : vxlan

     path_name           : sys/eps
     query_type          : event
     query_condition     : query-target=subtree&target-subtree-class=nvoDyPeer

  4) label_name          : vxlan

     path_name           : sys/bgp
     query_type          : event
     query_condition     : query-target=subtree&query-target-filter=or(deleted(),created())

  5) label_name          : vxlan

     path_name           : sys/bgp
     query_type          : event
     query_condition     : query-target=subtree&target-subtree-class=bgpDom,bgpPeer,bgpPeerAf,bgpDomAf,bgpPeerAfEntry,bgpOperRtctrlL3,bgpOperRttP,bgpOperRttEntry,bgpOperAfCtrl

switch-1#

Native Data Source Paths

About Native Data Source Paths

NX-OS Telemetry supports the native data source, which is a neutral data source that is not restricted to a specific infrastructure or database. Instead, the native data source enables components or applications to hook into and inject relevant information into the outgoing telemetry stream. This feature provides flexibility because the path for the native data source does not belong to any infrastructure, so any native applications can interact with NX-OS Telemetry.

The native data source path enables you to subscribe to specific sensor paths to receive selected telemetry data. The feature works with the NX-SDK to support streaming telemetry data from the following paths:

  • RIB path, which sends telemetry data for the IP routes.

  • MAC path, which sends telemetry data for static and dynamic MAC entries.

  • Adjacency path, which sends telemetry data for IPv4 and IPv6 adjacencies.

When you create a subscription, all telemetry data for the selected path streams to the receiver as a baseline. After the baseline, only event notifications stream to the receiver.

Streaming of native data source paths supports the following encoding types:

  • Google Protobuf (GPB)

  • JavaScript Object Notation (JSON)

  • Compact Google Protobuf (compact GPB)

Telemetry Data Streamed for Native Data Source Paths

For each source path, the following table shows the information that is streamed when the subscription is first created (the baseline) and when event notifications occur.

Path Type

Subscription Baseline

Event Notifications

RIB

Sends all routes

Sends event notifications for create, update, and delete events. The following values are exported through telemetry for the RIB path:

  • Next-hop routing information:

    • Address of the next hop

    • Outgoing interface for the next hop

    • VRF name for the next hop

    • Owner of the next hop

    • Preference for the next hop

    • Metric for the next hop

    • Tag for the next hop

    • Segment ID for the next hop

    • Tunnel ID for the next hop

    • Encapsulation type for the next hop

    • Bitwise OR of flags for the Next Hop Type

  • For Layer-3 routing information:

    • VRF name of the route

    • Route prefix address

    • Mask length for the route

    • Number of next hops for the route

    • Event type

    • Next hops

MAC

Executes a GETALL from DME for static and dynamic MAC entries

Sends event notifications for add, update, and delete events. The following values are exported through telemetry for the MAC path:

  • MAC address

  • MAC address type

  • VLAN number

  • Interface name

  • Event types

Both static and dynamic entires are supported in event notifications.

Adjacency

Sends the IPv4 and IPv6 adjacencies

Sends event notifications for add, update, and delete events. The following values are exported through telemetry for the Adjacency path:

  • IP address

  • MAC address

  • Interface name

  • Physical interface name

  • VRF name

  • Preference

  • Source for the adjacency

  • Address family for the adjacency

  • Adjacency event type

For additional information, refer to Github https://github.com/CiscoDevNet/nx-telemetry-proto.

Guidelines and Limitations for Native Data Source Path

The native data source path feature has the following guidelines and limitations:

  • For streaming from the RIB, MAC, and Adjacency native data source paths, sensor-path property updates do not support custom criteria like depth , query-condition , or filter-condition .

Configuring the Native Data Source Path for Routing Information

You can configure the native data source path for routing information, which sends information about all routes that are contained in the URIB. When you subscribe, the baseline sends all the route information. After the baseline, notifications are sent for route update and delete operations for the routing protocols that the switch supports. For the data sent in the RIB notifications, see Telemetry Data Streamed for Native Data Source Paths.

Before you begin

If you have not enabled the telemetry feature, enable it now (feature telemetry ).

SUMMARY STEPS

  1. configure terminal
  2. telemetry
  3. sensor-group sgrp_id
  4. data-source native
  5. path rib query-condition [data=ephemeral | updates_only]
  6. destination-group grp_id
  7. ip address ip_addr port port protocol { HTTP | gRPC } encoding { JSON | GPB | GPB-compact }
  8. subscription sub_id
  9. snsr-group sgrp_id sample-interval interval
  10. dst-group dgrp_id

DETAILED STEPS

  Command or Action Purpose

Step 1

configure terminal

Example:

switch-1# configure terminal
switch-1(config)#

Enter configuration mode.

Step 2

telemetry

Example:

switch-1(config)# telemetry
switch-1(config-telemetry)#

Enter configuration mode for the telemetry features.

Step 3

sensor-group sgrp_id

Example:

switch-1(conf-tm-sub)# sensor-grp 6 
switch-1(conf-tm-sub)#

Create a sensor group.

Step 4

data-source native

Example:

switch-1(conf-tm-sensor)# data-source native 
switch-1(conf-tm-sensor)#

Set the data source to native so that any native application can use the streamed data without requiring a specific model or database.

Step 5

path rib query-condition [data=ephemeral | updates_only]

Example:

nxosv2(conf-tm-sensor)# path rib 
nxosv2(conf-tm-sensor)#

Configure the RIB path which streams routes and route update information.

Step 6

destination-group grp_id

Example:

switch-1(conf-tm-sensor)# destination-group 33
switch-1(conf-tm-dest)#
Enter telemetry destination group submode and configure the destination group.

Step 7

ip address ip_addr port port protocol { HTTP | gRPC } encoding { JSON | GPB | GPB-compact }

Example:

switch-1(conf-tm-dest)# ip address 192.0.2.11 port 50001 protocol http encoding json
switch-1(conf-tm-dest)#

Example:

switch-1(conf-tm-dest)# ip address 192.0.2.11 port 50001 protocol grpc encoding gpb
switch-1(conf-tm-dest)#

Example:

switch-1(conf-tm-dest)# ip address 192.0.2.11 port 50001 protocol grpc encoding gpb-compact
switch-1(conf-tm-dest)#
Configure the telemetry data for the subscription to stream to the specified IP address and port and set the protocol and encoding for the data stream.

Step 8

subscription sub_id

Example:

switch-1(conf-tm-dest)# subscription 33
switch-1(conf-tm-sub)#
Enter telemetry subscription submode, and configure the telemetry subscription.

Step 9

snsr-group sgrp_id sample-interval interval

Example:

switch-1(conf-tm-sub)# snsr-grp 6 sample-interval 5000 
switch-1(conf-tm-sub)#

Link the sensor group to the current subscription and set the data sampling interval in milliseconds. The sampling interval determines whether the switch sends telemetry data periodically, or when rib events occur.

Step 10

dst-group dgrp_id

Example:

switch-1(conf-tm-sub)# dst-grp 33 
switch-1(conf-tm-sub)#

Link the destination group to the current subscription. The destination group that you specify must match the destination group that you configured in the destination-group command.

Configuring the Native Data Source Path for MAC Information

You can configure the native data source path for MAC information, which sends information about all entries in the MAC table. When you subscribe, the baseline sends all the MAC information. After the baseline, notifications are sent for add, update, and delete MAC address operations. For the data sent in the MAC notifications, see Telemetry Data Streamed for Native Data Source Paths.


Note

For update or delete events, MAC notifications are sent only for the MAC addresses that have IP adjacencies.

Before you begin

If you have not enabled the telemetry feature, enable it now (feature telemetry ).

SUMMARY STEPS

  1. configure terminal
  2. telemetry
  3. sensor-group sgrp_id
  4. data-source native
  5. path mac
  6. destination-group grp_id
  7. ip address ip_addr port port protocol { HTTP | gRPC } encoding { JSON | GPB | GPB-compact }
  8. subscription sub_id
  9. snsr-group sgrp_id sample-interval interval
  10. dst-group dgrp_id

DETAILED STEPS

  Command or Action Purpose

Step 1

configure terminal

Example:

switch-1# configure terminal
switch-1(config)#

Enter configuration mode.

Step 2

telemetry

Example:

switch-1(config)# telemetry
switch-1(config-telemetry)#

Enter configuration mode for the telemetry features.

Step 3

sensor-group sgrp_id

Example:

switch-1(conf-tm-sub)# sensor-grp 6 
switch-1(conf-tm-sub)#

Create a sensor group.

Step 4

data-source native

Example:

switch-1(conf-tm-sensor)# data-source native
switch-1(conf-tm-sensor)#

Set the data source to native so that any native application can use the streamed data without requiring a specific model or database.

Step 5

path mac

Example:

nxosv2(conf-tm-sensor)# path mac 
nxosv2(conf-tm-sensor)#

Configure the MAC path which streams information about MAC entries and MAC notifications.

Step 6

destination-group grp_id

Example:

switch-1(conf-tm-sensor)# destination-group 33
switch-1(conf-tm-dest)#
Enter telemetry destination group submode and configure the destination group.

Step 7

ip address ip_addr port port protocol { HTTP | gRPC } encoding { JSON | GPB | GPB-compact }

Example:

switch-1(conf-tm-dest)# ip address 192.0.2.11 port 50001 protocol http encoding json
switch-1(conf-tm-dest)#

Example:

switch-1(conf-tm-dest)# ip address 192.0.2.11 port 50001 protocol grpc encoding gpb
switch-1(conf-tm-dest)#

Example:

switch-1(conf-tm-dest)# ip address 192.0.2.11 port 50001 protocol grpc encoding gpb-compact
switch-1(conf-tm-dest)#
Configure the telemetry data for the subscription to stream to the specified IP address and port and set the protocol and encoding for the data stream.

Step 8

subscription sub_id

Example:

switch-1(conf-tm-dest)# subscription 33
switch-1(conf-tm-sub)#
Enter telemetry subscription submode, and configure the telemetry subscription.

Step 9

snsr-group sgrp_id sample-interval interval

Example:

switch-1(conf-tm-sub)# snsr-grp 6 sample-interval 5000 
switch-1(conf-tm-sub)#

Link the sensor group to the current subscription and set the data sampling interval in milliseconds. The sampling interval determines whether the switch sends telemetry data periodically, or when interface events occur.

Step 10

dst-group dgrp_id

Example:

switch-1(conf-tm-sub)# dst-grp 33 
switch-1(conf-tm-sub)#

Link the destination group to the current subscription. The destination group that you specify must match the destination group that you configured in the destination-group command.

Configuring the Native Data Source Path for All MAC Information

You can configure the native data source path for MAC information, which sends information about all entries in the MAC table from Layer 3 and Layer 2. When you subscribe, the baseline sends all the MAC information. After the baseline, notifications are sent for add, update, and delete MAC address operations. For the data sent in the MAC notifications, see Telemetry Data Streamed for Native Data Source Paths.


Note

For update or delete events, MAC notifications are sent only for the MAC addresses that have IP adjacencies.

Before you begin

If you have not enabled the telemetry feature, enable it now (feature telemetry ).

SUMMARY STEPS

  1. configure terminal
  2. telemetry
  3. sensor-group sgrp_id
  4. data-source native
  5. path mac-all
  6. destination-group grp_id
  7. ip address ip_addr port port protocol { HTTP | gRPC } encoding { JSON | GPB | GPB-compact }
  8. subscription sub_id
  9. snsr-group sgrp_id sample-interval interval
  10. dst-group dgrp_id

DETAILED STEPS

  Command or Action Purpose

Step 1

configure terminal

Example:

switch-1# configure terminal
switch-1(config)#

Enter configuration mode.

Step 2

telemetry

Example:

switch-1(config)# telemetry
switch-1(config-telemetry)#

Enter configuration mode for the telemetry features.

Step 3

sensor-group sgrp_id

Example:

switch-1(conf-tm-sub)# sensor-grp 6 
switch-1(conf-tm-sub)#

Create a sensor group.

Step 4

data-source native

Example:

switch-1(conf-tm-sensor)# data-source native
switch-1(conf-tm-sensor)#

Set the data source to native so that any native application can use the streamed data without requiring a specific model or database.

Step 5

path mac-all

Example:

nxosv2(conf-tm-sensor)# path mac-all 
nxosv2(conf-tm-sensor)#

Configure the MAC path which streams information about all MAC entries and MAC notifications.

Step 6

destination-group grp_id

Example:

switch-1(conf-tm-sensor)# destination-group 33
switch-1(conf-tm-dest)#
Enter telemetry destination group submode and configure the destination group.

Step 7

ip address ip_addr port port protocol { HTTP | gRPC } encoding { JSON | GPB | GPB-compact }

Example:

switch-1(conf-tm-dest)# ip address 192.0.2.11 port 50001 protocol http encoding json
switch-1(conf-tm-dest)#

Example:

switch-1(conf-tm-dest)# ip address 192.0.2.11 port 50001 protocol grpc encoding gpb
switch-1(conf-tm-dest)#

Example:

switch-1(conf-tm-dest)# ip address 192.0.2.11 port 50001 protocol grpc encoding gpb-compact
switch-1(conf-tm-dest)#
Configure the telemetry data for the subscription to stream to the specified IP address and port and set the protocol and encoding for the data stream.

Step 8

subscription sub_id

Example:

switch-1(conf-tm-dest)# subscription 33
switch-1(conf-tm-sub)#
Enter telemetry subscription submode, and configure the telemetry subscription.

Step 9

snsr-group sgrp_id sample-interval interval

Example:

switch-1(conf-tm-sub)# snsr-grp 6 sample-interval 5000 
switch-1(conf-tm-sub)#

Link the sensor group to the current subscription and set the data sampling interval in milliseconds. The sampling interval determines whether the switch sends telemetry data periodically, or when interface events occur.

Step 10

dst-group dgrp_id

Example:

switch-1(conf-tm-sub)# dst-grp 33 
switch-1(conf-tm-sub)#

Link the destination group to the current subscription. The destination group that you specify must match the destination group that you configured in the destination-group command.

Configuring the Native Data Path for IP Adjacencies

You can configure the native data source path for IP adjacency information, which sends information about all IPv4 and IPv6 adjacencies for the switch. When you subscribe, the baseline sends all the adjacencies. After the baseline, notifications are sent for add, update, and delete adjacency operations. For the data sent in the adjacency notifications, see Telemetry Data Streamed for Native Data Source Paths.

Before you begin

If you have not enabled the telemetry feature, enable it now (feature telemetry ).

SUMMARY STEPS

  1. configure terminal
  2. telemetry
  3. sensor-group sgrp_id
  4. data-source native
  5. path adjacency
  6. destination-group grp_id
  7. ip address ip_addr port port protocol { HTTP | gRPC } encoding { JSON | GPB | GPB-compact }
  8. subscription sub_id
  9. snsr-group sgrp_id sample-interval interval
  10. dst-group dgrp_id

DETAILED STEPS

  Command or Action Purpose

Step 1

configure terminal

Example:

switch-1# configure terminal
switch-1(config)#

Enter configuration mode.

Step 2

telemetry

Example:

switch-1(config)# telemetry
switch-1(config-telemetry)#

Enter configuration mode for the telemetry features.

Step 3

sensor-group sgrp_id

Example:

switch-1(conf-tm-sub)# sensor-grp 6 
switch-1(conf-tm-sub)#

Create a sensor group.

Step 4

data-source native

Example:

switch-1(conf-tm-sensor)# data-source native
switch-1(conf-tm-sensor)#

Set the data source to native so that any native application can use the streamed data.

Step 5

path adjacency

Example:

nxosv2(conf-tm-sensor)# path adjacency 
nxosv2(conf-tm-sensor)#

Configure the Adjacency path which streams information about the IPv4 and IPv6 adjacencies.

Step 6

destination-group grp_id

Example:

switch-1(conf-tm-sensor)# destination-group 33
switch-1(conf-tm-dest)#
Enter telemetry destination group submode and configure the destination group.

Step 7

ip address ip_addr port port protocol { HTTP | gRPC } encoding { JSON | GPB | GPB-compact }

Example:

switch-1(conf-tm-dest)# ip address 192.0.2.11 port 50001 protocol http encoding json
switch-1(conf-tm-dest)#

Example:

switch-1(conf-tm-dest)# ip address 192.0.2.11 port 50001 protocol grpc encoding gpb
switch-1(conf-tm-dest)#

Example:

switch-1(conf-tm-dest)# ip address 192.0.2.11 port 50001 protocol grpc encoding gpb-compact
switch-1(conf-tm-dest)#
Configure the telemetry data for the subscription to stream to the specified IP address and port and set the protocol and encoding for the data stream.

Step 8

subscription sub_id

Example:

switch-1(conf-tm-dest)# subscription 33
switch-1(conf-tm-sub)#
Enter telemetry subscription submode, and configure the telemetry subscription.

Step 9

snsr-group sgrp_id sample-interval interval

Example:

switch-1(conf-tm-sub)# snsr-grp 6 sample-interval 5000 
switch-1(conf-tm-sub)#

Link the sensor group to the current subscription and set the data sampling interval in milliseconds. The sampling interval determines whether the switch sends telemetry data periodically, or when interface events occur.

Step 10

dst-group dgrp_id

Example:

switch-1(conf-tm-sub)# dst-grp 33 
switch-1(conf-tm-sub)#

Link the destination group to the current subscription. The destination group that you specify must match the destination group that you configured in the destination-group command.

Displaying Native Data Source Path Information

Use the NX-OS show telemetry event collector commands to display statistics and counters, or errors for the native data source path.

Displaying Statistics

You can issue show telemetry event collector stats command to display the statistics and counters for each native data source path.

An example of statistics for the RIB path:
switch-1# show telemetry event collector stats
 
--------------------------------------------------------------------------------
Row ID         Collection Count  Latest Collection Time     Sensor Path(GroupId)
--------------------------------------------------------------------------------
1              4                 Mon Jul 01 13:53:42.384 PST rib(1)
switch-1#
An example of the statistics for the MAC path:
switch-1# show telemetry event collector stats
 
--------------------------------------------------------------------------------
Row ID         Collection Count  Latest Collection Time     Sensor Path(GroupId)
--------------------------------------------------------------------------------
1              3                 Mon Jul 01 14:01:32.161 PST mac(1)
switch-1#
An example of the statistics for the Adjacency path:
switch-1# show telemetry event collector stats
 
--------------------------------------------------------------------------------
Row ID         Collection Count  Latest Collection Time     Sensor Path(GroupId)
--------------------------------------------------------------------------------
1              7                 Mon Jul 01 14:47:32.260 PST adjacency(1)
switch-1#

Displaying Error Counters

You can use the show telemetry event collector stats command to display the error totals for all the native data source paths.
switch-1# show telemetry event collector errors

-------------------------------------------------------------------------------
-
Error Description                                  Error Count 
-------------------------------------------------------------------------------
-
Dme Event Subscription Init Failures               - 0
Event Data Enqueue Failures                        - 0
Event Subscription Failures                        - 0
Pending Subscription List Create Failures          - 0
Subscription Hash Table Create Failures            - 0
Subscription Hash Table Destroy Failures           - 0
Subscription Hash Table Insert Failures            - 0
Subscription Hash Table Remove Failures            - 0
switch-1#

Streaming Syslog

About Streaming Syslog for Telemetry

Beginning with Cisco NX-OS release 9.3(3), model-driven telemetry supports streaming of syslogs using YANG as a data source. When you create a subscription, all the syslogs are streamed to the receiver as a baseline. This feature works with the NX-SDK to support streaming syslog data from the following syslog paths:

  • Cisco-NX-OS-Syslog-oper:syslog

  • Cisco-NX-OS-Syslog-oper:syslog/messages

After the baseline, only syslog event notifications stream to the receiver. Streaming of syslog paths supports the following encoding types:

  • Google Protobuf (GPB)

  • JavaScript Object Notation (JSON)

Configuring the Native Data Source Path for Routing Information

You can configure the native data source path for routing information, which sends information about all routes that are contained in the URIB. When you subscribe, the baseline sends all the route information. After the baseline, notifications are sent for route update and delete operations for the routing protocols that the switch supports. For the data sent in the RIB notifications, see Telemetry Data Streamed for Native Data Source Paths.

Before you begin

If you have not enabled the telemetry feature, enable it now (feature telemetry ).

SUMMARY STEPS

  1. configure terminal
  2. telemetry
  3. sensor-group sgrp_id
  4. data-source native
  5. path rib query-condition [data=ephemeral | updates_only]
  6. destination-group grp_id
  7. ip address ip_addr port port protocol { HTTP | gRPC } encoding { JSON | GPB | GPB-compact }
  8. subscription sub_id
  9. snsr-group sgrp_id sample-interval interval
  10. dst-group dgrp_id

DETAILED STEPS

  Command or Action Purpose

Step 1

configure terminal

Example:

switch-1# configure terminal
switch-1(config)#

Enter configuration mode.

Step 2

telemetry

Example:

switch-1(config)# telemetry
switch-1(config-telemetry)#

Enter configuration mode for the telemetry features.

Step 3

sensor-group sgrp_id

Example:

switch-1(conf-tm-sub)# sensor-grp 6 
switch-1(conf-tm-sub)#

Create a sensor group.

Step 4

data-source native

Example:

switch-1(conf-tm-sensor)# data-source native 
switch-1(conf-tm-sensor)#

Set the data source to native so that any native application can use the streamed data without requiring a specific model or database.

Step 5

path rib query-condition [data=ephemeral | updates_only]

Example:

nxosv2(conf-tm-sensor)# path rib 
nxosv2(conf-tm-sensor)#

Configure the RIB path which streams routes and route update information.

Step 6

destination-group grp_id

Example:

switch-1(conf-tm-sensor)# destination-group 33
switch-1(conf-tm-dest)#
Enter telemetry destination group submode and configure the destination group.

Step 7

ip address ip_addr port port protocol { HTTP | gRPC } encoding { JSON | GPB | GPB-compact }

Example:

switch-1(conf-tm-dest)# ip address 192.0.2.11 port 50001 protocol http encoding json
switch-1(conf-tm-dest)#

Example:

switch-1(conf-tm-dest)# ip address 192.0.2.11 port 50001 protocol grpc encoding gpb
switch-1(conf-tm-dest)#

Example:

switch-1(conf-tm-dest)# ip address 192.0.2.11 port 50001 protocol grpc encoding gpb-compact
switch-1(conf-tm-dest)#
Configure the telemetry data for the subscription to stream to the specified IP address and port and set the protocol and encoding for the data stream.

Step 8

subscription sub_id

Example:

switch-1(conf-tm-dest)# subscription 33
switch-1(conf-tm-sub)#
Enter telemetry subscription submode, and configure the telemetry subscription.

Step 9

snsr-group sgrp_id sample-interval interval

Example:

switch-1(conf-tm-sub)# snsr-grp 6 sample-interval 5000 
switch-1(conf-tm-sub)#

Link the sensor group to the current subscription and set the data sampling interval in milliseconds. The sampling interval determines whether the switch sends telemetry data periodically, or when rib events occur.

Step 10

dst-group dgrp_id

Example:

switch-1(conf-tm-sub)# dst-grp 33 
switch-1(conf-tm-sub)#

Link the destination group to the current subscription. The destination group that you specify must match the destination group that you configured in the destination-group command.

Telemetry Data Streamed for Syslog Path

For each source path, the following table shows the information that is streamed when the subscription is first created "the baseline" and when event notifications occur.

Path

Subscription Baseline

Event Notification

Cisco-NX-OS-Syslog-oper:syslog/messages

Stream all the existing syslogs from the switch.

Sends event notification for syslog occurred on the switch:

  • message-id

  • node-name

  • time-stamp

  • time-of-day

  • time-zone

  • category

  • message-name

  • severity

  • text

Displaying Syslog Path Information

Use the Cisco NX-OS show telemetry event collector commands to display statistics and counters, or errors for the syslog path.

Displaying Statistics

You can enter the show telemetry event collector stats command to display the statistics and counters for each syslog path.

The following is an example of statistics for the syslog path:

switch# show telemetry event collector stats 

-------------------------------------------------------------------------------- 
Row ID         Collection Count  Latest Collection Time     Sensor Path(GroupId) 
-------------------------------------------------------------------------------- 
1              138               Tue Dec 03 11:20:08.200 PST Cisco-NX-OS-Syslog-oper:syslog(1) 
2              138               Tue Dec 03 11:20:08.200 PST Cisco-NX-OS-Syslog-oper:syslog/messages(1)

Displaying Error Counters

You can use the show telemetry event collector errors command to display the error totals for all the syslog paths. 

switch(config-if)# show telemetry event collector errors 

-------------------------------------------------------------------------------- 
Error Description                                  Error Count 
-------------------------------------------------------------------------------- 
Dme Event Subscription Init Failures                       - 0 
Event Data Enqueue Failures                                - 0 
Event Subscription Failures                                - 0 
Pending Subscription List Create Failures                  - 0 
Subscription Hash Table Create Failures                    - 0 
Subscription Hash Table Destroy Failures                   - 0 
Subscription Hash Table Insert Failures                    - 0 
Subscription Hash Table Remove Failures                    - 0

Sample JSON Output

The following is a sample of JSON output: 


172.19.216.13 - - [03/Dec/2019 19:38:50] "POST /network/Cisco-NX-OS-Syslog-oper%3Asyslog%2Fmessages HTTP/1.0" 200 - 
172.19.216.13 - - [03/Dec/2019 19:38:50] "POST /network/Cisco-NX-OS-Syslog-oper%3Asyslog%2Fmessages HTTP/1.0" 200 - 
>>> URL            : /network/Cisco-NX-OS-Syslog-oper%3Asyslog%2Fmessages 
>>> TM-HTTP-VER    : 1.0.0 
>>> TM-HTTP-CNT    : 1 
>>> Content-Type   : application/json 
>>> Content-Length : 578 
    Path => Cisco-NX-OS-Syslog-oper:syslog/messages 
            node_id_str   : task-n9k-1 
            collection_id : 40 
            data_source   : YANG 
            data          : 
[ 
  [ 
    { 
      "message-id": 420 
    }, 
    { 
      "category": "ETHPORT", 
      "group": "ETHPORT", 
      "message-name": "IF_UP", 
      "node-name": "task-n9k-1", 
      "severity": 5, 
      "text": "Interface loopback10 is up ", 
      "time-of-day": "Dec 3 2019 11:38:51", 
      "time-stamp": "1575401931000", 
      "time-zone": "" 
    } 
  ] 
]

Sample KVGPB Output

The following is a sample KVGPB output. 

KVGPB Output:
---Telemetry msg received @ 18:22:04 UTC
 
Read frag:1 size:339 continue to block on read..
 
All the fragments:1 read successfully total size read:339
 
node_id_str: "task-n9k-1"
 
subscription_id_str: "1"
 
collection_id: 374
 
data_gpbkv {
 
  fields {
 
    name: "keys"
 
    fields {
 
      name: "message-id"
 
      uint32_value: 374
 
    }
 
  }
 
  fields {
 
    name: "content"
 
    fields {
 
      fields {
 
        name: "node-name"
 
        string_value: "task-n9k-1"
 
      }
 
      fields {
 
        name: "time-of-day"
 
        string_value: "Jun 26 2019 18:20:21"
 
      }
 
      fields {
 
        name: "time-stamp"
 
        uint64_value: 1574293838000
 
      }
 
      fields {
 
        name: "time-zone"
 
        string_value: "UTC"
 
      }
 
      fields {
 
        name: "process-name"
 
        string_value: ""
 
      }
 
      fields {
 
        name: "category"
 
        string_value: "VSHD"
 
      }
 
      fields {
 
        name: "group"
 
        string_value: "VSHD"
 
      }
 
      fields {
 
        name: "message-name"
 
        string_value: "VSHD_SYSLOG_CONFIG_I"
 
      }
 
      fields {
 
        name: "severity"
 
        uint32_value: 5
 
      }
 
      fields {
 
        name: "text"
 
        string_value: "Configured from vty by admin on console0"
 
      }
 
    }
 
  }
 
}