Enable segment routing for routers and configure traffic collector on devices to make sure there is traffic in the system.
Check for prefix and tunnel traffic on the routers using the following commands:
Prefix Traffic:
sh traffic-collector ipv4 counters prefix <prefix-name>
Tunnel Traffic:
show traffic-collector ipv4 counters tunnels <tunnel-name>
| Step 1 |
Configure the WAE Telemetry Agent.
admin@wae(config)# wae agents telemetry-agent ports <port-number1> <port-number2> <port-numberxx>
admin@wae(config)# commit
| Note
|
The ports that the agent will use to receive telemetry information must be available on the WAE machine.
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| Step 2 |
Configure telemetry on devices to send Key-Value Google Protocol Buffers (KV-GPB) encoded telemetry on ports using TCP that
will be used for WAE. Three attributes must be defined on the router: sensor-group, destination-group, and the subscription.
For information on how to do this, see the “Configure Model-driven Telemetry” chapter in the Cisco IOS XR Telemetry Configuration Guide. Examples are provided at the end of this procedure.
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| Step 3 |
Configure the sr-traffic-matrix-nimo. For more information, see Segment Routing Traffic Matrix Collection.
admin@wae(config)# networks network <network-model-name> nimo sr-traffic-matrix-nimo source-network <source-network> collection-period <collection-period-in-seconds>
collection-period configuration is enabled by default and is set to 60 sec.
The options available are:
admin@wae(config)# networks network srt nimo sr-traffic-matrix-nimo ?
Possible completions:
advanced
collection-period Frequency in seconds for automatic periodic generation of demands ('0' value disables periodic demand generation).
source-network Source network for this network to use.
<cr>
admin@wae(config)# networks network srt nimo sr-traffic-matrix-nimo advanced ?
Possible completions:
action-timeout Specifies the timeout value (in minutes) for running actions - default of '0' specifies the system default.
copy-network When set to 'true', copies the source network into this NIMO network and create demands in the new model.
telemetry-agent-callback Callback for telemetry-agent to inform sr-traffic-matrix-nimo about new telemetry data.
telemetry-agent-callback is not an configuration option and it is an action used by Telemetry Agent internally.
| Note
|
For SR policy (XTC-nimo), use-signaled-name property in the source network has to be set to true (by default it is true) while performing collection.
For RSVP LSP tunnels (lsp-snmp-nimo), use-signaled-name property in the source network has to be set to false (by default it is false) while performing LSP collection.
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| Step 4 |
Run the sr-traffic-matrix-nimo collection to generate demands.
admin@wae# networks network <network-model-name> nimo sr-traffic-matrix-nimo run-collection
By default, demands are generated by using locally cached information. However, if you want demands to be generated using
the raw telemetry data from the WAE Telemetry agent, you must set the use-cache option to false. For example:
admin@wae# networks network <network-model-name> nimo sr-traffic-matrix-nimo run-collection use-cache false
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1. Configure the WAE Telemetry Agent
admin@wae# config terminal
Entering configuration mode terminal
admin@wae(config)# wae agents telemetry-agent ports 1624
admin@wae(config)# commit
2. Configure the router to send telemetry data to WAE:
a. Define sensor-group
telemetry model-driven
sensor-group SRTM
sensor-path Cisco-IOS-XR-infra-tc-oper:traffic-collector/afs/af/counters/tunnels
sensor-path Cisco-IOS-XR-infra-tc-oper:traffic-collector/vrf-table/default-vrf/afs/af/counters
!
!
b. Define destination-group
telemetry model-driven
destination-group my_workstation
address-family ipv4 10.152.130.41 port 1624
encoding self-describing-gpb
protocol tcp
!
Note |
The ip-address and port from the above example must be the same as the one configured previously in WAE telementry agent.
|
c. Define subscription
telemetry model-driven
subscription ABC
sensor-group-id SRTM sample-interval 5000
destination-id my_workstation
!
!
3. Configure the SR LSP Traffic Matrix NIMO (sr-traffic-matrix-nimo)
admin@wae# config terminal
Entering configuration mode terminal
admin@wae(config)# networks network srtm nimo sr-traffic-matrix-nimo source-network igp collection-period 50s
admin@wae(config)# commit
To view connections between WAE and the router, use the shell CLI netstat command. For example:
# netstat -an | grep :1624 | grep ESTABLISHED
tcp 0 28 10.10.10.10:1624 10.152.130.41:61092 ESTABLISHED
where 10.10.10.10 is the address of the WAE machine and 10.152.130.41 is the address of the connected router.
4. Run the sr-traffic-matrix-nimo collection to generate demands.
admin@wae# networks network srtm nimo sr-traffic-matrix-nimo run-collection
status true
message Succeeded: Retrieved 12 SR demands from network srtm
admin@wae# show running-config networks network srtm model demands | nomore
networks network igp
model demands demand "PE1|PE2|default"
source node node-name PE1
destination node node-name PE2
service-class-name default
traffic 22.203833
!
.......
!
model demands demand "PE4|PE3|default"
source node node-name PE4
destination node node-name PE3
service-class-name default
traffic 22.202989
!
!
admin@wae#
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