- Finding Feature Information
- Prerequisites for Periodic MIB Data Collection and Transfer Mechanism
- Restrictions for Periodic MIB Data Collection and Transfer Mechanism
- Information About Periodic MIB Data Collection and Transfer Mechanism
- How to Configure Periodic MIB Data Collection and Transfer Mechanism
- Configuration Examples for Periodic MIB Data Collection and Transfer Mechanism
Periodic MIB Data Collection and Transfer Mechanism
This document describes how to periodically transfer selected MIB data from Cisco IOS-based devices to specified Network Management Systems (NMS).
- Finding Feature Information
- Prerequisites for Periodic MIB Data Collection and Transfer Mechanism
- Restrictions for Periodic MIB Data Collection and Transfer Mechanism
- Information About Periodic MIB Data Collection and Transfer Mechanism
- How to Configure Periodic MIB Data Collection and Transfer Mechanism
- Configuration Examples for Periodic MIB Data Collection and Transfer Mechanism
- Additional References
- Feature Information for Periodic MIB Data Collection and Transfer Mechanism
Finding Feature Information
Your software release may not support all the features documented in this module. For the latest feature information and caveats, see the release notes for your platform and software release. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the Feature Information Table at the end of this document.
Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/go/cfn. An account on Cisco.com is not required.
Prerequisites for Periodic MIB Data Collection and Transfer Mechanism
To use this feature, you should be familiar with the Simple Network Management Protocol (SNMP) model of management information. You should also know what MIB information you want to monitor on your network devices, and the OIDs or object names for the MIB objects to be monitored.
Restrictions for Periodic MIB Data Collection and Transfer Mechanism
Cisco Data Collection MIB configuration using SNMP is not currently implemented.
For specific restrictions, see the tasks in the How to Configure Periodic MIB Data Collection and Transfer Mechanism.
Information About Periodic MIB Data Collection and Transfer Mechanism
Note |
In the Cisco IOS CLI, the Periodic MIB Data Collection and Transfer Mechanism is referred to as the Bulk Statistics feature. |
- SNMP Objects and Instances
- Bulk Statistics Object Lists
- Bulk Statistics Schemas
- Bulk Statistics Transfer Options
- Benefits of the Periodic MIB Data Collection and Transfer Mechanism
SNMP Objects and Instances
A type (or class) of SNMP management information is called an object. A specific instance from a type of management information is called an object instance (or SNMP variable). To configure a bulk statistics collection, you must specify the object types to be monitored using a bulk statistics object list and the specific instances of those objects to be collected using a bulk statistics schema.
MIBs, MIB tables, MIB objects, and object indices can all be specified using a series of numbers called an object identifier (OID). OIDs are used in configuring a bulk statistics collection in both the bulk statistics object lists (for general objects) and in the bulk statistics schemas (for specific object instances).
Bulk Statistics Object Lists
To group the MIB objects to be polled, you will need to create one or more object lists. A bulk statistics object list is a user-specified set of MIB objects that share the same MIB index. Object lists are identified using a name that you specify. Named bulk statistics object lists allow the same configuration to be reused in different bulk statistics schemas.
All the objects in an object list must share the same MIB index. However, the objects do not need to be in the same MIB and do not need to belong to the same MIB table. For example, it is possible to group ifInOctets and an Ethernet MIB object in the same schema, because the containing tables for both objects are indexed by the ifIndex.
Bulk Statistics Schemas
Data selection for the Periodic MIB Data Collection and Transfer Mechanism requires the definition of a schema with the following information:
- Name of an object list.
- Instance (specific or wildcarded) that needs to be retrieved for objects in above object list.
- How often the specified instances need to be sampled (polling interval).
A bulk statistics schema is also identified using a name that you specify. This name is used when configuring the transfer options.
Bulk Statistics Transfer Options
After configuring the data to be collected, a single virtual file (VFile or “bulk statistics file”) with all collected data is created. This file can be transferred to a network management station (NMS) using FTP, rcp, or TFTP. You can specify how often this file should be transferred. The default transfer interval is once every 30 minutes. You can also configure a secondary destination for the file to be used if, for whatever reason, the file cannot be transferred to the primary network management station.
The value of the transfer interval is also the collection period (collection interval) for the local bulk statistics file. After the collection period ends, the bulk statistics file is frozen, and a new local bulk statistics file is created for storing data. The frozen bulk statistics file is then transferred to the specified destination.
By default, the local bulk statistics file is deleted after successful transfer to an NMS. However, you can configure the routing device to keep the bulk statistics file in memory for a specified amount of time.
An SNMP notification (trap) can be sent to the NMS if a transfer to the primary or secondary NMS is not successful. Additionally, a syslog message will be logged on the local device if transfers are unsuccessful.
Benefits of the Periodic MIB Data Collection and Transfer Mechanism
The Periodic MIB Data Collection and Transfer Mechanism (Bulk Statistics feature) allows many of the same functions as the Bulk File MIB (CISCO-BULK-FILE-MIB.my), but offers some key advantages.
The main advantage is that this feature can be configured through the CLI and does not require an external monitoring application.
The Periodic MIB Data Collection and Transfer Mechanism is mainly targeted for medium to high-end platforms that have sufficient local storage (volatile or permanent) to store bulk statistics files. Locally storing bulk statistics files helps minimize loss of data during temporary network outages.
This feature also has more powerful data selection features than the Bulkfile MIB; it allows grouping of MIB objects from different tables into data groups (object lists). It also incorporates a more flexible instance selection mechanism, where the application is not restricted to fetching an entire MIB table.
How to Configure Periodic MIB Data Collection and Transfer Mechanism
- Configuring a Bulk Statistics Object List
- Configuring a Bulk Statistics Schema
- Configuring a Bulk Statistics Transfer Options
- Enabling Monitoring for Bulk Statistics Collection
- Monitoring and Troubleshooting Periodic MIB Data Collection and Transfer Mechanism
Configuring a Bulk Statistics Object List
The first step in configuring the Periodic MIB Data Collection and Transfer Mechanism is to configure one or more object lists.
Note |
All the objects in a bulk statistics object list have to be indexed by the same MIB index. However, the objects in the object list do not need to belong to the same MIB or MIB table. When specifying an object name instead of an OID (using the add command), only object names from the Interfaces MIB (IF-MIB.my), Cisco Committed Access Rate MIB (CISCO-CAR-MIB.my) and the MPLS Traffic Engineering MIB (MPLS-TE-MIB.my) may be used. > |
DETAILED STEPS
Configuring a Bulk Statistics Schema
The next step in configuring the Periodic MIB Data Collection and Transfer Mechanism is to configure one or more schemas.
The bulk statistics object list to be used in the schema must be defined.
Note |
Only one object list can be associated with a schema at a time. > |
- instance {exact | wild} {interface interface-id [sub-if] | controller controller-id [sub-if] | oid oid}
DETAILED STEPS
Configuring a Bulk Statistics Transfer Options
The final step in configuring the Periodic MIB Data Collection and Transfer Mechanism is to configure the transfer options. The collected MIB data are kept in a local file-like entity called a VFile (virtual file, referred to as a bulk statistics file in this document). This file can be transferred to a remote network management station (NMS) at intervals you specify.
The bulk statistics object lists and bulk statistics schemas should be defined before configuring the bulk statistics transfer options.
Note |
Transfers can only be performed using schemaASCII (cdcSchemaASCII) format. SchemaASCII is an ASCII format that contains parser-friendly hints for parsing data values. > |
DETAILED STEPS
Troubleshooting Tips
If the maximum buffer size for a bulk statistics file is reached before the transfer interval time expires, the transfer operation will still be initiated, and bulk statistics data will be collected into a new file in the system buffer. To correct this behavior, you can decrease the polling frequency, or increase the size of the bulk statistics buffer. If retain 0 is configured, no retries will be attempted. This is because the interval between retries is the retain value divided by the retry value. For example, if retain 10 and retry 2 are configured, retries will be attempted once every 5 minutes. Therefore, if you configure the retry command, you should also configure an appropriate value for the retain command.
Enabling Monitoring for Bulk Statistics Collection
Optionally, you can enable SNMP notifications to be sent, which provide information on the transfer status of the Periodic MIB Data Collection and Transfer Mechanism (Bulk Statistics feature).
DETAILED STEPS
Command or Action | Purpose | |
---|---|---|
|
Example: Router# configure terminal |
Enters global configuration mode. |
|
Example: Router(config)# snmp-server community public |
Specifies the SNMP community and access options for the device. |
|
Example: Router(config)# snmp-server enable traps bulkstat |
Enables the sending of bulk statistics SNMP notifications (traps or informs). The following notifications (defined in the CISCO-DATA-COLLECTION-MIB) are enabled with this command:
|
|
Example: Router(config)# snmp-server host informs public bulkstat |
Specifies the recipient (host) for the SNMP notifications, and additional transfer options. |
|
Example:
Example: Router(config)# do copy running-config startup-config |
(Optional) Saves the current configuration to NVRAM as the startup configuration file.
|
Monitoring and Troubleshooting Periodic MIB Data Collection and Transfer Mechanism
The show command for this feature displays the status of the bulk statistics processes. The debug command enables the standard set of debugging messages for technical support purposes.
DETAILED STEPS
Command or Action | Purpose | |||
---|---|---|---|---|
|
Example: Router# show snmp mib bulkstat transfer Example:
Example: Transfer Name : ifmib Example: Retained files Example:
Example: File Name : Time Left (in seconds) :STATE Example: ----------------------------------------------------- Example: ifmib_Router_020421_100554683 : 173 : Retry (2 Retry attempt(s) Left) Example:
Example: ifmib_Router_020421_100554683 : 53 : Retained |
(Optional) The show command for this feature lists all bulk statistics virtual files (VFiles) on the system that have finished collecting data. (Data files that are not complete are not displayed.) The output lists all of the completed local bulk statistics files, the remaining time left before the bulk statistics file is deleted (remaining retention period), and the state of the bulk statistics file. The “STATE” of the bulk statistics file will be one of the following:
To display only the status of a named transfer (as opposed to all configured transfers), specify the name of the transfer in the transfer-name argument. |
||
|
Example: Router# debug snmp bulkstat |
(Optional) Enables standard debugging output for the Bulk Statistics feature. Debugging output includes messages about the creation, transfer, and deletion of bulk statistics files. |
Configuration Examples for Periodic MIB Data Collection and Transfer Mechanism
Example Configuring Periodic MIB Data Collection and Transfer Mechanism
This section provides a complete example of configuring the Periodic MIB Data Collection and Transfer Mechanism (Bulk Statistics feature). The example is described in the following subsections:
- Transfer Parameters
- Polling Requirements
- Object List Configuration
- Schema Definition Configuration
- Transfer Parameter Configuration
- Displaying Status
- Bulk Statistics Output File
Transfer Parameters
The following transfer parameters are used for the “Configuring the Periodic MIB Data Collection and Transfer Mechanism” example:
- Transfer interval (collection interval)--30 minutes
- Primary URL--ftp://john:pswrd@cbin2-host/users/john/bulkstat1
- Secondary URL--tftp://john@10.1.1.1/tftpboot/john/bulkstat1
- Transfer format--schemaASCII
- Retry interval--Retry after 6 minutes (retry = 5, retain = 30; 5 retry attempts over the 30-minute retention interval.)
Polling Requirements
The following polling requirements for ATM interface 2/0 and Ethernet interface 2/1 are used for the “Configuring the Periodic MIB Data Collection and Transfer Mechanism” example:
ATM interface 2/0
- Objects to be polled--ifInOctets, ifOutOctets, ifInUcastPkts, ifInDiscards, CcarStatSwitchedPkts, CcarStatSwitchedBytes, CcarStatFilteredBytes
- Polling interval--Once every 5 minutes
- Instances--Main interface and all subinterfaces
- For CAR MIB objects, poll all instances related to the specified interface
Ethernet Interface 2/1
- Objects to be polled--ifInOctets, ifOutOctets, ifInUcastPkts, ifInDiscards, CcarStatSwitchedPkts, CcarStatSwitchedBytes, CcarStatFilteredBytes
- Polling interval--Once every 10 minutes
- Instances--Only main interface is to be monitored
- For CAR MIB objects, only include instances pertaining to packets in the incoming direction (on the main interface)
Object List Configuration
Note that since the IF-MIB objects and the CAR-MIB objects do not have the same index, they will have to be a part of different schemas. However, since the objects required are the same for the ATM interface and the Ethernet interface, the object list can be reused for each schema. Therefore, in the following example, an object list is created for the for the IF-MIB objects and another object list is created for the CAR-MIB objects.
snmp mib bulkstat object-list ifmib add ifInoctets add ifOutoctets add ifInUcastPkts add ifInDiscards exit snmp mib bulkstat object-list CAR-mib add CcarStatSwitchedPkts add CcarStatSwitchedBytes add CcarStatFilteredBytes exit
Schema Definition Configuration
For the following bulk statistics schema configuration, two schemas are defined for each interface--one for the IF-MIB object instances and one for the CAR-MIB object instances.
! ATM IF-MIB schema
snmp mib bulkstat schema ATM2/0-IFMIB
! The following command points to the IF-MIB object list, defined above.
object-list ifmib
poll-interval 5
instance exact interface ATM2/0 subif
exit
! ATM CAR-MIB schema
snmp mib bulkstat schema-def ATM2/0-CAR
object-list CAR-mib
poll-interval 5
instance wildcard interface ATM2/0 subif
exit
!Ethernet IF-MIB schema
snmp mib bulkstat schema Ethernet2/1-IFMIB
object-list ifmib
poll-interval 5
instance exact interface Ethernet2/1
exit
! Ethernet CAR-MIB schema
snmp mib bulkstat schema Ethernet2/1-CAR
object-list CAR-mib
poll-interval 5
! Note: ifindex of Ethernet2/1 is 3
instance wildcard oid 3.1
exit
Transfer Parameter Configuration
For the transfer of the bulk statistics file, the transfer configuration is given the name bulkstat1. All of the four schema definitions are included in the following transfer configuration.
snmp mib bulkstat transfer bulkstat1 schema ATM2/0-IFMIB schema ATM2/0-CAR schema Ethernet2/1-IFMIB schema Ethernet2/1-CAR url primary ftp://username1:pswrd@cbin2-host/users/username1/bulkstat1 url secondary tftp://username1@10.1.0.1/tftpboot/username1/bulkstat1 format schemaASCII transfer-interval 30 retry 5 buffer-size 1024 retain 30 end copy running-config startup-config
Displaying Status
The following sample output for the show snmp mib bulkstat transfer command shows that the initial transfer attempt and the first retry has failed for the newest file, and four additional retry attempts will be made:
Router# show snmp mib bulkstat transfer
Transfer Name : bulkstat1
Primary URL ftp://user:XXXXXXXX@192.168.200.162/
Secondary ftp://user:XXXXXXXX@192.168.200.163/
Retained files
File Name : Time Left (in seconds) : STATE
----------------------------------------------------------------------
bulkstat1_Router_030307_102519739: 1196 :Retry(4 Retry attempt(s) Left)
bulkstat1_Router_030307_102219739: 1016 :Retained
bulkstat1_Router_030307_101919739: 836 :Retained
The filename for the bulk statistics file is generated with the following extensions to the name you specify in the url command:
specified-filename _device-name _date_time-stamp
The device name is the name of the sending device, as specified in the CLI prompt.
The time-stamp format will depend on your system configuration. Typically, the format for the date is YYYYMMDD or YYMMDD. The time stamp uses a 24-hour clock notation, and the format is HHMMSSmmm (where mmm are milliseconds).
In the example above, the files were created on March 7, 2003, at 10:25 a.m., 10:22 a.m., and 10:19 a.m.
Bulk Statistics Output File
The following is sample output as it appears in the bulk statistics file received at the transfer destination. In this output, the name of the bulk statistics file is bulkstat1_Router_20030131_193354234. Also, note that the schema definition (Schema-def) for the schema Ethernet2/1-IFMIB was added to the file as the configuration was changed (see comment lines indicated by “!”).
Schema-def ATM2/0-IFMIB “%u, %s, %u, %u, %u, %u” epochtime ifDescr instanceoid ifInOctets ifOutOctets ifInUcastPkts ifInDiscards Schema-def ATM2/0-CAR “%u, %s, %s, %u, %u, %u, %u “ epochtime ifDescr instanceoid CcarStatSwitchedPkts ccarStatSwitchedBytes CcarStatSwitchedPkts ccarStatSwitchedBytes Schema-def Ethernet2/1-IFMIB “%u, %u, %u, %u, %u, %u” epochtime ifDescr instanceoid ifInOctets ifOutOctets ifInUcastPkts ifInDiscards Schema-def Ethernet2/1-CAR “%u, %s, %u, %u, %u, %u “ Epochtime instanceoid CcarStatSwitchedPkts ccarStatSwitchedBytes CcarStatSwitchedPkts ccarStatSwitchedBytes Schema-def GLOBAL “%s, %s, %s, %u, %u, %u, %u” hostname data timeofday sysuptime cpu5min cpu1min cpu5sec ATM2/0-IFMIB: 954417080, ATM2/0, 2, 95678, 23456, 234, 3456 ATM2/0-IFMIB: 954417080, ATM2/0.1, 8, 95458, 54356, 245, 454 ATM2/0-IFMIB: 954417080, ATM2/0.2, 9, 45678, 8756, 934, 36756 ATM2/0-CAR: 954417083, ATM2/0, 2.1.1, 234, 345, 123, 124 ATM2/0-CAR: 954417083, ATM2/0, 2.2.1, 452, 67, 132, 145 ATM2/0-CAR: 954417083, ATM2/0.1, 8.1.1, 224, 765, 324 234 ATM2/0-CAR: 954417083, ATM2/0.1, 8.2.1, 234, 345, 123, 124 ATM2/0-CAR: 954417083, ATM2/0.2, 9.1.1, 234, 345, 123, 124 ATM2/0-CAR: 954417083, ATM2/0.2, 9.2.1, 452, 67, 132, 145 Ethernet2/1-IFMIB: 954417090, Ethernet2/1, 3, 45678, 8756, 934, 36756 Ethernet2/1-CAR: 954417093, 3.1.1, 234, 345, 123, 124 Ethernet2/1-CAR: 954417093, 3.1.2, 134, 475, 155, 187 ATM2/0-IFMIB: 954417100, ATM2/0, 2, 95678, 23456, 234, 3456 ATM2/0-IFMIB: 954417101, ATM2/0.1, 8, 95458, 54356, 245, 454 ATM2/0-IFMIB: 954417102, ATM2/0.2, 9, 45678, 8756, 934, 36756 ATM2/0-CAR: 954417106, ATM2/0, 2.1.1, 234, 345, 123, 124 ATM2/0-CAR: 954417107, ATM2/0, 2.2.1, 452, 67, 132, 145 ATM2/0-CAR: 954417107, ATM2/0.1, 8.1.1, 224, 765, 324 234 ATM2/0-CAR: 954417108, ATM2/0.1, 8.2.1, 234, 345, 123, 124 ATM2/0-CAR: 954417113, ATM2/0.2, 9.1.1, 234, 345, 123, 124 ATM2/0-CAR: 954417114, ATM2/0.2, 9.2.1, 452, 67, 132, 145 ! Here the Schema-def for “ Ehternet2/1-IFMIB ” was changed on the originating device. Schema-def Ethernet2/1-IFMIB “%u, %u, %u, %u, %u, %u” ! The object ifOutDiscards has been added to the object list for this schema. epochtime ifDescr instanceoid ifInOctets ifOutOctets ifInUcastPkts ifInDiscards ifOutDiscards ! The following data sample reflects the change in the configuration. Ethernet2/1-IFMIB: 954417090, Ethernet2/1, 3, 45678, 8756, 934, 36756, 123 Ethernet2/1-CAR: 954417093, 3.1.1, 234, 345, 123, 124 Ethernet2/1-CAR: 954417093, 3.1.2, 134, 475, 155, 187 GLOBAL: Govinda, 20020129, 115131, 78337, 783337, 2%, 0%, 62%
Additional References
Related Documents
Related Topic |
Document Title |
---|---|
Cisco IOS commands |
|
SNMP commands |
Cisco IOS Network Management Command Reference |
SNMP configuration tasks |
“Configuring SNMP Support” module in the Cisco IOS Network Management Configuration Guide |
MIBs
MIBs |
MIBs Link |
---|---|
This feature supports all Cisco implemented MIBs. This feature uses the Cisco Data Collection MIB (CISCO-DATA-COLLECTION-MIB.my) function of reporting errors and statistics during data collection and transfer. The Cisco Data Collection MIB also supports configuring data collection using the CLI, as well as with SNMP. |
To locate and download MIBs for selected platforms, Cisco software releases, and feature sets, use Cisco MIB Locator found at the following URL: |
RFCs
RFC |
Title |
---|---|
None |
-- |
Technical Assistance
Description |
Link |
---|---|
The Cisco Support website provides extensive online resources, including documentation and tools for troubleshooting and resolving technical issues with Cisco products and technologies. To receive security and technical information about your products, you can subscribe to various services, such as the Product Alert Tool (accessed from Field Notices), the Cisco Technical Services Newsletter, and Really Simple Syndication (RSS) Feeds. Access to most tools on the Cisco Support website requires a Cisco.com user ID and password. |
Feature Information for Periodic MIB Data Collection and Transfer Mechanism
The following table provides release information about the feature or features described in this module. This table lists only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature.
Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/go/cfn. An account on Cisco.com is not required.
Table 1 | Feature Information for Periodic MIB Data Collection and Transfer Mechanism |
Feature Name |
Releases |
Feature Information |
---|---|---|
Periodic MIB Data Collection and Transfer Mechanism |
12.0(24)S 12.2(25)S 12.2(33)SB 12.2(33)SRA 12.2(33)SRC 12.2(33)SXH 12.2(50)SY 12.3(2)T 15.0(1)S Cisco IOS XE 3.1.0SG |
The Periodic MIB Data Collection and Transfer Mechanism provides the ability to periodically transfer selected MIB data from Cisco IOS-based devices to specified Network Management Systems (NMS). Using the CLI, data from multiple MIBs can be grouped into lists, and a polling interval (frequency of data collection) can be configured. All the MIB objects in a list are periodically polled using this specified interval. The collected data from the lists can then be transferred to a specified NMS at a user-specified transfer interval (frequency of data transfer) using TFTP, rcp, or FTP. The following commands were introduced or modified by this feature: add (bulkstat object), buffer-size (bulkstat), context (bulkstat), debug snmp bulkstat, enable (bulkstat), format (bulkstat), instance (MIB), instance range, instance repetition, object-list, poll-interval, retain, retry (bulkstat), schema, show snmp mib bulkstat transfer, snmp mib bulkstat object-list, snmp mib bulkstat schema, snmp mib bulkstat transfer, snmp-server enable traps bulkstat, transfer-interval, url (bulkstat). |
Cisco and the Cisco Logo are trademarks of Cisco Systems, Inc. and/or its affiliates in the U.S. and other countries. A listing of Cisco's trademarks can be found at www.cisco.com/go/trademarks. Third party trademarks mentioned are the property of their respective owners. The use of the word partner does not imply a partnership relationship between Cisco and any other company. (1005R)
Any Internet Protocol (IP) addresses and phone numbers used in this document are not intended to be actual addresses and phone numbers. Any examples, command display output, network topology diagrams, and other figures included in the document are shown for illustrative purposes only. Any use of actual IP addresses or phone numbers in illustrative content is unintentional and coincidental.
© 2011 Cisco Systems, Inc. All rights reserved.