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User Guide for Internetwork Performance Monitor
OL-11291-01
Appendix A IPM FAQs and Troubleshooting Tips
IPM FAQs
Note A collector is the term that IPM uses to describe an entity that performs a specific measurement between
a specific source router and target device.
Q.
Can I configure collectors that use SA Agent targets and NNTP, POP3, or SMTP operations?
A.
No. SA Agent targets are routers, and routers cannot perform NNTP, POP3, or SMTP services.
If you configure a collector with an SA Agent target and an NNTP, POP3, or SMTP TCP Connect
operation (such as DefaultNNTP, DefaultPOP3, or DefaultSMTP), IPM displays “No Connection”
error messages and does not collect data.
Q.
Which Cisco hardware platforms support the SA Agent feature of the Cisco IOS software?
A.
At the time of IPM 2.6 release, all platforms supporting the Cisco IOS software, also support the
SA Agent, except for:
• Cisco 700 series router
• Cisco 90 series router
IPM supports all Cisco IOS platforms that provide support for the SAA agent. As new platforms are
released, you should verify if your devices are running SA Agent. For information about verifying
whether SA Agent running on your Cisco IOS software, seeVerify Your SA Agent Version.
Note Because IPM uses processor memory to create collectors, if a source router (such as a 805 running 12.2T
or 12.3 versions) only has virtual memory , IPM will not be able to configure the SAA agent via SNMP.
Q.
How does IPM interact with the SA Agent feature of the Cisco IOS software?
A.
IPM uses SNMP to configure the SA Agent in the Cisco IOS software to take measurements of
network performance statistics. IPM then uses SNMP to collect the statistics from the SA Agent,
and stores that information in a database for future presentation and analysis.
For information about verifying whether SA Agent running on your Cisco IOS software, see Verify
Your SA Agent Version.
Q.
What are the names of the MIBs used by IPM?
A.
IPM extensively uses the CISCO-RTTMON-MIB, which is a part of the SA Agent in the Cisco IOS
software. Almost all the tables in the RTTMON-MIB are queried by IPM. The
IMAGE-MIB-CISCO, MEMORY-MIB-CISCO, and the SYSTEM-MIB are used minimally.
4. IP Path Echo collectors are not supported on routers running Cisco IOS software release12.0(x)T.
To create IP Path Echo collectors, you must upgrade the routers defined as source routers to Cisco
IOS software release 12.1(1) or later.
5. Maximum number of collector depends on the available memory on the router.