Using The Cisco Ios Event Tracer To Troubleshoot Problems - Cisco ASR 1000 Series Software Configuration Manual

Troubleshooting the Serial SPAs

Using the Cisco IOS Event Tracer to Troubleshoot Problems

This feature is intended for use as a software diagnostic tool and should be configured only under the direction
of a Cisco Technical Assistance Center (TAC) representative.
The Event Tracer feature provides a binary trace facility for troubleshooting Cisco IOS software. This feature
gives Cisco service representatives additional insight into the operation of the Cisco IOS software and can be
useful in helping to diagnose problems in the unlikely event of an operating system malfunction or, in the
case of redundant systems, Route Processor switchover.
Event tracing works by reading informational messages from specific Cisco IOS software subsystem
components that have been preprogrammed to work with event tracing, and by logging messages from those
components into system memory. Trace messages stored in memory can be displayed on the screen or saved
to a file for later analysis.
The SPAs currently support the "spa" component to trace SPA OIR-related events.
For more information about using the Event Tracer feature, refer to the following URL:
http://www.cisco.com/en/US/docs/ios/12_0s/feature/guide/evnttrcr.html
Preparing for Online Insertion and Removal of a SPA
The Cisco ASR 1000 Series Aggregation Services Routers support online insertion and removal (OIR) of the
SIP, in addition to each of the SPAs. Therefore, you can remove a SIP with its SPAs still intact, or you can
remove a SPA independently from the SIP, leaving the SIP installed in the router.
This means that a SIP can remain installed in the router with one SPA remaining active, while you remove
another SPA from one of the SIP subslots. If you are not planning to immediately replace a SPA into the SIP,
then be sure to install a blank filler plate in the subslot. The SIP should always be fully installed with either
functional SPAs or blank filler plates.
For more information about activating and deactivating SPAs in preparation for OIR, see the Troubshooting
the SIP chapter.
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Cisco ASR 1000 Series Aggregation Services Routers SIP and SPA Software Configuration Guide, Cisco IOS XE
Using the Cisco IOS Event Tracer to Troubleshoot Problems
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