
Because debugging output is assigned high priority in the CPU process, it can render the system unusable.
For this reason, use
debug
commands only to troubleshoot specific problems or during troubleshooting
sessions with Cisco technical support staff. Moreover, it is best to use
debug
commands during periods
of lower network traffic and fewer users. Debugging during these periods decreases the likelihood that
increased
debug
command processing overhead will affect system use.
Caution
For information about other
debug
commands supported on the Cisco Aggregation Services Router 1000
Series, refer to the following:
•
Cisco IOS Debug Command Reference - Commands A to D
•
Cisco IOS Debug Command Reference - Commands E through H
•
Cisco IOS Debug Command Reference - Commands I through L
•
Cisco IOS Debug Command Reference - Commands M through R
•
Cisco IOS Debug Command Reference - Commands S through Z
Using show Commands
There are several
show
commands that you can use to monitor and troubleshoot the SIP and SPA on the Cisco
ASR 1000 Series Routers. This chapter describes using the
show hw-module subslot
command to perform
troubleshooting of your SPA.
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/c/en/us/td/docs/ios-xml/
ios/bsm/configuration/15-mt/bsm-15-mt-book/bsm-event-tracer.html
Preparing for Online Insertion and Removal of a SIP and SPAs
The Cisco Aggregation Services Router 1000 Series support online insertion and removal (OIR) of the SPA
interface processor (SIP), in addition to each of the shared port adapters (SPAs). Therefore, you can remove
Cisco ASR 1000 Series Aggregation Services Routers SIP and SPA Software Configuration Guide, Cisco IOS
XE Everest 16.5
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Troubleshooting the SIP
Using show Commands