Cisco Asr 1000 Series Aggregation Services Routers Sip And Spa Software Configuration Guide, Cisco Ios - Cisco ASR 1000 Series Software Configuration Manual

Using debug Commands
• Cisco ASR 1000 Series SIP—ASR1000_SIP
• 2-Port and 4-Port Channelized T3 SPA—SPA_CHOC_DSX
• 2-Port and 4-Port Clear Channel T3/E3 Serial SPA—SPA_T3E3
Using debug Commands
Because debugging output is assigned high priority in the CPU process, it can render the system unusable.
Caution
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.
Along with the other debug commands supported on the Cisco ASR 1000 Series Routers, you can obtain
specific debug information for SPAs on the Cisco ASR 1000 Series Routers using the debug hw-module
subslot privileged EXEC command.
The debug hw-module subslot command is intended for use by Cisco technical support personnel. For
information about other debug commands supported on the Cisco ASR 1000 Series Routers, refer to the Cisco
IOS Debug Command Reference and any related feature documents for your Cisco IOS software release.
Using show Commands
There are several show commands that you can use to monitor and troubleshoot the SIPs and SPAs on the
Cisco ASR 1000 Series Routers. This chapter describes using the show interfaces and show controllers
commands to perform troubleshooting of your SPA.
Performing Basic Interface Troubleshooting
You can perform most of the basic interface troubleshooting using the show interfaces serial command and
examining several areas of the output to determine how the interface is operating.
The output of the show interfaces serial EXEC command displays information specific to serial interfaces.
The output of the show interfaces serial command will vary depending on the type of serial SPA.
Note
This section describes how to use the show interfaces serial command to diagnose serial line connectivity
problems in a wide-area network (WAN) environment. The following sections describe some of the important
fields of the command output:
Serial Lines: show interfaces serial Status Line Conditions
You can identify five possible problem states in the interface status line of the show interfaces serial display:
• Serial x is down, line protocol is down

Cisco ASR 1000 Series Aggregation Services Routers SIP and SPA Software Configuration Guide, Cisco IOS

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Troubleshooting the Serial SPAs
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