Cisco CRS-1 - Carrier Routing System Router Troubleshooting Guide

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Cisco IOS XR Troubleshooting Guide for the Cisco CRS-1 Router
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Chapter 8 Process Monitoring and Troubleshooting
Redundancy and Process Restartability
• Collect data from the follow job or follow process command. See the “follow Command” section
on page 8-173 for more information on these commands.
Caution If your system is running Release 3.8.0, 3.8.1, 3.8.2, or 3.9.0 software, you should not run the
follow process and follow job commands, because these can cause a kernel crash at the target node.
Therefore, for these software releases, you should use other available commands for troubleshooting and
call Cisco Technical Support if the problem is not resolved. (This crash behavior does not occur for
releases other than the ones listed.)
• Use the dumpcore running job-id location node-id command on the affected process. The output
of the dumpcore is located in harddisk:/dumper, unless the location has been configured using the
exception choice command.
Caution Some processes are dangerous to restart. It is recommended that you involve your technical
representative and follow the advice from Cisco Technical Support. For contact information for
Cisco Technical Support, see the “Obtaining Documentation and Submitting a Service Request” section
on page viii in the Preface.
Example:
RP/0/RP0/CPU0:router# show processes blocked
Jid Pid Tid Name State Blocked-on
65546 8202 1 ksh Reply 8200 devc-conaux
51 36890 2 attachd Reply 32791 eth_server
51 36890 3 attachd Reply 12301 mqueue
75 36893 5 qnet Reply 32791 eth_server
75 36893 6 qnet Reply 32791 eth_server
75 36893 7 qnet Reply 32791 eth_server
75 36893 8 qnet Reply 32791 eth_server
50 36899 2 attach_server Reply 12301 mqueue
334 172108 1 tftp_server Reply 12301 mqueue
247 290991 2 lpts_fm Reply 184404 lpts_pa
65750 644260054 1 exec Reply 1 kernel
65752 655270104 1 config Reply 286888 devc-vty
367 2642149 5 mpls_ldp Reply 2642153 lspv_server
65772 655229164 1 exec Reply 1 kernel
65773 656842989 1 more Reply 12299 pipe
65774 656842990 1 show_processes Reply 1 kernel
Note To troubleshoot a blocked process, use the procedure in the “Troubleshooting a Process Block” section
on page 8-188.
Redundancy and Process Restartability
On systems using Cisco IOS XR software, applications primarily use a combination of two fatal error
recovery methods: process restartability and process (application) redundancy.

Cisco CRS-1 - Carrier Routing System Router Specifications

General

Brand	Cisco
Model	CRS-1 - Carrier Routing System Router
Category	Network Router
Language	English