Check Packet Forwarding Engine Microkernel Core Files
Purpose
If you observe disruption to the Packet Forwarding Engine microkernel, check the /var/crash directory for any core files created around the time of the crash.
Action
To check the /var/crash directory, use the following Junos OS CLI operational mode command:
user@host> file list detail /var/crash
Sample Output
user@host> file list detail /var/crash var/crash: total 456630 -rw-r--r-- 1 root wheel 6814720 Dec 18 08:03 core-FPC4.100111808032 -rw-r--r-- 1 root wheel 65613824 Dec 10 04:58 core-SCB.100111004570 -rw-r--r-- 1 root wheel 65613824 Dec 19 00:23 core-SCB.100111900221 -rw-r--r-- 1 root wheel 65545216 Feb 9 20:46 core-SCB.101010920452
Meaning
The sample output lists the contents of the /var/crash/ directory. Check the date and timestamp for any core files created around the time of the crash. In the example above, four core files are listed.