Step 3: 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 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

What It Means

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.