Useful CLI Commands for troubleshooting F5 LTM

-# cd /var/log       >        # ls

tail -f /var/log/ltm    One of the best commands

This will show the last 10 log entries of the ltm log file and will ‘follow’ any changes, showing them on the screen whenever they are added.

tcpdump

useful tool for troubleshooting network traffic between clients, F5 devices, and backend machines. packet tracing with the tcpdump utility.pdf

ssldump

If you’re using HTTPS instead of HTTP, you may need to use ssldump as well to decrypt the captures from the tcpdump.  packet tracing with the ssldump utility.pdf

 

tmsh Reference Guidebigip-tmsh-11-4-0.pdf

 

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