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Forum Discussion

Maneesh_72711's avatar
Maneesh_72711
Icon for Cirrostratus rankCirrostratus
Feb 26, 2014

TCPDUMP OUTPUT

I have a strange situation, when I run a tcpdump without the -n switch I do not get any output on the interface, but as soon as I add -n I start seeing the packets. Has anyone else encountered the sa...
application delivery
LTM
management
Mike_61663's avatar
Mike_61663
Icon for Cirrus rankCirrus
Feb 27, 2014

-n means don't resolve the IP addresses to hostnames.

 

Do you have DNS set up and is it working? I would recommend always disabling tcpdump name resolution when doing realtime packet captures. i.e. Always use -n for realtime captures!