Unanswered Question
Jun 2nd, 2009
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Hi everyone,

I'm running version 4.1.1d, I'm unable to use the tcpdump/tethereal to perform a pre capture filter on only devices using WCCP GRE, it works fine using WCCP L2. Has anyone ran into this problem?

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mchin345 Mon, 06/08/2009 - 07:58
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Try this configuration.

To dump network traffic, use the tcpdump EXEC command.

tcpdump [LINE]

TCPdump is a utility that allows a user to intercept and capture packets passing through a network interface, making it useful for troubleshooting network applications.

To analyze network traffic from the command line, use the tethereal EXEC command.

tethereal [LINE]

Tethereal is the command-line version of the network traffic analyzer tool Ethereal. Like TCPdump, it also uses the packet capture library (libpcap). Aside from network traffic analysis, Tethereal also provides facilities for decoding packets.

johng231 Mon, 06/08/2009 - 08:14
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Are you able to apply a post capture filter on WAAS box that's running WCCP GRE to the router ??? If so, what is the syntax to perform this? It only works if you don't do a pre capture filter, you're able to see both sides of the conversation.


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