Thanks to all for the suggestions. I ended up just using ipconfig to show the NIC in and out of promiscuous mode, and used tcpdump with and without the -p flag to show the output. It all worked out fine.

Greg

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On Wed, 2008-07-16 at 13:50 -0500, Greg Lawson wrote:

I need to demonstrate the differences of a NIC being in promiscuous mode and when it's not for a college class. Can anyone think of any good shell commands to run "before and after" which show what traffic the NIC can and can't see?

Greg Lawson Rolling Hills Consolidated Library 1912 N. Belt Highway St. Joseph, MO 64506