Pardon me if this has been asked and answered, but I did look around and I did not see it.
I have set up a monitor session on a 2950 but I cannot see the traffic. The applications I am using, windump and ethereal on win2k, are vlan aware, but using "vlan" as an expression in windump or as a filter in ethereal does not work.
If I omit the vlan filter, I see stuff like bpdus and cdp stuff. When I apply the filter, I see nothing at all. In windump I use a command like like:
windump -i 3 vlan
windump -e -i 3 vlan
I am using the latest and greatest winpcap, windump, ethereal, etc. I also know that I could probably use a real sniffer, but I kind of hate to ask my boss to spend $20,000 just because a freebie doesn't want to work for me. (I'd rather ask him to spend $20,000 based on what the real sniffer can do that the freebie can't! ;-) )
Possilby if you included your monitor configuration in your request we could help you more. The products you are trying to use should work for you fine but if your monitor is setup incorrectly you will see nothing.
Actually, I started with Ethereal, and switched to windump because both ride on wincap and I find it easier to troubleshoot a command line app because the GUI just gets in the way if things are not working. Thanks for the note, though.
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...