I'm trying snif traffic on port 12 on my C2950 by setting up RSPAN and and send it to port 48 on my C3550. Those two switches are connected via a dot1q trunk.
And here are the configs:
On the 2950:
monitor session 1 source interface fastEthernet 0/12 both
monitor session 1 destination remote vlan 310 reflector-port fastEthernet 0/23
On the 3550:
monitor session 1 source remote vlan 310
monitor session 1 destination interface fastEthernet 0/48
VLAN 310 is created on a VTP server and exists in both switches.
But (as I'm sure you have guessed by now :) this does not work.
The sniffers i connect to port 48 on the C3550 does not recieve any traffic at all.
So.. any ideas? This should be possible right?
the document for the C3550 i pretty much the same, so I can't see any reason for this to work.
Did you create VLAN 310 as an rspan VLAN?
Also, i'd double check whether your dot1.q trunk is trunking 310
Hmm, I just realized that the VTP server is on a C3508G, and that command does not exist there.
So what are my options?
make the C2950 and the C3550 vtp transparent and create the vlan 310 manually... But then I get no more VTP updates from the server.. or?
Or I could move the VTP server to a device that supports this command, like the mentioned C3550.. that is probably the most permanent solution.
anything easier I haven't thougth of? :)
Is the C3508G still available, perhaps you could check for a newer version of code with the rspan VLAN feature and upgrade the firmware.
This way you don't have to change your VTP structure