RSPAN between 2950 and 3500

[dal]

Hi!

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?

I got the setup from http://www.cisco.com/en/US/customer/products/hw/switches/ps628/products_configuration_guide_chapter09186a00800c6f14.html

the document for the C3550 i pretty much the same, so I can't see any reason for this to work.

Thanks,

Øystein Gåsdal

Norway

[paddyxdoyle]

Hi,

Did you create VLAN 310 as an rspan VLAN?

vlan 310

remote-span

end

Also, i'd double check whether your dot1.q trunk is trunking 310

HTH

Paddy

[dal]

No, actually I did not create it as a rspan vlan?

So this must be done in the VTP server then?

Thank you, I'll try this right away :)

[dal]

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? :)

Thanks,

Øystein Gåsdal

Norway

[paddyxdoyle]

Hi,

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

Thanks

Paddy

[dal]

As far as I can see the C3508G is still available, but has no software that support RSPAN.