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Catalyst 2960 - Send SPAN / RSPAN traffic to same port

I have two 2960's connected with a trunk (i.e. cross connect on Gi0/1 on both switches). I have two ports on each switch (four total) that I am trying to monitor with SPAN/RSPAN on one port / one switch. I can get SPAN to work (send traffic from two source ports on switch 1 to destination port on switch 1); I can also get RSPAN to work (send traffic from two source ports on switch 2 to destination port on switch 1). However, I cannot get both of these to work at the same time - i.e. send SPAN traffic on switch 1 and RSPAN traffic on switch 2 all to a single destination port on switch 1. Any suggestions?

4 REPLIES

Re: Catalyst 2960 - Send SPAN / RSPAN traffic to same port

I'm really not sure if this will work.. Just see the following URL for the guidelines for SPAN and RSPAN...

http://www.cisco.com/en/US/products/hw/switches/ps708/products_configuration_guide_chapter09186a008007e6fa.html#wp1042096

On the RSPAN parameters, u need to have the ports on the RSPAN VLANs.. not really sure if this VLAN can take the SPAN traffic.. Will check further and let u know.

Raj

Re: Catalyst 2960 - Send SPAN / RSPAN traffic to same port

You cannot have a single destination port for both the SPAN and RSPAN session on the 2960's. This is a destination port restriction on the switch. You can have 2 different session with 2 different destination ports and that too with in the SPAN/RSAPN configuration restrictions. Please check the link above posted by Raj for the same restrictions.

HTH,Please rate if it does.

-amit singh

New Member

Re: Catalyst 2960 - Send SPAN / RSPAN traffic to same port

I decided to move the SPAN traffic of both switches to a third switch that is already connected to both - then all traffic is RSPAN and can use a single destination port. My limitation is an IDS server with a single inspection port.

Re: Catalyst 2960 - Send SPAN / RSPAN traffic to same port

I think that should work in this case. Make sure that you have RSPAN configured on both the switches with source interfaces/vlans and RSPAN vlans and bring this traffic to the third switch where you have destination port connected. this should work in this case.

-amit singh

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