Spanning Ports from Multiple Layer 3 Hops Away

[yuchenglai]

Has anyone had experience in spanning switch ports that are multiple Layer 3 hops away from the network sniffing workstation?

[Martin Parry · Accepted solution]

Hi

You should look at ERSPAN. It uses a GRE tunnel to transport the traffic accross the routed network.

http://www.cisco.com/en/US/docs/switches/lan/catalyst6500/ios/12.2SX/configuration/guide/span.html#wp1048235

Hope this helps

Martin