I have two 3550's connected in a stack using gig ports. I wanna moniter port fa0/1 of switch one and fa0/1 of switch two traffic on port fa0/4 of switch one. I wanna to know if i can configure RSPAN to do that. Please let me know how to do it. Thanks for your help
Yes, what you want is possible with RSPAN.
Create a RSPAN VLAN, let's say VLAN 500 on both switches.
Configure the port you want to copy frames from into the RSPAN VLAN.
monitor session 1 source interface FastEthernet0/1
monitor session 1 destination remote vlan 500 reflector-port FastEthernet0/24
Finally configure a session that copies the frames from the RSPAN VLAN into the port with sniffer attached.
monitor session 2 source remote vlan 500
monitor session 2 destination interface FastEthernet0/5
Verify your configuration.
show monitor session all
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