I have a Trunked ring of 4-2950 Switches. All support RSPAN. I want to monitor ports Fa0/2 off of BOTH switch A & B. My sniffer is off port Fa0/23 on switch D. RSPAN VLAN =900, Reflector ports are Fa0/22 on both A & B.
However, my sniffer only detects data on Fa0/2 off Switch A. It does NOT see any data from Fa0.2 off Switch B. Hope someone knows what the heck I did wrong. Thanks.
Switch A & B set up:
monitor session 2 source interface Fa0/2
monitor session 2 destination remote vlan 900 reflector-port Fa0/22
No RSPAN configuration.
monitor session 2 source remote vlan 900
monitor session 2 destination interface Fa0/23
Confusion reigns :-)
As you have a looped network which of the ports forming the switch interlinks is in blocking mode due to STP ?
Also what version of IOS are you running on your switches.