Resolved! RSPAN problem
The toplogy is:Cat3550 (RSPAN Source) - Cat6506-A (IOS) - Cat6006 (CatOS) - Cat6506-B (IOS) (RSPAN Destination)Cat3550 configuration:monitor session 1 source interface Fa0/46monitor session 1 destination remote vlan 900 reflector-port Fa0/44RSPAN VLA...