Symptom

- Wrong CDP information - Several devices attached to one interface on CDP information - Wrong STP information possibly causing loops/wrong STP root.

Conditions

RSPAN configured

Workaround

Remove RSPAN configuration or Configure VLAN ACL on all devices running rspan vlan on the path: mac access-list extended RSPANVACL permit any 0100.0c00.0000 0000.00ff.ffff permit any 0180.c200.0000 0000.00ff.ffff vlan access-map RSPAN 10 match mac address RSPANVACL action drop vlan access-map RSPAN 20 action forward vlan filter RSPAN vlan-list

Further Problem Description