Guys ..need help.
Got an intermittent spanning Tree problem i cant seem to be able to trace.
Keep seeing errors of Duplicate Mac address via HSRP interfaces on only two vlans.
Two Cisco 7609 in HSRP pair, down stream trunks to Nokia ESB Switches ( intregrated into Media GWs ) .
Problem only stops when you disallow the vlan traffic from the trunk port connecting the two 7609s.
Can anyone give a quick heads up on how to locate this ?