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Major STP Problems !

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.

Scenario :

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 ?

1 REPLY

Re: Major STP Problems !

this link covers prety much what you need to look into for troubleshooting the problem, hsrp verification, look into E:" spanning tree troubleshooting" section as well.

http://www.cisco.com/en/US/tech/tk648/tk362/technologies_tech_note09186a0080094afd.shtml#intro

HTH

Jorge

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