Spanning Tree Topology Change Received:

Question

Hello Support,

We have a N3024F switch with firmware 6.2.0.5.

In the log files we have dozens of messages like this, I am attaching the complete log file :

Spanning Tree Topology Change Received: MSTID: 0 Gi1/0/7

These messages use to come from the interfaces Gi1/0/3 and Gi1/0/7 and both are final switches (N2024P) with Ruckus AP. Maybe it could be a configuration problem on these end switches? What should be the problem?

Thank you.

René

DELL-Josh Cr · Answer

Hi, Are both ports connected to the same AP? How is the Spanning tree configured?

ReneFontan · Answer

Hi Josh, No, there is one switch connected to another switch and this switch has the connections of the AP. The spanning tree configuration is RSTP. I attach the configuration file. Thanks, René

DELL-Josh Cr · Answer

Try changing the spanning tree priority and see if that helps. console(config)#spanning-tree priority 4096

ReneFontan · Answer

Hello Josh, this switch is spanning tree 0 because is the core switch of our network. Thanks.

DELL-Josh Cr · Answer

What does show spanning-tree detail show?

ReneFontan · Answer

Hi Josh, I attach the request info. Thanks, René

DELL-Josh Cr · Answer

Those two ports seem to be receiving a lot more BPDUs than the other ports. Can you try turning on bpdu guard on those ports?

ReneFontan · Answer

Thank you Josh. I read that it is not convenient to activate BPDU Guard on Trunk ports, Is it ok to activate? Regards, René

MK.W · Answer

All ports that face to terminal (computer/server/AP) should be configred to 'spanning-tree portfast'. this issue would be improve.

Networking General

Spanning Tree Topology Change Received:

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