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Excessive spanning tree topology change in a 5510 stack seen in logs

thread902-1774970

Excessive spanning tree topology change in a 5510 stack seen in logs

Excessive spanning tree topology change in a 5510 stack seen in logs

(OP)
I have a 5510 stack that has multiple L2 VLAN;s on it. It is constantly outputting a spanning tree topology change to our syslog server. The ports are very static, meaning no links are changing status. Any input on what triggers this and if it of concern?

Below are examples
2/27/2017 08:31 AM dmz_5510_sw_stk1
192.168.223.250
:Trap: topologyChange

2/27/2017 08:31 AM dmz_5510_sw_stk1
192.168.223.250
:Trap: topologyChange

2/27/2017 08:31 AM dmz_5510_sw_stk1
192.168.223.250
:Trap: topologyChange

2/27/2017 08:31 AM dmz_5510_sw_stk1
192.168.223.250
:Trap: topologyChange

2/27/2017 08:31 AM dmz_5510_sw_stk1
192.168.223.250
:Trap: topologyChange

2/27/2017 08:31 AM dmz_5510_sw_stk1
192.168.223.250
:Trap: newRoot

2/27/2017 08:31 AM dmz_5510_sw_stk1
192.168.223.250
:Trap: topologyChange

2/27/2017 08:31 AM dmz_5510_sw_stk1
192.168.223.250
:Trap: newRoot

2/27/2017 08:31 AM dmz_5510_sw_stk1
192.168.223.250
:Trap: topologyChange

2/27/2017 04:25 AM dmz_5510_sw_stk1
192.168.223.250
:Trap: topologyChange

2/27/2017 04:25 AM dmz_5510_sw_stk1
192.168.223.250
:Trap: topologyChange

RE: Excessive spanning tree topology change in a 5510 stack seen in logs

topologyChange messages come from the stp root switch to signify a change in the topology. As can be seen by the following "Trap: newRoot".

If no ports are going up/down on the 5510 try looking at your other switches in the network to see why the topology is changing..

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