Spanning-tree Topology changes

This commands shows the  recent spanning-tree topology  changes occurred  per Vlans.

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CAL-Core-Sw01#sh spanning-tree detail | i is executing |topology changes|form

VLAN0001 is executing the rstp compatible Spanning Tree protocol

  Number of topology changes 20159 last change occurred 02:14:44 ago

VLAN0030 is executing the rstp compatible Spanning Tree protocol

  Number of topology changes 6 last change occurred 1y21w ago

The below commands shows the port on the Vlan is designated or not.

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KNV-CORE-SW01#sh spanning-tree detail | i is executing |topology changes|Gi

VLAN0016 is executing the rstp compatible Spanning Tree protocol

  Number of topology changes 0 last change occurred 8w2d ago

Port 2 (GigabitEthernet1/0/2) of VLAN0016 is designated forwarding

Port 3 (GigabitEthernet1/0/3) of VLAN0016 is designated forwarding

Port 4 (GigabitEthernet1/0/4) of VLAN0016 is designated forwarding

Port 6 (GigabitEthernet1/0/6) of VLAN0016 is designated forwarding

Port 7 (GigabitEthernet1/0/7) of VLAN0016 is designated forwarding

Port 10 (GigabitEthernet1/0/10) of VLAN0016 is designated forwarding

We can change the last description to see the various changes. Ex. |topology changes|Gi or from  etc..

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