Learn how to disable spanning tree on specific VLANs when you are certain there are no loops in the network topology. Use this procedure to prevent Spanning Tree protection where it is not needed, but exercise caution to avoid network issues.
You can disable spanning tree on specific VLANs when you are certain there are no loops in the network topology.
This task allows you to disable spanning tree protection on VLANs where loops cannot occur. Use extreme caution, because disabling Spanning Tree when loops are present can drastically reduce network performance.
When Spanning Tree is disabled and loops are present in the topology, excessive traffic and indefinite packet duplication can drastically reduce network performance.
Before you begin
Spanning Tree is enabled by default on VLAN 1 and on all newly created VLANs up to the Spanning Tree limit. Only disable spanning tree if you are sure there are no loops in the network topology.
Procedure
| 1. | Use the enable command to enter privileged EXEC mode. Example:Enter your password if prompted. |
|
| 2. | Use the configure terminal command to enter global configuration mode. Example: |
|
| 3. | Use the no spanning-tree vlan command to disable spanning tree for the specified VLAN. Example:For |
|
| 4. | Use the end command to return to privileged EXEC mode. Example: |