How to Enable or Disable Spanning Tree on a Particular VLAN

In this video, the presenter explains how to enable or disable spanning tree protocol for specific VLANs on a Layer 3 switch. By default, spanning tree is enabled for all VLANs. The presenter demonstrates how to check the spanning tree status using the command "show spanning tree," which displays the root ID and priority values for VLANs 1, 10, 20, and 30. The priority is calculated based on the default value (32768) plus the VLAN number, resulting in different priorities for each VLAN. To disable spanning tree for a specific VLAN, the command "no spanning tree vlan 30" is used, which removes it from VLAN 30 while keeping it enabled for VLANs 1 and 10. To re-enable spanning tree for VLAN 30, the command "spanning tree vlan 30" is issued.