Disabling Spanning Tree Protocol - Cisco Catalyst 4500 Series Configuration Manual

Configuring STP

Disabling Spanning Tree Protocol

To disable spanning tree on a per-VLAN basis, perform this task:
Command
Step 1
Switch(config)# no spanning-tree vlan vlan_ID
Step 2
Switch(config)# end
Step 3
Switch# show spanning-tree vlan vlan_ID
This example shows how to disable spanning tree on VLAN 200:
Switch# configure terminal
Switch(config)# no spanning-tree vlan 200
Switch(config)# end
Switch#
This example shows how to verify the configuration:
Switch# show spanning-tree vlan 200
Spanning tree instance for VLAN 200 does not exist.
Switch#
Enabling Per-VLAN Rapid Spanning Tree
Per-VLAN Rapid Spanning Tree (PVRST+) uses the existing PVST+ framework for configuration
purposes and for interaction with other features. It also supports some of the PVST+ extensions.
To configure PVRST+, perform this task:
Command
Step 1
Switch(config)# [no] spantree mode rapid-pvst
Step 2
Switch(config)# interface interface/port
Step 3
Switch(config)#
spanning-tree link-type point-to-point
Step 4
Switch(config-if)# exit
Step 5
Switch(config)# exit
Step 6
Switch(config-if)# clear spantree
detected-protocols mod/port
Step 7
Switch# show spanning-tree summary totals
The following example shows how to configure Rapid-PVST+:
Switch# config t
Enter configuration commands, one per line.
Switch(config)# spanning-tree mode rapid-pvst
Switch(config)# int fa 6/4
Switch(config-if)# spanning-tree link-type point-to-point
Switch(config-if)# end
Switch(config)# end
Switch#
23:55:32:%SYS-5-CONFIG_I:Configured from console by console
Software Configuration Guide—Release IOS XE 3.3.0SG and IOS 15.1(1)SG
20-20
Chapter 20
Purpose
Disables spanning tree on a per-VLAN basis.
Exits configuration mode.
Verifies that spanning tree is disabled.
Purpose
Enables rapid-PVST+.
Switches to interface configuration mode.
Sets the link-type to point-to-point mode for the port.
Exits interface mode.
Exits configuration mode.
Detects any legacy bridges on the port
Verifies the rapid-PVST+ configuration.
End with CNTL/Z.
Configuring STP and MST
OL-25340-01