4 Command Line Interface

show spanning-tree

This command shows the configuration for the common spanning tree (CST) or for an instance within the multiple spanning tree (MST).

Syntax

show spanning-tree [interface mst instance_id]

•interface

•ethernet unit/port

-unit - This is unit 1.

-port - Port number. (Range: 1-8)

•port-channel channel-id(Range: 1-4)

•instance_id - Instance identifier of the multiple spanning tree. (Range: 0-4094, no leading zeroes)

Default Setting

None

Command Mode

Privileged Exec

Command Usage

•Use the show spanning-tree command with no parameters to display the spanning tree configuration for the switch for the Common Spanning Tree (CST) and for every interface in the tree.

•Use the show spanning-tree interface command to display the spanning tree configuration for an interface within the Common Spanning Tree (CST).

•Use the show spanning-tree mst instance_id command to display the spanning tree configuration for an instance within the Multiple Spanning Tree (MST).

•For a description of the items displayed under “Spanning-tree information,” see “Configuring Global Settings” on page 3-116.For a description of the items displayed for specific interfaces, see “Displaying Interface Settings” on page 3-120.

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