instance

Maps a VLAN to a Multiple Spanning Tree Protocol (MSTP) instance. You can group a set of VLANs to an instance.

Syntax

instance instance_id [ vlan vlan_id | priority priority_id ]

no instance

Command Default

The priority value is 32768.

Parameters

instance_id

Specifies the MSTP instance. Valid values range from 1 through 31.

vlan vlan_id: Specifies the VLAN to map an MSTP instance. Refer to the Usage Guidelines.
priority priority_id: Specifies the priority for the specified instance. Valid values range from 0 through 61440. The priority values can be set only in increments of 4096.

Modes

Spanning tree MSTP configuration mode

Usage Guidelines

The following rules apply:

VLANs must be created before mapping to instances.
The VLAN instance mapping is removed from the configuration if the underlying VLANs are deleted.

Enter no instance to remove the VLAN mapping from the MSTP instance.

Caution

This command can be used only after the VLAN is defined.

Examples

To map a VLAN to an MTSP instance:

device# configure terminal
device(config)# protocol spanning-tree mstp
device(conf-mstp)# instance 1 vlan 2,3 
device(conf-mstp)# instance 2 vlan 4-6 
device(conf-mstp)# instance 1 priority 4096