Configuring Multiple Spanning Tree

Specifying the MST Name

 

Command or Action

Purpose

 

 

Synchronize primary and secondary VLANs in private

 

 

VLANs

Step 3

switch(config-mst)# exit or

The first form commits all the changes and exits MST

 

switch(config-mst)# abort

configuration mode.

 

 

The second form exits the MST configuration mode

 

 

without committing any of the changes.

Step 4

switch(config)# no

(Optional)

 

spanning-tree mst

Returns the MST region configuration to the following default

 

configuration

values:

 

 

The region name is an empty string.

 

 

No VLANs are mapped to any MST instance (all VLANs

 

 

are mapped to the CIST instance).

 

 

The revision number is 0.

Specifying the MST Name

You configure a region name on the bridge. For two or more bridges to be in the same MST region, they must have the identical MST name, VLAN-to-instance mapping, and MST revision number.

Procedure

 

Command or Action

Purpose

Step 1

switch# configure terminal

Enters configuration mode.

Step 2

switch(config)# spanning-tree mst

Enters MST configuration submode.

 

configuration

 

Step 3

switch(config-mst)# name name

Specifies the name for MST region. The name string

 

 

has a maximum length of 32 characters and is

 

 

case-sensitive. The default is an empty string.

This example shows how to set the name of the MST region:

switch# configure terminal

switch(config)# spanning-tree mst configuration switch(config-mst)# name accounting

Cisco Nexus 3000 NX-OS Layer 2 Switching Configuration Guide, Release 5.0(3)U3(1)

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Cisco Systems N3KC3064TFAL3, N3KC3048TP1GE Specifying the MST Name, Spanning-tree mst, Switchconfig# spanning-tree mst