Mapping And Unmapping Vlans To Mst Instances - Cisco Nexus 5000 Series Configuration Manual

Mapping and Unmapping VLANs to MST Instances

Command or Action
Step 4 switch(config-mst)# name name
Step 5 switch(config-mst)# revision version
To return to defaults, do the following:
• To return to the default MST region configuration settings, enter the no spanning-tree mst configuration
• To return to the default VLAN-to-instance map, enter the no instance instance-id vlan vlan-range
• To return to the default name, enter the no name MST configuration command.
• To return to the default revision number, enter the no revision MST configuration command.
• To reenable Rapid PVST+, enter the no spanning-tree mode or the spanning-tree mode rapid-pvst
This example shows how to enter MST configuration mode, map VLANs 10 to 20 to MST instance 1, name
the region region1, set the configuration revision to 1, display the pending configuration, apply the changes,
and return to global configuration mode:
switch(config)# spanning-tree mst configuration
switch(config-mst)# instance 1 vlan 10-20
switch(config-mst)# name region1
switch(config-mst)# revision 1
switch(config-mst)# show pending
Pending MST configuration
Name
Revision
Instances configured 2
Instance
--------
0
1
-------------------------------
Mapping and Unmapping VLANs to MST Instances
When you change the VLAN-to-MSTI mapping, the system restarts MST.
Caution
Note You cannot disable an MSTI.
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.
Cisco Nexus 5000 Series NX-OS Layer 2 Switching Configuration Guide, Release 5.0(3)N1(1)
186
Purpose
Specifies the instance name. The name string has a maximum length of 32
characters and is case sensitive.
Specifies the configuration revision number. The range is from 0 to 65535.
configuration command.
MST configuration command.
global configuration command.
[region1]
1
Vlans Mapped
---------------------
1-9,21-4094
10-20
Configuring Multiple Spanning Tree