Cisco Nexus 5000 Series Switch CLI Software Configuration Guide (OL-16597-01, July 2009)

PurposeCommand or Action
Specifies the instance name. The name string has a maximum
length of 32 characters and is case sensitive.
switch(config-mst)# name
name
Step 4
Specifies the configuration revision number. The range is from
0 to 65535.
switch(config-mst)# revision
version
Step 5
To return to defaults, do the following:
• To return to the default MST region configuration settings, enter the no spanning-tree mst configuration
configuration command.
•
To return to the default VLAN-to-instance map, enter the no instance instance-id vlan vlan-range
MST configuration command.
• 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
global configuration command.
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 [region1]
Revision 1
Instances configured 2
Instance Vlans Mapped
-------- ---------------------
0 1-9,21-4094
1 10-20
-------------------------------
Mapping and Unmapping VLANs to MST Instances
When you change the VLAN-to-MSTI mapping, the system restarts MST.Caution
You cannot disable an MSTI.Note
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 Switch CLI Software Configuration Guide
OL-16597-01 187
Configuring MST
Mapping and Unmapping VLANs to MST Instances