Cisco Nexus 5000 Series Switch CLI Software Configuration Guide, NX-OS 4.0(1a)N1 (OL-16597-01, January 2009)

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9-12
Cisco Nexus 5000 Series Switch CLI Software Configuration Guide
OL-16597-01
Chapter 9 Configuring MST
Configuring MST
To enter MST configuration mode, perform this task (note the difference between exit and abort):
This example shows how to enter MST configuration submode on the switch:
switch# configure terminal
switch(config)# spanning-tree mst configuration
This example shows how to commit the changes and leave MST configuration submode on the switch:
sswitch(config-mst)# exit
This example shows how to leave MST-submode configuration on the switch without committing the
changes:
sswitch(config-mst)# abort
To disable MST configuration mode, perform this task:
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.
Command Purpose
Step 1
switch# configure terminal
Enters configuration mode.
Step 2
switch(config)# spanning-tree mst
configuration
Enters MST configuration submode on the system.
You must be in the MST configuration submode to
assign the MST configuration parameters, as follows:
• MST name
• Instance-to-VLAN mapping
• MST revision number
• Synchronize primary and secondary VLANs in
private VLANs
Step 3
switch(config-mst)# exit
Commits all the changes and exits MST configuration
submode.
switch(config-mst)# abort
Exits the MST configuration submode without
committing any of the changes.
Command Purpose
switch(config-mst)# no spanning-tree mst
configuration
Returns the MST region configuration to the
following default 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.