Cisco Nexus 5000 Series Switch CLI Software Configuration Guide (OL-16597-01, July 2009)
Procedure
PurposeCommand or Action
Enters configuration mode.switch# configure terminal
Step 1
Enters MST configuration submode.switch(config)# spanning-tree mst
configuration
Step 2
Specifies the revision number for the MST region.
The range is from 0 to 65535, and the default
value is 0.
switch(config-mst)# revision version
Step 3
This example shows how to configure the revision number of the MSTI region for 5:
switch# configure terminal
switch(config)# spanning-tree mst configuration
switch(config-mst)# revision 5
Specifying the Configuration on an MST Region
For two or more switches to be in the same MST region, they must have the same VLAN-to-instance mapping,
the same configuration revision number, and the same MST name.
A region can have one member or multiple members with the same MST configuration; each member must
be capable of processing IEEE 802.1w RSTP BPDUs. There is no limit to the number of MST regions in a
network, but each region can support only up to 65 MST instances. You can assign a VLAN to only one MST
instance at a time.
Procedure
PurposeCommand or Action
Enters configuration mode.switch# configure terminal
Step 1
Enters MST configuration submode.switch(config)# spanning-tree
mst configuration
Step 2
Maps VLANs to an MST instance as follows:switch(config-mst)# instance
instance-id vlan vlan-range
Step 3
•
For instance-id , the range is from 1 to 4094.
•
For vlan vlan-range , the range is from 1 to 4094.
When you map VLANs to an MST instance, the mapping is
incremental, and the VLANs specified in the command are added
to or removed from the VLANs that were previously mapped.
To specify a VLAN range, enter a hyphen; for example, enter
the instance 1 vlan 1-63 command to map VLANs 1 through
63 to MST instance 1.
To specify a VLAN series, enter a comma; for example, enter
the instance 1 vlan 10, 20, 30 command to map VLANs 10,
20, and 30 to MST instance 1.
Cisco Nexus 5000 Series Switch CLI Software Configuration Guide
186 OL-16597-01
Configuring MST
Specifying the Configuration on an MST Region