Specifying The Configuration On An Mst Region - Cisco Nexus 5000 Series Configuration Manual

Configuring Multiple Spanning Tree
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.
SUMMARY STEPS
1. switch# configure terminal
2. switch(config)# spanning-tree mst configuration
3. switch(config-mst)# instance instance-id vlan vlan-range
4. switch(config-mst)# name name
5. switch(config-mst)# revision version
DETAILED STEPS
Command or Action
Step 1 switch# configure terminal
Step 2 switch(config)# spanning-tree mst
configuration
Step 3 switch(config-mst)# instance
instance-id vlan vlan-range
Purpose
Enters configuration mode.
Enters MST configuration submode.
Maps VLANs to an MST instance as follows:
• 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 NX-OS Layer 2 Switching Configuration Guide, Release 5.0(3)N1(1)
Specifying the Configuration on an MST Region
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