358 Spanning-Tree Commands
Example
The following example configures an MST region.
instance (mst)
The instance MST Configuration mode command maps VLANS to an MST instance.
Syntax
•
instance
instance-id
{add | remove} vlan
vlan-range
•
instance-ID —
ID of the MST instance. (Range: 1 - 16)
•
vlan-range —
VLANs to be added to or removed from the specified MST instance. To specify a
range of VLANs, use a hyphen. To specify a series of VLANs, use a comma. (Range: 1 - 4094)
Default Setting
VLANs are mapped to the common and internal spanning tree (CIST) instance (instance 0).
Command Modes
MST Configuration mode.
User Guidelines
• All VLANs that are not explicitly mapped to an MST instance are mapped to the common and internal
spanning tree (CIST) instance (instance 0) and cannot be unmapped from the CIST.
For two or more devices to be in the same MST region, they must have the same VLAN mapping, the
same configuration revision number, and the same name.
Example
The following example maps VLANs 10-20 to MST instance 1.
Console(config)# spanning-tree mst configuration
Console(config-mst) # instance 1 add vlan 10-20
Console(config-mst) # name region1
Console(config-mst) # revision 1
Console(config)# spanning-tree mst configuration
Console(config-mst)# instance 1 add vlan 10-20
5400_CLI.book Page 358 Wednesday, December 17, 2008 4:33 PM