Reference Guide

Usage Information A device receiving BPDUs waits until the max-hops value expires before discarding it. When a device receives the
BPDUs, it decrements the received value of the remaining hops and uses the resulting value as remaining-hops in
the BPDUs. If the remaining MSTP 1333 hops reach zero, the device discards the BPDU and ages out any
information that it holds for the port. The command conguration applies to all common IST (CIST) in the MST
region.
Example
OS10(config)# spanning-tree mst max-hops 30
Supported Releases 10.2.0E or later
instance
Congures MST instances and one or multiple VLANs mapped to the MST instance.
Syntax
instance instance-number {vlan vlan-range}
Parameters
• instance — Enter an MST instance value (0 to 63).
• vlan range — Enter a VLAN range value (1 to 4094).
Default Not congured
Command Mode MULTIPLE-SPANNING-TREE
Usage Information By default, all VLANs map to MST instance zero (0) unless you are using the vlan range command to map the
VLANs to a non-zero instance. The no version of this command removes all the instance related conguration.
Example
OS10(conf-mst)# instance 1 vlan 2-10
OS10(conf-mst)# instance 2 vlan 11-20
OS10(conf-mst)# instance 3 vlan 21-30
Supported Releases 10.2.0E or later
name
Assigns a name to the MST region.
Syntax
name region-name
Parameters region-name — Enter a name for an MST region (up to 32 characters).
Default System MAC address
Command Mode MULTIPLE-SPANNING-TREE
Usage Information By default, MST protocol assigns system MAC as the region name. Two MST devices within the same region must
share the same region name, including matching case.
Example
OS10(conf-mst)# name my-mst-region
Supported Releases 10.2.0E or later
178 Layer 2