Multiple Spanning Tree Protocol as defined in IEEE802.1s or IEEE802.1Q-2005 provides the ability to manage multiple VLANs from a single MST instance. MST allows the formation of MST regions that can run multiple MST instances (MSTIs). Multiple regions and other STP bridges are interconnected using one single Common Spanning Tree (CST).

Syntax   mst-config-modify instance-id id vlans vlan-list bridge-priority bridge-priority-number

instance-id id

Specify an ID for the MST configuration. This is a number between 0 and 63.

vlans vlan-list

Specify the list of VLANs associated with the MST configuration.

bridge-priority bridge-priority-number

Specify the bridge priority for the MST configuration. The bridge priority is a value from 0 to 65536, with a default value of 0. The value increments by 4096 each time. So for example, values can be 0, 4096, 8192, up to 65536.

Defaults   None

Access   CLI

History   Command introduced in Version 2.4.

Usage   This command is used to modify information about a MST configuration on the switch.

Examples  To modify a MST configuration with the ID 10, VLANs 13-16, and bridge-priority of 4096, use the following syntax:

CLI network-admin@switch > mst-config-modify instance-id 10 vlans 13-16 bridge-priority 4096

See Also