Spanning-Tree Mst - Cisco 4500M Command Reference Manual

spanning-tree mst

spanning-tree mst
To set the path cost and port-priority parameters for any MST instance (including the CIST with instance
ID0), use the spanning-tree mst command. To return to the default settings, use the no form of this
command.
Syntax Description
instance-id
cost cost
port-priority prio
Defaults
Port priority is 128.
Command Modes
Interface configuration
Command History Release
12.1(12c)EW
Usage Guidelines
Higher cost cost values indicate higher costs. When entering the cost value, do not include a comma in
the entry; for example, enter 1000, not 1,000.
Higher port-priority prio values indicate smaller priorities.
By default, cost depends on the port speed; faster interface speeds indicate smaller costs. MST always
uses long path costs.
Examples
This example shows how to set the interface path cost:
Switch(config-if)# spanning-tree mst 0 cost 17031970
Switch(config-if)#
This example shows how to set the interface priority:
Switch( config-if)# spanning-tree mst 0 port-priority 64
Switch( config-if)#
Related Commands
show spanning-tree mst
spanning-tree port-priority
Catalyst4500 Series SwitchCiscoIOS Command Reference—Release 12.2(18)EW
2-430
spanning-tree mst instance-id [cost cost] | [port-priority prio]
no spanning-tree mst instance-id {cost | port-priority}
Instance ID number; valid values are from 0 to 15.
(Optional) Specifies the path cost for an instance; valid values are from
1 to200000000.
(Optional) Specifies the port priority for an instance; valid values are from 0
to 240 in increments of 16.
Modification
Support for this command was introduced on the Catalyst 4500 series switch.
Chapter2 Cisco IOS Commands for the Catalyst 4500 Series Switches
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