Installation manual

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Cisco MWR 2941 Mobile Wireless Edge Router Release 3.5 Command Reference, Cisco IOS Release 15.1(3)MR
OL-26895-01
Chapter Cisco MWR 2941 Router Command Reference, Release 15.1(3)MR
spanning-tree mst
spanning-tree mst
To set the path cost and port-priority parameters for any Multiple Spanning Tree (MST) instance (including
the Common and Internal Spanning Tree [CIST] with instance ID 0), use the spanning-tree mst command
in interface configuration mode. To return to the default settings, use the no form of this command.
spanning-tree mst instance-id {{cost cost | port-priority priority} | pre-standard}
no spanning-tree mst instance-id {{cost | port-priority} | pre-standard}
Syntax Description
Command Default The defaults are as follows:
• cost depends on the port speed; the faster interface speeds indicate smaller costs. MST always uses
long path costs.
• priority is 128.
Command Modes Interface configuration (config-if)
Command History
Usage Guidelines Higher cost cost values indicate higher costs. When entering the cost, do not include a comma in the
entry; for example, enter 1000, not 1,000.
Higher port-priority prio values indicate smaller priorities.
Examples This example shows how to set the interface path cost:
Router(config-if)# spanning-tree mst 0 cost 17031970
Router(config-if)#
This example shows how to set the interface priority:
Router(config-if)# spanning-tree mst 0 port-priority 64
instance-id Instance ID number; valid values are from 0 to 15.
cost cost Path cost for an instance; valid values are from 1 to 200000000.
port-priority
priority
Port priority for an instance; valid values are from 0 to 240 in increments of 16.
pre-standard Configures pre-standard MST BPDU transmission on the interface.
Release Modification
12.2(14)SX Support for this command was introduced on the Supervisor Engine 720.
12.2(17d)SXB Support for this command on the Supervisor Engine 2 was extended to
Release 12.2(17d)SXB.
12.2(33)SRA This command was integrated into Cisco IOS Release 12.2(33)SRA.
15.0(1)MR This command was integrated into 15.0(1)MR.