Quick Reference Guide

382 Spanning-Tree Commands
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spanning-tree mst port-priority
The spanning-tree mst port-priority Interface Configuration mode command configures port
priority for the specified MST instance. Use the no form of this command to return to the default
configuration.
Syntax
• spanning-tree mst instance-id port-priority priority
• no spanning-tree mst instance-id port-priority
• instance-ID — ID of the Spanning Tree instance. (Range: 1 - 15)
•
priority — The port priority. (Range: 0 - 240 in multiples of 16)
Default Configuration
The default port priority for IEEE Multiple Spanning Tree Protocol (MSTP) is 128.
Command Mode
Interface Configuration (Ethernet, port-channel) mode.
User Guidelines
There are no user guidelines for this command.
Example
The following example configures the port priority of port 1/e1 for instance 1 to 142.
spanning-tree mst cost
The spanning-tree mst cost Interface Configuration mode command configures the path cost for
multiple Spanning Tree (MST) calculations. If a loop occurs, the Spanning Tree considers path cost
when selecting an interface to put in the forwarding state. Use the no form of this command to
return to the default configuration.
Syntax
• spanning-tree mst instance-id cost cost
• no spanning-tree mst instance-id cost
• instance-ID — ID of the spanning -tree instance. (Range: 1 - 15)
•
cost — The port path cost. (Range: 1 - 200,000,000)
Console(config)# interface ethernet 1/e1
Console(config-if)# spanning-tree mst 1 port-priority 142