752 Spanning Tree Commands
•

cost —

The port path cost. (Range: 0–200,000,000)
Default Configuration
The default value is 0, which signifies that the cost will be automatically
calculated based on port speed.
The default configuration is:
• Ethernet (10 Mbps)

—

2,000,000
• Fast Ethernet (100 Mbps)

—

200,000
• Gigabit Ethernet (1000 Mbps)

—

20,000
•Port-Channel

—

20,000
Command Mode
Interface Configuration (gigabitethernet, port-channel, tengigabitethernet)
mode
User Guidelines
MST instance id 0 is the common internal spanning tree instance (CIST).
Example
The following example configures the MSTP instance 1 path cost for
interface 1/0/9 to 4.
console(config)#interface gigabitethernet 1/0/9
console(config-if-1/0/9)#spanning-tree mst 1 cost 4
spanning-tree mst port-priority
Use the spanning-tree mst port-priority command in Interface Configuration
mode to configure port priority. To return to the default port priority, use the
no form of this command.
Syntax
spanning-tree mst
instance-id
port-priority
priority
no spanning-tree mst
instance-id
port-priority
2CSPC4.XCT-SWUM2XX1.book Page 752 Monday, October 3, 2011 11:05 AM