Reference Guide

624 | Multiple Spanning Tree Protocol
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Table 32-2, "MSTP Default Port Cost Values," in Multiple Spanning Tree Protocol lists the default values
for port cost by interface.
To change the port cost or priority of an interface:
View the current values for these interface parameters using the command
show config from INTERFACE
mode. Refer to the example in Configure an EdgePort.
Table 32-2. MSTP Default Port Cost Values
Port Cost Default Value
100-Mb/s Ethernet interfaces 200000
1-Gigabit Ethernet interfaces 20000
10-Gigabit Ethernet interfaces 2000
Port Channel with 100 Mb/s Ethernet interfaces 180000
Port Channel with 1-Gigabit Ethernet interfaces 18000
Port Channel with 10-Gigabit Ethernet interfaces 1800
Task Command Syntax Command Mode
Change the port cost of an interface.
Range: 0 to 200000
Default: Refer to Table 32-2, "MSTP Default Port
Cost Values," in Multiple Spanning Tree Protocol.
spanning-tree msti number cost cost INTERFACE
Change the port priority of an interface.
Range: 0 to 240, in increments of 16
Default: 128
spanning-tree msti number priority
priority
INTERFACE