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Chapter 4 Command-Line Reference 4-113
Syntax
spanning-tree cost cost
no spanning-tree cost
cost – The path cost for the interface.
(Range – 1-200,000,000) The recommended range is -
Ethernet: 200,000-20,000,000
Fast Ethernet: 20,000-2,000,000
Gigabit Ethernet: 2,000-200,000
Default Setting
■ Ethernet – half duplex: 2,000,000; full duplex: 1,000,000; trunk: 500,000
■ Fast Ethernet – half duplex: 200,000; full duplex: 100,000; trunk: 50,000
■ Gigabit Ethernet – full duplex: 10,000; trunk: 5,000
Command Mode
Interface Configuration (Ethernet, Port Channel)
Command Usage
■ This command is used by the spanning-tree algorithm to determine the best
path between devices. Therefore, lower values should be assigned to interfaces
attached to faster media, and higher values assigned to interfaces with slower
media.
■ Path cost takes precedence over interface priority.
■ When the spanning-tree pathcost method is set to short, the maximum value
for path cost is 65,535.
Example
Console(config)#interface ethernet SNP5
Console(config-if)#spanning-tree cost 50
Console(config-if)#