544 Spanning Tree Commands
spanning-tree cost
Use the spanning-tree cost command in Interface Configuration mode to
configure the spanning-tree path cost for a port. To return to the default port
path cost, use the no form of this command.
The command "spanning-tree mst 0 external-cost" on page 550 is used to set path
cost for rstp.
Syntax
spanning-tree cost
cost
no spanning-tree cost
•
cost
— The port path cost. (Range: 0–200,000,000)
Default Configuration
The default cost is 0, which signifies that the cost is automatically calculated
based on port speed.
•
10G Port path cost
— 2000
•
Port Channel
— 20,000
•
1000 mbps (giga)
— 20,000
•
100 mbps
— 200,000
•
10 mbps
— 2,000,000
Command Mode
Interface Configuration (Ethernet, Port-Channel) mode
User Guidelines
There are no user guidelines for this command.
Example
The following example configures the spanning-tree cost on 1/g5 to 35000.
console(config)#interface ethernet 1/g5
console(config-if-1/g5)#spanning-tree cost 35000