746 Spanning Tree Commands
console(config)#spanning-tree bpdu-protection
spanning-tree cost
Use the spanning-tree cost command in Interface Configuration mode to
configure the external spanning-tree path cost for a port. To return to the
default port path cost, use the no form of this command.
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 (gigabitethernet, port-channel, tengigabitethernet,
fortygigabitethernet) mode
User Guidelines
This command configures the external cost. Since by default each switch is in
its own region, the external cost is considered in determining the spanning
tree of the network.
This command is also used to configure the rstp path cost.
Example
The following example configures the spanning-tree cost on 1/0/5 to 35000.
2CSPC4.X8100-SWUM102.book Page 746 Friday, March 15, 2013 8:56 AM