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1000 mbps (giga) — 20,000
100 mbps — 200,000
10 mbps — 2,000,000
Command Modes
Interface Configuration (Ethernet, port-channel) mode
User Guidelines
The method used (long or short) is set by using the spanning-tree pathcost method command.
Example
The following example configures the spanning-tree cost on g5 to 35000.
Console(config)# interface ethernet g5
Console(config-if)# spanning-tree cost 35000
3.21.9 spanning-tree port-priority
The spanning-tree port-priority interface configuration command configures port priority. To reset the default port
priority, use the no form of this command.
Syntax
spanning-tree port-priority priority
no spanning-tree port-priority
§
priority — The port priority. (Range: 0 - 240 in multiples of 16)
Default Configuration
The default port-priority for IEEE STP is 128.
Command Modes
Interface Configuration (Ethernet, port-channel) mode
User Guidelines
There are no user guidelines for this command.
Example
The following example configures the spanning priority on g5 to 96.
Console(config)# interface ethernet g5
Console(config-if)# spanning-tree port-priority 96
3.21.10 spanning-tree portfast
The spanning-tree portfast interface configuration command enables PortFast mode. In PortFast mode, the interface is
immediately put into the forwarding state upon linkup, without waiting for the timer to expire. To disable PortFast mode, use
the no form of this command.
Syntax
spanning-tree portfast
no spanning-tree portfast
Default Configuration
PortFast mode is disabled.
Command Modes
Interface Configuration (Ethernet, port-channel) mode
User Guidelines
This feature should be used only with interfaces connected to end stations. Otherwise, an accidental topology loop could
cause a data packet loop and disrupt switch and network operations.
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