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308
Spanning-Tree Commands
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DELL CONFIDENTIAL – PRELIMINARY 9/13/06 – FOR PROOF ONLY
Default Configuration
Default path cost is determined by port speed and path cost method (long or short) as shown
below:
Command Modes
Interface Configuration (Ethernet, port-channel) mode
User Guidelines
•
The path cost method is configured using the
spanning-tree pathcost method
Global
Configuration mode command.
Example
The following example configures the spanning-tree cost on Ethernet port 1/e15 to 35000.
s
p
anning-t
r
ee
p
o
r
t-
pr
io
r
ity
The
spanning-tree port-priority
Interface Configuration mode command configures port
priority. To return to the default configuration, use the
no
form of this command.
Syntax
spanning-tree port-priority
priority
no spanning-tree port-priority
•
priority
— The priority of the port. (Range: 0 - 240 in multiples of 16)
Default Configuration
The default port priority for IEEE Spanning TreeProtocol (STP) is 128.
Command Modes
Interface Configuration (Ethernet, port-channel) mode
Interface
Long
Short
Port-channel
20,000
4
Gigabit Ethernet (1000 Mbps)
20,000
4
Fast Ethernet (100 Mbps)
200,000
19
Ethernet (10 Mbps)
2,000,000
100
Console(config)#
interface ethernet
1/e15
Console(config-if)#
spanning-tree cost
35000