Quick Reference Guide

Spanning-Tree Commands 383
DELL CONFIDENTIAL – PRELIMINARY 5/15/12 – FOR PROOF ONLY
Default Configuration
Default path cost is determined by port speed and path cost method (long or short) as shown
below:
Command Mode
Interface Configuration (Ethernet, port-channel) mode.
User Guidelines
There are no user guidelines for this command.
Example
The following example configures the MSTP instance 1 path cost for Ethernet port 1/e9 to 4.
spanning-tree mst configuration
The spanning-tree mst configuration Global Configuration mode command enables configuring
an MST region by entering the Multiple Spanning Tree (MST) mode.
Syntax
• spanning-tree mst configuration
Default Configuration
This command has no default configuration.
Command Mode
Global Configuration mode.
User Guidelines
All devices in an MST region must have the same VLAN mapping, configuration revision
number and name.
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/e9
Console(config-if) # spanning-tree mst 1 cost 4