Dell PowerConnect 6248P Command Line Interface Guide - Page 552

User Guidelines For two or more switches to be in the same MST region, they must have the same VLAN mapping, the same configuration revision number and the same name. Example The following example configures an MST region. console (config)#spanning-tree mst configuration console (config-mst)#instance 1 add vlan 10-20 console (config-mst)#name region1 console (config-mst)#revision 1 spanning-tree mst cost Use the spanning-tree mst cost command in Interface Configuration mode to configure the path cost for multiple spanning tree (MST) calculations. If a loop occurs, the spanning tree considers path cost when selecting an interface to put in the forwarding state. To return to the default port path cost, use the no form of this command. Syntax spanning-tree mst instance-id cost cost no spanning-tree mst instance-id cost • instance-ID - ID of the spanning -tree instance. (Range: 1-15) • cost - The port path cost. (Range: 0-200,000,000) Default Configuration The default value is 0, which signifies that the cost will be automatically calculated based on port speed. The default configuration is: • Ethernet (10 Mbps) - 2,000,000 • Fast Ethernet (100 Mbps) - 200,000 • Gigabit Ethernet (1000 Mbps) - 20,000 552 Spanning Tree Commands