Layer 2 Switching Commands 757console (config-mst)#name region1console (config-mst)#revision 1spanning-tree mst costUse the spanning-tree mst cost command in Interface Configuration modeto configure the internal path cost for multiple spanning tree (MST)calculations. If a loop occurs, the spanning tree considers path cost whenselecting an interface to put in the forwarding state. To return to the defaultport path cost, use the no form of this command.Syntaxspanning-tree mst instance-id cost costno spanning-tree mst instance-id cost• instance-ID — ID of the spanning -tree instance. (Range: 1-4094)• cost — The port path cost. (Range: 0–200,000,000)Default ConfigurationThe default cost is 0, which signifies that the cost will be automaticallycalculated 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• Port-Channel — 20,000Command ModeInterface Configuration (gigabitethernet, port-channel, tengigabitethernet,fortygigabitethernet) modeUser GuidelinesUse the spanning-tree cost command to configure MST instance 0 (thecommon spanning tree instance). Use the show spanning-tree activecommand to display the spanning tree costs.
