756 Spanning Tree CommandsCommand ModeInterface Configuration (gigabitethernet, port-channel, tengigabitethernet,fortygigabitethernet) modeUser GuidelinesMST instance id 0 is the common internal spanning tree instance (CIST).ExampleThe following example configures the MSTP instance 1 path cost forinterface 1/0/9 to 4.console(config)#interface gigabitethernet 1/0/9console(config-if-Gi1/0/9)#spanning-tree mst 1 cost 4spanning-tree mst port-priorityUse the spanning-tree mst port-priority command in Interface Configurationmode to configure port priority. To return to the default port priority, use theno form of this command.Syntaxspanning-tree mstinstance-id port-prioritypriorityno spanning-tree mstinstance-id port-priority•instance-id—ID of the spanning-tree instance. (Range: 1-4094)•priority—The port priority. (Range: 0-240 in multiples of 16.)Default ConfigurationThe default port-priority for IEEE STP is 128. The default priority for a port-channel is 96.Command ModeInterface Configuration (gigabitethernet, port-channel, tengigabitethernet,fortygigabitethernet) mode
