Changing the Region Name or RevisionTo change the region name or revision, use the following commands.• Change the region name.PROTOCOL MSTP modename name• Change the region revision number.PROTOCOL MSTP moderevision numberExample of the name CommandTo view the current region name and revision, use the show spanning-tree mst configurationcommand from EXEC Privilege mode.Dell(conf-mstp)#name my-mstp-regionDell(conf-mstp)#exitDell(conf)#do show spanning-tree mst configMST region name: my-mstp-regionRevision: 0MSTI VID1 1002 200-300Modifying Global ParametersThe root bridge sets the values for forward-delay, hello-time, max-age, and max-hops and overwrites thevalues set on other MSTP bridges.• Forward-delay — the amount of time an interface waits in the Listening state and the Learning statebefore it transitions to the Forwarding state.• Hello-time — the time interval in which the bridge sends MSTP bridge protocol data units (BPDUs).• Max-age — the length of time the bridge maintains configuration information before it refreshes thatinformation by recomputing the MST topology.• Max-hops — the maximum number of hops a BPDU can travel before a receiving switch discards it.NOTE: Dell Networking recommends that only experienced network administrators change MSTPparameters. Poorly planned modification of MSTP parameters can negatively affect networkperformance.To change the MSTP parameters, use the following commands on the root bridge.1. Change the forward-delay parameter.PROTOCOL MSTP modeforward-delay secondsThe range is from 4 to 30.The default is 15 seconds.2. Change the hello-time parameter.Multiple Spanning Tree Protocol (MSTP) 583
