Command Manual (For Soliton) – MSTPH3C S3100 Series Ethernet Switches Chapter 1 MSTP Configuration Commands1-51Caution:z You can configure only one root bridge for an MSTI and can configure one or moresecondary root bridges for an MSTI. Specifying multiple root bridges for an MSTIcauses unpredictable spanning tree calculation results.z Once a switch is configured as the root bridge or a secondary root bridge, its prioritycannot be modified.Examples# Configure the current switch as the root bridge of MSTI 1, set the network diameter ofthe switched network to 4, and set the hello time to 500 centiseconds. system-viewSystem View: return to User View with Ctrl+Z.[Sysname] stp instance 1 root primary bridge-diameter 4 hello-time 5001.1.46 stp root secondarySyntaxstp [ instance instance-id ] root secondary [ bridge-diameter bridgenum[ hello-time centi-seconds ] ]undo stp [ instance instance-id ] rootViewSystem viewParametersinstance-id: MSTI ID ranging from 0 to 16. The value of 0 refers to the CIST.bridgenum: Network diameter of the specified spanning tree. This argument rangesfrom 2 to 7 and defaults to 7.centi-seconds: Hello time in centiseconds of the specified spanning tree. This argumentranges from 100 to 1,000 and defaults to 200.DescriptionUse the stp root secondary command to configure the current switch as a secondaryroot bridge of a specified MSTI.Use the undo stp root command to cancel the current configuration.By default, a switch does not operate as a secondary root bridge.
