Command Manual (For Soliton) – MSTPH3C S3100 Series Ethernet Switches Chapter 1 MSTP Configuration Commands1-50Examples# Enter MST region view. system-viewSystem View: return to User View with Ctrl+Z.[Sysname] stp region-configuration[Sysname-mst-region]1.1.45 stp root primarySyntaxstp [ instance instance-id ] root primary [ bridge-diameter bridgenum [ hello-timecenti-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 primary command to configure the current switch as the root bridgeof a specified MSTI.Use the undo stp root command to cancel the current configuration.By default, a switch is not configured as a root bridge.If you do not specify the instance-id argument, these two commands apply to only theCIST.You can specify the current switch as the root bridge of an MSTI regardless of thepriority of the switch. You can also specify the network diameter of the switchednetwork by using the stp root primary command. The switch will then figure out thefollowing three time parameters: hello time, forward delay, and max age. As the hellotime figured out by the network diameter is not always the optimal one, you can set itmanually through the hello-time centi-seconds parameter. Generally, you arerecommended to obtain the forward delay and max age parameters through setting thenetwork diameter.
