Operation Manual – MSTPH3C S7500 Series Ethernet Switches Chapter 1 MSTP Configuration1-8Task RemarksMSTP ConfigurationRequiredTo prevent network topology jitter caused byother related configurations, you arerecommended to enable MSTP after otherrelated configurations are performed.MST Region Configuration RequiredRoot Bridge/Secondary RootBridge Configuration RequiredBridge Priority ConfigurationOptionalThe priority of a switch cannot be changedafter the switch is specified as the root bridgeor a secondary root bridge.MSTP Operation ModeConfiguration OptionalMST Region Maximum HopsConfiguration OptionalNetwork Diameter Configuration OptionalThe default is recommended.MSTP Time-related Configuration OptionalThe defaults are recommended.Timeout Time Factor Configuration OptionalMaximum Transmitting SpeedConfigurationOptionalThe default is recommended.Edge Port Configuration OptionalPoint-to-point Link-RelatedConfiguration OptionalNote:In a network that contains switches with both GARP VLAN registration protocol (GVRP)and MSTP employed, GVRP packets are forwarded along the CIST. If you want tobroadcast packets of a specific VLAN through GVRP, be sure to map the VLAN to theCIST when configuring the MSTP VLAN mapping table (The CIST of a network is theMSTI numbered 0.)1.2.1 Configuration PrerequisitesThe status of the switches in the spanning trees are determined. That is, the status(root, branch, or leaf) of each switch in each MSTI is determined.