64• On a trunk or hybrid port, the PVST mode is compatible with any other spanning tree mode in onlyVLAN 1.Follow these steps to set the spanning tree mode:To do… Use the command… RemarksEnter system view system-view —Set the spanning tree mode stp mode { mstp | pvst | rstp | stp }RequiredThe default setting is MSTPmode.NOTE:Whether you need to specify the MSTI or VLAN for the spanning tree configuration varies with thespanning tree modes.• In STP or RSTP mode, do not specify any MSTI or VLAN. Otherwise, the spanning tree configuration isineffective.• In MSTP mode, if you specify an MSTI, the spanning tree configuration is effective for the specified MSTI.If you specify a VLAN list, the spanning tree configuration is ineffective. If you do not specify any MSTIor VLAN, the spanning tree configuration is effective for the CIST.• In PVST mode, if you specify a VLAN list, the spanning tree configuration is effective for the specifiedVLANs. If you do not specify any VLAN, the spanning tree configuration is ineffective.Configuring an MST regionFollow these steps to configure an MST region:To do… Use the command… RemarksEnter system view system-view —Enter MST region view stp region-configuration —Configure the MST region name region-name nameOptionalThe MST region name is the MACaddress by default.Configure the VLAN-to-instancemapping tableinstance instance-id vlan vlan-listOrvlan-mapping modulo moduloOptionalUse one of the commands.All VLANs in an MST region aremapped to the CIST (or MSTI 0) bydefault.Configure the MSTP revision level ofthe MST region revision-level level OptionalThe default setting is 0.Display the MST regionconfigurations that are notactivated yetcheck region-configuration OptionalActivate MST region configurationmanually active region-configuration Required
