452 | Per-VLAN Spanning Tree Plus (PVST+)w w w . d e l l . c o m | s u p p o r t . d e l l . c o mprotocol spanning-tree pvstEnter the PVST+ mode to enable PVST+ on a device.Syntax protocol spanning-tree pvstTo disable PVST+, use the disable command.Defaults This command has no default value or behavior.Command Modes CONFIGURATIONCommandHistoryExample Figure 24-2. Configuring with protocol spanning-tree pvst CommandUsageInformationOnce PVST+ is enabled, the device runs an STP instance for each VLAN it supports.RelatedCommandsshow spanning-tree pvstView the Per-VLAN Spanning Tree configuration.Syntax show spanning-tree pvst [vlan vlan-id] [brief] [guard]ParametersVersion 8.3.16.1 Introduced on MXL 10/40GbE Switch IO ModuleFTOS#confFTOS(conf)#protocol spanning-tree pvstFTOS(conf-pvst)#no disableFTOS(conf-pvst)#vlan 2 bridge-priority 4096FTOS(conf-pvst)#vlan 3 bridge-priority 16384FTOS(conf-pvst)#FTOS(conf-pvst)#show config!protocol spanning-tree pvstno disablevlan 2 bridge-priority 4096vlan 3 bridge-priority 16384FTOS#disable Disable PVST+.show spanning-tree pvst Display the PVST+ configuration.vlan vlan-id (OPTIONAL) Enter the keyword vlan followed by the VLAN ID.Range: 1 to 4094brief (OPTIONAL) Enter the keyword brief to view a synopsis of the PVST+configuration information.