Enabling GVRP GloballyTo configure GVRP globally, use the following command.• Enable GVRP for the entire switch.CONFIGURATION modegvrp enableExample of Configuring GVRPDell(conf)#protocol gvrpDell(config-gvrp)#no disableDell(config-gvrp)#show config!protocol gvrpno disableDell(config-gvrp)#To inspect the global configuration, use the show gvrp brief command.Enabling GVRP on a Layer 2 InterfaceTo enable GVRP on a Layer 2 interface, use the following command.• Enable GVRP on a Layer 2 interface.INTERFACE modegvrp enableExample of Enabling GVRP on an InterfaceDell(conf-if-te-1/21)#switchportDell(conf-if-te-1/21)#gvrp enableDell(conf-if-te-1/21)#no shutdownDell(conf-if-te-1/21)#show config!interface TenGigabitEthernet 1/21no ip addressswitchportgvrp enableno shutdownTo inspect the interface configuration, use the show config command from INTERFACE mode or use the show gvrp interfacecommand in EXEC or EXEC Privilege mode.Configure GVRP RegistrationConfigure GVRP registration.There are two GVRP registration modes:• Fixed Registration Mode — figuring a port in fixed registration mode allows for manual creation and registration of VLANs, preventsVLAN deregistration, and registers all VLANs known on other ports on the port. For example, if an interface is statically configured viathe CLI to belong to a VLAN, it should not be unconfigured when it receives a Leave PDU. Therefore, the registration mode on thatinterface is FIXED.• Forbidden Mode — Disables the port to dynamically register VLANs and to propagate VLAN information except information aboutVLAN 1. A port with forbidden registration type thus allows only VLAN 1 to pass through even though the PDU carries information formore VLANs. Therefore, if you do not want the interface to advertise or learn about particular VLANS, set the interface to theregistration mode of FORBIDDEN.GARP VLAN Registration Protocol (GVRP) 361
