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 gvrpinterface command 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,prevents VLAN deregistration, and registers all VLANs known on other ports on the port. For example, if an interface is staticallyconfigured via the CLI to belong to a VLAN, it should not be unconfigured when it receives a Leave PDU. Therefore, theregistration mode on that interface is FIXED.• Forbidden Mode — Disables the port to dynamically register VLANs and to propagate VLAN information except informationabout VLAN 1. A port with forbidden registration type thus allows only VLAN 1 to pass through even though the PDU carriesinformation for more VLANs. Therefore, if you do not want the interface to advertise or learn about particular VLANS, set theinterface to the registration mode of FORBIDDEN.Based on the configuration in the following example, the interface 1/21 is not removed from VLAN 34 or VLAN 35 despite receiving aGVRP Leave message. Additionally, the interface is not dynamically added to VLAN 45 or VLAN 46, even if a GVRP Join message isreceived.Example of the gvrp registration CommandDell(conf-if-te-1/21)#gvrp registration fixed 34,35Dell(conf-if-te-1/21)#gvrp registration forbidden 45,46Dell(conf-if-te-1/21)#show confGARP VLAN Registration Protocol (GVRP) 339
