Layer 2 Switching Commands 461User GuidelinesThis command is available in Ethernet interface configuration mode and portchannel interface configuration mode. An Access port cannot joindynamically to a VLAN because it is always a member of only one VLAN.Membership in untagged VLAN would be propagated in a same way as atagged VLAN. In such cases it is the administrator’s responsibility to set thePVID to be the untagged VLAN VID.ExampleThe following example enables GVRP on Gigabit Ethernet 1/0/8.console(config)#interface gigabitethernet 1/0/8console(config-if-Gi1/0/8)#gvrp enablegvrp registration-forbidUse the gvrp registration-forbid command in Interface Configuration modeto deregister all VLANs on a port and prevent any dynamic registration on theport. To allow dynamic registering for VLANs on a port, use the no form ofthis command.Syntaxgvrp registration-forbidno gvrp registration-forbidDefault ConfigurationDynamic registering and deregistering for each VLAN on the port is notforbidden.Command ModeInterface Configuration (gigabitethernet, port-channel, tengigabitethernet,fortygigabitethernet) modeUser GuidelinesThis command is available in Ethernet interface configuration mode and portchannel interface configuration mode.
