Administrator Guide

To inspect the global configuration, use the show gvrp brief command.
Enabling GVRP on a Layer 2 Interface
To enable GVRP on a Layer 2 interface, use the following command.
• Enable GVRP on a Layer 2 interface.
INTERFACE mode
gvrp enable
Dell(conf-if-te-1/21)#switchport
Dell(conf-if-te-1/21)#gvrp enable
Dell(conf-if-te-1/21)#no shutdown
Dell(conf-if-te-1/21)#show config
!
interface TenGigabitEthernet 1/21
no ip address
switchport
gvrp enable
no shutdown
To inspect the interface configuration, use the show config command from INTERFACE mode or use the show gvrp interface
command in EXEC or EXEC Privilege mode.
Configure GVRP Registration
Configure 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 statically configured via
the CLI to belong to a VLAN, it should not be unconfigured when it receives a Leave PDU. Therefore, the registration mode on that
interface is FIXED.
• Forbidden Mode — Disables the port to dynamically register VLANs and to propagate VLAN information except information about
VLAN 1. A port with forbidden registration type thus allows only VLAN 1 to pass through even though the PDU carries information for
more VLANs. Therefore, if you do not want the interface to advertise or learn about particular VLANS, set the interface 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 a
GVRP Leave message. Additionally, the interface is not dynamically added to VLAN 45 or VLAN 46, even if a GVRP Join message is
received.
Example of the gvrp registration Command
Dell(conf-if-te-1/21)#gvrp registration fixed 34,35
Dell(conf-if-te-1/21)#gvrp registration forbidden 45,46
Dell(conf-if-te-1/21)#show conf
!
interface TenGigabitEthernet 1/21
no ip address
switchport
gvrp enable
gvrp registration fixed 34-35
gvrp registration forbidden 45-46
no shutdown
Dell(conf-if-te-1/21)#
Configure a GARP Timer
Set GARP timers to the same values on all devices that are exchanging information using GVRP.
There are three GARP timer settings.
• Join — A GARP device reliably transmits Join messages to other devices by sending each Join message two times. To define the
interval between the two sending operations of each Join message, use this parameter. The default is 200ms.
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GARP VLAN Registration Protocol (GVRP)