3Com Comprehensive Guide to Configuring GARP and GVRP in Switching Networks

		Configuring GARP/GVRP 61
	vlan	Specify current hybrid port's VLAN ID
	[SW7750-GigabitEthernet1/0/1]port hybrid protocol
	[SW7750-GigabitEthernet1/0/1]port hybrid protocol-vlan 2 0
	[SW7750-GigabitEthernet1/0/1]port hybrid protocol-vlan 3 0
	[SW7750-GigabitEthernet1/0/1]display th
	#
	interface GigabitEthernet1/0/1
	port link-type hybrid
	port hybrid vlan 2 to 3 tagged
	port hybrid vlan 1 untagged
	port hybrid protocol-vlan 2 0
	port hybrid protocol-vlan 3 0
	#
	return
	4 Configure port G1/0/3 as VLAN 3 and port G1/0/2 as VLAN 2
	[SW7750]vlan 3
	[SW7750-vlan3]port g1/0/3
	[SW7750-vlan3]vlan 2
	[SW7750-vlan2]port g1/0/2
Configuring	Generic Attribute Registration Protocol (GARP), allows members in the same
GARP/GVRP	switching network to distribute, propagate, and register information, such as
	VLAN and multicast addresses.

GARP does not exist in a switch as an entity. A GARP participant is called a GARP application. The main GARP applications are GVRP and GMRP. GVRP is described in Configuring GARP/GVRP and GMRP is described in “GMRP” on page 146.

When a GARP participant is on a port of the switch, each port corresponds to a GARP participant.

Through GARP, configuration information on one GARP member is advertised rapidly to the entire switching network. A GARP member can be a terminal workstation or bridge. A GARP member can notify other members to register or remove its attribute information by sending declarations or withdrawal declarations. It can also register or remove the attribute information of other GARP members according to declarations or withdrawal declarations that it receives from them.

GARP members exchange information by sending GARP messages. There are three main types of GARP messages, including join, leave, and leaveall. When a GARP participant wants to register its attribute information on other switches, it sends a