Huawei Quidway S6500 Series Operation Manual page 78

Operation Manual - VLAN
Quidway S6500 Series Ethernet Switches
Chapter 2 GARP/GVRP Configuration
2.1 Configure GARP
2.1.1 GARP Overview
Generic Attribute Registration Protocol (GARP) offers a mechanism that is used by the
members in the same switching network to distribute, propagate and register such
information as VLAN and multicast addresses.
GARP dose not exist in a switch as an entity. A GARP participant is called GARP
application. The main GARP applications at present are GVRP and GMRP. GVRP is
described in the GVRP Configuration section and GMRP will be described in Multicast
Configuration. When a GARP participant is on a port of the switch, each port
corresponds to a GARP participant.
Through GARP mechanism, the configuration information on one GARP member will
be advertised rapidly in the whole switching network. 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 the
received declarations/withdrawal declarations.
GARP members exchange information through sending messages. There mainly are 3
types of GARP messages including Join, Leave, and LeaveAll.
When a GARP participant wants to register its attribute information on other
switches, it will send Join message outward.
When it wants to remove some attribute values from other switches, it will send
Leave message.
LeaveAll timer will be started at the same time when each GARP participant is
enabled and LeaveAll message will be sent upon timeout.
Leave message and LeaveAll message cooperate to ensure the logout and the
re-registration of a message. Through exchanging messages, all the attribute
information to be registered can be propagated to all the switches in the same switching
network.
The destination MAC addresses of the packets of the GARP participants are specific
multicast MAC addresses. A GARP-supporting switch will classify the packets received
from the GARP participants and process them with corresponding GARP applications
(GVRP or GMRP).
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Chapter 2 GARP/GVRP Configuration