H3C Technologies H3C S7500E Series Switches - Manual (Page 259)

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GVRP Configuration
The GARP VLAN Registration Protocol (GVRP) is a GARP application. It functions based on the
operating mechanism of GARP to maintain and propagate dynamic VLAN registration information for
the GVRP devices on the network.
When configuring GVRP, go to these sections for information you are interested in:
Introduction to GVRP
Configuring GVRP
Displaying and Maintaining GVRP
GVRP Configuration Examples
Introduction to GVRP
GARP
The Generic Attribute Registration Protocol (GARP) provides a mechanism that allows participants in a
GARP application to distribute, propagate, and register with other participants in a LAN the attributes
specific to the GARP application, such as the VLAN or multicast address attribute.
GARP itself does not exist on a device as an entity. GARP-compliant participants are known as GARP
applications. One example is GVRP. When a GARP participant is present on a port on your device, the
port is regarded as a GARP participant.
GARP messages and timers
1) GARP messages
A GARP participant exchanges information with other GARP participants by sending the following
three types of messages:
Join messages to register with other entities its attributes, the attributes received from other GARP
application entities, and the attributes manually configured on it.
Leave messages to have its attributes deregistered on other devices. A GARP participant also
sends Leave messages when it receives Leave messages from other GARP participants or when
attributes are manually deregistered on it.
LeaveAll messages to deregister all the attributes so that all GARP participants can re-register all
attributes with each other. A LeaveAll message is sent upon expiration of a LeaveAll timer, which
starts upon the startup of a GARP application entity.
Join messages, Leave messages, and LeaveAll message make sure the reregistration and
deregistration of GARP attributes are performed in an orderly way.
Through message exchange, all attribute information that needs registration propagates to all GARP
participants on the LAN.
2) GARP timers
GARP uses the following four timers to set the interval for sending GARP messages: