3Com Switch 8800 Advanced Software V5 Configuration Guide

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GVRP CONFIGURATION
GARP VLAN registration protocol (GVRP) is a GARP application. Based on the
operating mechanism of GARP, GVRP maintains and propagates dynamic VLAN
registration information for the GVRP devices on a network.
When configuring GVRP, go to these sections for information you are interested
in:
■ “Introduction to GVRP” on page 139
■ “Configuring GVRP” on page 142
■ “Displaying and Maintaining GVRP” on page 143
■ “GVRP Configuration Example” on page 144
Introduction to GVRP This section covers these topics:
■ “GARP” on page 139
■ “Configuring GVRP” on page 142
■ “Protocols and Standards” on page 142
GARP The generic attribute registration protocol (GARP) provides a mechanism that
allows GARP participants in a LAN to distribute, propagate, and register with other
participants some attributes such as VLAN IDs or multicast addresses.
GARP itself does not exist on a device as an entity. GARP-compliant application
entities are called GARP applications. One example is GVRP. When a GARP
application entity is present on a port on your device, this port is regarded a GARP
application entity.
This section covers these topics:
■ “GARP messages and timers” on page 139
■ “Operating mechanism of GARP” on page 140
■ “GARP message format” on page 141
GARP messages and timers
1 GARP messages
A GARP participant exchanges information with other GARP participants mainly by
sending the following three types of messages: Join, Leave, and LeaveAll.
■ Join to register some attribute with other participants.