Chapter 1 Gvrp Configuration; Introduction To Gvrp; Gvrp Mechanism - Huawei Quidway S3100 Series Operation Manual

Operation Manual – GVRP
Quidway S3100 Series Ethernet Switches

Chapter 1 GVRP Configuration

1.1 Introduction to GVRP

GVRP (GARP VLAN registration protocol) is an application of GARP (generic attribute
registration protocol). GVRP is based on the mechanism of GARP; it maintains
dynamic VLAN registration information and propagates the information to other
switches.
Note:
GARP is a generic attribute registration protocol. This protocol provides a mechanism
to register, distribute and propagate the information about VLANs, multicast addresses,
and so on, between the switching members in a switching network.
After the GVRP feature is enabled on a switch, the switch can receive the VLAN
registration information from other switches to dynamically update the local VLAN
registration information (including current VLAN members, which ports these VLAN
members get to, and so on), and propagate the local VLAN registration information to
other switches so that all the switching devices in the same switching network can have
the same VLAN information. The VLAN registration information includes not only the
static registration information configured locally, but also the dynamic registration
information from other switches.

1.1.1 GVRP Mechanism

I. GARP Timers
The information exchange between GARP members is completed by messages. The
messages performing important functions for GARP fall into three types: Join, Leave
and LeaveAll.
When a GARP entity expects other switches to register certain attribute
information of its own, it sends out a Join message.
When a GARP entity expects other switches to unregister certain attribute
information of its own, it sends out a Leave message.
Once a GARP entity starts up, it starts the LeaveAll timer. After the timer times out,
the GARP entity sends out a LeaveAll message.
The join message and the Leave message are used together to complete the
unregistration and re-registration of information. Through message exchange, all the
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Chapter 1 GVRP Configuration