ZyXEL Communications IES-1000 15.5Automatic VLAN Registration, 15.6GARP, 15.6.1GARP Timers, 15.6.2GVRP, Table 15-1GARP Terminology

IES-1000 User’s Guide

added and deleted using GARP VLAN Registration Protocol (GVRP), where GARP is the Generic Attribute Registration Protocol.

15.5Automatic VLAN Registration

GARP and GVRP are the protocols used to automatically register VLAN membership across switches.

15.6GARP

GARP (Generic Attribute Registration Protocol) allows network devices to register and de-register attribute values with other GARP participants within a bridged LAN. GARP is a protocol that provides a generic mechanism for protocols that serve a more specific application, for example, GVRP.

15.6.1GARP Timers

Switches join VLANs by making a declaration. A declaration is made by issuing a Join message using GARP. Declarations are withdrawn by issuing a Leave message. A Leave All message terminates all registrations. GARP timers set declaration timeout values.

15.6.2GVRP

GVRP (GARP VLAN Registration Protocol) is a registration protocol that defines a way for switches to register necessary VLAN members on ports across the network. Enable this function to permit VLANs groups beyond the local switch.

Please refer to the following table for common GARP terminology.

Table 15-1 GARP Terminology

VLAN Type	Permanent VLAN	This is a static VLAN created manually.
	Dynamic VLAN	This is a VLAN configured by a GVRP registration/deregistration
		process.
VLAN	Registration Fixed	Fixed registration ports are permanent VLAN members.
Administrative
	Registration	Ports with registration forbidden are not allowed to register (join) this
Control
	Forbidden	VLAN.
	Normal	Ports join a VLAN using GVRP.
	Registration
VLAN Tag	Tagged	Ports tag all (VLAN member) egress frames transmitted.
Control
	Untagged	Ports do not tag all (VLAN member) egress frames transmitted.

VLAN 15-3