IES-1000 User’s Guide
VLAN 15-3
added and deleted using GARP VLAN Registration Protocol (GVRP), where GARP is the Generic Attribute
Registration Protocol.
15.5 Automatic VLAN Registration
GARP and GVRP are the protocols used to automatically register VLAN membership across switches.
15.6 GARP
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.
15.6.1 GARP 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Declarations are withdrawn by issuing a Leave message.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.
15.6.2 GVRP
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
Permanent VLAN This is a static VLAN created manually. VLAN Type
Dynamic VLAN This is a VLAN configured by a GVRP registration/deregistration
process.
Registration Fixed Fixed registration ports are permanent VLAN members.
Registration
Forbidden
Ports with registration forbidden are not allowed to register (join) this
VLAN.
VLAN
Administrative
Control
Normal
Registration
Ports join a VLAN using GVRP.
Tagged Ports tag all (VLAN member) egress frames transmitted. VLAN Tag
Control
Untagged Ports do not tag all (VLAN member) egress frames transmitted.
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