Automatic Vlan Registration; Garp; Gvrp; Table 13 Ieee 802.1Q Vlan Terminology - ZyXEL Communications GS-2724 User Manual

Chapter 8 VLAN

8.2 Automatic VLAN Registration

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

8.2.1 GARP

GARP (Generic Attribute Registration Protocol) allows network switches 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.
8.2.1.1 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 Declarations are withdrawn by issuing a Leave message.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.

8.2.2 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 IEEE 802.1Q VLAN terminology.

Table 13 IEEE 802.1Q VLAN Terminology

VLAN PARAMETER TERM
VLAN Type
VLAN Administrative
Control
VLAN Tag Control
VLAN Port
86
DESCRIPTION
Permanent VLAN This is a static VLAN created manually.
Dynamic VLAN This is a VLAN configured by a GVRP registration/
deregistration process.
Registration Fixed Fixed registration ports are permanent VLAN members.
Registration Ports with registration forbidden are forbidden to join the
Forbidden specified VLAN.
Normal Registration Ports dynamically join a VLAN using GVRP.
Tagged Ports belonging to the specified VLAN tag all outgoing
frames transmitted.
Untagged Ports belonging to the specified VLAN don't tag all
outgoing frames transmitted.
Port VID This is the VLAN ID assigned to untagged frames that
this port received.
Acceptable Frame You may choose to accept both tagged and untagged
Type incoming frames, just tagged incoming frames or just
untagged incoming frames on a port.
Ingress filtering If set, the Switch discards incoming frames for VLANs
that do not have this port as a member
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