Automatic Vlan Registration; Garp; Gvrp - ZyXEL Communications XGS3700-48 User Manual

7.2 Automatic VLAN Registration

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

7.2.1 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.
7.2.1.1 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 Declarations are withdrawn by issuing a Leave message.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.

7.2.2 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 VLAN
groups beyond the local Switch.
Please refer to the following table for common IEEE 802.1Q VLAN terminology.
Table 40 IEEE 802.1Q VLAN Terminology
VLAN PARAMETER
VLAN Type
VLAN Administrative
Control
VLAN Tag Control
VLAN Port
Chapter 7 VLAN
TERM 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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