ZyXEL Communications GS1350 Series User Manual page 353

G ARP
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.
G ARP T im e rs
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 Declarations are withdrawn by issuing a Leave message.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.
G VRP
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 176 IEEE 802.1Q VLAN Terminology
VL AN PARAMET ER
VLAN Type
VLAN Administrative
Control
VLAN Tag Control
VLAN Port
49.7.2.2 Po rt VL AN T runking
Enable
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that port. This is useful if you want to set up VLAN groups on end devices without having to configure the
same VLAN groups on intermediary devices.
Refer to the following figure. Suppose you want to create VLAN groups 1 and 2 (V1 and V2) on devices
A and B. Without
D and E; otherwise they will drop frames with unknown VLAN group tags. However, with
enabled on ports in each intermediary switch you only need to create VLAN groups in the end devices
Chapter 49 Switching
T ERM
Permanent VLAN
Dynamic VLAN
Registration Fixed
Registration
Forbidden
Normal Registration
Tagged
Untagged
Port VID
Acceptable Frame
Type
Ingress filtering
on a port to allow frames belonging to unknown VLAN groups to pass through
, you must configure VLAN groups 1 and 2 on all intermediary switches C,
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GS1350 Series User's Guide
DESC RIPT IO N
This is a static VLAN created manually.
This is a VLAN configured by a GVRP registration or de-registration
process.
Fixed registration ports are permanent VLAN members.
Ports with registration forbidden are forbidden to join the specified
VLAN.
Ports dynamically join a VLAN using GVRP.
Ports belonging to the specified VLAN tag all outgoing frames
transmitted.
Ports belonging to the specified VLAN do not tag all outgoing
frames transmitted.
This is the VLAN ID assigned to untagged frames that this port
received.
You may choose to accept both tagged and untagged incoming
frames, just tagged incoming frames or just untagged incoming
frames on a port.
If set, the Switch discards incoming frames for VLANs that do not
have this port as a member.
353
VL AN T runking