Garp/Gvrp - WAGO 852-1305 Manual

70 Enhanced Features
7.2.3.2

GARP/GVRP

GARP ("Generic Attribute Registration Protocol") and GVRP ("GARP VLAN
Registration Protocol" or "Generic VLAN Registration Protocol") are industry-
standard protocols described in IEEE 802.1p. GVRP is a GARP application that
provides 802.1Q-compliant "VLAN Pruning" and dynamic VLAN creation on
"802.1Q Trunk Ports".
With GVRP, the switch can exchange VLAN configuration information with
other GVRP switches, prune unnecessary broadcast and unknown unicast traffic,
and dynamically create and manage VLANs on switches that are connected
through "802.1Q Trunk Ports".
GVRP makes use of GID ("Group Identification") and GIP, which provide the
common "State Machine Descriptions" and the common information propagation
mechanisms defined for use in GARP-based applications. GVRP runs only on
"802.1Q Trunk Links". GVRP prunes "Trunk Links" so that only active VLANs
are transmitted across trunk connections. GVRP expects to hear join messages
from the switches before it will add a VLAN to the trunk. GVRP updates and hold
timers can be altered. GVRP ports run in various modes to control how they will
prune VLANs. GVRP can be configured to dynamically add and manage VLANS
in the VLAN database for "Trunking" purposes.
In other words, GVRP allows the propagation of VLAN information from device
to device. With GVRP, a single switch is manually configured for all VLANs
required for the network and all other switches on the network learn detect the
VLANs dynamically. End nodes can be plugged into any switch and connected to
the required VLAN. For end nodes to make use of GVRP, they need GVRP-aware
network interface cards (NICs). The GVRP-aware NIC is configured with the
desired VLAN or VLANs, then connected to a GVRP-enabled switch. The NIC
communicates with the switch once connectivity is established between the NIC
and switch.
Registration Mode:
• Normal
The "normal" registration mode allows dynamic creation (if dynamic
VLAN creation is enabled), registration and deregistration of VLANs on the
trunk port. "Normal" mode is the default setting.
• Forbidden
The "forbidden" registration mode deregisters all VLANs (except VLAN 1)
and prevents further creation or registration of VLANs on the trunk port.
• Fixed
The "fixed" registration mode allows manual creation and registration of
VLANs, prevents VLAN deregistration and registers all known VLANs on
other ports on the trunk port. (Same applies to the static VLAN)
WAGO-ETHERNET-Zubehör 852
852-1305 8/4-Port 100BASE-T/1000BASE-SX/LX
Manual
1.1.0