Alcatel OS-LS-6224 User Manual page 228

3
Configuring the Switch
Automatic VLAN Registration
GVRP (GARP VLAN Registration Protocol) defines a system whereby the switch
can automatically learn the VLANs to which each end station should be assigned. If
an end station (or its network adapter) supports the IEEE VLAN protocol, it can be
configured to broadcast a message to your network indicating the VLAN groups it
wants to join. When this switch receives these messages, it will automatically place
the receiving port in the specified VLANs, and then forward the message to all other
ports. When the message arrives at another switch that supports GVRP, it will also
place the receiving port in the specified VLANs, and pass the message on to all
other ports. VLAN requirements are propagated in this way throughout the network.
This allows GVRP-compliant devices to be automatically configured for VLAN
groups based solely on endstation requests.
To implement GVRP in a network, first add the host devices to the required VLANs
(using the operating system or other application software), so that these VLANs can
be propagated onto the network. For both the edge switches attached directly to
these hosts, and core switches in the network, enable GVRP on the links between
these devices. You should also determine security boundaries in the network and
disable GVRP on the boundary ports to prevent advertisements from being
propagated, or forbid those ports from joining restricted VLANs.
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