Intel 480T, User Manual

Page: 105 / 367

C H A P T E R 5 Virtual LANs (VLANs)
103
Generic VLAN Registration
Protocol
The Generic VLAN Registration Protocol (GVRP) allows a LAN
device to signal other neighboring devices that it wishes to receive
packets for one or more VLANs. The GVRP protocol is defined as
part of the IEEE 802.1Q Virtual LANs draft standard. The main
purpose of the protocol is to allow switches to automatically
discover some of the VLAN information that would otherwise have
to be manually configured in each switch. GVRP can also be run by
network servers. These servers are usually configured to join
several VLANs, and then signal the network switches of the
VLANs they want to join.
Figure 11 illustrates a network using GVRP.
Figure 11: Network example using GVRP
In Figure 11, Switch A is a member of VLAN Red . VLAN Red has
the VLANid 10. Port 1 and port 2 on Switch A are added to the
VLAN as untagged.
VLAN Red,
Untagged
Switch A VLAN Red, Tag 10
Switch B
GVRP: "Send
me traffic for
VLAN tag 10."
GVRP: "Send
me traffic for
VLAN tag 10."
GVRP: "Send
me traffic for
VLAN tag 10."
480t_025
VLAN Red,
Untagged