GARP VLAN Registration Protocol (GVRP)
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Automatic configuration of VLANs
The GARP VLAN Registration Protocol (GVRP) is a protocol that simplifies VLAN
assignment on network-role ports and ensures consistency among switches in a
network.
GVRP is supported only in the IEEE 802.1Q / IEEE 802.1ad VLAN tagging modes.
In the transparent tagging modes (VPN tagging modes), a similar protocol, the
proprietary spanning tree with VPN registration protocol (STVRP) is supported.
STVRP is enabled per default and cannot be disabled.
By using GVRP, VLAN identifiers (VLAN IDs) only need to be provisioned on
customer-role ports of access nodes. VLAN IDs on network-role ports of intermediate
and access nodes are automatically configured by means of GVRP. The provisioned
VLAN IDs on customer-role ports are called static VLAN entries; the VLANs assigned
by GVRP are called dynamic VLAN entries. In addition, GVRP prevents unnecessary
broadcasting of Ethernet frames by forwarding VLAN frames only to those parts of the
network that have customer-role ports with that VLAN ID. Thus, the traffic of a
VLAN is limited to the STP branches that are actually connecting the VLAN members.
Legend:
1 Static VLAN IDs need to be entered manually at customer-role ports.
2 Dynamic VLAN IDs of intermediate and access nodes are
automatically configured.
3 No automatic configuration of VLAN IDs on ports towards those
access nodes where the respective VLAN ID is not provisioned, i.e. no
unnecessary broadcasting of Ethernet frames by forwarding VLAN
frames only to those parts of the network that have customer-role ports
with that VLAN ID.
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LAN
LAN
Traffic provisioning
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365-312-807R7.2
Issue 4, May 2007
Alcatel-Lucent - Proprietary
See notice on first page
8-49
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