3-3
GVRP
Introduction
Introduction
GVRP—GARP VLAN Registration Protocol—is an application of the Generic
Attribute Registration Protocol—GARP. GVRP is defined in the IEEE 802.1Q
standard, and GARP is defined in the IEEE 802.1D-1998 standard.
Note To understand and use GVRP you must have a working knowledge of 802.1Q
VLAN tagging. (See “Port-Based Virtual LANs (Static VLANs)” on page 2-3.)
GVRP uses “GVRP Bridge Protocol Data Units” (“GVRP BPDUs”) to “adver-
tise” static VLANs. In this manual, a GVRP BPDU is termed an advertisement.
Advertisements are sent outbound from ports on a switch to the devices
directly connected to those ports.
GVRP enables the switch to dynamically create 802.1Q-compliant VLANs on
links with other devices running GVRP. This enables the switch to automati-
cally create VLAN links between GVRP-aware devices. (A GVRP link can
include intermediate devices that are not GVRP-aware.) This operation
reduces the chances for errors in VLAN configuration by automatically pro-
viding VLAN ID (VID) consistency across the network. That is, you can use
GVRP to propagate VLANs to other GVRP-aware devices instead of manually
having to set up VLANs across your network. After the switch creates a
dynamic VLAN, you can optionally use the CLI static <vlan-id> command to
convert it to a static VLAN or allow it to continue as a dynamic VLAN for as
long as needed. You can also use GVRP to dynamically enable port member-
ship in static VLANs configured on a switch.
Feature Default Menu CLI Web
view GVRP configuration n/a page 3-12 page 3-13 page 3-16
list static and dynamic VLANs
on a GVRP-enabled switch
n/a — page 3-15 page 3-16
enable or disable GVRP disabled page 3-12 page 3-14 page 3-16
enable or disable GVRP on
individual ports
enabled page 3-12 page 3-14 —
control how individual ports
will handle advertisements for
new VLANs
Learn page 3-12 page 3-14 page 3-16
convert a dynamic VLAN to a
static VLAN
n/a — page 3-16 —
configure static VLANs DEFAULT_VLAN
(VID = 1)
page 2-14 page 2-19 page 2-25
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