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Port-Based Virtual LANs (VLANs) and GVRP
GVRP
GVRP
Feature Default Menu CLI Web
view GVRP configuration n/a page 11-42 page 11-44 page 11-47
list static and dynamic VLANs n/a — page 11-46 page 11-47
on a GVRP-enabled switch
enable or disable GVRP disabled page 11-42 page 11-45 page 11-47
enable or disable GVRP on enabled page 11-42 page 11-45 —
individual ports
control how individual ports
will handle advertisements for
new VLANs
Learn page 11-42 page 11-45 page 11-47
convert a dynamic VLAN to a
static VLAN
n/a — page 11-47 —
configure static VLANs DEFAULT_VLAN
(VID = 1)
page 11-10 page 11-15 page 11-47
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.
Not e 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 11-3.)
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 Series 5300XL switches to dynamically create 802.1Q-
compliant VLANs on links with other devices running GVRP. This enables the
switch to automatically 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 automat-
ically providing 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 membership in static VLANs configured on a switch.
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