14-30
Port-Based Virtual LANs (VLANs) and GVRP
GVRP
Port-Based Virtual LANs
(VLANs) and GVRP
GVRPGVRP—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 14-4.)
GVRP uses “GVRP Bridge Protocol Data Units” (“GVRP BPDUs”) to “adver-
tise” stat ic VL ANs . In this man ual , a GV RP B PDU is te rme d an advertisement.
GVRP enables the Switch 4108GL 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 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 14-37 page 14-39 page 14-42
list static and dynamic VLANs
on a GVRP-enabled switch
n/a —page 14-41 page 14-42
enable or disable GVRP on the
switch
disabled page 14-37 page 14-40 page 14-42
enable or disable GVRP on
individual ports
enabled page 14-37 page 14-40 —
control how individual ports
will handle advertisements for
new VLANs
Learn page 14-37 page 14-40 page 14-42
convert a dynamic VLAN to a
static VLAN
n/a —page 14-42 —
configure static VLANs DEFAULT_VLAN
(VID = 1)
page 14-11 page 14-16 page 14-42