Port-Based Virtual LANs (VLANs) and GVRP

GVRP

N o t e

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

Learn

page 11-42

page 11-45

page 11-47

will handle advertisements for

 

 

 

 

new VLANs

 

 

 

 

convert a dynamic VLAN to a

n/a

page 11-47

static VLAN

 

 

 

 

configure static VLANs

DEFAULT_VLAN

page 11-10

page 11-15

page 11-47

 

(VID = 1)

 

 

 

 

 

 

 

 

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.

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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