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Enabling/Disabling GVRP set vlan dynamicegress

7-22 802.1Q VLAN Configuration

Enabling/Disabling GVRP

Purpose

TodynamicallycreateVLANsacrossaswitchednetwork.TheGVRP(GARPVLANRegistration

Protocol)commandsetisusedtodisplayGVRPconfigurationinformation,thecurrentglobal

GVRPstatesetting,individualportsettings(enableordisable)andtimersettings.Bydefault,

GVRPisenabledonallports,andgloballyonthedevice.



GARP VLAN Registration Protocol (GVRP) Operation

Thefollowingsectionsdescribethedeviceoperationwhenitsportsareoperatingunderthe

GenericAttributeRegistrationProtocol(GARP)application–GARPVLAN RegistrationProtocol

(GVRP).

Overview

ThepurposeofGVRPistodynamicallycreateVLANsacrossaswitchednetwork.WhenaVLAN

isdeclared,theinformationistransmittedoutGVRPconfiguredportsonthedeviceinaGARP

formattedframeusingtheGVRPmulticastMACaddress.Aswitch/routerthatreceivesthisframe,

examinestheframe,andextracts

theVLANIDs.GVRPthencreatestheVLANsandaddsthe

receivingporttoitstaggedmemberlistfortheextractedVLANID(s).Theinformationisthen

transmittedouttheotherGVRPconfiguredportsofthedevice.Figure 7‐1showsanexampleof

howVLANbluefromendstation

Awouldbepropagatedacrossaswitch/routernetwork.

How It Works

InFigure 7‐1,Device4,port1isregisteredasbeingamemberofVLANBlueandthendeclares

thisfactoutallitsports(2and3)toDevice1andDevice 2.Thesetwodevicesregisterthisinthe

portegresslistsoftheports(Device1,port1

andDevice2,port1)thatreceivedtheframeswith

theinformation.Device2,whichisconnectedtoDevice3andDevice5declaresthesame

informationtothosetwodevicesandtheportegresslistofeachportisupdatedwiththenew

information,accordingly.

Enterasys Matrix DFE-Gold Series User Manual

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