Enterasys D2 D2G124-12P - Enabling;Disabling GVRP (GARP VLAN Registration Protocol); About GARP VLAN Registration Protocol (GVRP)

Enabling/Disabling GVRP (GARP VLAN Registration Protocol)
D-Series CLI Reference 7-19
Enabling/Disabling GVRP (GARP VLAN Registration Protocol)
About GARP VLAN Registration Protocol (GVRP)
Thefollowingsectionsdesc ribe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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extr actedVLANID(s).Theinformationisthen
transmittedouttheotherGVRPconfiguredportsofthedevice.Figure 7‐7showsanexampleof
howVLANbluefromendstation
Awouldbepropagatedacrossaswitchnetwork.
How It Works
InFigure 7‐7onpage 7‐20,Switch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Switch1andSwitch 2.Thesetwodevices
registerthisintheportegresslistsoftheports(Switch1,
port1andSwitch2,port1)thatreceived
theframeswiththeinformation.Switch2,whichisconnectedtoSwitch3andSwitch5declares
thesameinformationtothosetwodevicesandtheportegresslistofeachportisupdatedwiththe
newinformation,accordingly.
ConfiguringaVLAN
onan802.1Qswitch createsastaticVLANentry.Theentrywillalways
remainregisteredandwillnottimeout.However,dynamicentrieswilltime‐outandtheir
registrationswillberemovedfromthememberlistiftheendstationAisremoved.Thisensures
that,ifswitchesaredisconnected
orifendstationsareremoved,theregisteredinformation
remainsaccurate.
TheendresultisthattheportegresslistofaportisupdatedwithinformationaboutVLANsthat
resideonthatport,eveniftheactualstationontheVLANisseveralhopsaway.