D-Link DWS-4026 [233/741] Viewing multicast forwarding database information

ViewingMulticastForwardingDatabaseInformation

D-Link UnifiedWiredandWirelessAccessSystem

November2011 Page233

D‐LinkUWSUserManual

ViewingMulticastForwardingDatabaseInformation

TheLayer2MulticastForwardingDatabase(MFDB)isusedbytheswitchtomakeforwardingdecisionsfor

packetsthatarrivewithamulticastdestinationMACaddress.Bylimitingmulticaststoonlycertainportsinthe

switch,trafficispreven tedfromgoingtopartsofthenetworkwherethattrafficisunnecessary.

Whenapa

cketenterstheswitch,thedestinationMACaddressiscombinedwiththeVLANIDandasearchis

performedintheLayer2MulticastForwardingDatabase.Ifnomatchisfound,thenthepacketisei therflooded

toallportsintheVLANordiscarded,dependingontheswitchc

onfiguration.Ifamatchisfound,thenthe

packetisforwardedonlytotheportsthataremembersofthatmulticastgroup.

MFDBTable

UsetheMFDBTablepagetoviewtheportmembershipinformationforallactivemulticastaddressentries.The

keyforanentryconsistsofaVLANIDandMACaddresspair.Entriesmaycontaindataformorethanone

protocol.

ToaccesstheMFDBTablepage,clickLAN>Monitoring>MulticastForwardingDatab

ase>MFDBTableinthe

navigationtree.

Figure144:MFDBTable

Table126:MFDBTableFields

Field Description

MACAddress EntertheVLANID/MACAddresspairwhoseMFDBtableentryyouwant

displayed.Entereighttwo‐digithexadecimalnumbersseparatedbycolons,for

example00:01:23:43:45:67:89:AB.Thefirsttwo2‐digithexadecimalnumbers

aretheVLANIDandtheremainingnumbersaretheMACaddress.Thenclick

ontheSearchbut

ton.Iftheaddressexists,thatentrywillbedisplayed.An

exactmatchisrequired.

MACAddress ThemulticastMACaddressforwhichyourequesteddata.

Component ThisisthecomponentthatisresponsibleforthisentryintheMulticast

ForwardingDataba se.PossiblevaluesareMLDSnooping,GMRP,IGMP

Snooping,andStaticFiltering.

Type Thisdispla

ysthetypeoftheentry.Staticentriesarethosethatareconfigured

bytheenduser.Dynamicentriesareaddedtothetableasaresultofalearning

processorprotocol.

Description Thetextdescriptionofthismulticasttableentry.Possiblevaluesare

ManagementConfigured,NetworkConfiguredandNetworkAssis

ted.