User manual

Table Of Contents
Chapter8
IGMPSnooping
Configuration
TableofContents
IGMPSnoopingOverview....................................................67
ConguringIGMPSnooping.................................................69
IGMPSnoopingCongurationExample.................................72
IGMPSnoopingMaintenanceandDiagnosis...........................72
IGMPSnoopingOverview
IGMPsnoopingisoneoflayer2functionsoftheswitch,whichcan
limittheforwardingofIPmulticasttrafc.
AsshowninFigure19,IGMPrunsbetweenhostandmulticast
router .IGMPcommunicationsbetweenhostandroutersothat
theswitchcanlearnwhichportsaremulticastmembersandget
multicastforwardtablebeforeforwardingmulticastpackets.Mul-
ticastpacketissenttotheportinthemulticastforwardtableonly.
IGMPsnoopingavoidunnecessarynetworkbandwidthwasteand
improvetheswitchutilization.
CondentialandProprietaryInformationofZTECORPORATION67