Chapter4ServiceConguration
Figure4-49PPCongurationInstance
lCongurationProcedure
zte(cfg)#setigmpsnoopingenable
zte(cfg)#setigmpsnoopingaddvlan1
zte(cfg)#setdhcpsnooping-optionenable
zte(cfg)#setdhcpsnoopingaddport1-3
lCongurationVerication
UseHost1tosendDHCPDiscoverpackets.Viewalarminformationontheswitch.
ThuJul117:53:182004Receivetoomanypacketsof'dhcp'fromport1
UseHost2toapplyforjoiningthemulticastgroup225.0.0.1.Viewthemulticastentity
onthedevice.
zte(cfg)#showigmpsnoopingvlan
Maximalgroupnumber:1024
Currentgroupnumber:1
NumVlanIdGroupLast_ReportPortMember
------------------------------------------------------------
11225.0.0.110.40.1.102-3
4.35LLDPConguration
LLDPOverview
TheLinkLayerDiscoveryProtocol(LLDP)isanewprotocoldenedinthe802.1ab.This
protocolallowsneighboringdevicestosendmessagestoeachothertoupdatephysical
topologyinformationandestablishManagementInformationBases(MIBs).TheLLDP
workowisdescribedbelow:
1.Thelocaldevicesendsitslinkandmanagementinformationtoaneighbordevice.
2.Thelocaldevicereceivesthenetworkmanagementinformationofaneighbordevice.
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