Zte ZXR10 5250 Series - Qinq Configuration; Figure 5-24 Typical Qinq Network

Chapter5ServiceConguration
CommandFunction
showaaamac-authentication(allcongurationmodes)DisplaysMACauthentication
congurationinformation.
showaaamac-authenticationclient(allcongurationmodes)DisplaysinformationofallMAC
authenticationclients.
5.20QinQConguration
QinQOverview
AQinQistheIEEE802.1qtunnelingprotocolandisalsocalledVLANstacking.TheQinQ
technologyistheadditionofonemoreVLANtag(outertag)totheoriginalVLANtag(inner
tag).Theoutertagcanshieldtheinnertag.
AQinQdoesnotneedanyprotocolsupport.ThesimpleLayer2VirtualPrivateNetwork
(L2VPN)canberealizedthroughQinQ.TheQinQisespeciallysuitableforthesmall-sized
LANthattakesthelayer-3switchasitsbackbone.
ForthetypicalnetworkoftheQinQtechnology,seeFigure5-24.Theportconnectedto
theusernetworkiscalledCustomerport.TheportconnectedtotheISPnetworkiscalled
Uplinkport.TheedgeaccessequipmentoftheISPnetworkiscalledProviderEdge(PE).
Figure5-24TypicalQinQNetwork
TheusernetworkisconnectedtothePEthroughtheTrunkVLANmode.Theinternal
UplinkportsoftheISPnetworkaresymmetricallyconnectedthroughtheTrunkVLAN
mode.
1.Whenapacketissentformusernetwork1tothecustomerportofswitchA,because
thePORTBASEVLAN-basedcustomerportdoesnotidentifythetagwhenreceiving
thepacket,thecustomerportprocessesthepacketasanuntaggedpacketnomatter
whetherthisdatapacketisattachedwiththeVLANtagornot.Thepacketisforwarded
bytheVLAN10,whichisdeterminedbythePVID.
2.TheuplinkportofswitchAinsertstheoutertag(VLANID:10)whenforwardingthe
datapacketreceivedfromthecustomerport.Thetpidofthistagcanbecongured
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SJ-20131111172707-002|2013-11-27(R1.0)ZTEProprietaryandCondential