Zte ZXR10 2928E User Manual

Chapter4ServiceConguration
4.21QinQConguration
QinQOverview
QinQistheIEEE802.1QtunnelingprotocolandisalsocalledVLANstacking.QinQ
technologyistheadditionofonemoreVLANtag(outertag)totheoriginalVLANtag(inner
tag).Theoutertagcanshieldtheinnertag.
QinQdoesnotneedtheprotocolsupport.ThesimpleLayer2VirtualPrivateNetwork
(L2VPN)canberealizedthroughQinQ.TheQinQisespeciallysuitableforthesmall-size
LANthattakesthelayer-3switchasitsbackbone.
Figure4-24showsthetypicalnetworkingoftheQinQtechnology.Theportconnectedto
theusernetworkiscalledCustomerport.TheportconnectedtotheISPnetworkiscalled
Uplinkport.TheedgeaccessequipmentoftheISPnetworkiscalledProviderEdge(PE).
Figure4-24TYPICALQINQNETWORKING
TheusernetworkisgenerallyconnectedtothePEthroughtheTrunkVLANmode.The
internalUplinkportsoftheISPnetworkaresymmetricallyconnectedthroughtheTrunk
VLANmode.
1.Whenapacketissentformusernetwork1tothecustomerportofswitchA,because
thePORTBASEVLAN-basedcustomerportdoesnotidentifythetagwhenreceiving
thepacket,thecustomerportprocessesthepacketasanuntaggedpacketnomatter
whetherthisdatapacketisattachedwiththeVLANtagornot.Thepacketisforwarded
bytheVLAN10,whichisdeterminedbythePVID.
2.TheuplinkportofswitchAinsertstheoutertag(VLANID:10)whenforwardingthe
datapacketreceivedfromthecustomerport.Thetpidofthistagcanbecongured
ontheswitch.InsidetheISPnetwork,thepacketisbroadcastalongtheportofVLAN
10untilitreachestheswitchB.
3.SwitchBndsoutthattheportconnectedtousernetwork2isacustomerport.Thus,it
removestheoutertagincompliancewiththeconventional802.1Qprotocoltorecover
theoriginalpacketandsendsthepackettousernetwork2.
4.Inthisway,databetweenusernetwork1andusernetwork2canbetransmitted
transparently.TheVLANIDoftheusernetworkcanbeplannedregardlessofthe
conictwiththeVLANIDintheISPnetwork.
ConguringQinQ
TheQinQcongurationincludesthefollowingcommands:
4-75
SJ-20120409144109-002|2012-07-02(R1.0)ZTEProprietaryandCondential

Zte ZXR10 2928E Specifications

General

MAC Address Table Size	8K
Jumbo Frame	9K
Storage Temperature	-40°C to 70°C
VLAN	4K
Power Supply	AC: 100~240V, 50/60Hz
Dimensions	440mm x 44mm x 220mm
Operating Temperature	0°C to 45°C
Operating Humidity	10% to 90% non-condensing
Storage Humidity	5% to 95% non-condensing
Power Consumption	< 30W