V4ACITDM 4 0 Inter-VRF Multicast 4 0

JohnWeston,TechnicalMarketingEngineer,DCTG,October2018,ACI4.0Inter-VRFmulticast,Inter-VRFMulticast,AllowsmulticastreceiversinoneVRFtoreceivemulticasttrafficfromsourcesinanotherVRFMulticasttrafficinthesourceVRFisforwardedasnormaltoallleafswitchesinthefabricwherethesourceVRFisdeployedAtthereceivingswitchthemulticasttrafficcanbesenttoreceiversindifferentVRFsthanthesource.TheRPFlookupforthesource/RPisdoneinthesourceVRF(similartoNXOSExtranetfeature)ThetranslationbetweenVRFsoccursontheleafswitchwherethereceiversareconnectedandthusrequiresthesourceVRFtoalsobepresentontheseswitches.ThepacketarrivestotheleafonthesourceVRFandisreplicatedtoreceiversinthereceiverVRF.,Inter-VRFMulticastGuidelines,AllsourcesforamulticastgroupmustbeinthesameVRF.DifferentsourcesforthesamegroupscannotexistinmultipleVRFsForASM,thetheRPmustbeinthesameVRFasthesourcesTheextranetgroupranges(inter-VRFmulticastgroups)mustbedefinedinthereceiverVRFandspecifythesourceVRF.Thisisdonethroughroute-mapconfigurationinthereceiverVRF.Foroutsidereceivers,theremustbearouteforthemulticastsource.ThiswouldrequiresharedservicesorsharedL3OuttoleakthesourceroutetothereceiverVRFwiththeL3out,BL11,VRF1,VRF2,L3out,VRF1,VRF1,L3out,VRF2,L3out,VRF1,L3out,VRF2,Receiver,Source,VRF1,VRF2,20.1.1.10source,30.1.1.30,multicastreceiver,239.23.1.1,Inter-VRFMulticastFlow,MulticastsentacrossfabricinsourceVRF.(VRF1GIPo/VRF1VNID),SourceVRFmustbedeployedonallleafswitcheswheretherearereceivers,Receiver,multicastpacketsarriveattheegressleafinthesourceVRFandareforwardedtoreceiversinthereceiverVRF,BL11,VRF1,VRF2,L3out,VRF1,VRF1,L3out,VRF2,L3out,VRF1,L3out,VRF2,Receiver,Source,VRF1,VRF2,20.1.1.10sourceFabricRP:123.1.1.1,30.1.1.30,multicastreceiver,239.23.1.1RP:123.1.1.1,Inter-VRFMulticastFlowRPRequirements,Receiver,AnycastRPinsourceVRFRP123.1.1.1,AnycastRPinsourceVRFRP123.1.1.1,SourceVRFisconfiguredwithfabricasRP(new4.0feature),BL11,VRF1,VRF2,L3out,VRF1,L3out,VRF2,L3out,VRF1,L3out,VRF2,Receiver,Source,VRF1,VRF2,30.1.1.30,multicastreceiver,Inter-VRFMulticastsourceVRFnotdeployedonleafwithreceivers:NotSupported,Receiver,MulticasttrafficnotsenttoreceiverleafifsourceVRFisnotdeployedthere,BL11,VRF1,VRF2,L3out,VRF2,L3out,VRF1,L3out,VRF2,Source,VRF1,VRF2,20.1.1.10RP:123.1.1.1,30.1.1.30,multicastreceiver,Inter-VRFSourceVRFonlydeployedwhererequired:Supported,Receiver,VRF2,VRF2,VRF1,Receiver,SourceVRFdoesnotneedtobedeployedonallleafswitches.Onlywheretherearereceivers,nomulticastreceivers,nomulticastreceivers,ReceiverVRFdoesnotneedtobedeployedonsourceleaf,Configuration,AllInter-VRFmulticastconfigurationisdoneinthereceiverVRF.ThesourceVRFforwardsmulticastasnormalandthetranslationhappensontheegressswitchbasedonreceiverVRFconfigurationSourceVRFForASMitisrequiredthattheRPbeinthesourceVRFNewRPinthefabricfeatureisconfiguredinsourceVRFReceiverVRFInter-VRFMulticastfeatureisconfiguredinreceiverVRFonly(notrequiredinsourceVRF)SettingidentifiessourceTenant,sourceVRF,androute-mapcontainingoneormoregroupranges,NewConfigurationsettingsforInter-VRFmulticast,FabricRPconfiguration(sourceVRF),Optionalroute-mapcontaininglistofmulticastgroupsforthisRPRPwillbeconfiguredasloopbacksonallL3OutsinsourceVRFPIMenabledL3OutisrequiredinsourceVRF,Inter-VRFMulticastConfiguration(receiverVRF),Route-mapidentifiesmulticastgrouprangesfromsourcesinthesourceVRFGroupsmustnotoverlapwithgroupsinreceiverVRForothersourceVRFs,Route-mapsareusedtospecifygrouprangesforstaticRP,RPinthefabric,andinter-VRFmulticastfeaturesInter-VRFmulticastcanbeenabledforarangeofmulticastgrou