rfc3212.Constraint-Based LSP Setup using LDP

NetworkWorkingGroupB.Jamoussi,Editor,NortelNetworksRequestforComments:3212L.Andersson,UtforsABCategory:StandardsTrackR.Callon,JuniperNetworksR.Dantu,NetrakeCorporationL.Wu,CiscoSystemsP.Doolan,OTBConsultingCorp.T.WorsterN.Feldman,IBMCorp.A.Fredette,ANFConsultingM.Girish,AtogaSystemsE.Gray,SandburstJ.Heinanen,SongNetworks,Inc.T.Kilty,NewbridgeNetworks,Inc.A.Malis,VivaceNetworksJanuary2002Constraint-BasedLSPSetupusingLDPStatusofthisMemoThisdocumentspecifiesanInternetstandardstrackprotocolfortheInternetcommunity,andrequestsdiscussionandsuggestionsforimprovements.PleaserefertothecurrenteditionoftheInternetOfficialProtocolStandards(STD1)forthestandardizationstateandstatusofthisprotocol.Distributionofthismemoisunlimited.CopyrightNoticeCopyright(C)TheInternetSociety(2002).AllRightsReserved.AbstractThisdocumentspecifiesmechanismsandTLVs(Type/Length/Value)forsupportofCR-LSPs(constraint-basedroutedLabelSwitchedPath)usingLDP(LabelDistributionProtocol).Thisspecificationproposesanend-to-endsetupmechanismofaCR-LSPinitiatedbytheingressLSR(LabelSwitchingRouter).WealsospecifymechanismstoprovidemeansforreservationofresourcesusingLDP.ThekeywordsMUST,MUSTNOT,REQUIRED,SHALL,SHALLNOT,SHOULD,SHOULDNOT,RECOMMENDED,MAY,andOPTIONALinthisdocumentaretobeinterpretedasdescribedinRFC2119[6].Jamoussi,etal.StandardsTrack[Page1]RFC3212Constraint-BasedLSPSetupusingLDPJanuary2002TableofContents1.Introduction....................................................32.Constraint-basedRoutingOverview...............................42.1StrictandLooseExplicitRoutes...............................52.2TrafficCharacteristics........................................52.3Preemption.....................................................52.4RoutePinning..................................................62.5ResourceClass.................................................63.SolutionOverview...............................................63.1RequiredMessagesandTLVs.....................................73.2LabelRequestMessage..........................................73.3LabelMappingMessage..........................................93.4NotificationMessage..........................................103.5Release,Withdraw,andAbortMessages........................114.ProtocolSpecification.........................................114.1ExplicitRouteTLV(ER-TLV)...................................114.2ExplicitRouteHopTLV(ER-HopTLV)...........................124.3TrafficParametersTLV........................................134.3.1Semantics...................................................154.3.1.1Frequency.................................................154.3.1.2PeakRate.................................................164.3.1.3CommittedRate............................................164.3.1.4ExcessBurstSize.........................................164.3.1.5PeakRateTokenBucket....................................164.3.1.6CommittedDataRateTokenBucket..........................174.3.1.7Weight....................................................184.3.2Procedures..................................................184.3.2.1LabelRequestMessage.....................................184.3.2.2LabelMappingMessage.....................................184.3.2.3NotificationMessage......................................194.4PreemptionTLV................................................194.5LSPIDTLV.....................................................204.6ResourceClass(Color)TLV....................................214.7ER-Hopsemantics..............................................224.7.1.ER-Hop1:TheIPv4prefix..................................224.7.2.ER-Hop2:TheIPv6address.................................234.7.3.ER-Hop3:Theautonomoussystemnumber....................244.7.4.ER-Hop4:LSPID............................................244.8.ProcessingoftheExplicitRouteTLV.........................264.8.1.Selectionofthenexthop..................................264.8.2.AddingER-HopstotheexplicitrouteTLV...................274.9RoutePinningTLV.............................................284.10CR-LSPFECElement...........................................285.IANAConsiderations............................................295.1TLVTypeNameSpace...........................................295.2FECTypeNameSpace...........................................305.3StatusCodeSpace.............................................30Jamoussi,etal.StandardsTrack[Page2]RFC3212Constraint-BasedLSPSetupusingLDPJanuary20026.SecurityConsiderations........................................317.Acknowledgments................................................318.IntellectualPropertyConsideration............................319.References.....................................................32AppendixA:CR-LSPEstablishmentExamples.........................33A.1StrictExplicitRouteExample.................................33A.2NodeGroupsandSpecificNodesExample........................34AppendixB.QoSServiceExamples..................................36B.1ServiceExamples...............