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1、CiscoIOSIS-ISforIPv6PatrickGrosseteteCiscoSystemsCiscoIOSIPv6ProductManagerpgrosset@cisco.comAgendaIS-ISstandardizationCiscoIOSIS-ISforIPv6CiscoIOSMulti-TopologyIS-ISIPv6RoutingProtocolsSame“longest-prefixmatch”routingasIPv4CIDRTwoDifferentClassesLink-State(i.e.,OSP
2、F,ISIS,etc.)Distance-Vector(i.e.,RIP,IGRP,etc.)AutonomousSystem/RoutingDomainInteriorGatewayProtocols(IGPs)i.e.,OSPFv3,ISISforIPv6,RIPng,EIGRPforIPv6ExteriorGatewayProtocols(EGPs)Multi-ProtocolExtensionsforBGP4IS-ISStandardsIETFIS-ISforIPInternetsWGhttp://www.ietf.o
3、rg/html.charters/isis-charter.htmlISO10589specifiesOSIIS-ISroutingprotocolforCLNStrafficTag/Length/Value(TLV)optionstoenhancetheprotocolALinkStateprotocolwitha2levelhierarchicalarchitecture.RFC1195addedIPsupport,alsoknownasIntegratedIS-IS(I/IS-IS)I/IS-ISrunsontopoft
4、heDataLinkLayerRequiresCLNPtobeconfiguredDraftRFCdefineshowtoaddIPv6addressfamilysupporttoIS-IShttp://www.ietf.org/internet-drafts/draft-ietf-isis-ipv6-05.txtDraftRFCintroducesMulti-TopologyconceptforIS-IShttp://www.ietf.org/internet-drafts/draft-ietf-isis-wg-multi-
5、topology-06.txtIS-ISforIPv62Tag/Length/ValuesaddedtointroduceIPv6routingIPv6ReachabilityTLV(0xEC)ExternalbitEquivalenttoIPInternal/ExternalReachabilityTLV’sIPv6InterfaceAddressTLV(0xE8)ForHelloPDUs,mustcontaintheLink-LocaladdressForLSP,mustonlycontainthenon-LinkLoca
6、laddressIPv6NLPID(0x8E)isadvertisedbyIPv6enabledroutersAgendaIS-ISstandardizationCiscoIOSIS-ISforIPv6CiscoIOSMulti-TopologyIS-ISCiscoIOSIS-ISforIPv6IS-ISforIPv6wasintroducedacrossCiscoIOSreleases12.2(8)TandaboveaswellasCisco12.3MonCisco2600toCisco7500series12.0(22)S
7、andaboveonCisco1200012.2(14)SandaboveonCisco7x00seriesandCat.6K[12.2SX]Imagesare–pand–jsasCLNSisrequiredforIS-ISAsingleSPFrunsperlevelforOSI,IPv4andIPv6Allroutersinanareamustrunthesamesetofprotocols[IPv4-only,IPv6-only,IPv4-IPv6]L2routersmaynotbeconfiguredsimilarlyb
8、utnoroutingholemustexistSingleSPFrulesIfIS-ISisusedforbothIPv4andIPv6inanarea,bothprotocolsmustsupportthesametopologywithinthisarea.Coulds
