IPv6 Multicast服务网介绍.

1IPv6Multicast服務網介紹中華電信數據分公司林永泰93/11/242OutlineDifferencebetweenIPv4MulticastandIPv6MulticastMulticastinHiNetIPv6BackboneSummaryDemoDifferencebetweenIPv4MulticastandIPv6Multicast4AddressFormatisnotthesame!IPv4MulticastAddressing(ClassDaddress)IPv6MulticastAddressing11111111(FF)LifetimeScope8bits4bits4bits0InterfaceID0ifpermanent1iftemporary1=node2=link5=site8=organizationE=global11100000000~FFFFFFF0314IPv4MulticastAddressAddressScopeis224.0.0.0–239.255.255.2555EthernetAddressisnotthesame,too!IPv4EthernetMULTICASTaddressmappingIPv6EthernetMULTICASTaddressmappingFF021532bitsFFIPv6multicastaddress00000000000000000001FF156A2B2B6A333348bitsCorrespondingEthernetaddressMulticastprefixforEthernetmulticast11105bits0x00-00-00~7F-FF-FF08314IPv4MulticastAddress000000010000000001011110(0x01-00-5E)0x00-00-00~7F-FF-FF0244823048-bitsEthernetaddress23bits5bits(2^5multicastaddresswithsameEthernetaddress)0=Internetmulticast1=Reservedforotheruse6IGMPissubstitutedbyMLDIGMP(InternetGroupManagementprotocol)vsMLD(MulticastListenerDiscovery)NameIGMPv1IGMPv2IGMPv3MLDv1MLDv2relationshipThefirstversionofIGMPDerivedfromIGMPv1DerivedfromIGMPv2DerivedfromIGMPv2DerivedfromMLDv2Individualprotocol?YESYESYESPartialfunctionofICMPv6PartialfunctionofICMPv6SupportSSM?NONOYESNOYESHowtoleavemulticastgroup?Waittime-outsendleavemessagesendleavemessagesendleavemessagesendleavemessage7IPv6notsupportMSDP!Becauseofscaleissue,IPv6doesn’tsupportMSDP!RPcannotexchangesourceinformation、Inter-domainMulticastroutingandhasload-sharingbyanycast.Now,(vender-support)onlySSM(source-specificMulticast)andEmbeddedRPsupportInter-domainIPv6Multicast.8Example:IPv6MulticastGroupAddressMulticastinHiNetIPv6Backbone10HiNetIPv6NetworkArchitecture11HiNetIPv6MulticastNetworkStatusConnection:ASCC、TWAREN----NativeIPv6modeTANET----TunnelmodeRPFChecking:HiNet與ASCC、TWAREN、TANET三網路間啟動MulticastBGP(MBGP)，將MediaServer及MCASTRP的IPv6Prefix經由MBGP散播RPAssignment&Backup:目前HiNet與ASCC、TWAREN、TANET三網路間採行shared-RP方式,指定HiNet的RPRouter進行Multicast影音傳輸(staticRP),RP透過Anycast機制進行備援BrowsingPrograms:使用者進入HiNet影音網首頁()上之IPv6影音(2)網頁點選Multicasthyperlink之後，即加入相對應的IPv6影音Multicastgroup12IPv6影音多媒體服務網入口()入口HiNetIPv6MulticastContentSource13HiNetIPv6MulticastContentSourceIPv6影音多媒體服務網MulticastPrograms14Summary•在IPv6Multicast協定中,IGMP已經由MLD所取代•IPv6Multicast協定中,並不支援MSDP,為了解決Inter-domainMulticastrouting問題,必須採用EmbeddedRP或SSM技術•FF:FF是IPv6Multicast位址mapping到EthernetMAC位址時的prefix•HiNet目前已完成與ASCC、TWAREN、TANet三大IPv6學術研究網路間之Multicast互連測試，。•HiNetIPv6影音訊息海報已分送至TANet區網中心進行推廣,若TANet各區網中心欲連上HiNet的IPv6Multicast網路，可經由TANET或與HiNet直接建立Tunnel互連。15現場連線展示…