第12章 多播路由协议

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1、Chapter12MulticastingandMulticastRoutingProtocolsIntroductionMulticastaddressesandIGMPMulticastroutingMulticastroutingprotocolMBONEyn@uestc.edu.cn112.1IntroductionIPUnicasting，IP单播通信OnesourceOnedestinationintheInternetunicastunicastaddressaddressIPMulticasting，IP多播通信Onesou

2、rceAgroupofdestinationsintheInternetunicastmulticastaddressaddressIPBroadcasting，IP广播通信OnesourceAllofdestinationsinoneIPnetworkunicastbroadcastaddressaddressyn@uestc.edu.cn2DataLinkLayerPhysicalmulticastsupportMostLANssupportphysicalmulticastaddressingMappingIPmulticasta

3、ddressestophysicalmulticastaddressesNophysicalmulticastsupportMostWANsDONOTsupportphysicalmulticastaddressingUsingtunneling（隧道技术）toencapsulatethemulticastIPpacketinaunicastIPpacketOrbeencapsulatedaslinklayerbroadcastyn@uestc.edu.cn3Multicastingvs.MultipleUnicastingLessbandwi

4、dthLessloadofsourceLessdelayMoreefficientyn@uestc.edu.cn4MulticastApplicationsAccesstodistributeddatabase访问分布式数据库Informationdissemination信息传播DisseminationofNews传播新闻Teleconferencing电视会议Distancelearning远程学习yn@uestc.edu.cn512.2MulticastAddressandIGMPMulticastaddressFunction:def

5、ineahostgroupIPmulticastaddressesMACmulticastaddressesMappingclassDtoEthernetMACaddressIGMPInternetGroupManagementProtocol网际组管理协议yn@uestc.edu.cn612.2.1IPMulticastAddressAllocation:IANA（RFC3171）ClassD:224.0.0.0～239.255.255.255LocalNetworkControlBlock224.0.0.0/24:224.0.0.0～224

6、.0.0.255NotbeforwardedbyrouterInternetworkControlBlock224.0.1.0/24:224.0.1.0～224.0.1.255MustbeforwardedthroughtheInternetAdministrativelyScopedAddressBlock239.0.0.0/8:239.0.0.0～239.255.255.255类似于私有IP单播地址（如10.0.0.0/8）yn@uestc.edu.cn712.2.2MACMulticastAddressIEEEMACaddressform

7、atStandardGroupMACAddressesAllocation:IEEERegistrationAuthorityIEEE802.1DMACBridgeFilteredMACGroupAddresses01-80-C2-00-00-00～01-80-C2-00-00-0FStandardMACGroupAddresses01-80-C2-00-00-10～01-80-C2-FF-FF-FFOthers－http://standards.ieee.org/regauthIP-mappedEthernetMACgroupaddresse

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