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开放式最短路径优先协议（ OSPF ）
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开放式最短路径优先协议（ OSPF ）. 本章内容. OSPF 特殊区域类型 OSPF 虚链路与配置. OSPF 工作原理 OSPF的报文类型 OSPF 的邻居状态与数据库同步 OSPF 的区域概念 OSPF 网络类型 OSPF 基本配置 OSPF 路由器类型 LSA 类型 OSPF 路由汇总与配置. 课程议题. 链路状态路由协议的特点. 链路状态路由协议特征. 对网络发生的变化能够快速响应。 当网络发生变化的时候发送触发式更新（ triggered update ）。 发送周期性更新（链路状态刷新），间隔时间为 30 分钟。. 链路状态数据结构. - PowerPoint PPT Presentation
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OSPF
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OSPFOSPFOSPFOSPFOSPFOSPFOSPFLSAOSPF
OSPFOSPF
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triggered update30
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neighbor tableadjacency databaseOSPFtopology
tableLSDBOSPFLSA,LSALSDBrouting tableforwarding database
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OSPF
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OSPFRIPOSPFOSPFQoSOSPF
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OSPFhello, helloLSALSDBOSPFLSALSDB
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OSPF
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OSPF
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LSDBLSA
LSA1LSA2LSA34LSA5ASLSA6OSPF LSA78BGPLSA91011LSA
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SPFSPFOSPFSPFDijkstraSPFDijkstra
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OSPF
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OSPFOSPFIP5OSPFOSPFOSPF
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OSPFOSPF5HelloDBDLSRLSULSAck
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HelloHelloOSPF224.0.0.5
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HelloHello/Dead intervalsHellohello10dead4hello
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DBD/
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LSALSA5LSA15
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LSALSA2024OSPFLSALSA
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OSPFLSA
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OSPF
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OSPF
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OSPFLSDBLSA320x800000010x7FFFFFFFOSPF30LSALSDB11
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OSPF
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OSPFSPFCPULSDB
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OSPFSPFLSU
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OSPF2-layer hierarchy2
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ID
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OSPFLSA
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OSPF
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OSPFOSPF4
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MultiaccessToken RingDR/BDRDR/BDRDROTHERDR/BDRDROTHERDR/BDR
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DRBDR
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DRBDDR/BDRHellopriorityDRBDR.1RIDRIDDRBDR0OSPFDR/BDRDROTHER
DR/BDRDRBDRDRBDRBDRBDR
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NBMA,ATMX.25 DRBDRLSADRDRDRDRHello30120120
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PPPHDLCOSPFDR/BDRDRBDRHello10dead4040
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DRLSAHello30120120
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Star/hub-and-spokeFull-meshVCn(n-1)/2nPartial-mesh
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OSPFNBMADR/BDRpoint-to-multipointpoint-to-multipointDR/BDR
point-to-multipoint nonbroadcast broadcastpoint-to-point
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OSPFBroadcast:WANLANIPhelloDR/BDRNonbroadcastNBMAIPDR/BDRDR/BDRDROTHER
Point-to-multipointIPHelloDR/BDR
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OSPFPoint-to-multipoint
nonbroadcastVCpoint-to-multipointHelloDR/BDRPoint-to-pointDR/BDR2LANWAN
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NBMA
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point-to-multipoint
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multipoint subinterface
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NBMAOSPF
OSPFNBMAHelloRFC/CISCONBMA30DR/BDRRFC10DR/BDRCISCOLAN30DR/BDRRFCDROSPF30DR/BDRCISCODROSPF10DR/BDRCISCOT1
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OOSPFLSALSAO IAOSPFOSPFLSAO E11LSAO E22
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E1E2E1ASBRASE2ASBRAS
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Show ip router
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OSPF
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OSPFrouter ospf process-idRouter(config)#OSPF network network
wildcard area area-idRouter(config-router)#
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OSPFip ospf cost costRouter(config-if)# ip ospf
retransmit-interval secondsRouter(config-if)#OSPF ip ospf
transmit-delay secondsRouter(config-if)#OSPF
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OSPFip ospf priority priorityRouter(config-if)#OSPF ip ospf
hello-interval secondsRouter(config-if)#hello ip ospf dead-interval
secondsRouter(config-if)#hello
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OSPFip ospf network { broadcast | non-broadcast |
point-to-multipoint }Router(config-if)#OSFP
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Router IDinterface loopback number Router(config)#ip address
address mask Router(config-if)#IP router-id ip-address
Router(config-router)#Router ID
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show ip ospf
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Show ip ospf interface
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Show ip ospf neighbor
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