CCNA第十四章应用帧中继实现广域网连接CICND10S14A.ppt

第十四章应用帧中继实现广域网连接,通过本章的学习，您应该掌握以下内容：了解FrameRelay工作过程配置FrameRelay配置FrameRelay的子端口查看FrameRelay信息,本章目标,FrameRelay概述,使用虚电路进行连接提供面向对象的服务,FrameRelayworkshere.,DCEorFrameRelaySwitch,CSU/DSU,FrameRelay栈,OSI参考模型,FrameRelay,Physical,Presentation,Session,Transport,Network,DataLink,Application,EIA/TIA-232,EIA/TIA-449,V.35,X.21,EIA/TIA-530,FrameRelay,IP/IPX/AppleTalk,etc.,FrameRelay术语,LocalAccessLoop=T1,LocalAccessLoop=64kbps,LocalAccessLoop=64kbps,DLCI:400,PVC,DLCI:500,LMI100=Active400=Active,DLCI:200,DLCI:100,PVC,CSU/DSU,FrameRelay地址映射,从提供商那里得到本地的DLCI号建立目的地址和本地DLCI之间的映射关系,DLCI:500,PVC,10.1.1.1,InverseARPorFrameRelaymap,IP(10.1.1.1),FrameRelay,DLCI(500),FrameRelay信号,Cisco路由器支持三种LMI标准:CiscoANSIT1.617AnnexDITU-TQ.933AnnexA,DLCI:400,PVC,Keepalive,CSU/DSU,DLCI:500,PVC,10.1.1.1,x,LMI500=Active400=Inactive,FrameRelay的反转ARP协议和LMI工作,FrameRelayCloud,1,DLCI=100,DLCI=400,172.168.5.5,172.168.5.7,FrameRelay的反转ARP协议和LMI工作,2,StatusInquiry,2,StatusInquiry,FrameRelayCloud,1,DLCI=100,DLCI=400,172.168.5.5,172.168.5.7,FrameRelay的反转ARP协议和LMI工作,3,LocalDLCI100=Active,4,LocalDLCI400=Active,2,StatusInquiry,2,StatusInquiry,FrameRelayCloud,1,DLCI=100,DLCI=400,3,172.168.5.5,172.168.5.7,FrameRelay的反转ARP协议和LMI工作,4,Hello,Iam172.168.5.5.,3,LocalDLCI100=Active,4,LocalDLCI400=Active,2,StatusInquiry,2,StatusInquiry,FrameRelayCloud,1,DLCI=100,DLCI=400,3,172.168.5.5,172.168.5.7,FrameRelay的反转ARP协议和LMI工作,Hello,Iam172.168.5.7.,4,5,FrameRelayMap172.168.5.5DLCI400Active,FrameRelayCloud,DLCI=100,DLCI=400,FrameRelayMap172.168.5.7DLCI100Active,5,172.168.5.5,172.168.5.7,FrameRelay的反转ARP协议和LMI工作,Hello,Iam172.168.5.7.,4,5,FrameRelayMap172.168.5.5DLCI400Active,FrameRelayCloud,DLCI=100,DLCI=400,FrameRelayMap172.168.5.7DLCI100Active,5,Hello,Iam172.168.5.5.,6,172.168.5.5,172.168.5.7,FrameRelay的反转ARP协议和LMI工作,Keepalives,Keepalives,Hello,Iam172.168.5.7.,4,5,FrameRelayMap172.168.5.5DLCI400Active,FrameRelayCloud,DLCI=100,DLCI=400,FrameRelayMap172.168.5.7DLCI100Active,5,Hello,Iam172.168.5.5.,6,7,7,172.168.5.5,172.168.5.7,Rel.11.2Router,Rel.10.3Router,interfaceSerial1ipaddress10.16.0.1255.255.255.0encapsulationframe-relaybandwidth64,interfaceSerial1ipaddress10.16.0.2255.255.255.0encapsulationframe-relaybandwidth64frame-relaylmi-typeansi,HQ,Branch,配置FrameRelay,反转ARP缺省情况下是激活的在配置输出信息中看不出来,Rel.11.2Router,Rel.10.3Router,HQ,interfaceSerial1ipaddress10.16.0.1255.255.255.0encapsulationframe-relaybandwidth64,interfaceSerial1ipaddress10.16.0.2255.255.255.0encapsulationframe-relaybandwidth64frame-relaylmi-typeansi,Branch,配置FrameRelay,DLCI=110IPaddress=10.16.0.1/24,p1r1,DLCI=100IPaddress=10.16.0.2/24,interfaceSerial1ipaddress10.16.0.1255.255.255.0encapsulationframe-relaybandwidth64frame-relaymapip10.16.0.2110broadcast,HQ,Branch,配置静态的FrameRelay映射,查看FrameRelay信息,显示协议、DLCI、和LMI的相关信息,Router#showinterfaces0Serial0isup,lineprotocolisupHardwareisHD64570Internetaddressis10.140.1.2/24MTU1500bytes,BW1544Kbit,DLY20000usec,rely255/255,load1/255EncapsulationFRAME-RELAY,loopbacknotset,keepaliveset(10sec)LMIenqsent19,LMIstatrecvd20,LMIupdrecvd0,DTELMIupLMIenqrecvd0,LMIstatsent0,LMIupdsent0LMIDLCI1023LMItypeisCISCOframerelayDTEFRSVCdisabled,LAPFstatedownBroadcastqueue0/64,broadcastssent/dropped8/0,interfacebroadcasts5Lastinput00:00:02,output00:00:02,outputhangneverLastclearingofshowinterfacecountersneverQueueingstrategy:fifoOutputqueue0/40,0drops;inputqueue0/75,0drops,显示LMI信息,Router#showframe-relaylmiLMIStatisticsforinterfaceSerial0(FrameRelayDTE)LMITYPE=CISCOInvalidUnnumberedinfo0InvalidProtDisc0InvaliddummyCallRef0InvalidMsgType0InvalidStatusMessage0InvalidLockShift0InvalidInformationID0InvalidReportIELen0InvalidReportRequest0InvalidKeepIELen0NumStatusEnq.Sent113100NumStatusmsgsRcvd113100NumUpdateStatusRcvd0NumStatusTimeouts0,查看FrameRelay信息,显示PVC数据通讯信息,查看FrameRelay信息,Router#showframe-relaypvc100PVCStatisticsforinterfaceSerial0(FrameRelayDTE)DLCI=100,DLCIUSAGE=LOCAL,PVCSTATUS=ACTIVE,INTERFACE=Serial0inputpkts28outputpkts10inbytes8398outbytes1198droppedpkts0inFECNpkts0inBECNpkts0outFECNpkts0outBECNpkts0inDEpkts0outDEpkts0outbcastpkts10outbcastbytes1198pvccreatetime00:03:46,lasttimepvcstatuschanged00:03:47,显示路由信息,Router#showframe-relaymapSerial0(up):ip10.140.1.1dlci100(0 x64,0 x1840),dynamic,broadcast,statusdefined,active,查看FrameRelay信息,清除动态的FrameRelay映射关系,查看FrameRelay信息,Router#showframe-relaymapSerial0(up):ip10.140.1.1dlci100(0 x64,0 x1840),dynamic,broadcast,statusdefined,activeRouter#clearframe-relay-inarpRouter#shframemapRouter#,显示LMI的调试信息,查看FrameRelay信息,Router#debugFramelmiFrameRelayLMIdebuggingisonDisplayingallFrameRelayLMIdataRouter#1w2d:Serial0(out):StEnq,myseq140,yourseen139,DTEup1w2d:datagramstart=0 xE008EC,datagramsize=131w2d:FRencap=0 xFCF103091w2d:007501010103028C8B1w2d:1w2d:Serial0(in):Status,myseq1401w2d:RTIE1,length1,type11w2d:KAIE3,length2,yourseq140,myseq1401w2d:Serial0(out):StEnq,myseq141,yourseen140,DTEup1w2d:datagramstart=0 xE008EC,datagramsize=131w2d:FRencap=0 xFCF103091w2d:007501010103028D8C1w2d:1w2d:Serial0(in):Status,myseq1421w2d:RTIE1,length1,type01w2d:KAIE3,length2,yourseq142,myseq1421w2d:PVCIE0 x7,length0 x6,dlci100,status0 x2,bw0,Star(HubandSpoke),FullMesh,PartialMesh,FrameRelaydefault:nonbroadcast,multiaccess(NMBA),选择FrameRelay拓扑结构,问题:广播帧必须复制给其它已经建立的连接,RoutingUpdate,A,C,B,路由信息的可达性,B,C,D,A,实现路由信息的可达性,解决方法:在NBMA环境的网络中使用水平分割可能造成一些问题划分子端口可以解决水平分割造成的问题一个物理端口可以被划分成多个逻辑意义上的子端口,SubnetA,SubnetB,SubnetC,S0,PhysicalInterface,LogicalInterface,子端口的配置,点到点子端口看作是专线每一个点到点连接的子端口要求由自己的子网适用于星型拓扑结构多点子端口应用在NBMA网络，因此它们无法解决水平分割所带来的问题由于使用的是单独的子网可以保存地址空间适用于partial-mesh和full-mesh拓扑结构中,A,10.17.0.1s0.2,B,配置点到点的子端口,interfaceSerial0noipaddressencapsulationframe-relay!interfaceSerial0.2point-to-pointipaddress10.17.0.1255.255.255.0bandwidth64frame-relayinterface-dlci110!interfaceSerial0.3point-to-pointipaddress10.18.0.1255.255.255.0bandwidth64frame-relayinterface-dlci120!,s0.310.18.0.1,C,10.17.0.2,10.18.0.2,DLCI=110,DLCI=120,interfaceSerial2noipaddressencapsulationframe-relay!interfaceSerial2.2multipointipaddress10.17.0.1255.255.255.0bandwidth64frame-relaymapip10.17.0.2120broadcastframe-relaymapip10.17.0.3130broadcastframe-relaymapip10.17.0.4140broadcast,s2.1=10.17.0.2/24,s2.2=10.17.0.1/24,s2.1=10.17.0.4/24,s2.1=10.1