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1、帧中继概述和配置©2007CiscoSystems,Inc.Allrightsreserved.ICND2v1.0—8-1帧中继概述帧中继交换机帧中继链路©2007CiscoSystems,Inc.Allrightsreserved.ICND2v1.0—8-2帧中继虚电路(PVC)©2007CiscoSystems,Inc.Allrightsreserved.ICND2v1.0—8-3帧中继术语©2007CiscoSystems,Inc.Allrightsreserved.ICND2v1.0—8-4帧
2、中继地址映射°LMI接收来自帧中继交换机在本地有效的DLCI。°反向ARP将本地DLCI映射到远程路由器的IP地址。©2007CiscoSystems,Inc.Allrightsreserved.ICND2v1.0—8-5帧中继信令LMICisco支持三种LMI标准:°Cisco°ANSIT1.617AnnexD°ITU-TQ.933AnnexA©2007CiscoSystems,Inc.Allrightsreserved.ICND2v1.0—8-6配置帧中继(动态映射)interfaceSerial
3、0interfaceSerial0noshutdownnoshutdownipaddress10.1.1.2255.255.255.0ipaddress10.1.1.3255.255.255.0encapsulationframe-relayencapsulationframe-relayIproute33110255255255010113Iproute33.1.1.0255.255.255.010.1.1.3Iproute22110255255255010112Iproute22.1.1.0255
4、.255.255.010.1.1.2©2007CiscoSystems,Inc.Allrightsreserved.ICND2v1.0—8-7验证帧中继配置在R2上显示有关帧中继DLCI和LMI的信息R2#showinterfaceserial0Serial0isup,lineprotocolisupHardwareisHD64570Internetaddressis10.1.1.2/24MTU1500bytes,BW1544Kbit,DLY20000usec,reliability255/255,t
5、xload1/255,rxload1/255EncapsulationFRAME-RELAY,loopbacknotsetKeepaliveset(0sec)eset(10sec)LMIenqsent66,LMIstatrecvd67,LMIupdrecvd0,DTELMIupLMIenqrecvd0,LMIstatsent0,LMIupdsent0LMIDLCI1023LMItypeisCISCOframerelayDTEBroadcastqueue0/64,broadcastssent/dropp
6、ed2/0,interfacebroadcasts0Lastinput00:00:09Lastinput00:00:09,output00:00:09output00:00:09,outputoutputhangneverhangneverLastclearingof"showinterface"counters00:11:09Inputqueue:0/75/0/0(size/max/drops/flushes);Totaloutputdrops:0Queueingstrategy:weightedf
7、airOutputqueue:0/1000/64/0(size/maxtotal/threshold/drops)Conversations0/1/2560/1/256(active/maxactive/maxtotal)(active/maxactive/maxtotal)ReservedConversations0/0(allocated/maxallocated)AvailableBandwidth1158kilobits/sec5minuteinputrate0bits/sec,0packet
8、s/sec5minuteoutputrate0bits/sec,0packets/sec©2007CiscoSystems,Inc.Allrightsreserved.ICND2v1.0—8-8验证LMI类型R1#showframe-relaylmiLMIStatisticsforinterfaceSerial0(FrameRelayDTE)LMITYPE=CISCOInvalidUnnumberedinfo0InvalidProtDisc0Invali