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1、MultilinkPPP及LFI(Linkfragementandinterleave)Multilink可以理解成ethernetchannel,也是对把链路捆绑成一条逻辑链路。条件为低于或等于768kbps的链路，由于带宽很低，延迟太大，将对语音或视频的通信带来麻烦。而MultilinkPPP(MLP)技术为了能够提高链路带宽，允许同时将多根低速链路捆绑成逻辑上单一的链路(1544带宽的串行链路也可以捆绑)，称为bundle在下面的拓扑中，在R2和R3之间增加一条链路，用以建立multilink实验步骤：步骤1
2、、创建Multilink去掉原始的S2/0的地址，因为我们的IP地址要配置在逻辑链路上。创建multilink链路R2：interfaceSerial2/0noipaddressencapsulationpppserialrestart-delay0pppmultilinkpppmultilinkgroup1interfaceSerial2/1noipaddressencapsulationpppserialrestart-delay0pppmultilinkpppmultilinkgroup1interfaceM
3、ultilink1ipaddress23.1.1.2255.255.255.0pppmultilinkpppmultilinkgroup1R2#shintmultilink1Multilink1isup,lineprotocolisupHardwareismultilinkgroupinterfaceInternetaddressis23.1.1.2/24MTU1500bytes,BW3088Kbit/sec带宽变成了原来的1544*2,DLY100000usec,reliability255/255,txload
4、1/255,rxload1/255EncapsulationPPP,LCPOpen,multilinkOpenOpen:IPCP,CDPCP,loopbacknotsetKeepaliveset(10sec)DTRispulsedfor2secondsonresetLastinput00:00:02,outputnever,outputhangneverLastclearingof"showinterface"counters00:01:30Inputqueue:0/75/0/0(size/max/drops/fl
5、ushes);Totaloutputdrops:0Queueingstrategy:fifoOutputqueue:0/40(size/max)5minuteinputrate0bits/sec,0packets/sec5minuteoutputrate0bits/sec,0packets/sec27packetsinput,2038bytes,0nobufferReceived0broadcasts,0runts,0giants,0throttles0inputerrors,0CRC,0frame,0overru
6、n,0ignored,0abort28packetsoutput,2398bytes,0underruns0outputerrors,0collisions,2interfaceresets0unknownprotocoldrops0outputbufferfailures,0outputbuffersswappedout0carriertransitionsR2#shpppmultilinkMultilink1Bundlename:R3RemoteEndpointDiscriminator:[1]R3LocalE
7、ndpointDiscriminator:[1]R2远程分离节点为R3，本地为R2Bundleupfor00:10:41,totalbandwidth3088,load1/255Receivebufferlimit24000bytes,fragtimeout1000ms0/0fragments/bytesinreassemblylist0lostfragments,7reordered0/0discardedfragments/bytes,0lostreceived0xB5receivedsequence,0xB2
8、sentsequenceMemberlinks:2active,0inactive(maxnotset,minnotset)Se2/0,since00:10:41Se2/1,since00:10:40两条链路是active的，分别为S2/0和S2/1Noinactivemultilinkinterfaces步骤2把police应用在multilink链路上R
