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1、TroubleShotingtheRouterInterfaceProblemRoutershowinterfacesCommandRouter#showinterfacesEthernet0isup,lineprotocolisupHardwareisLance,addressis00e0.1e5d.ae2f(bia00e0.1e5d.ae2f)Internetaddressis10.1.1.11/24MTU1500bytes,BW10000Kbit,DLY1000usec,rely255/255,load1/255En
2、capsulationARPA,loopbacknotset,keepaliveset(10sec)ARPtype:ARPA,ARPTimeout04:00:00Lastinput00:00:07,output00:00:08,outputhangneverLastclearingof"showinterface"countersneverQueueingstrategy:fifoOutputqueue0/40,0drops;inputqueue0/75,0drops5minuteinputrate0bits/sec,0p
3、ackets/sec5minuteoutputrate0bits/sec,0packets/sec81833packetsinput,27556491bytes,0nobufferReceived42308broadcasts,0runts,0giants,0throttles1inputerrors,0CRC,0frame,0overrun,1ignored,0abort0inputpacketswithdribbleconditiondetected55794packetsoutput,3929696bytes,0un
4、derruns0outputerrors,0collisions,1interfaceresets0babbles,0latecollision,4deferred0lostcarrier,0nocarrier0outputbufferfailures,0outputbuffersswappedoutInterpretingtheInterfaceStatusReasonforinterfacedownproblemSerial1isadministrativelydown,Lineprotocolisdown没有使用no
5、shutdown命令激活端口Serial1isdown,Lineprotocolisdown 1.对方没有noshutdown激活端口2.线路损坏,接口没有任何连接线缆Serial1isup,lineprotocolisdown 1.没有配置相同的二层协议,serial接口defaultencapsulation:HDLC 2.可能没有配置时钟频率Serial1isup,lineprotocolisup接口工作正常SerialInterfaceshowcontrollerCommandRouter#showcontroll
6、erserial0HDunit0,idb=0x121C04,driverstructureat0x127078buffersize1524HDunit0,V.35DTEcable...ShowsthecabletypeofserialcablesV.35DTECableVerifyingaSerialInterfaceConfigurationRouter#showinterfaceserial0Serial0isup,lineprotocolisupHardwareisHD64570Internetaddressis10
7、.140.4.2/24MTU1500bytes,BW64Kbit,DLY20000usec,rely255/255,load1/255EncapsulationHDLC,loopbacknotset,keepaliveset(10sec)Lastinput00:00:09,output00:00:04,outputhangneverLastclearingof"showinterface"countersneverInputqueue:0/75/0(size/max/drops);Totaloutputdrops:0Que
8、ueingstrategy:weightedfairOutputqueue:0/1000/64/0(size/maxtotal/threshold/drops)Conversations0/1/256(active/maxactive/maxtotal)ReservedConversations0/0(
