第10章 网络设备基本调试

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1、网络设备基本调试ISSUE1.0日期：杭州华三通信技术有限公司版权所有，未经授权不得使用与传播按照初始目标组建配置完互联网络后，首要的任务是检查网络的连通性为定位网络设备协议或控制参数的配置错误或运行故障，需要使用调试信息引入掌握用ping、tracert命令检查系统连通性掌握使用debug等命令进行网络系统基本调试的方法课程目标学习完本课程，您应该能够：网络连通性测试系统调试目录ping的实现原理RTCRTBRTAecho-requestecho-reply192.168.1.1192.168.1.2192.168.2.1192.168.2.2192.168.3.1pi

2、ng192.168.3.1ping命令的输出[RTA]ping192.168.3.1PING192.168.3.1:56databytes,pressCTRL_CtobreakReplyfrom192.168.3.1:bytes=56Sequence=1ttl=254time=28msReplyfrom192.168.3.1:bytes=56Sequence=2ttl=254time=28msReplyfrom192.168.3.1:bytes=56Sequence=3ttl=254time=28msReplyfrom192.168.3.1:bytes=56Sequenc

3、e=4ttl=254time=27msReplyfrom192.168.3.1:bytes=56Sequence=5ttl=254time=28ms---192.168.3.1pingstatistics---5packet(s)transmitted5packet(s)received0.00%packetlossround-tripmin/avg/max=27/27/28ms使用ping命令ping?-aSelectsourceIPaddress-cSpecifythenumberofechorequeststobesent-fSpecifypacketsn

4、ottobefragmented-hSpecifyTTLvalueforechorequeststobesent-iSelecttheinterfacetosendthepackets-mSpecifytheintervalinmillisecondstosendpackets-nNumericoutputonly.Noattemptwillbemadetolookuphostaddressesforsymbolicnames-pNomorethan8"pad"hexadecimalcharacterstofilloutthesentpacket.Forexample,-

5、pf2willfillthesentpacketwithfand2repeatedly-qQuietoutput.Nothingwillbedisplayedexceptforthesummarylines.-rRecordroute.IncludetheRECORD_ROUTEoptionintheECHO_REQUESTpacketsanddisplaytheroute-sSpecifythenumberofdatabytestobesent-tSpecifythetimeinmillisecondstowaitforeachreply-tosSpecifyTOSva

6、lueforechorequeststobesent-vDisplaythereceivedICMPpacketsotherthanECHO-RESPONSEpackets.STRING<1-20>IPaddressorhostnameofaremotesystemipIPProtocolipv6IPv6Protocoltracert的实现原理RTCRTBRTA(1)(2)echo-requestttl=1192.168.1.1192.168.1.2192.168.2.1192.168.2.2192.168.3.1tracert192.168.3.1ttl-exceede

7、dport-unreachableecho-requestttl=2tracert命令的输出[RTA]tracert192.168.3.1tracerouteto192.168.3.1(192.168.3.1)30hopsmax,40bytespacket,pressCTRL_Ctobreak1192.168.1.217ms17ms17ms2192.168.2.218ms19ms19ms*Oct117:11:02:9732008RTAIPFWD/7/debug_case:Sending,interface=Serial6/0,