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1、交换机端口错包排查方法已有55次阅读 2009-07-0610:41 标签: 交换机 设置 一、重要性：从网维排查的用户反应网速慢的故障中，相当一部分是由于交换机和交换机端口、交换机端口和用户路由器端口、交换机端口和光电转换器端口、交换机端口和用户网卡匹配不当，产生错包引起的。该问题虽然比较常见，但只要按交换机开局来配置，通常能降低故障发生率，即使还存在端口错包问题，也能通过改端口速度和双工状态来彻底解决。二、交换机端口错包说明：以华为交换机端口为例进行说明：[NJ-A-GJXC-S3026C-1]disinteth0/1Ethernet0/1currentstate:UPIPSendin
2、gFrames'FormatisPKTFMT_ETHNT_2,Hardwareaddressis000f-e21d-bedcDescription:togujiao_33-192.168.86.161TheMaximumTransmitUnitis1500Mediatypeistwistedpair,loopbacknotsetPorthardwaretypeis100_BASE_TX100Mbps-speedmode,full-duplexmodeLinkspeedtypeisforcelink,linkduplextypeisforcelinkFlow-controlisnotenab
3、ledPort-flow-constrainhasnotbeenconfiguredcompletelyTheMaximumFrameLengthis1536BroadcastMAX-ratio:100%PVID:10Mditype:autoPortlink-type:hybrid Tagged VLANID:,99 UntaggedVLANID:,10,458Last300secondsinput: 0packets/sec11bytes/secLast300secondsoutput: 7packets/sec520bytes/secInput(total): 118644
4、83packets,6684922188bytes 66707broadcasts,9522multicastsInput(normal): -packets,-bytes -broadcasts,-multicasts Input: 0inputerrors,0runts,0giants, -throttles,0CRC 0frame, -overruns,0aborts,0ignored,-parityerrorsOutput(total):12008069packets,5178275457bytes 3638
5、352broadcasts,288120multicasts,0pausesOutput(normal):-packets,-bytes -broadcasts,-multicasts,-pausesOutput:0outputerrors, -underruns,-bufferfailures 0aborts,0deferred,0collisions,0latecollisions 0lostcarrier,-nocarrier如上红字所示：输入错误数，inputerrors等于各种重要错误信息的总和。不同的产品可以根据具体情况增加其它参数，
6、或减少不能实现的参数。1.Runts:discardedpacketsthataresmallerthanthemedium'sminimumpacketsize.( ReceiveByteCount<64andNOTCRCError or ReceiveByteCount<64andTagPacketandNOTCRCError，无论是否有vlantag，数据段小于64字节，而且没有CRC校验错误的帧。)2.Giants:discardedpacketsthatarelargerthanthemedium'smaximumpacketsize.( ReceiveByteCount
7、>1518andNOTCRCError or ReceiveByteCount>1522andTagPacketandNOTCRCError，没有vlantag，数据段大于1518字节，小于最大帧长度，而且没有CRC校验错误的帧，和有vlantag，数据段大于1522字节，小于最大帧长度，而且没有CRC校验错误的帧。)3.Throttles:discardedpacketsthatareincompleteframe
