交换机端口错包查方法.doc

交换机端口错包排查方法 已有 55 次阅读? 2009-07-06 10:41 ? 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]dis int eth 0/1 Ethernet0/1 current state : UP IP Sending Frames Format is PKTFMT_ETHNT_2, Hardware address is 000f-e21d-bedc Description: to gujiao_33-192.168.86.161 The Maximum Transmit Unit is 1500 Media type is twisted pair, loopback not set Port hardware type is 100_BASE_TX 100Mbps-speed mode, full-duplex mode Link speed type is force link, link duplex type is force link Flow-control is not enabled Port-flow-constrain has not been configured completely The Maximum Frame Length is 1536 Broadcast MAX-ratio: 100% PVID: 10 Mdi type: auto Port link-type: hybrid ??Tagged?? VLAN ID : , 99 ??Untagged VLAN ID : , 10, 458 Last 300 seconds input:??0 packets/sec 11 bytes/sec Last 300 seconds output:??7 packets/sec 520 bytes/sec Input(total):?packets, 6684922188 bytes ???????? 66707 broadcasts, 9522 multicasts Input(normal):??- packets, - bytes ???????? - broadcasts, - multicasts?????? Input:??0 input errors, 0 runts, 0 giants,??- throttles, 0 CRC ???????? 0 frame,??- overruns, 0 aborts, 0 ignored, - parity errors Output(total):packets, 5178275457 bytes ???????? 3638352 broadcasts, 288120 multicasts, 0 pauses Output(normal): - packets, - bytes ???????? - broadcasts, - multicasts, - pauses Output: 0 output errors,??- underruns, - buffer failures ???????? 0 aborts, 0 deferred, 0 collisions, 0 late collisions ???????? 0 lost carrier, - no carrier 如上红字所示： 输入错误数，input errors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，或减少不能实现的参数。 1.Runts: discarded packets that are smaller than the mediums minimum packet size. (?? Receive Byte Count 64 and NOT CRC Error?? or??Receive Byte Count 64 and Tag Packet and NOT CRC Error， 无论是否有vlan tag，数据段小于64字节，而且没有CRC校验错误的帧。) 2.Giants: