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Lei Zhang
Cisco Employee
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09-05-2013
08-29-2018
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【原创】N9K (Tahoe 芯片) ELAM
03-19-2018
本帖最后由 leiz2 于 2018-3-19 16:28 编辑 一、简介在排查网络丢包的故障时,我们可以用ELAM工具在数据包沿途设备抓包来定位被丢弃的数据包是被哪台设备所丢弃,也就是确定故障源。之后,对故障源进一步排查。本文主要介绍如何在N9K (Tahoe 芯片)配置ELAM,并且解释ELAM相关的输出信息。二、拓扑N93180 (Eth1/53, vlan 1235, 12.35.1.2) --- (Eth1/53, vlan 1235, 12.35.1.1) N92160使用ping...
请教关于WS-C4506-E的问题(VFE?NFE?)
03-14-2017
CSCO11030694 发表于 2017-3-14 19:33多谢回复!我还是想继续追加一下提问,设备当前CPU利用率不到5%,一台4506就一块板卡也只用了6个口,每 ...你好!VFE和NFE芯片,是固定在引擎上的。温度高与设备负载、配置无关。检查一下风扇是否有灰尘、是否有遮挡物影响散热、机房温度。如果100%排除环境因素,请开TAC case,请TAC帮忙排查硬件是否有问题,软件是否误报等。谢谢!
请教关于WS-C4506-E的问题(VFE?NFE?)
03-14-2017
你好!VFE和NFE是引擎上的两个芯片。VFE=very fast engineNFE=netflow enginelog和输出显示,是这两个芯片温度过高了。谢谢!
请教关于WS-C4506-E的问题(VFE?NFE?)
03-14-2017
你好!VFE和NFE是引擎上的两个芯片。VFE=very fast engineNFE=netflow enginelog和输出显示,是这两个芯片温度过高了。谢谢!
Cisco 4507报Mac地址全为0 log
03-05-2017
你好!这个log其实表述的比较清楚了,大意就是说某接口某vlan收到了一个原mac为全0的数据包。思科设备对于原mac为全0或者组播mac是不进行学习的,直接drop。弹出该log进行提示。首先说,原mac为全0,一定是不正常的,因为不论数据包是PC、router、switch、server发出或者重封装,原mac都不应该是全0。其次,通过log提示出的接口进行SPAN抓包,double check是否4507真的收到了这样的原mac。如果真的收到了这样的原mac,则需要向该接口下联设备检查,甚...
POE端口报错
03-03-2017
你好!根据你的描述,更换过交换机,也换过端口。可见该问题指向到了你所提到的IP电话,建议换个IP电话或者其他PoE设备进行测试。如果更换了IP电话或者其他PoE设备后,该故障消失,则证明故障由初始IP电话引起。(当前,现在基本也可以确定该故障与交换机无关)谢谢!
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Community Statistics
Member Since
09-05-2013
01:02 AM
Date Last Visited
08-29-2018
12:01 AM
Posts
72
Total Helpful Votes Received
456
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Yanli Sun
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byl_qware_com
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shuangbao wang
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yinba
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