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December 2020

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Collaborator

困扰很久的问题,2960交换机接口总是自动up/down

本帖最后由 maguanghua2013 于 2016-11-29 15:08 编辑
我们这边机房有几台2960做接入交换机,这些交换机的log上显示,总是有一些接口down掉3~4秒之后自动up。
.Nov 13 10:43:29 Beijing: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/17, changed state to down
.Nov 13 10:43:30 Beijing: %LINK-3-UPDOWN: Interface GigabitEthernet0/17, changed state to down
.Nov 13 10:43:47 Beijing: %LINK-3-UPDOWN: Interface GigabitEthernet0/17, changed state to up
.Nov 13 10:43:48 Beijing: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/17, changed state to up


.Nov 17 13:01:05 Beijing: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/37, changed state to down
.Nov 17 13:01:06 Beijing: %LINK-3-UPDOWN: Interface GigabitEthernet0/37, changed state to down
.Nov 17 13:01:09 Beijing: %LINK-3-UPDOWN: Interface GigabitEthernet0/37, changed state to up
.Nov 17 13:01:10 Beijing: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/37, changed state to up


.Nov 17 13:24:22 Beijing: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/37, changed state to down
.Nov 17 13:24:23 Beijing: %LINK-3-UPDOWN: Interface GigabitEthernet0/37, changed state to down
.Nov 17 13:24:26 Beijing: %LINK-3-UPDOWN: Interface GigabitEthernet0/37, changed state to up
.Nov 17 13:24:27 Beijing: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/37, changed state to up


.Nov 19 20:12:14 Beijing: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/32, changed state to down
.Nov 19 20:12:15 Beijing: %LINK-3-UPDOWN: Interface GigabitEthernet0/32, changed state to down
.Nov 19 20:12:16 Beijing: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/28, changed state to down
.Nov 19 20:12:17 Beijing: %LINK-3-UPDOWN: Interface GigabitEthernet0/28, changed state to down
.Nov 19 20:12:19 Beijing: %LINK-3-UPDOWN: Interface GigabitEthernet0/32, changed state to up
.Nov 19 20:12:20 Beijing: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/32, changed state to up
.Nov 19 20:12:23 Beijing: %LINK-3-UPDOWN: Interface GigabitEthernet0/28, changed state to up
.Nov 19 20:12:24 Beijing: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/28, changed state to up


.Nov 20 17:20:56 Beijing: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/17, changed state to down
.Nov 20 17:20:57 Beijing: %LINK-3-UPDOWN: Interface GigabitEthernet0/17, changed state to down
.Nov 20 17:20:59 Beijing: %LINK-3-UPDOWN: Interface GigabitEthernet0/17, changed state to up
.Nov 20 17:21:00 Beijing: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/17, changed state to up


.Nov 20 17:25:43 Beijing: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/17, changed state to down
.Nov 20 17:25:44 Beijing: %LINK-3-UPDOWN: Interface GigabitEthernet0/17, changed state to down
.Nov 20 17:25:46 Beijing: %LINK-3-UPDOWN: Interface GigabitEthernet0/17, changed state to up
.Nov 20 17:25:47 Beijing: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/17, changed state to up

这台交换机型号是(C2960S-UNIVERSALK9-M), Version 12.2(55)SE7
在2960X上也有类似的情况:(C2960X-HBOOT-M) Version 15.2(2r)E1
服务器也没有重启,上面有一些对网络敏感的心跳业务有时候是能感知的,有时候又完全感知不到
这是什么原因导致的?网线不好?
14 条回复14
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Mentor

感谢您的提问!:)稍后会有小伙伴为您解答的!:)
Highlighted
Cisco Employee

如果有条件,能不能选择其中一个接口,接PC,观察一下是否还会up/down ?
Highlighted
Participant

排除网线,水晶头,端口模式(全双工,半双工,自动模式)
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2960在很多地方都有这个问题,没有规律,不知道和硬件有没有关系
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有客户2-3年了,问题依旧,该排查的全排查了,也是2960
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Collaborator

fushuang 发表于 2016-11-29 21:53 back.gif
如果有条件,能不能选择其中一个接口,接PC,观察一下是否还会up/down ?

试过换网线,调整交换机接口,都不行……在托管机房,不好放PC进去
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Collaborator

pxhen 发表于 2016-11-30 08:20 back.gif
排除网线,水晶头,端口模式(全双工,半双工,自动模式)

都看过了,接口状态,还有CRC校验什么的都看了
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Collaborator

odljm 发表于 2016-11-30 12:17 back.gif
不错不错,楼主是个绝对高手

欸,算啥高手,问题都解决不了
Highlighted
Rising star

问题可能出在STP上。
没人了解你现场的情况,又怎能保证100%解决你的问题呢。
Highlighted
Beginner

樓主, 我也遇到同樣的問題 。請大神指條明路啊 。
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Beginner

同样怀疑是STP 或者MAC地址冲突引起的error down,可以show一下看看;另外建议看下当前版本,去找版本说明,看看是不是触发了已知bug
Highlighted
Participant

没试着使用其他型号的交换机替换一下?
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Beginner

尝试开起spanning-tree portfast,我也遇到过
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Collaborator

路漫漫 发表于 2020-6-17 15:43
樓主, 我也遇到同樣的問題 。請大神指條明路啊 。

哈哈,16年发的贴了。。我都从这家公司离职了。
后来这个问题查到了,就是托管IDC布的那一批网线有问题,非常坑。