困扰很久的问题，2960交换机接口总是自动up/down

[Mansur]

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？

[zero.xia]

感谢您的提问！:)稍后会有小伙伴为您解答的！:)

[Fusen Huang]

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 ?

[pxhen]

排除网线，水晶头，端口模式（全双工，半双工，自动模式）

[suzhouxiaoniu]

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

[suzhouxiaoniu]

有客户2-3年了，问题依旧，该排查的全排查了，也是2960

[Mansur]

fushuang 发表于 2016-11-29 21:53
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

[Mansur]

pxhen 发表于 2016-11-30 08:20
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

[Mansur]

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

欸，算啥高手，问题都解决不了

[Xingxing Zhang]

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。

[路漫漫]

樓主， 我也遇到同樣的問題 。請大神指條明路啊 。

[Cheven]

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

[18653465190]

没试着使用其他型号的交换机替换一下？

[huihuxu735715]

尝试开起spanning-tree portfast，我也遇到过

[Mansur]

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。