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局域网出现port “假死状态” [复制链接]

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发表于 2012-07-25 17:32 |显示全部楼层
我的2960交换机,一些端口工作一段时间后就不能通行了,sh int status 显示“connected”,但是电脑已经不能上网了,5分钟以后会reset,正常通信,也可以 进入到端口 shut之后再up,可立即恢复工作。

请问是什么原因呢?我做了镜像端口后抓了一些包,发现这些,是正常的么?


1151        4.446096        18:03:73:c0:b2:f8        Broadcast        ARP        Who has 10.200.96.1?  Tell 10.200.96.84

这种包特别多。

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发表于 2012-07-25 17:41 |显示全部楼层
本帖最后由 gooutya1 于 2012-07-25 17:44 编辑

请高手指点

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发表于 2012-07-26 12:03 |显示全部楼层
STP? Port security?
可立即恢复工作? 你用了no spanning ?

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发表于 2012-07-26 12:11 |显示全部楼层
看看控制台有什么信息吐出来。

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发表于 2012-07-27 08:57 |显示全部楼层
本帖最后由 gooutya1 于 2012-07-27 08:58 编辑

我得局域网里面一直不稳定,不定时断网,断的时候,电脑上面的网络连接显示正常,交换机上的口也显示“connected”,但是就是data传输不了。要等几分钟之后又能恢复。

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发表于 2012-07-27 09:16 |显示全部楼层
Log Buffer (4096 bytes):
%LINK-3-UPDOWN: Interface FastEthernet0/31, changed state to down
1d02h: %LINK-3-UPDOWN: Interface FastEthernet0/31, changed state to up
1d02h: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/31, changed state to up
1d03h: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/39, changed state to down
1d03h: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/39, changed state to up
1d03h: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/39, changed state to down
1d03h: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/39, changed state to up
1d03h: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/3, changed state to down
1d03h: %LINK-3-UPDOWN: Interface FastEthernet0/3, changed state to down
1d03h: %LINK-3-UPDOWN: Interface FastEthernet0/3, changed state to up
1d03h: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/3, changed state to up
1d03h: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/3, changed state to down
1d03h: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/3, changed state to up
1d03h: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/28, changed state to down
1d03h: %LINK-3-UPDOWN: Interface FastEthernet0/28, changed state to down
1d03h: %LINK-3-UPDOWN: Interface FastEthernet0/28, changed state to up
1d03h: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/28, changed state to up
1d03h: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/28, changed state to down
1d03h: %LINK-3-UPDOWN: Interface FastEthernet0/28, changed state to down
1d03h: %LINK-3-UPDOWN: Interface FastEthernet0/28, changed state to up
1d03h: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/28, changed state to up
1d03h: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/28, changed state to down
1d03h: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/28, changed state to up
1d03h: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/22, changed state to down
1d03h: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/22, changed state to up
1d04h: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/31, changed state to down
1d04h: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/31, changed state to up
1d04h: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/31, changed state to down
1d04h: %LINK-3-UPDOWN: Interface FastEthernet0/31, changed state to down
1d04h: %LINK-3-UPDOWN: Interface FastEthernet0/31, changed state to up
1d04h: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/31, changed state to up
1d05h: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/27, changed state to down
1d05h: %LINK-3-UPDOWN: Interface FastEthernet0/27, changed state to down
1d05h: %LINK-3-UPDOWN: Interface FastEthernet0/27, changed state to up
1d05h: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/27, changed state to up
1d07h: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/30, changed state to down
1d07h: %LINK-3-UPDOWN: Interface FastEthernet0/30, changed state to down
1d08h: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/37, changed state to down
1d08h: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/37, changed state to up
1d08h: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/17, changed state to down
1d08h: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/17, changed state to up
1d08h: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/42, changed state to down
1d08h: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/42, changed state to up
1d22h: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/42, changed state to down
1d22h: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/42, changed state to up
1d22h: %LINK-3-UPDOWN: Interface FastEthernet0/30, changed state to up
1d22h: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/30, changed state to up

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发表于 2012-08-01 16:57 |显示全部楼层
线有问题? duplex mismatch? swap 一下端口看看是端口的问题还是线的问题

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发表于 2012-08-03 08:45 |显示全部楼层
一、网线质量是否达标,建议做一下测试。
二、速率与双工协商是否有问题,可以手动设置一下。
三、环境中是否有较强的干扰源?

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发表于 2012-08-15 16:41 |显示全部楼层
hello,问题找到了,是arp攻击,有一个mac地址总是扮演我的网关进行arp回复
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