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灵异事件：有条链路下班就Down，上班了又自动UP
作者:大漠孤沙 日期:2010-07-08
早上刚在想，章鱼哥怎么这么灵验，这回真的是西班廾胜了德国，没想到公司里也出灵异事件了！
公司里一条简单得不能太简单的链路：数百米长的光纤，两端通过收发器，一头接到上行设备Cisco 3550，另一头接到Cisco2960，配置了Trunk，下边只有一个Vlan 23。交换机配置简单得不能再简单，平常得不能再平常。
最近发现：每到下班后，这条链路上的Trunk端口就自动Down掉了，而到快上班的时候，端口又能自动UP起了！
想了很多原因：网络病毒、端口问题、交换机问题、配置问题，链路问题，一一排查，都没找到原因。就算把下边所有的电脑都关机，晚上线路问题照旧出现。。。
最近的日志：
引用内容
2010-7-8 07:48 Switch is responding again. Response time is 0 milliseconds
2010-7-8 07:41 Switch has stopped responding (Request Timed Out)
2010-7-8 07:36 Switch is responding again. Response time is 1 milliseconds
2010-7-8 07:29 Switch has stopped responding (Request Timed Out)
2010-7-8 07:26 Switch is responding again. Response time is 0 milliseconds
2010-7-7 17:35 Switch has stopped responding (Request Timed Out)
2010-7-7 17:31 Switch is responding again. Response time is 0 milliseconds
2010-7-7 17:30 Switch rebooted at 2010-7-7 17:28
2010-7-7 17:29 Switch has stopped responding (Request Timed Out)
2010-7-7 17:03 Switch is responding again. Response time is 0 milliseconds
端口配置：
下端Cisco2960（后来换成3560）：
引用内容
switch-23net#sho run int fa0/24
Building configuration…
Current configuration : 224 bytes
!
Interface FastEthernet0/24
description up_3550-fa01
switchport trunk encapsulation dot1q
switchport mode trunk
logging event trunk-status
logging event spanning-tree
logging event status
speed 100
duplex full
end
上行设备Cisco3550的端口配置：
引用内容
cisco3550#sho run int fa0/1
Building configuration…
Current configuration : 248 bytes
!
Interface FastEthernet0/1
description to_23net
switchport trunk encapsulation dot1q
switchport mode trunk
logging event trunk-status
logging event bundle-status
logging event spanning-tree
logging event status
duplex full
speed 100
end
公司里一条简单得不能太简单的链路：数百米长的光纤，两端通过收发器，一头接到上行设备Cisco 3550，另一头接到Cisco2960，配置了Trunk，下边只有一个Vlan 23。交换机配置简单得不能再简单，平常得不能再平常。
最近发现：每到下班后，这条链路上的Trunk端口就自动Down掉了，而到快上班的时候，端口又能自动UP起了！
想了很多原因：网络病毒、端口问题、交换机问题、配置问题，链路问题，一一排查，都没找到原因。就算把下边所有的电脑都关机，晚上线路问题照旧出现。。。
最近的日志：
引用内容2010-7-8 07:48 Switch is responding again. Response time is 0 milliseconds
2010-7-8 07:41 Switch has stopped responding (Request Timed Out)
2010-7-8 07:36 Switch is responding again. Response time is 1 milliseconds
2010-7-8 07:29 Switch has stopped responding (Request Timed Out)
2010-7-8 07:26 Switch is responding again. Response time is 0 milliseconds
2010-7-7 17:35 Switch has stopped responding (Request Timed Out)
2010-7-7 17:31 Switch is responding again. Response time is 0 milliseconds
2010-7-7 17:30 Switch rebooted at 2010-7-7 17:28
2010-7-7 17:29 Switch has stopped responding (Request Timed Out)
2010-7-7 17:03 Switch is responding again. Response time is 0 milliseconds
端口配置：
下端Cisco2960（后来换成3560）：
引用内容switch-23net#sho run int fa0/24
Building configuration…
Current configuration : 224 bytes
!
Interface FastEthernet0/24
description up_3550-fa01
switchport trunk encapsulation dot1q
switchport mode trunk
logging event trunk-status
logging event spanning-tree
logging event status
speed 100
duplex full
end
上行设备Cisco3550的端口配置：
引用内容cisco3550#sho run int fa0/1
Building configuration…
Current configuration : 248 bytes
!
Interface FastEthernet0/1
description to_23net
switchport trunk encapsulation dot1q
switchport mode trunk
logging event trunk-status
logging event bundle-status
logging event spanning-tree
logging event status
duplex full
speed 100
end
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洋子[2010-07-12 09:40 PM | 
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]果然是灵异事件。我们公司的DMZ网络依旧4个小时断一个线，挺神奇的。哈哈
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