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Cisco Switch Port is down line protocol is down(notconnect)

Unanswered Question
May 15th, 2014
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Hi Everyone,

 

I have a Cisco 2960 switch ( WS-C2960-24TT) and around 10-12 ports are not functioning properly. It shows me like Fa 0/3 is down line protocol is down(notconnected) , even if the port is connected to laptop. If i unplug the cable and plug it to any working port it works. I already did shutdown then no shut but the problem remain the same.

 

Can anyone help me to sort this issue.

 

Thanks.

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syed kazim abbas Thu, 05/15/2014 - 09:13
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wr erase, and check logs care fully, if boot up smoothly then u ports are lose, nothing else

i have same problem before

 

HTH

 

"please don't forget to rate if post helpfull"

glen.grant Thu, 05/15/2014 - 11:59
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  Reboot the switch , it will usually tell you if it sees a problem in POST  .  Do a sh test and see what it says and also check the logs .

Joseph W. Doherty Thu, 05/15/2014 - 09:15
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Could be just broken.  If so, time to RMA.

Naveen Venkateshaiah Thu, 05/15/2014 - 10:16
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  • Cisco Employee,

Check for the speed and duplex setting on the non working ports.

should be a physical layer issue here.

 

Regards,

Naveen

****rate if it is helpful****

 

 

Muhammad Hassan Thu, 05/15/2014 - 10:22
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Naveen,

 

I tried every combination of speed/duplex but it not works. Same cable connected fine on working ports.

Andrew Hrycaj Thu, 05/15/2014 - 10:44
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Sounds to me like you could have bad hardware.  It could be a bad Ethernet controller.  Is it a range of ports or random?  I remember the 3550 48 port switch had 4 Ethernet controller that controlled 12 ports a piece.  Reload the device and see if there are any controller errors that pop up during POST.  

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