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

Muhammad Hassan · ‎05-15-2014

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.

syed kazim abbas · ‎05-15-2014

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 · ‎05-15-2014

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 · ‎05-15-2014

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Could be just broken. If so, time to RMA.

Naveen Venkateshaiah · ‎05-15-2014

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 · ‎05-15-2014

Naveen,

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

Andrew Hrycaj · ‎05-15-2014

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.