Input Drops on TenGigabitEthernet Links

Unanswered Question
Jul 28th, 2008

I'm seeing input drops/flushes on a group of 10GB interfaces.

Utilization is around 1%, so utilization is not an issue.

What else should I be looking at to determine the root cause?


I have this problem too.
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lamav Mon, 07/28/2008 - 08:17


Just do the obvious first...

Check the fiber cables -- swap them out if you have to

Swap out the GBICs too

Make sure your speed and duplex settings are correct.

You know...basic layer 1 stuff.



Giuseppe Larosa Mon, 07/28/2008 - 09:07

Hello Joseph,

have a look at the following it describes some bugs that might apply to your case

meaning of input drops:

Input queue - The number of packets in the input queue. Size/max/drops means the current number of frames in the queue/the max number of frames the queue can hold before it must start dropping frames/the actual number of frames dropped because the max queue size was exceeded. The input queue size can be modified by issuing the hold-queue in interface command. Be careful when increasing the size of the queue as this may result in traffic delays because the frames get stuck in the queue for a longer period of time.


Hope to help


jrabener Mon, 07/28/2008 - 10:30

Thanks to all for your observations and suggestions. They will help me formulate a strategy to address this issue.


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