We saw continuous output drops on a few of our Gigabit interfaces, and can't figure out what are those output drops are and why it is happening. Anyone knows what is the reason of it and is there any way to stop the drop?
Those interfaces are all connecting to the same type of servers for the same application, so I am wondering it is the server interfaces setting, and not our switches.
So you are saying that you have the same type of servers sitting off from those ports? How are those servers reporting the statistics from their NIC? Do you see any errors there?
Output drops, in my understanding, happens when you try to send more data out an interface than can be received by the equipment at the other end.
I see that you have a 1 minute output rate of appx. 216 Mbps. Could it be that your servers simply are not able to handle that amount of data? Remember that even though the NIC is running at 1 Gbps you cannot be sure that the internal bus, memory etc. can handle that load.
I will have to check with the server admin for the server NIC statistics. But in your opinion, it is not that the switch output queue is too small, and the output traffic is too much, that the switch is dropping packets in the output queue becuase of the queue size is set too small?
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