UDP packet loss
Pavel Urban
pupu at pupu.cz
Thu Jun 8 15:45:11 UTC 2006
Patrick Klos wrote:
> In article <e69ccs$cbm$1 at sf1.isc.org>, Pavel Urban <urbanp at mlp.cz> wrote:
>> Hello,
>>
>> I've tried to find out the cause of some strange resolving problem we
>> are experiencing. From time to time, our server seems to ignore some
>> requests, while others are answered promptly. It seems to me that the
>> problem is UDP packet loss.
>>
>> Udp:
>> 948795842 packets received
>> 149802 packets to unknown port received.
>> 214635022 packet receive errors
>> 1003702082 packets sent
>>
>> I've tried to increase system udp receive buffer 10x and then 100x with
>> no noticable effect. Do I have to change something in Bind, too? Or am I
>> completely wrong?
>
> I'd say your biggest problem is the 214 million packet receive errors!
> Find the source of those errors, and you'll likely take care of your
> problem. Your machine is tossing 1 out of every 4 or 5 packets!
>
I've tried to 'watch' these errors and they seem to be bind-related -
after the service is restarted, these errors stop to occur for some
time. I thought that the cause is small udp receive buffer, but I'm not
a network specialist - do you think it is/may be caused by something else?
Thanks!
--
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Pavel Urban (pavel.urban at imaginet.cz)
IOL system disaster
Internet OnLine, owned by Cesky Telecom, a.s. (www.ct.cz)
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Vegetables should not operate electronic equipment.
Computer Stupidities, http://rinkworks.com/stupid/
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