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<DIV><FONT size=2>but UDP packet is independent of MTU.</FONT></DIV>
<DIV><FONT size=2>even if you put your UDP packet higher than MTU it will be
fragment as MTU size...</FONT></DIV>
<DIV> </DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color: black"><B>From:</B>
<A title=brian@freeswitch.org href="mailto:brian@freeswitch.org">Brian
West</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=freeswitch-users@lists.freeswitch.org
href="mailto:freeswitch-users@lists.freeswitch.org">FreeSWITCH Users Help</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Tuesday, February 01, 2011 10:35
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [Freeswitch-users] minimum
UDP packet size</DIV>
<DIV><BR></DIV>While performance will be better with larger packets you're
failing to realize that 1440 byte RTP packet would be 180ms of audio. We
only support up to 120ms per packet. If you start to exceed the MTU most
consumer routers will not pass any packets on UDP that exceed the MTU so your
testing gains you nothing.
<DIV><BR></DIV>
<DIV>/b</DIV>
<DIV><BR>
<DIV>
<DIV>On Feb 1, 2011, at 9:27 AM, Madovsky wrote:</DIV><BR
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<DIV><FONT size=2>No my question is minimum udp.</FONT></DIV>
<DIV><FONT size=2>usually the max udp packet is around 65000kB,</FONT></DIV>
<DIV><FONT size=2>David was talking about MTU which is different (Max
Transmit Unit</FONT></DIV>
<DIV><FONT size=2>which is usually 1500 over the net, but ins some internal
network (as my cluster)</FONT></DIV>
<DIV><FONT size=2>I use jumbo frames (9000) with 1GB network
cards.</FONT></DIV>
<DIV><FONT size=2>by default linux kernel UDP min packet is set to
4096.</FONT></DIV>
<DIV><FONT size=2>I made some tests, from 1024 to 65000 and the server
behavior looks like more</FONT></DIV>
<DIV><FONT size=2>cool when packet is big, but I'm almost sure that it
creates also more latency in case</FONT></DIV>
<DIV><FONT size=2>of audio data. I'm finally happy to use exactly the same
rate as MTU, performance</FONT></DIV>
<DIV><FONT size=2>seems to be better in
multitask.</FONT></DIV></SPAN></BLOCKQUOTE></DIV><BR></DIV>
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