[Freeswitch-users] minimum UDP packet size

[Madovsky]

:) no 65000 bytes
  ----- Original Message ----- 
  From: David Ponzone 
  To: FreeSWITCH Users Help 
  Sent: Tuesday, February 01, 2011 10:44 AM
  Subject: Re: [Freeswitch-users] minimum UDP packet size


  65MB ?


  David Ponzone  Direction Technique
  email: david.ponzone at ipeva.fr
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  Le 01/02/2011 à 16:27, Madovsky a écrit :


    No my question is minimum udp.
    usually the max udp packet is around 65000kB,
    David was talking about MTU which is different (Max Transmit Unit
    which is usually 1500 over the net, but ins some internal network (as my cluster)
    I use jumbo frames (9000) with 1GB network cards.
    by default linux kernel UDP min packet is set to 4096.
    I made some tests, from 1024 to 65000 and the server behavior looks like more
    cool when packet is big, but I'm almost sure that it creates also more latency in case
    of audio data. I'm finally happy to use exactly the same rate as MTU, performance
    seems to be better in multitask.
      ----- Original Message -----
      From: Erik Dekkers
      To: 'FreeSWITCH Users Help'
      Sent: Tuesday, February 01, 2011 4:28 AM
      Subject: Re: [Freeswitch-users] minimum UDP packet size


      You probably mean a MAXimum size. If you set a minimum size it would always fragment.
      As far as I know it itsn’t possible to set a maximum size of a UDP packet. If the UDP packets are getting too large you really should trim down SIP headers / Remove codecs from the SDP.

      There are some articles on the internet concerning MTU and SIP.

      Erik

      Van: freeswitch-users-bounces at lists.freeswitch.org [mailto:freeswitch-users-bounces at lists.freeswitch.org]Namens Madovsky
      Verzonden: maandag 31 januari 2011 18:29
      Aan: freeswitch-users at lists.freeswitch.org
      Onderwerp: [Freeswitch-users] minimum UDP packet size

      is it useful to set minimum UDP  pakcet to the
      MTU rate like 1500 and avoid any fragmentation ?

      Thanks



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