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<p>Indeed, such issues related to UDP fragmentation should not
happen, the packets can be up to 64k, bigger than MTU size. I
think linux had it for more than 20 years and most of routers are
based on it.<br>
</p>
<p>But surprisingly, there are still some routers that cannot cope
with that -- I get hit from time to time (not too often, I have to
say it) with support requests related to this matter and I also
wonder how that is still the case today.</p>
<p>Cheers,<br>
Daniel<br>
</p>
<div class="moz-cite-prefix">On 01.04.19 17:18, Steve Davies wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CABFTEGW+B8SDBZR=ey3iyVUSadjFzWrwNk8-CcgeAOOmwZdMXg@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div dir="ltr">Never quite got this. UDP packets can be up to
64k, right? And fragmentation is a standard IP feature if a
packet is bigger than MTU size.
<div><br>
</div>
<div>Steve</div>
<div><br>
</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Mon, 1 Apr 2019 at 16:43,
Alex Balashov <<a href="mailto:abalashov@evaristesys.com"
moz-do-not-send="true">abalashov@evaristesys.com</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div dir="auto">The customary inter-Kamailio solution is jumbo
frames (if you control network end-to-end) or TCP.<br>
<br>
<div id="gmail-m_2722708156775202843AppleMailSignature"
dir="ltr">—
<div>Sent from mobile, with due apologies for brevity and
errors.</div>
</div>
<div dir="ltr"><br>
On Apr 1, 2019, at 10:33 AM, Igor Olhovskiy <<a
href="mailto:igorolhovskiy@gmail.com" target="_blank"
moz-do-not-send="true">igorolhovskiy@gmail.com</a>>
wrote:<br>
<br>
</div>
<blockquote type="cite">
<div dir="ltr">
<div>Hi!</div>
<br>
<div>Was looking on some way to compress SIP signalling
between internal servers. But found out, there are no
some pre-defined or recommended mechanism of doing
this.</div>
<div>Yes, I found gzcompress module, but it will help
only in case of big body, but not whole message
itself. Like in some cases you can have 4-5 RR
headers, which is already a lot of info.</div>
<br>
<div>What I googled is </div>
<ol>
<li>
<div>SigComp</div>
</li>
<li>
<div>Compact Header form</div>
</li>
</ol>
<div>As I found, SigComp is really not widely-used
method and it support along opensource SIP
servers/PBXes is not documented.</div>
<div>For Compact Header form - is there any way of using
Kamailio to compress message this way?</div>
<div>Maybe also there is a way of having some
intermediate proxy-layer software, that will
gzip/gunzip SIP signalling in realtime?</div>
<br>
<div>All of this actually cause info in SIP/SDP grows
rapidly, unfortunately MTU size is not.</div>
<img class="gmail-m_2722708156775202843mailspring-open"
alt="Sent from Mailspring" style="border: 0px; width:
0px; height: 0px;"
src="https://link.getmailspring.com/open/AFC94AD0-AEE3-4FA1-B652-7AE139FA7504@getmailspring.com?recipient=c3ItdXNlcnNAbGlzdHMua2FtYWlsaW8ub3Jn"
moz-do-not-send="true" width="0" height="0"></div>
</blockquote>
<blockquote type="cite">
<div dir="ltr"><span>_______________________________________________</span><br>
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_______________________________________________<br>
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<pre class="moz-quote-pre" wrap="">_______________________________________________
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</pre>
</blockquote>
<pre class="moz-signature" cols="72">--
Daniel-Constantin Mierla -- <a class="moz-txt-link-abbreviated" href="http://www.asipto.com">www.asipto.com</a>
<a class="moz-txt-link-abbreviated" href="http://www.twitter.com/miconda">www.twitter.com/miconda</a> -- <a class="moz-txt-link-abbreviated" href="http://www.linkedin.com/in/miconda">www.linkedin.com/in/miconda</a>
Kamailio World Conference - May 6-8, 2019 -- <a class="moz-txt-link-abbreviated" href="http://www.kamailioworld.com">www.kamailioworld.com</a></pre>
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