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<DIV dir=ltr align=left><SPAN class=898082014-31072007><FONT face=Arial
color=#0000ff size=2>Sorry Drew - I don't know enough about Asterisk to comment
on the effects of this on the RTP stack.</FONT></SPAN></DIV><BR>
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<FONT face=Tahoma size=2><B>From:</B> asterisk-users-bounces@lists.digium.com
[mailto:asterisk-users-bounces@lists.digium.com] <B>On Behalf Of </B>Drew
Gibson<BR><B>Sent:</B> 31 July 2007 15:02<BR><B>To:</B> Asterisk Users Mailing
List - Non-Commercial Discussion<BR><B>Subject:</B> Re: [asterisk-users]
Grandstream RTPkeepalive packetscausing Asteriskwarning<BR></FONT><BR></DIV>
<DIV></DIV>Thanks Steve,<BR><BR>am I correct in assuming that Asterisk will
ignore this packet? It will not have any harmful effect if the caller is on
hold for an hour (120 packets)?<BR><BR>In order to feed back to Grandstream,
is there a "correct" format for a keepalive message or is this one
adequate?<BR><BR>regards,<BR><BR>Drew<BR><BR><BR><BR>Steve Langstaff wrote:
<BLOCKQUOTE
cite=mid0D4E483A0E6E0A46861409E5D6C2011C71A677@sea02-mxc01.citel.com
type="cite">
<META http-equiv=Context-Type content="text/html; charset=us-ascii">
<DIV><SPAN>Your Grandstream device is using a UDP message of 8 x 0x00 bytes
as it's RTP keepalive message. </SPAN></DIV>
<DIV><SPAN></SPAN> </DIV>
<DIV><SPAN>When Asterisk tries to read this it logs a warning because it is
expecting a valid RTP packet. </SPAN></DIV><BR>
<BLOCKQUOTE>
<DIV lang=en-us><B>From:</B> <A class=moz-txt-link-abbreviated
href="mailto:asterisk-users-bounces@lists.digium.com">asterisk-users-bounces@lists.digium.com</A>
[<A class=moz-txt-link-freetext
href="mailto:asterisk-users-bounces@lists.digium.com">mailto:asterisk-users-bounces@lists.digium.com</A>]
<B>On Behalf Of </B>Drew Gibson<BR><B>Sent:</B> 30 July 2007
19:55<BR><B>To:</B> Asterisk Users Mailing List - Non-Commercial
Discussion<BR><B>Subject:</B> Re: [asterisk-users] Grandstream RTP
keepalive packetscausing Asteriskwarning<BR><BR></DIV>Hi Steve,<BR><BR>The
following packets match the offending warnings on the * console by time
and number of occurrences and . The SRC and DST ports vary between calls
(naturally) but the rest remains the same. <BR><BR><BR>Frame 3 (60 bytes
on wire, 60 bytes captured)<BR>Ethernet II, Src: Grandstr_0b:a5:3e
(00:0b:82:0b:a5:3e), Dst: Dell_3e:05:ac (00:13:72:3e:05:ac)<BR>Internet
Protocol, Src: 10.1.10.184 (10.1.10.184), Dst: 10.1.10.1
(10.1.10.1)<BR>User Datagram Protocol, Src Port: avt-profile-1 (5004), Dst
Port: 13608 (13608)<BR> Source port: avt-profile-1
(5004)<BR> Destination port: 13608
(13608)<BR> Length: 16<BR>Checksum: 0x8e5f
[correct]<BR>Data (8 bytes)<BR><BR>Data is 8 x null
(00)<BR><BR>regards,<BR><BR>Drew<BR><BR><BR><BR>Steve Langstaff wrote:
<BLOCKQUOTE
cite=mid0D4E483A0E6E0A46861409E5D6C2011C71A1CB@sea02-mxc01.citel.com
type="cite"><PRE>Grab a network trace (with e.g. Wireshark) and look at the payload type
and lengths of the RTP keepalive messages - if you post this information
to the list I'm sure someone will comment on what's happening.
</PRE>
<BLOCKQUOTE type="cite"><PRE>-----Original Message-----
From: <A href="mailto:asterisk-users-bounces@lists.digium.com">asterisk-users-bounces@lists.digium.com</A>
[<A href="mailto:asterisk-users-bounces@lists.digium.com">mailto:asterisk-users-bounces@lists.digium.com</A>] On Behalf Of
Drew Gibson
Sent: 26 July 2007 19:23
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: [asterisk-users] Grandstream RTP keepalive packets
causing Asteriskwarning
Grandstream GXP-2000 with firmware 1.1.4.18 (beta) fixes an
issue where the phone did not send rtp keepalives when on
mute (resulting in disconnect from tech support hold and concalls)
A side effect seems to be that Asterisk pops the following
warning on the console...
Jul 26 14:06:35 WARNING[31654]: rtp.c:463 ast_rtp_read: RTP
Read too short
Grandstream say they are not sure what it is but "it should
not affect anything".
In other words, "Don't worry, be happy!".
Any thoughts/experience on this?
regards,
Drew
--
Drew Gibson
Systems Administrator
OANDA Corporation
416-593-6767 x322
<A href="http://www.oanda.com">www.oanda.com</A>
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</PRE></BLOCKQUOTE><BR><BR><PRE>--
Drew Gibson
Systems Administrator
OANDA Corporation
416-593-6767 x322
<A href="http://www.oanda.com">www.oanda.com</A>
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Drew Gibson
Systems Administrator
OANDA Corporation
416-593-6767 x322
<A class=moz-txt-link-abbreviated href="http://www.oanda.com">www.oanda.com</A>
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