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<DIV dir=ltr align=left><SPAN class=023521909-31072007><FONT face=Arial
color=#0000ff size=2>Your Grandstream device is using a UDP message of 8 x 0x00
bytes as it's RTP keepalive message.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=023521909-31072007><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=023521909-31072007><FONT face=Arial
color=#0000ff size=2>When Asterisk tries to read this it logs a warning because
it is expecting a valid RTP packet. </FONT></SPAN></DIV><BR>
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style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px solid; MARGIN-RIGHT: 0px">
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<HR tabIndex=-1>
<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> 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></FONT><BR></DIV>
<DIV></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 wrap="">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 wrap="">-----Original Message-----
From: <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>] 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 class=moz-txt-link-abbreviated href="http://www.oanda.com">www.oanda.com</A>
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</PRE></BLOCKQUOTE><PRE wrap=""><!---->
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</PRE></BLOCKQUOTE><BR><BR><PRE class=moz-signature cols="72">--
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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