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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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<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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<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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