Thanks Steve,
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)?
In order to feed back to Grandstream, is there a "correct" format for a
keepalive message or is this one adequate?
regards,
Drew
Steve Langstaff wrote:
Your Grandstream device is using a UDP message of 8 x 0x00 bytes as
it's RTP keepalive message.
When Asterisk tries to read this it logs a warning because it is
expecting a valid RTP packet.
*From:* [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] *On Behalf Of
*Drew Gibson
*Sent:* 30 July 2007 19:55
*To:* Asterisk Users Mailing List - Non-Commercial Discussion
*Subject:* Re: [asterisk-users] Grandstream RTP keepalive
packetscausing Asteriskwarning
Hi Steve,
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.
Frame 3 (60 bytes on wire, 60 bytes captured)
Ethernet II, Src: Grandstr_0b:a5:3e (00:0b:82:0b:a5:3e), Dst:
Dell_3e:05:ac (00:13:72:3e:05:ac)
Internet Protocol, Src: 10.1.10.184 (10.1.10.184), Dst: 10.1.10.1
(10.1.10.1)
User Datagram Protocol, Src Port: avt-profile-1 (5004), Dst Port:
13608 (13608)
Source port: avt-profile-1 (5004)
Destination port: 13608 (13608)
Length: 16
Checksum: 0x8e5f [correct]
Data (8 bytes)
Data is 8 x null (00)
regards,
Drew
Steve Langstaff wrote:
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.
-----Original Message-----
From: [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>
[mailto:[EMAIL PROTECTED] 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
www.oanda.com <http://www.oanda.com>
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Drew Gibson
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OANDA Corporation
416-593-6767 x322
www.oanda.com <http://www.oanda.com>
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--
Drew Gibson
Systems Administrator
OANDA Corporation
416-593-6767 x322
www.oanda.com
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