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]
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
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--
Drew Gibson
Systems Administrator
OANDA Corporation
416-593-6767 x322
www.oanda.com
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