Re: [asterisk-users] Grandstream RTPkeepalive packetscausing Asteriskwarning

Tue, 31 Jul 2007 13:28:00 -0700 

Thanks Steve,

I'll keep digging,

regards,

Drew


Steve Langstaff wrote:
Sorry Drew - I don't know enough about Asterisk to comment on the effects of this on the RTP stack. 

    *From:* [EMAIL PROTECTED]
    [mailto:[EMAIL PROTECTED] *On Behalf Of
    *Drew Gibson
    *Sent:* 31 July 2007 15:02
    *To:* Asterisk Users Mailing List - Non-Commercial Discussion
    *Subject:* Re: [asterisk-users] Grandstream RTPkeepalive
    packetscausing Asteriskwarning

    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]>
        [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 

        Systems Administrator
        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 <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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