[Serusers] Strange ATA-186 register behavior

Thu Nov 6 11:30:09 CET 2003

On Nov 05, 2003 at 19:00, Mike <voipguy at spam.turbolink.net> wrote:
> 
> After playing around with the new firmware (and new SER cvs snapshot
> 0.8.12dev-22-tcp_aliases) I'm seeing some very strange behavior from SER
> (ngrep trace follows):
> 
> 
> U 1.1.19.48:1387 -> 1.1.16.55:5060
>   REGISTER sip:sip.test.net SIP/2.0..Via: SIP/2.0/UDP 1.1.19.48:1388..From: <sip:6526 at sip.test.net;user=phone>;tag=50886574..T
>   o: <sip:6526 at sip.test.net;user=phone>..Call-ID: 4136319346 at 10.118.145.13..CSeq: 160 REGISTER..Contact: <sip:6526 at 1.1.19.48:
>   1388;user=phone;transport=udp>;expires=1800..User-Agent: Cisco ATA 186  v2.16.2 ata18x (030909a)..Content-Length: 0....
> #
> U 1.1.16.55:5060 -> 1.1.19.48:1388 25017 at 0:1480
>   ...l....SIP/2.0 200 OK..Via: SIP/2.0/UDP 1.1.19.48:1388..From: <sip:6526 at s
    ^^^^^^^^
Is there really garbage before SIP or is this a ngrep artifact?
(a tcpdump -s 1514 -w /tmp/dump would help)
Apart from this the reply seems ok. It is fragmented and the whole
 message is huge (25017 at 0:1480).

Maybe the ATA doesn't deal well with packets this size, or a firewall
drops the fragments.

Andrei