[Serusers] Strange ATA-186 register behavior

[Mike]

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 sip.test.net;user=phone>;tag=50886574..To: <sip:65
  26 at sip.test.net;user=phone>;tag=0596aef19d8edd571cbf9827f60616bb.97c5..Call-ID: 4136319346 at 10.118.145.13..CSeq: 160 REGISTER..Co
  ntact: <sip:6526 at 1.1.19.48:1376;user=phone;transport=udp>;q=0.00;expires=30..Contact: <sip:6526 at 1.1.19.48:1377;user=p
  hone;transport=udp>;q=0.00;expires=56..Contact: <sip:6526 at 1.1.19.48:1378;user=phone;transport=udp>;q=0.00;expires=517..Con
  tact: <sip:6526 at 1.1.19.48:1379;user=phone;transport=udp>;q=0.00;expires=527..Contact: <sip:6526 at 1.1.19.48:1380;user=p
  hone;transport=udp>;q=0.00;expires=652..Contact: <sip:6526 at 1.1.19.48:1381;user=phone;transport=udp>;q=0.00;expires=780..Co
  ntact: <sip:6526 at 1.1.19.48:1382;user=phone;transport=udp>;q=0.00;expires=911..Contact: <sip:6526 at 1.1.19.48:1383;user=
  phone;transport=udp>;q=0.00;expires=1040..Contact: <sip:6526 at 1.1.19.48:1385;user=phone;transport=udp>;q=0.00;expires=1303.
  .Contact: <sip:6526 at 1.1.19.48:1386;user=phone;transport=udp>;q=0.00;expires=1532..Contact: <sip:6526 at 1.1.19.48:1387;u
  ser=phone;transport=udp>;q=0.00;expires=1576..Contact: <sip:6526 at 1.1.19.48:1388;user=phone;transport=udp>;q=0.00;expires=1
  800..Server: Sip EXpress router (0.8.12dev-22-tcp_aliases (i386/linux))..Content-Length: 0..Warning: 392 sip.test.net:5060 "Nois
  y feedback tells:  pid=11260 req_src_ip=1.1.19.48 req_src_port=1387 in_uri=sip


This is repeated over and over and over again.  This seems very bizzare to
me.  ATAs with earlier firmware don't trigger this behavior.  The only
thing that I can see different in the register request is the addition of
the tag in the From: line:

From: <sip:6526 at sip.test.net;user=phone>;tag=50886574

whereas the old ATA registers with:

From: <sip:6526 at sip.test.net;user=phone>

Any clues??  Thanks!!

- Mike