[Serusers] Bug or feature?

[Maxim Sobolev]

Folks,

This question isn't directly related to a SER, but does anybody know why 
Cisco IOS inserts several identical `c=<IP>' lines in SDP which it 
generates? No other UA I know about does that. I wonder because it 
creates a problems with SDP rewriting in nathelper module and I need to 
decide whether I have to modify nathelper to cope with that or open a 
Cisco TAC case instead.

Any comments are appreciated!

-Maxim

SIP/2.0 200 OK
Via: SIP/2.0/UDP 67.104.130.102:5061
From: 
<sip:0118000 at 67.104.130.102:5061;user=phone>;tag=bb4b39670c51e5c737c5de99b5450cc5
To: <sip:61412722777 at 64.180.102.72;user=phone>;tag=357A3908-2F6
Date: Tue, 17 Jun 2003 07:35:12 GMT
Call-ID: 2920698556 at 192.168.1.100
Server: Cisco-SIPGateway/IOS-12.x
CSeq: 2 INVITE
Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, COMET, REFER, 
SUBSCRIBE, NOTIFY, INFO
Allow-Events: telephone-event
Contact: <sip:61412722777 at 67.104.130.107:5060>
Content-Type: application/sdp
Content-Length: 285

v=0
o=CiscoSystemsSIP-GW-UserAgent 7069 1539 IN IP4 67.104.130.107
s=SIP Call
c=IN IP4 67.104.130.107
^^^^^^^^^^^^^^^^^^^^^^^
t=0 0
m=audio 19044 RTP/AVP 4 19 101
c=IN IP4 67.104.130.107
^^^^^^^^^^^^^^^^^^^^^^^
a=rtpmap:4 G723/8000
a=rtpmap:19 CN/8000
a=fmtp:4 annexa=no
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15