should be okay
-- jason
-----Original Message-----
From: Pang Xiaogang-r63373
Sent: Wednesday, November 17, 2004 10:03 PM
To: Lau Jason-A13484; Baniel Uri-CUB001; 'Suheel Hussain';
[EMAIL PROTECTED]
Subject: RE: [Sip-implementors] UA IP address change after initial dialog
Hi all,
How about this scenario?
UA B2B1 B2B2
| | |
| connection established |
|<------------------>| |
| | |
| failed ..... restore dialog via DB
| |
| |
| Re-INVITE (with new media session address)
|<--------------------------------|
| 200 |
|-------------------------------->|
| ACK |
|<--------------------------------|
| |
| signaling and media |
| connection established |
|<------------------------------->|
David
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> ]
On Behalf Of Lau Jason-A13484
Sent: Thursday, November 18, 2004 3:37 AM
To: Baniel Uri-CUB001; 'Suheel Hussain'; [EMAIL PROTECTED]
Subject: RE: [Sip-implementors] UA IP address change after initial dialog
For call control, if contact has IP, subsequent msgs within dialog will use
that IP. I would think msgs will be dropped if failover occurs to diff IP.
Same with audio stream sent to specific IP/port.
-- Jason
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> ]
On Behalf Of Baniel Uri-CUB001
Sent: Wednesday, November 17, 2004 1:05 PM
To: 'Suheel Hussain'; [EMAIL PROTECTED]
Subject: RE: [Sip-implementors] UA IP address change after initial dialog
UA1 is not supposed to maintain IP address as part of the dialogue. In may
cases it wouldn't even know what is the IP address of the b2bua as the SIP
messages may go through intermediate hops (e.g. proxy). All should be fine as
long as the call-leg (dialog) identifiers are kept the same (call-id, local and
remote tags (in the From and To headers respectively)).
Hope everyone is in agreement w/ me...
-uri
===================================================
Uri Baniel - Distinguished Member of Technical Staff - Motorola
Winphoria division - System Engineering
Tel: (847) 632 4616; Fax: (847) 632 3963;
"Learning that does not daily increase will daily decrease" - EWC
===================================================
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> ]
On Behalf Of Suheel Hussain
Sent: Wednesday, November 17, 2004 12:14 PM
To: [EMAIL PROTECTED]
Subject: [Sip-implementors] UA IP address change after initial dialog
I am developing a high-availability UA system. This
system will have following configuration
UA1 --- b2b Server 1 (1.2.3.4) -----
\ | -- backend
\ --- b2b Server 2 (9.10.11.12) ---- database
(DB)
In a typical scenario, UA1 will establish initial
dialog with b2b1. This b2b1 will save all dialog
information in DB -- includes From, To, Contact and
other headers. (Actually whole Invite message.)
Now when b2b1 fails, b2b2 takes over and DB pushes all
call information to this server. Let us say b2b2 is
able to build dialog with information from DB. My
question is if any message is sent to UA1 in
reconstructed dialog: will UA1 drop the call since
message is coming from a different IP address
(9.10.11.12) than one (1.2.3.4) used in establishing
initial dialog??
Any suggestions on building b2b high-availability
system...
Thanks
-suheel
Suheel Hussain
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