[SIPForum-discussion] Difference between Update and Re-Invite

[John Berg]

The important difference between an UPDATE and a re-INVITE is that in the case of a re-INVITE it may impact both the session and the dialog parameters.  Conversely, an UPDATE allows session information to be updated without affecting the state of the dialog.  RFC3311 explains the UPDATE method very well.

Regards,
John

From: discussion-bounces at sipforum.org [mailto:discussion-bounces at sipforum.org] On Behalf Of Nitin Kapoor
Sent: Monday, August 09, 2010 2:40 PM
To: Deepak raj Siddharthan
Cc: discussion at sipforum.org
Subject: Re: [SIPForum-discussion] Difference between Update and Re-Invite

Deepak,

Both re-Invite and UPDATE are similar but the actual difference lies where UPDATE is always one way whereas in re-invite the negotiation happens like initial invite request.

In UPDATE, either offer is accepted or ignored but the entity which receives UPDATE can't send it's allowed media parameters in the response, like what happens in 200OK for INVITE or re-INVITE.

Thanks,
Nitin Kapoor
On 9 August 2010 12:07, Deepak raj Siddharthan <deepakraj.siddhu at gmail.com<mailto:deepakraj.siddhu at gmail.com>> wrote:
Hello all,

Can any one tell me the difference betweent the "Update" method and "Re-Invite" ?

Thanks in advance

Best Regards,
Deepak

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