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List:       sip-implementors
Subject:    Re: [Sip-implementors] SIP in case of a IP change
From:       Paul Kyzivat <pkyzivat () cisco ! com>
Date:       2006-07-21 13:43:21
Message-ID: 44C0D9F9.9020405 () cisco ! com
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Sachin Srivastava wrote:
> Hi Dale,
> 
> If this is the case with a proxy, how would it declare the new IP
> address?

Generally you are screwed if this happens with a proxy.

If the proxy has a DNS name it can update, then it can do that. In that 
case, as long as it is always referenced by its DNS name then it should 
get worked out. But I think you will have a lot of trouble.

	Paul

> Thanks & Regards,
> Sachin
>  
>  
> 
> -----Original Message-----
> From: sip-implementors-bounces@cs.columbia.edu
> [mailto:sip-implementors-bounces@cs.columbia.edu] On Behalf Of
> Dale.Worley@comcast.net
> Sent: Friday, July 07, 2006 8:15 PM
> To: sip-implementors@cs.columbia.edu
> Subject: Re: [Sip-implementors] SIP in case of a IP change
> 
>    From: samy chbinou <samyc@yahoo.com>
> 
>    I wonder if there is any solution in case the IP
>    number change during a call: 
>    In case the dhcp server gives an other IP while the
>    phone is used, how SIP manage this change? Does SIP
>    permit a phone to have his IP changed during a
>    session?
> 
> Yes -- that's what a "target refresh" accomplishes.  The phone should
> send a re-INVITE using its new address as the Contact.  This will
> cause the agent at the other end of the dialog to update its knowledge
> of the phone's address.
> 
> Dale
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> 
> 
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