DHCPv6 RENEW with a new address

[Mudric, Dusan (Dusan)]

On RENEW, it is allowed to remove the old IPv6 address and add a new one:

https://tools.ietf.org/html/rfc3315#section-18.1.3

18.1.3. Creation and Transmission of Renew Messages
    "The server may also add new addresses to the IA. "
    "The server may remove addresses from the IA by setting the preferred and valid lifetimes of those addresses to zero."

When will server do this? After an outage?

Regards,
Dusan.

> Date: Tue, 22 Nov 2016 10:00:03 -0500 (EST)
> From: perl-list <perl-list at network1.net>
> To: Users of ISC DHCP <dhcp-users at lists.isc.org>
> Subject: Re: DHCPv6 RENEW with a new address
> Message-ID:
>	<1482875728.114430.1479826803268.JavaMail.zimbra at network1.net>
> Content-Type: text/plain; charset="utf-8"
>
> I don't think that it would ever happen quite that way. If the renewal failed, at the end of the lease, the client > device should send a solicit message which could result in a new address (or the same address the client had > before). I don't think the client can get a new (different?) address during renewal? 
>
> Anyone else? 
>
> > From: "Mudric, Dusan (Dusan)" <dmudric at avaya.com>
> > To: dhcp-users at lists.isc.org
> > Sent: Tuesday, November 22, 2016 9:07:05 AM
> > Subject: DHCPv6 RENEW with a new address
> >
> > Hi,
>>
> > What would be a real life use case (even better, use cases) for 
> > getting a new address during the IPv6 address renewal?
>>
> >> Thanks,
> > Dusan.