Re: address selection and DHCPv6

[Stig Venaas <stig.venaas at uninett.no>]

Bernie Volz (volz) wrote:
> I would think that how an address is assigned shouldn't enter into this.
> I can't see that it matters.
>
> What really matters is the lifetimes associated with the address. The
> longest lifetime address is probably the best to use since it is the
> most stable. [Ignoring privacy and other related issues.]

That's sort of what I thought at first as well. But if you use remaining
lifetime (and not the initial) you might easily end up in situations
where you fluctuate between several addresses. Not so good.

As an example, imagine two routers regularly sending RAs for one prefix
each, then you might end up always using the prefix you last got an RA
for, possibly changing every few seconds depending on the adv. rate.

Stig

> Perhaps this gets at what you want anyway, since manually assigned
> addresses would presumable have the longest lifetime? 
>
> - Bernie 
>
> -----Original Message-----
> From: Manfredi, Albert E [mailto:albert.e.manfredi at boeing.com] 
> Sent: Thursday, October 26, 2006 3:06 PM
> To: Durand, Alain
> Cc: ipv6 at ietf.org
> Subject: RE: address selection and DHCPv6
>
> Except that from what others have said, that might not be the desired
> goal. Perhaps for privacy or other reasons, a most stable address choice
> might not be optimal.
>
> I originally thought that would be the best choice, but ...
>
> Bert
>
>
>
> > -----Original Message-----
> > From: Durand, Alain [mailto:Alain_Durand at cable.comcast.com] 
> > Sent: Thursday, October 26, 2006 2:00 PM
> > To: Bernie Volz (volz); James Carlson; Vlad Yasevich
> > Cc: ipv6 at ietf.org
> > Subject: RE: address selection and DHCPv6
> >
> > The question is not to get an absolutely stable address,
> > but to make sure that in case multiple addresses are defined,
> > the one with the highest likelyhood of stability is selected.
>
>
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