Residential subscribers: numbered or unnumbered?

[Anfinsen, Ragnar]

Hi Philip,

We are doing IPv6 over IPoE in our labs (for now), and we will use DHCPv6 for numbering the CPE. The reason for this is that we support putting the CPE in bridge mode, where the customer can either connect a 3. party router or a computer. When connecting a computer, it needs an IP address and using DHCPv6_IA for this will make the traceability and legal issues easier to handle.

Best Regards
Ragnar


> -----Original Message-----
> From: ipv6-ops-bounces+ragnar.anfinsen=altibox.no at lists.cluenet.de
> [mailto:ipv6-ops-bounces+ragnar.anfinsen=altibox.no at lists.cluenet.de] On
> Behalf Of Philip Matthews
> Sent: 27. mars 2014 02:36
> To: ipv6-ops at lists.cluenet.de
> Subject: Re: Residential subscribers: numbered or unnumbered?
> 
> Many thanks to everyone who replied, even though most people were telling
> me about PPPoE rather than IPoE.
> I am not all that familiar with PPPoE (need to educate myself!!), but I can see
> how many of the issues I mentioned go away with it.
> 
> - Philip
> 
> On 2014-03-25, at 13:29 , Philip Matthews wrote:
> 
> > Folks:
> >
> > Until recently, I was under the impression that most people were using
> numbered v6 links to residential subscribers, allocating the WAN address using
> DHCPv6.  However, recently two people have told me about a number of
> providers that are doing unnumbered instead.
> >
> > So for anyone who has deployed or is planning to deploy residential IPv6, I am
> curious to know which way you are going, and more importantly why you
> selected that approach? My interest is primarily in IPoE, but I don't mind
> hearing about PPPoE as well.
> >
> > The arguments I know or have heard for going numbered are:
> > * Have a WAN address that one can ping remotely to verify connectivity (here
> I am assuming using DHCPv6 to assign a specific IID like ::1)
> > * Want to use TR-069
> >
> > The arguments I can think of for going unnumbered are:
> > * Greater security
> > * Plan to ping the loopback address on the CPE
> >
> >
> > Additional questions for those who have chosen the unnumbered approach or
> are using SLAAC to number the WAN address.
> > * What are you doing wrt having an address to ping to confirm the CPE is
> reachable?
> > * For those doing unnumbered, do all CPEs implement the same algorithm
> for selecting the loopback address according to WAA-7 in RFC 7084? If not, how
> do you handle this? For example, do you only select CPEs that implement the
> same algorithm? Do you just try the likely candidates until one works? Or
> something else?
> >
> >
> > - Philip
>