[182116] in North American Network Operators' Group
Re: ISP DHCPv6 and /48
daemon@ATHENA.MIT.EDU (Owen DeLong)
Fri Jul 10 12:29:22 2015
X-Original-To: nanog@nanog.org
From: Owen DeLong <owen@delong.com>
In-Reply-To: <CAPkb-7C5LX0QwYpFq5QYyvFaHSbQfvW7tkHsuezvqDtMVYCY_w@mail.gmail.com>
Date: Fri, 10 Jul 2015 09:29:17 -0700
To: Baldur Norddahl <baldur.norddahl@gmail.com>
Cc: "nanog@nanog.org" <nanog@nanog.org>
Errors-To: nanog-bounces@nanog.org
My solution would be to tell them if they want more than 1 IPv4 /32, =
they need a router.
Then route a prefix of appropriate size to their router.
/48 for IPv6 as you are doing, and /n for IPv4.
They want 2 addresses, give them a /30. 3-6, /29; 7-14, /28, etc.
Seems pretty straight forward to me.
Owen
> On Jul 10, 2015, at 02:26 , Baldur Norddahl =
<baldur.norddahl@gmail.com> wrote:
>=20
> Hello,
>=20
> Let me introduce another first world problem. We use DHCPv4 to assign =
each
> user a IPv4 /32 and DHCPv6-PD to assign a IPv6 /128 WAN plus a /48 =
prefix.
> All good.
>=20
> However we are an ISP where the customer chooses his own CPE. We just =
ship
> a modem/mediaconverter/ONU with one ethernet port. The customer is =
expected
> to plug his home router in here.
>=20
> However sometimes we have a customer that wants to buy an extra IPv4
> address. We are happy to sell him that. Now he has two (or more) IPv4
> addresses. Turns out most of these customers are not configuring the =
extra
> IPv4 addresses on a single home router (most CPEs probably can not =
handle
> multiple WAN addresses anyway). Instead these people put in a switch =
and
> then have multiple devices, each with one IPv4.
>=20
> A typical setup is a home router (CPE) plus a server, or they might =
have
> some VPN device forced on them by their employeers or they might =
simply be
> sharing the internet connection with the neighbour (we allow that).
>=20
> However we are forbidden to deliver more than one /48. What to do?
>=20
> Currently we will deliver exactly one /48 to one device and just say =
sorry,
> you will have to figure out how to get IPv6 on your other devices. The
> experience is that 100% of the guys then simply do not have any IPv6 =
on the
> other devices. Figuring out how to route a slice of that /48 is too =
much
> for even most technical minded customers.
>=20
> Would you deliver say /52 prefixes instead but reserve /48, so the =
DHCP
> server has the option to deliver up to 16x /52 per customer?
>=20
> Regards,
>=20
> Baldur
