[162254] in North American Network Operators' Group
Re: Verizon DSL moving to CGN
daemon@ATHENA.MIT.EDU (Rajiv Asati (rajiva))
Sun Apr 7 21:18:19 2013
From: "Rajiv Asati (rajiva)" <rajiva@cisco.com>
To: Mikael Abrahamsson <swmike@swm.pp.se>
Date: Mon, 8 Apr 2013 01:18:07 +0000
In-Reply-To: <alpine.DEB.2.00.1304070925230.23668@uplift.swm.pp.se>
Cc: nanog list <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
> DS-Lite is also CGN, it just happens to be done over IPv6 access. MAP is =
also CGN.
Thankfully, MAP is not CGN. Correctly stated, unlike DS-Lite, MAP doesn't r=
equire any CGN that causes the SP network to put up with the NAT state. Thi=
s means that all the subsequent issues of CGN/DS-Lite no longer apply.=20
MAP is all about stateless (NAT64 of Encapsulation) and IPv6 enabled access=
. MAP makes much more sense in any SP network having its internet customers=
do IPv4 address sharing and embrace IPv6.
Cheers,
Rajiv
Sent from my Phone
On Apr 7, 2013, at 3:33 AM, "Mikael Abrahamsson" <swmike@swm.pp.se> wrote:
> On Sun, 7 Apr 2013, Fabien Delmotte wrote:
>=20
>> CGN is just a solution to save time, it is not a transition mechanism th=
rough IPv6
>> At the end (IPv6 at home) you will need at list :
>> Dual stack or NAT64/ DNS64
>=20
> CGN doesn't stop anyone deploying dual stack. NAT64/DNS64 is dead in the =
water without other mechanisms (464XLAT or alike).
>=20
> My point is that people seem to scoff at CGN. There is nothing stopping a=
nyone putting in CGN for IPv4 (that has to be done to handle IPv4 address e=
xhaustion), then giving dual stack for end users can be done at any time.
>=20
> Face it, we're running out of IPv4 addresses. For basic Internet subscrip=
tions the IPv4 connectivity is going to be behind CGN. IPv6 is a completely=
different problem that has little bearing on CGN or not for IPv4. DS-Lite =
is also CGN, it just happens to be done over IPv6 access. MAP is also CGN.
>=20
> I'm ok with people complaining about lack of IPv6 deployment, but I don't=
understand people complaining about CGN. What's the alternative?
>=20
> --=20
> Mikael Abrahamsson email: swmike@swm.pp.se
>=20
