[182351] in North American Network Operators' Group
Re: Dual stack IPv6 for IPv4 depletion
daemon@ATHENA.MIT.EDU (John R. Levine)
Wed Jul 15 12:10:56 2015
X-Original-To: nanog@nanog.org
Date: 15 Jul 2015 12:10:51 -0400
From: "John R. Levine" <johnl@iecc.com>
To: Valdis.Kletnieks@vt.edu
In-Reply-To: <3772.1436975354@turing-police.cc.vt.edu>
Cc: nanog@nanog.org
Errors-To: nanog-bounces@nanog.org
>> It would be nice if it were possible to implement BCP 38 in IPv6, since this
>> is the reason it isn't in IPv4.
>
> There isn't any technical reason that an organization can't fix its edge
> so it doesn't urinate bad IPv6 traffic all over the Internet.
In IPv4 systems, the problem is (so I have been told by some largish ISPs)
that a dual homed customer gets address ranges from ISPs A and B, and
sends traffic with A addresses to the B interface. The ISPs have no
practical way to tell legit dual homed traffic from malicious,
particularly when there is a chain of resellers in between. If the ISP
tells the customer to send the traffic over the right interface, the usual
response is "if you don't want our business, I'm sure we can find another
ISP that does."
Like I said, it would be nice if ISPs could persuade their v6 customers to
get their own PI space early on, because if they don't they'll have
exactly the same problem.
R's,
John
