[193441] in North American Network Operators' Group
Re: Questions on IPv6 deployment
daemon@ATHENA.MIT.EDU (Sander Steffann)
Tue Jan 17 18:06:16 2017
X-Original-To: nanog@nanog.org
From: Sander Steffann <sander@steffann.nl>
In-Reply-To: <CAP-guGU=wpM_1ANAXtsJy9QMB-MUG1b4vxOm1J=mPxMXXTuQzA@mail.gmail.com>
Date: Wed, 18 Jan 2017 00:06:10 +0100
To: William Herrin <bill@herrin.us>
Cc: "nanog@nanog.org" <nanog@nanog.org>
Errors-To: nanog-bounces@nanog.org
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Hi Bill,
> Op 17 jan. 2017, om 22:55 heeft William Herrin <bill@herrin.us> het =
volgende geschreven:
>=20
> I'm always interested in learning something new. Please explain the
> DOS vectors you're referring to and how they're mitigated by
> allocating a /64 to the point to point link.
One thing that comes to mind is that it seems that some routers only =
have limited space in their routing tables for prefixes longer than a =
/64. If you would configure a /127 on the link but push the /64 to the =
routing table then you might both avoid ND Cache exhaustion and avoid =
the limitations on longer-than-/64 prefixes.
I personally prefer to set up my addressing plan that things like this =
are possible even if I don't do it today, but I also understand the =
choices you make. I don't think any of the choices is wrong. It mostly =
depends on expectations, used equipment and personal preference.
And thanks for mentioning "Minimum assignment to a customer: /60". That =
is indeed a very important one!
Cheers,
Sander
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