[195168] in North American Network Operators' Group
Re: Point 2 point IPs between ASes
daemon@ATHENA.MIT.EDU (William Herrin)
Thu Jun 29 11:45:00 2017
X-Original-To: nanog@nanog.org
X-Really-To: <nanog@nanog.org>
In-Reply-To: <000201d2f093$590d0550$0b270ff0$@gvtc.com>
From: William Herrin <bill@herrin.us>
Date: Thu, 29 Jun 2017 11:44:32 -0400
To: Aaron Gould <aaron1@gvtc.com>
Cc: "nanog@nanog.org" <nanog@nanog.org>
Errors-To: nanog-bounces@nanog.org
On Thu, Jun 29, 2017 at 12:51 AM, Aaron Gould <aaron1@gvtc.com> wrote:
> Thanks Bill, I thought with ipv6 it was a sin to subnet on bit boundaries
> and not on nibble boundaries.
>
Hi Aaron,
Not a sin but you're making more work for yourself if you subnet on
other-than four-bit nibble boundaries. Each character in the hexadecimal
printed version of the IPv6 address is 4 bits, aka 1 nibble. So subnetting
on a nibble boundary means that each character in the address is either
part of the network portion of the address or part of the host portion of
the address, never both.
Conveniently, IPv6 reverse DNS also delegates on the nibble boundary.
Heck, I=E2=80=99m gonna do whatever it takes to NOT subnet on bits with my =
v6
> deployment. Hopefully with v6, gone are the days of binary subnetting ma=
th.
>
Good plan.
-Bill
--=20
William Herrin ................ herrin@dirtside.com bill@herrin.us
Dirtside Systems ......... Web: <http://www.dirtside.com/>
