[101344] in North American Network Operators' Group
Re: v6 subnet size for DSL & leased line customers
daemon@ATHENA.MIT.EDU (Joel Jaeggli)
Mon Dec 31 16:22:17 2007
Date: Mon, 31 Dec 2007 13:18:41 -0800
From: Joel Jaeggli <joelja@bogus.com>
To: Mark Smith <nanog@85d5b20a518b8f6864949bd940457dc124746ddc.nosense.org>
CC: Jeroen Massar <jeroen@unfix.org>, surfer@mauigateway.com, nanog@merit.edu
In-Reply-To: <20071231105401.12d7a733.nanog@85d5b20a518b8f6864949bd940457dc124746ddc.nosense.org>
Errors-To: owner-nanog@merit.edu
Mark Smith wrote:
>
> Another idea would be to give each non-/48 customer the
> first /56 out of each /48. If you started out with a /30 or /31 RIR block , by
> the time you run out of /48s, you can either start using up the
> subsequent /56s out of the first /48, as it's likely that the first /56
> customer out of the /48 would have needed the /48 by that time.
As stated, that approach has really negative implications for the number
of routes you carry in your IGP.
> Alternatively you might have become more comfortable with giving each
> customer a /48, and wouldn't require any of them to renumber - they'd
> just have to shorten their prefix length.
>
> Regards,
> Mark.
>
