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Re: IPv6 end user addressing
From: Owen DeLong <owen () delong com>
Date: Fri, 5 Aug 2011 10:20:45 -0700

/56 is definitely preferable to /64, but, /48 really is a better choice.

/56 is very limiting for autonomous hierarchical deployments.

It's not about number of subnets. It's about the ability to provide some flexibility
in the breadth and depth of bit fields used for creating hierarchical topologies
automatically.

Owen

On Aug 5, 2011, at 9:17 AM, Brian Mengel wrote:

In reviewing IPv6 end user allocation policies, I can find little
agreement on what prefix length is appropriate for residential end
users.  /64 and /56 seem to be the favorite candidates, with /56 being
slightly preferred.

I am most curious as to why a /60 prefix is not considered when trying
to address this problem.  It provides 16 /64 subnetworks, which seems
like an adequate amount for an end user.

Does anyone have opinions on the BCP for end user addressing in IPv6?

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