IPv6, multihoming, and customer allocations

Tue Mar 16 16:17:02 UTC 2010

On Mar 16, 2010, at 7:38 AM, Rick Ernst wrote:

> Regurgitating the original e-mail for context and follow-up.
> 
> General responses (some that didn't make it to the list):
>  - "There really is that much space, don't worry about it."
>  - /48s for those that ask for it is fine, ARIN won't ask unless it's a
> bigger assignment
>  - /52 (or /56) on smaller assignments for conservation if it makes you
> feel better
>  - Open question on whether byte/octet-boundary assignment (/56 vs /52) is
> better for some reason
> 
Octet boundary, not really.  Nibble boundary, yes. Both for DNS delegation
convenience and for human factors issues.

> I haven't seen anything on the general feel for prefix filtering.  I've seen
> discussions from /48 down to /54.  Any feel for what the "standard" (widely
> deployed) IPv6 prefix filter size will be?
> 
So far, mostly it's /48 with a few select providers trying to hold the line at /32.

Owen