On Thu, Apr 18, 2019 at 12:53:22PM +0200, Mikael Abrahamsson wrote:
> On Thu, 18 Apr 2019, Juergen Schoenwaelder wrote:
> 
> > On Thu, Apr 18, 2019 at 11:43:05AM +0200, Mikael Abrahamsson wrote:
> > 
> > > 2001:db8::/64 and 2001:db8::1/64 are NOT the same if you use them.
> > 
> > Why are they not the same if you define a prefix?
> 
> Because they're not. One of them is a valid prefix, the other one isn't.

Well, this has gone twice through WG last call and twice through IESG
review plus several directorate reviews. In the canonical format, the
non-prefix bits are all zero. I fail to see why this is now a problem.

> > +17.4 is not an integer, so this is an error (not because of the + but
> > because of the . followed by additional digits). +17 is I think a valid
> > integer value but the + will be dropped in the canonical representation.
> 
> Yes, but 2001:db8::1/64 isn't valid prefix (because the host portion of the
> prefix isn't 0) so why should it be "rounded" when 17.4 shouldn't be rounded
> if an integer input is expected?

The non-prefix bits are irrelevant for the prefix and the canonical
format has the non-prefix bits all set to zero. I understand that you
prefer 2001:db8::1/64 to be an error but RFC 6021 and RFC 6991
consider this as valid input that can be safely interpreted to mean
2001:db8::0/64.

/js

-- 
Juergen Schoenwaelder           Jacobs University Bremen gGmbH
Phone: +49 421 200 3587         Campus Ring 1 | 28759 Bremen | Germany
Fax:   +49 421 200 3103         <https://www.jacobs-university.de/>

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