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Re: [netmod] 6021 ipv4-prefix

Kristian Larsson <kristian@spritelink.net> Thu, 25 April 2019 21:21 UTC

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From: Kristian Larsson <kristian@spritelink.net>
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Subject: Re: [netmod] 6021 ipv4-prefix
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On 2019-04-18 13:12, Juergen Schoenwaelder wrote:
> 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:
>>> +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.

Vice versa, if an implementation does treat 2001:db8::1/64 as a syntax 
error, is that implementation incorrect?

    kll

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