Re: [Last-Call] Artart last call review of draft-ietf-sidrops-rfc6482bis-07

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Hi Job,

On 2 Nov 2023, at 19:03, Job Snijders wrote:

> Dear Jim,
>
> Thank you for taking the time to review this document!
>
> On Mon, Oct 16, 2023 at 10:12:05PM -0700, Jim Fenton via Datatracker wrote:

>> 2. Section 4.3.2 says that ROAIPAddress contains IPAddress elements
>> while (if I'm reading the definition correctly) it contains BIT STRING
>> elements. RFC 6482 defined an IPAddress element as a BIT STRING but
>> that definition was removed; perhaps the text didn't keep up with
>> that.
>
> I think the 'BIT STRING' you are looking for is present via the
> 'ROAIPAddress' -> 'address' definition. Previously the 'BIT STRING' was
> an unconstrained definition, in this -bis document its bounded by the
> maximum possible length which is dependent on whether the contained
> address is IPv4 or IPv6, done like this 'BIT STRING (SIZE(0..len))'.

The size bound on the ROAIPAddress is a good enhancement. But in RFC 6482, there was an element explicitly defined called IPAddress which was defined as a BIT STRING. But in this draft, I find no element named IPAddress, and I’m concerned with the fact that the text in Sec. 4.3.1 refers to IPAddress.
>
>> 3. RFC 4291 may be a normative reference due to the MUST NOT in Section 4.3.1.
>
> I moved the RFC4291 reference from the informative to the normative
> reference section.
>
>> 4. I couldn't understand how to do the comparison in Sections 4.3.3
>> and 4.3.3.1. Specifically, what is the precedence between
>> afi/addr/plen/mlen? It seems like that might be the order, but I don't
>> see it specified anywhere (other than perhaps in the example
>> implementations, which are informative).
>
> I am not 100% sure what exactly you are looking for. I don't think the
> order in which to test the equivalence of the afi/addr/plen/mlen data
> elements matters. Can you please elaborate?

Made up example: Suppose two entries have the same plen and mlen. Entry A has a lower afi and entry B has a lower addr. Which comes first?

-Jim

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