Hi IANA,

I would like to know if IANA has any advice on how much guidance needs to be in 
the document for a registration type that is marked Expert Review. Does IANA 
need all the details, or does it rely on the DE to give its expert opinion?

Thanks.

> On Nov 21, 2025, at 9:22 PM, Ketan Talaulikar <[email protected]> wrote:
> 
> Hi Michael,
> 
> I'll admit that I am now conflicted and don't know which of FCFS and Expert 
> Review is suitable for this registry. But those are the 2 options on the 
> table for the WG to consider.
> 
> 1) FCFS - "handing lollipops" with some perfunctory (non-technical) checks 
> done by IANA
> 2) Expert Review - Very specific DE guidance is required to be capture; IANA 
> will direct the request to the DE(s) who will need to review and evaluate
> 
> Mahesh, I don't know if anyone from the IANA team has been consulted and what 
> their recommendations are. That may be helpful for the WG to consider.
> 
> I'll wait for what comes out of the WG consensus in the document and will 
> update my ballot based on that.
> 
> Thanks,
> Ketan
> 
> 
> On Sat, Nov 22, 2025 at 2:52 AM Michael Richardson <[email protected] 
> <mailto:mcr%[email protected]>> wrote:
>> 
>> Mahesh Jethanandani <[email protected] 
>> <mailto:[email protected]>> wrote:
>>     > See below for the discussion on the second paragraph of Section 3.2.2.
>> 
>>     >> > 4) The DE guidance has the following text but I am not sure that I 
>> understand
>>     >> > what this means. This needs a reference to some relevant 
>> specification that
>>     >> > explains the encoding in question.
>>     >> >
>>     >> > "When the contents of the link type can contain an IPv4 or IPv6 
>> header, then
>>     >> > the octets between the beginning of the link type and the IP header 
>> needs to be
>>     >> > clear."
>>     >>
>>     >> I *think* the idea is that, *if* you can encapsulate IPv4 or IPv6 
>> packet in that link type, the specification should describe everything from 
>> the beginning of the packet to the IP header", i.e. "don't leave anything 
>> out".
>>     >>
>>     >> I'm not sure what the purpose of that is. Michael?
>> 
>>     KT> IOW, it is asking for a specification of that link type's
>>     KT> header/packet format. If so, would it be better to say that directly?
>>     KT> But then, the DE cannot make this determination if a reference is not
>>     KT> provided/available? In summary, please see if the DE guidance can be
>>     KT> more precise.
>> 
>> There is some back and forth by unicast that I won't repeat.
>> Please suggest better wording, but the DE is not going to fix the
>> specification!
>> 
>> This point is raised because it is a place where specifications have
>> sometimes fallen short or been vague.  No specification is required.
>> 
>> For example, there are DLTs that describe USB captures. And we could have
>> new variations.    IP packets *could* be there via PPP over USB Modem, ACM,
>> or Serial port. (That's three different USB profiles, I think)
>> There are also 2-3 different ways to do Ethernet over USB that could contain 
>> IP.
>> But, the DE should *not* insist that the spec says how to find the IP header;
>> as it would be tied up in all the ethernet formats, etc.
>> So the suggested text, "... if you can" would be far too strong advice.
>> The spec could say, "here be ethernet", which would be enough.
>> 
>> --
>> Michael Richardson <[email protected] <mailto:mcr%[email protected]>>  
>>  . o O ( IPv6 IøT consulting )
>>            Sandelman Software Works Inc, Ottawa and Worldwide
>> 
>> 
>> 
>> 


Mahesh Jethanandani
[email protected]






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