Greg Mirsky <[email protected]> writes:
> Thank you for the review and your thoughtful questions. Please find my
> notes below, tagged 'GIM>>'. I attached the new working version (it also
> includes updates that address comments from RtgDir review).

My apologies for being slow to respond.  Though none of my responses
require any revisions.

> I assume that the term "support XYZ" is understood to mean that the
> BIER OAM specification MUST specify particular ways of doing XYZ, ...

OK, I was not concerned about *me* knowing the exact meaning of
"support" but rather that everybody in the WG had the same
understanding of its import.  Though I notice now that I didn't say
that directly.  However, you've made it clear that is the case.

>> [...]  Although I notice that requirements 2,
>> 3, and 6 do not use the word "support"; do they apply to BIER OAM in a
>> different way than the others?

I take it that the answer is "No, requirements 2, 3, and 6 apply in
the same way as the others."

>> Is "unidirectional OAM" a known term of art?  ...
> GIM>> Thank you for this question. In general, some OAM mechanisms and
> protocols are unidirectional, e.g., RFC 4656 A One-way Active Measurement
> Protocol <https://datatracker.ietf.org/doc/html/rfc4656>. Thinking about a
> better term, would "one-way" be clearer? Or, perhaps, replace
> unidirectional with downstream?

I will leave that to the wisdom of the WG.  As long as everybody doing
the work understands what the terminology means, whether it is obvious
to *me* does not matter.

>>    8.   BIER OAM MUST support proactive monitoring of BFER availability
>>         by a BFR in the given BIER domain, e.g., p2mp BFD active tail
>>         support [RFC9780].
>>
>> The phrase "by a BFR" seems ambiguous.  ...
>>
> GIM>> The intention of the requirement is ensuring that any BFR in the BIER
> domain may serve as a BFIR for a multicast distribution tree. Thus, the BFR
> is required to monitor the leaves of the multicast distribution tree, i.e.,
> BFERs. I applied the proposed text to get the following:
> NEW TEXT:
>   8.   BIER OAM MUST support the ability of any BFR in the given BIER
>         domain to proactively monitor BFER availability, e.g., p2mp BFD
>         active tail support [RFC9780].

Ah, yes, that seems to be completely unambiguous.

The remaining queries I made seem to have been resolved in the same
way, with full clarification of the ambiguities I was worried about.

Dale

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