Hi Eric,

We've posted an update that includes the changes discussed in the thread
below:
https://datatracker.ietf.org/doc/html/draft-ietf-lsr-ospf-bfd-strict-mode-10

Thanks,
Ketan


On Wed, Oct 5, 2022 at 12:37 PM Ketan Talaulikar <[email protected]>
wrote:

> Hi Eric,
>
> Thanks for your quick response and please check inline below with KT2.
>
> On Wed, Oct 5, 2022 at 12:22 PM Eric Vyncke (evyncke) <[email protected]>
> wrote:
>
>> Hello Ketan
>>
>>
>>
>> As usual, your fast reply is always appreciated.
>>
>>
>>
>> See below for EV> (mainly acknowledging your reply)
>>
>>
>>
>> Regards
>>
>>
>>
>> -éric
>>
>>
>>
>> *From: *iesg <[email protected]> on behalf of Ketan Talaulikar <
>> [email protected]>
>> *Date: *Wednesday, 5 October 2022 at 08:21
>> *To: *Eric Vyncke <[email protected]>
>> *Cc: *The IESG <[email protected]>, "
>> [email protected]" <
>> [email protected]>, "[email protected]" <
>> [email protected]>, "[email protected]" <[email protected]>, "Acee Lindem
>> (acee)" <[email protected]>
>> *Subject: *Re: Éric Vyncke's Yes on
>> draft-ietf-lsr-ospf-bfd-strict-mode-09: (with COMMENT)
>>
>>
>>
>> Hi Eric,
>>
>>
>>
>> Thanks for your review and please check inline below for responses.
>>
>>
>>
>> The update discussed below will reflect in the next version of the
>> document.
>>
>>
>>
>>
>>
>> On Wed, Oct 5, 2022 at 11:20 AM Éric Vyncke via Datatracker <
>> [email protected]> wrote:
>>
>> Éric Vyncke has entered the following ballot position for
>> draft-ietf-lsr-ospf-bfd-strict-mode-09: Yes
>>
>> When responding, please keep the subject line intact and reply to all
>> email addresses included in the To and CC lines. (Feel free to cut this
>> introductory paragraph, however.)
>>
>>
>> Please refer to
>> https://www.ietf.org/about/groups/iesg/statements/handling-ballot-positions/
>> for more information about how to handle DISCUSS and COMMENT positions.
>>
>>
>> The document, along with other ballot positions, can be found here:
>> https://datatracker.ietf.org/doc/draft-ietf-lsr-ospf-bfd-strict-mode/
>>
>>
>>
>> ----------------------------------------------------------------------
>> COMMENT:
>> ----------------------------------------------------------------------
>>
>>
>> # Éric Vyncke, INT AD, comments for draft-ietf-lsr-ospf-bfd-strict-mode-09
>> CC @evyncke
>>
>> Thank you for the work put into this document. It is short, clear, and
>> useful
>> (hence my YES).
>>
>> Please find below some non-blocking COMMENT points (but replies would be
>> appreciated even if only for my own education).
>>
>> Special thanks to Acee Lindem for the shepherd's detailed write-up
>> including
>> the WG consensus and the justification of the intended status.
>>
>> I hope that this review helps to improve the document,
>>
>> Regards,
>>
>> -éric
>>
>> ## COMMENTS
>>
>> ### Section 3
>>
>> Suggest to move section 3 (Local Interface IPv4 Address TLV) as a
>> subsection of
>> section 4.1 (OSPFv3 IPv4 Address-Family Specifics) as, at least for me,
>> the
>> reader cannot understand the use of section 3 before reading section 4.1
>>
>>
>>
>> KT> How about we add a forward reference to section 4.1 in section 3? The
>> idea behind the current organization was to specify the protocol encodings
>> up front and then their usage/procedures.
>>
>>
>>
>> EV> I understand the reasoning of the current document structure even if
>> not easy for the reader. Anyway, a forward reference would be a good step
>> forward.
>>
>
> KT2> Ack
>
>
>>
>>
>>
>> As I am not an OSPFv3 expert, the following question is possibly
>> irrelevant,
>> but can the IPv4 address be a link-local (i.e., 169.254/16)?
>>
>>
>>
>> KT> AFAIK such usage is not specified. Perhaps the assumption or
>> motivation being that they were mainly intended for hosts. That said,
>> technically their usage does seem possible to me. Both for OSPFv2 and for
>> OSPFv3.
>>
>>
>>
>> EV> Thanks. I guess that specifying that it must be a unicast address is
>> useless/implicit.
>>
>
> KT2> Yes. It is an interface address.
>
>
>>
>>
>>
>> ### Section 4.1
>>
>> ```
>>    ... In most deployments of
>>    OSPFv3 IPv4 AF, it is required that BFD is used to monitor and verify
>>    IPv4 data plane connectivity between the routers on the link and,
>>    hence, the BFD session is setup using IPv4 neighbor addresses.
>> ```
>>
>> The text is a little unclear whether an IPv6 BFD session is also required.
>>
>>
>>
>> KT> Yes, it is for OSPv3 IPv6 AF instance adjacencies - that is base
>> OSPFv3 protocol interactions with BFD and covered in RFC5882. Here the
>> context is specifically on "In ... OSPFv3 IPv4 AF, ...". Note that there
>> would be separate OSPFv3 protocol instances for IPv4 and IPv6 with the
>> adjacency of each instance monitoring IPv4 and IPv6 BFD connectivity
>> respectively.
>>
>>
>>
>> EV> this was my **guess**, suggest to make it clearer with " ... the IPv4
>> BFD session is setup ..."
>>
>
> KT2> Ack - will incorporate this suggestion.
>
> Thanks,
> Ketan
>
>
>>
>>
>> Thanks,
>>
>> Ketan
>>
>>
>>
>>
>> ## Notes
>>
>> This review is in the ["IETF Comments" Markdown format][ICMF], You can
>> use the
>> [`ietf-comments` tool][ICT] to automatically convert this review into
>> individual GitHub issues.
>>
>> [ICMF]: https://github.com/mnot/ietf-comments/blob/main/format.md
>> [ICT]: https://github.com/mnot/ietf-comments
>>
>>
>>
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