Ah. Perhaps vendors forgot/neglected to respond on the implementation question 
for this particular spec, I know of two implementations.

Jeffrey

-----Original Message-----
From: BESS <[email protected]> On Behalf Of [email protected]
Sent: Wednesday, December 16, 2020 5:39 AM
To: 'Éric Vyncke' <[email protected]>; 'The IESG' <[email protected]>
Cc: [email protected]; [email protected]; 
[email protected]
Subject: Re: [bess] Éric Vyncke's Abstain on 
draft-ietf-bess-mvpn-fast-failover-13: (with COMMENT)

[External Email. Be cautious of content]


Hi Eric,

Speaking as BESS WG chair, you raised a very valid point on the publication of 
documents that have no implementation (or plan of implementation). This is also 
a concern that I have in general, as we cannot really prove that a 
technology/specification is working properly if it hasn't been implemented.
I think the discussion is a bit orthogonal to this particular document.
In the routing area, each WG is free to have its own policy regarding 
implementations. In BESS, the WG decided that there will be an implementation 
poll then if there is no implementation, and if WG is still fine progressing 
the doc without an implementation, the document will continue until 
publication. Good or bad that could be discussed but this is the WG consensus 
(it was there before I took over the chair seat). This policy differs across 
WGs.
I don't think that the date of the doc really matters, even if the doc was more 
recent, nothing says that there will be an implementation in future, so 
situation will be the same. I personally don't like having non implemented 
specs but it's not just up to me and again this goes beyond just this document.

Brgds,

Stephane

-----Original Message-----
From: Éric Vyncke via Datatracker <[email protected]>
Sent: mercredi 16 décembre 2020 11:06
To: The IESG <[email protected]>
Cc: [email protected]; [email protected]; 
[email protected]; Stephane Litkowski <[email protected]>; 
[email protected]
Subject: Éric Vyncke's Abstain on draft-ietf-bess-mvpn-fast-failover-13: (with 
COMMENT)

Éric Vyncke has entered the following ballot position for
draft-ietf-bess-mvpn-fast-failover-13: Abstain

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Please refer to 
https://urldefense.com/v3/__https://www.ietf.org/iesg/statement/discuss-criteria.html__;!!NEt6yMaO-gk!VKBlE-qjDQeeCsz4ekqM-S0M5txGOaciHBeicTqvPGGcOfOv2F_kB0LkcPs169tg$
for more information about IESG DISCUSS and COMMENT positions.


The document, along with other ballot positions, can be found here:
https://urldefense.com/v3/__https://datatracker.ietf.org/doc/draft-ietf-bess-mvpn-fast-failover/__;!!NEt6yMaO-gk!VKBlE-qjDQeeCsz4ekqM-S0M5txGOaciHBeicTqvPGGcOfOv2F_kB0LkcD1j6hff$



----------------------------------------------------------------------
COMMENT:
----------------------------------------------------------------------

Thank you for the work put into this document.

I have balloted ABSTAIN in the sense of "I oppose this document but understand 
that others differ and am not going to stand in the way of the others." because 
of the use outside of a node of the IPv4-mapped IPv6 addresses in section 
3.1.6.1. A reply on this topic will be welcome.

Stéphane in his doc shepherd's write up states that no implementation is known 
for a document born in 2008... Does the IETF really want to have this on the 
proposed standards track ?

Please find below my ABSTAIN point, some non-blocking COMMENT points (but 
replies would be appreciated), and one nits.

I hope that this helps to improve the document,

Regards,

-éric

== ABSTAIN ==
-- Section 3.1.6.1 --
I appreciate that the BFD WG relies on "::ffff:127.0.0.0/104" but those 
IPv4-mapped IPv6 addresses are assumed to never leave a node and should never 
be transmitted over the Internet (see 
https://urldefense.com/v3/__https://tools.ietf.org/html/rfc5156*section-2.2__;Iw!!NEt6yMaO-gk!VKBlE-qjDQeeCsz4ekqM-S0M5txGOaciHBeicTqvPGGcOfOv2F_kB0LkcKQDD6CU$
 ). This is the cause of my ABSTAIN. As the inner packet is sent over a tunnel, 
why not using the a link-local address or the ff02::1 link-local multicast 
group ?

== COMMENTS ==

-- Section 2.3 --
The use of "upstream" and "Upstream" could be confusing... The latter could 
have been "Upstream PE/ABSR" (often used later in the document) or "ingress 
node"

-- Section 3.1.6 --
Could the "BFD Discreminator" attribute be used for other purpose than this 
document? If so, then why not specifying it in *another* document?

Should this document clearly state that it does not define any TLV ?

== NITS ==

As I am probably not the only reader have difficulties to remember RFC contents 
by their number, may I suggest to prefix the RFC numbers with their titles ?
Esp in the introduction ;-)




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