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From: Henning Rogge via Datatracker <noreply@ietf.org>
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Subject: [RTG-DIR] Rtgdir last call review of draft-ietf-lsr-flex-algo-18
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Reviewer: Henning Rogge
Review result: Ready

Hi,

I have been asked to do a review of draft-ietf-lsr-flex-algo (currently in
draft 18).

First I have to say its very interesting to see that the similarities for the
routing/forwarding backplanes make it possible to have a common RFC that
modifies routing behavior for multiple routing protocols.

My area of knowledge is coming from the MANET area, but I can clearly see that
the mechanisms of this draft are generic enough to apply to most
'multi-topology' capable routing protocols. I wonder if a similar approach
could also be used in MANETs to clearly define sub-topologies that can then be
used to forward trafic along.

I think the draft is well written, most issues I had with the document were
caused by me not knowing the referenced other documents (which would not be a
problem for someone implementing this draft).

The draft uses both OSPF and OSPFv2 and OSPFv3 in the text. I assume that every
text using "OSPF" means "both v2 and v3"?

I have also a few questions about specific chapters...

In chapter 6.1-6.3 (7.1-7.3 for OSPF) you define a subset of "boolean algebra"
among the extended admin groups. I assume that more complex boolean conditions
are not necessary for most deployments (and could be done by defining more EAGs
that represent the specific condition)?

Chapter 7.4 defines that the Flags field has to have a length with a multiple
of 4 octets, which is not the case for the definition in chapter 6.4. Is the
length constraint only necessary in OSPF?

The IANA registries all state "this document" as a reference (and most of them
add a link to a chapter). I think the "this document" could just be omitted to
shorten the reference.

Henning Rogge



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From: Yingzhen Qu <yingzhen.ietf@gmail.com>
Date: Mon, 1 Nov 2021 12:12:29 -0700
Message-ID: <CABY-gOOUQ=A21UFxvueHgJDOYo+o=iBXRPkD0KUKaM3=Y=4UKQ@mail.gmail.com>
To: "Ananya Gopal (ananygop)" <ananygop@cisco.com>
Cc: "rtg-dir@ietf.org" <rtg-dir@ietf.org>,  "draft-ietf-pim-null-register-packing.all@ietf.org" <draft-ietf-pim-null-register-packing.all@ietf.org>,  "pim@ietf.org" <pim@ietf.org>
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Subject: Re: [RTG-DIR] Rtgdir early review of draft-ietf-pim-null-register-packing-10
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Hi Ananya,

Thank you for addressing my comments. Your reply looks good to me, look
forward to the next version.

Thanks,
Yingzhen

On Fri, Oct 29, 2021 at 2:26 PM Ananya Gopal (ananygop) <ananygop@cisco.com=
>
wrote:

> Hi Yingzhen Qu,
>
>
>
> Thank you for the detailed comments.. I have made the changes, but will
> only be able to submit on 2021-11-06 23:59 UTC (IETF-meeting local time).
>
> Please find my comments inline.
>
>
>
> C1:
>
> The IESG state of this draft is =E2=80=9CDead=E2=80=9D. This might be a s=
ystem error, but
>
> should be fixed.
>
> *[AG]* Stig/Mike, could you help with this?
>
> I see https://datatracker.ietf.org/help/state/draft/iesg. I think the
> committee will have to change this.
>
>
>
> C2:
>
> ** Downref: Normative reference to an Informational RFC: RFC 3446
>
> *[AG]:* I understand that RFC 3446 is not a normative reference, rather
> an informative reference. Changed.
>
> C3:
>
> The line numbers are from idnits output.
>
> Question:
>
> 251        *  When a Register-Stop message with the P-bit set is received=
,
>
> 252           the DR MAY send PIM Packed Null-Register messages (Section =
3)
>
> 253           to the RP instead of multiple Register messages with the
> N-bit
>
> 254           set ([[RFC7761]]).
>
>
>
> 256        *  The RP, after receiving a PIM Packed Null-Register message
> MAY
>
> 257           start sending PIM Packed Register-Stop messages (Section 4)
> to
>
> 258           the corresponding DR instead of individual Register-Stop
>
> 259           messages.
>
> Why is "MAY" used here instead of "SHOULD"?
>
>
>
> *[AG]* I have changed it to SHOULD, It is clearly mentioned that both the
> RP and DR support this capability in this scenario.
>
>
>
> C4:
>
> Section 6
>
> 288    the router should not advertise the capability.  However, an
>
> 289    implementation MAY choose to still parse any packed registers if
> they
>
> 290    are received.
>
> For this case, which format of register-stop message the RP should send?
>
>
>
> *[AG]* Once the network manager disables the capability, the RP should
> only send unpacked Register-Stops.
>
>
>
> C5:
>
> Section 8:
>
> For this case, it is suggested that the DR can send an unpacked PIM
>
> Null-Register. How can the DR know that the packed Null-Register message
>
> is not lost?
>
> *[AG] *
>
> If it is lost then we may send unpacked register, we do not expect this t=
o
> be a common occurrence.
>
> I think when we implement it would be preferred to not revert immediately=
,
> since as you say there could be a single drop. The period here is until t=
he
> FHR reverts to unpacked registers. But it is left to the implementation h=
ow
> quickly to revert.
>
>
>
> C6:
>
> Nits:
>
> * Warning from idnits because reference to RFC 8174 is missing.
>
>   =3D=3D The document seems to lack the recommended RFC 2119 boilerplate,=
 even
> if
>
>      it appears to use RFC 2119 keywords -- however, there's a paragraph
> with
>
>      a matching beginning. Boilerplate error?
>
>
>
>      RFC 8174, paragraph 11:
>
>         The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT=
",
>
>         "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY",
>
>         and "OPTIONAL" in this document are to be interpreted as
>
>         described in BCP 14 [RFC2119] [RFC8174] when, and only when, they
>
>         appear in all capitals, as shown here.
>
>
>
>      ... text found in draft:
>
>         The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT=
",
>
>         "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY",
>
>         and "OPTIONAL" in this document are to be interpreted as
>
>         described in BCP 14 [RFC2119] when, and only when, they appear in
>
> ......................................^
>
>         all capitals, as shown here.
>
> *[AG]* Fixed as suggested.
>
>
>
> * There are several places in the draft that an extra "[]" is used. For
> example:
>
> 298      MSDP [[RFC3446]] as well.
>
> s/[[RFC3446]]/[RFC3446]
>
> Please fix them all.
>
> *[AG]* Fixed as suggested.
>
>
>
> 25     This document defines a standard to send multiple multicast source
>
> 26     and group information in a single PIM Null-Register message, in a
>
> 27     packed format.  We will refer to this packed format as the PIM
> Packed
>
> 28     Null-Register format throughout the document.
>
> "in a single PIM Null-Register message, in a packed format." This is a bi=
t
>
> confusing, as it should be a new message called "the PIM Packed
> Null-Register".
>
>
>
> *[AG]* Fixed as suggested.
>
> Changed it to:
>
> This document defines a standard to send multiple multicast source and
> group information in a single PIM Packed Null-Register message.
>
> We will refer to this new packed format as the PIM Packed Null-Register
> format throughout the document.
>
>
>
> 28     Null-Register format throughout the document.  This document also
>
> 29     discusses the interoperability between the PIM routers which do no=
t
>
> 30     understand the packed message format with multiple multicast sourc=
e
>
> 31     and group details.
>
> It should be interoperability between the PIM routers which do not
> understand
>
> the packet message format and routers which do understand it.
>
> *[AG]* Changed as suggested.
>
>
>
> For section 5, case 2 and 3, it should be added that after receiving
>
> DR's PIM Null-Register message, it sends Register-Stop message.
>
> *[AG]* Changed as suggested.
>
>
>
> Thanks,
>
> Ananya
>
> *From: *Yingzhen Qu via Datatracker <noreply@ietf.org>
> *Date: *Monday, October 4, 2021 at 7:46 PM
> *To: *rtg-dir@ietf.org <rtg-dir@ietf.org>
> *Cc: *draft-ietf-pim-null-register-packing.all@ietf.org <
> draft-ietf-pim-null-register-packing.all@ietf.org>, pim@ietf.org <
> pim@ietf.org>
> *Subject: *Rtgdir early review of draft-ietf-pim-null-register-packing-10
>
> Reviewer: Yingzhen Qu
> Review result: Has Nits
>
> Hello
>
> I have been selected to do a routing directorate =E2=80=9Cearly=E2=80=9D =
review of this
> draft.
> https://datatracker.ietf.org/doc/draft-ietf-pim-null-register-packing/
>
> The routing directorate will, on request from the working group chair,
> perform
> an =E2=80=9Cearly=E2=80=9D review of a draft before it is submitted for p=
ublication to the
> IESG. The early review can be performed at any time during the draft=E2=
=80=99s
> lifetime
> as a working group document. The purpose of the early review depends on t=
he
> stage that the document has reached.
>
> As this document has gone through two working group last calls, my focus
> for
> the review was to determine whether the document is ready to be published=
.
> Please consider my comments along with the other working group last call
> comments.
>
> For more information about the Routing Directorate, please see
> =E2=80=8Bhttp://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir
>
> Document: draft-ietf-pim-null-register-packing
> Reviewer: Yingzhen Qu
> Review Date: 10/04/2021
> Intended Status: standards track
>
> Summary:
>
> This document is basically ready for publication, but has nits that shoul=
d
> be
> considered prior to being submitted to the IESG.
>
> Comments:
>
> The IESG state of this draft is =E2=80=9CDead=E2=80=9D. This might be a s=
ystem error, but
> should be fixed.
>
> ** Downref: Normative reference to an Informational RFC: RFC 3446
>
> The line numbers are from idnits output.
> Question:
> 251        *  When a Register-Stop message with the P-bit set is received=
,
> 252           the DR MAY send PIM Packed Null-Register messages (Section =
3)
> 253           to the RP instead of multiple Register messages with the
> N-bit
> 254           set ([[RFC7761]]).
>
> 256        *  The RP, after receiving a PIM Packed Null-Register message
> MAY
> 257           start sending PIM Packed Register-Stop messages (Section 4)
> to
> 258           the corresponding DR instead of individual Register-Stop
> 259           messages.
> Why is "MAY" used here instead of "SHOULD"?
>
> Section 6
> 288    the router should not advertise the capability.  However, an
> 289    implementation MAY choose to still parse any packed registers if
> they
> 290    are received.
> For this case, which format of register-stop message the RP should send?
>
> Section 8:
> For this case, it is suggested that the DR can send an unpacked PIM
> Null-Register. How can the DR know that the packed Null-Register message
> is not lost?
>
> Nits:
>
> * Warning from idnits because reference to RFC 8174 is missing.
>   =3D=3D The document seems to lack the recommended RFC 2119 boilerplate,=
 even
> if
>      it appears to use RFC 2119 keywords -- however, there's a paragraph
> with
>      a matching beginning. Boilerplate error?
>
>      RFC 8174, paragraph 11:
>         The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT=
",
>         "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY",
>         and "OPTIONAL" in this document are to be interpreted as
>         described in BCP 14 [RFC2119] [RFC8174] when, and only when, they
>         appear in all capitals, as shown here.
>
>      ... text found in draft:
>         The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT=
",
>         "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY",
>         and "OPTIONAL" in this document are to be interpreted as
>         described in BCP 14 [RFC2119] when, and only when, they appear in
> ......................................^
>         all capitals, as shown here.
>
> * There are several places in the draft that an extra "[]" is used. For
> example:
> 298      MSDP [[RFC3446]] as well.
> s/[[RFC3446]]/[RFC3446]
> Please fix them all.
>
> 25     This document defines a standard to send multiple multicast source
> 26     and group information in a single PIM Null-Register message, in a
> 27     packed format.  We will refer to this packed format as the PIM
> Packed
> 28     Null-Register format throughout the document.
> "in a single PIM Null-Register message, in a packed format." This is a bi=
t
> confusing, as it should be a new message called "the PIM Packed
> Null-Register".
>
> 28     Null-Register format throughout the document.  This document also
> 29     discusses the interoperability between the PIM routers which do no=
t
> 30     understand the packed message format with multiple multicast sourc=
e
> 31     and group details.
> It should be interoperability between the PIM routers which do not
> understand
> the packet message format and routers which do understand it.
>
> For section 5, case 2 and 3, it should be added that after receiving
> DR's PIM Null-Register message, it sends Register-Stop message.
>
>

--0000000000000712b405cfbef659
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Hi Ananya,<div><br></div><div>Thank you for addressing my =
comments. Your reply looks good to me, look forward to the next version.</d=
iv><div><br></div><div>Thanks,</div><div>Yingzhen</div></div><br><div class=
=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Fri, Oct 29, 2021=
 at 2:26 PM Ananya Gopal (ananygop) &lt;<a href=3D"mailto:ananygop@cisco.co=
m">ananygop@cisco.com</a>&gt; wrote:<br></div><blockquote class=3D"gmail_qu=
ote" style=3D"margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-st=
yle:solid;border-left-color:rgb(204,204,204);padding-left:1ex">





<div lang=3D"EN-US" style=3D"word-wrap:break-word">
<div class=3D"gmail-m_-5231467456685816238WordSection1">
<p class=3D"MsoNormal">Hi Yingzhen Qu, <u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"gmail-m_-5231467456685816238p1"><span style=3D"font-family:Cali=
bri,sans-serif;color:black">Thank you for the detailed comments.. I have ma=
de the changes, but will only be able to submit on
</span><span style=3D"color:black">2021-11-06 23:59 UTC (IETF-meeting local=
 time).<u></u><u></u></span></p>
<p class=3D"gmail-m_-5231467456685816238p1"><span style=3D"color:black">Ple=
ase find my comments inline.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">C1:<u></u><u></u></p>
<p class=3D"MsoNormal">The IESG state of this draft is =E2=80=9CDead=E2=80=
=9D. This might be a system error, but<u></u><u></u></p>
<p class=3D"MsoNormal">should be fixed.<u></u><u></u></p>
<p class=3D"MsoNormal"><b>[AG]</b> Stig/Mike, could you help with this? <u>=
</u><u></u></p>
<p class=3D"MsoNormal">I see <a href=3D"https://datatracker.ietf.org/help/s=
tate/draft/iesg" target=3D"_blank">https://datatracker.ietf.org/help/state/=
draft/iesg</a>. I think the committee will have to change this.
<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">C2:<u></u><u></u></p>
<p class=3D"MsoNormal">** Downref: Normative reference to an Informational =
RFC: RFC 3446<u></u><u></u></p>
<p class=3D"MsoNormal"><b>[AG]:</b> I understand that RFC 3446 is not a nor=
mative reference, rather an informative reference. Changed.<u></u><u></u></=
p>
<p class=3D"MsoNormal"><u></u><u></u></p>
<p class=3D"MsoNormal">C3:<u></u><u></u></p>
<p class=3D"MsoNormal">The line numbers are from idnits output.<u></u><u></=
u></p>
<p class=3D"MsoNormal">Question:<u></u><u></u></p>
<p class=3D"MsoNormal">251=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 *=C2=
=A0 When a Register-Stop message with the P-bit set is received,<u></u><u><=
/u></p>
<p class=3D"MsoNormal">252=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0 the DR MAY send PIM Packed Null-Register messages (Section 3)<=
u></u><u></u></p>
<p class=3D"MsoNormal">253=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0 to the RP instead of multiple Register messages with the N-bit=
<u></u><u></u></p>
<p class=3D"MsoNormal">254=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0 set ([[RFC7761]]).<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">256=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 *=C2=
=A0 The RP, after receiving a PIM Packed Null-Register message MAY<u></u><u=
></u></p>
<p class=3D"MsoNormal">257=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0 start sending PIM Packed Register-Stop messages (Section 4) to=
<u></u><u></u></p>
<p class=3D"MsoNormal">258=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0 the corresponding DR instead of individual Register-Stop<u></u=
><u></u></p>
<p class=3D"MsoNormal">259=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0 messages.<u></u><u></u></p>
<p class=3D"MsoNormal">Why is &quot;MAY&quot; used here instead of &quot;SH=
OULD&quot;?<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal"><b>[AG]</b> I have changed it to SHOULD, It is clear=
ly mentioned that both the RP and DR support this capability in this scenar=
io.<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">C4: <u></u><u></u></p>
<p class=3D"MsoNormal">Section 6<u></u><u></u></p>
<p class=3D"MsoNormal">288=C2=A0=C2=A0=C2=A0 the router should not advertis=
e the capability.=C2=A0 However, an<u></u><u></u></p>
<p class=3D"MsoNormal">289 =C2=A0=C2=A0=C2=A0implementation MAY choose to s=
till parse any packed registers if they<u></u><u></u></p>
<p class=3D"MsoNormal">290=C2=A0=C2=A0=C2=A0 are received.<u></u><u></u></p=
>
<p class=3D"MsoNormal">For this case, which format of register-stop message=
 the RP should send?<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal"><b>[AG]</b> Once the network manager disables the ca=
pability, the RP should only send unpacked Register-Stops.<u></u><u></u></p=
>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">C5:<u></u><u></u></p>
<p class=3D"MsoNormal">Section 8:<u></u><u></u></p>
<p class=3D"MsoNormal">For this case, it is suggested that the DR can send =
an unpacked PIM<u></u><u></u></p>
<p class=3D"MsoNormal">Null-Register. How can the DR know that the packed N=
ull-Register message<u></u><u></u></p>
<p class=3D"MsoNormal">is not lost?<u></u><u></u></p>
<p class=3D"MsoNormal"><b>[AG] <u></u><u></u></b></p>
<p class=3D"MsoNormal">If it is lost then we may send unpacked register, we=
 do not expect this to be a common occurrence.<u></u><u></u></p>
<p class=3D"MsoNormal">I think when we implement it would be preferred to n=
ot revert immediately, since as you say there could be a single drop. The p=
eriod here is until the FHR reverts to unpacked registers. But it is left t=
o the implementation how quickly to
 revert.<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">C6:<u></u><u></u></p>
<p class=3D"MsoNormal">Nits:<u></u><u></u></p>
<p class=3D"MsoNormal">* Warning from idnits because reference to RFC 8174 =
is missing.<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0 =3D=3D The document seems to lack the recomme=
nded RFC 2119 boilerplate, even if<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0=C2=A0=C2=A0=C2=A0 it appears to use RFC 2119 =
keywords -- however, there&#39;s a paragraph with<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0=C2=A0=C2=A0=C2=A0 a matching beginning. Boile=
rplate error?<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">=C2=A0=C2=A0=C2=A0=C2=A0 RFC 8174, paragraph 11:<u><=
/u><u></u></p>
<p class=3D"MsoNormal">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 The key w=
ords &quot;MUST&quot;, &quot;MUST NOT&quot;, &quot;REQUIRED&quot;, &quot;SH=
ALL&quot;, &quot;SHALL NOT&quot;,<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 &quot;SHO=
ULD&quot;, &quot;SHOULD NOT&quot;, &quot;RECOMMENDED&quot;, &quot;NOT RECOM=
MENDED&quot;, &quot;MAY&quot;,<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 and &quot=
;OPTIONAL&quot; in this document are to be interpreted as<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 described=
 in BCP 14 [RFC2119] [RFC8174] when, and only when, they<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 appear in=
 all capitals, as shown here.<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">=C2=A0=C2=A0=C2=A0=C2=A0 ... text found in draft:<u>=
</u><u></u></p>
<p class=3D"MsoNormal">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =C2=A0The key w=
ords &quot;MUST&quot;, &quot;MUST NOT&quot;, &quot;REQUIRED&quot;, &quot;SH=
ALL&quot;, &quot;SHALL NOT&quot;,<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 &quot;SHO=
ULD&quot;, &quot;SHOULD NOT&quot;, &quot;RECOMMENDED&quot;, &quot;NOT RECOM=
MENDED&quot;, &quot;MAY&quot;,<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 and &quot=
;OPTIONAL&quot; in this document are to be interpreted as<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 described=
 in BCP 14 [RFC2119] when, and only when, they appear in<u></u><u></u></p>
<p class=3D"MsoNormal">......................................^<u></u><u></u=
></p>
<p class=3D"MsoNormal">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 all capit=
als, as shown here.<u></u><u></u></p>
<p class=3D"MsoNormal"><b>[AG]</b> Fixed as suggested.<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">* There are several places in the draft that an extr=
a &quot;[]&quot; is used. For example:<u></u><u></u></p>
<p class=3D"MsoNormal">298=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 MSDP [[RFC3446]] a=
s well.<u></u><u></u></p>
<p class=3D"MsoNormal">s/[[RFC3446]]/[RFC3446]<u></u><u></u></p>
<p class=3D"MsoNormal">Please fix them all.<u></u><u></u></p>
<p class=3D"MsoNormal"><b>[AG]</b> Fixed as suggested.<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">25=C2=A0=C2=A0=C2=A0=C2=A0 This document defines a s=
tandard to send multiple multicast source<u></u><u></u></p>
<p class=3D"MsoNormal">26=C2=A0=C2=A0=C2=A0=C2=A0 and group information in =
a single PIM Null-Register message, in a<u></u><u></u></p>
<p class=3D"MsoNormal">27=C2=A0=C2=A0=C2=A0=C2=A0 packed format.=C2=A0 We w=
ill refer to this packed format as the PIM Packed<u></u><u></u></p>
<p class=3D"MsoNormal">28=C2=A0=C2=A0=C2=A0=C2=A0 Null-Register format thro=
ughout the document.<u></u><u></u></p>
<p class=3D"MsoNormal">&quot;in a single PIM Null-Register message, in a pa=
cked format.&quot; This is a bit<u></u><u></u></p>
<p class=3D"MsoNormal">confusing, as it should be a new message called &quo=
t;the PIM Packed Null-Register&quot;.<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal"><b>[AG]</b> Fixed as suggested.<u></u><u></u></p>
<p class=3D"MsoNormal">Changed it to:<u></u><u></u></p>
<p class=3D"MsoNormal">This document defines a standard to send multiple mu=
lticast source and group information in a single PIM Packed Null-Register m=
essage.
<u></u><u></u></p>
<p class=3D"MsoNormal">We will refer to this new packed format as the PIM P=
acked Null-Register format throughout the document.<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">28=C2=A0=C2=A0=C2=A0=C2=A0 Null-Register format thro=
ughout the document.=C2=A0 This document also<u></u><u></u></p>
<p class=3D"MsoNormal">29=C2=A0=C2=A0=C2=A0=C2=A0 discusses the interoperab=
ility between the PIM routers which do not<u></u><u></u></p>
<p class=3D"MsoNormal">30=C2=A0=C2=A0=C2=A0=C2=A0 understand the packed mes=
sage format with multiple multicast source<u></u><u></u></p>
<p class=3D"MsoNormal">31=C2=A0=C2=A0=C2=A0=C2=A0 and group details.<u></u>=
<u></u></p>
<p class=3D"MsoNormal">It should be interoperability between the PIM router=
s which do not understand<u></u><u></u></p>
<p class=3D"MsoNormal">the packet message format and routers which do under=
stand it.<u></u><u></u></p>
<p class=3D"MsoNormal"><b>[AG]</b> Changed as suggested.<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">For section 5, case 2 and 3, it should be added that=
 after receiving<u></u><u></u></p>
<p class=3D"MsoNormal">DR&#39;s PIM Null-Register message, it sends Registe=
r-Stop message.<u></u><u></u></p>
<p class=3D"MsoNormal"><b>[AG]</b> Changed as suggested.<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">Thanks, <u></u><u></u></p>
<p class=3D"MsoNormal">Ananya<u></u><u></u></p>
<div style=3D"border-style:solid none none;border-top-width:1pt;border-top-=
color:rgb(181,196,223);padding:3pt 0in 0in">
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt"><b><span style=3D"font-=
size:12pt;color:black">From:
</span></b><span style=3D"font-size:12pt;color:black">Yingzhen Qu via Datat=
racker &lt;<a href=3D"mailto:noreply@ietf.org" target=3D"_blank">noreply@ie=
tf.org</a>&gt;<br>
<b>Date: </b>Monday, October 4, 2021 at 7:46 PM<br>
<b>To: </b><a href=3D"mailto:rtg-dir@ietf.org" target=3D"_blank">rtg-dir@ie=
tf.org</a> &lt;<a href=3D"mailto:rtg-dir@ietf.org" target=3D"_blank">rtg-di=
r@ietf.org</a>&gt;<br>
<b>Cc: </b><a href=3D"mailto:draft-ietf-pim-null-register-packing.all@ietf.=
org" target=3D"_blank">draft-ietf-pim-null-register-packing.all@ietf.org</a=
> &lt;<a href=3D"mailto:draft-ietf-pim-null-register-packing.all@ietf.org" =
target=3D"_blank">draft-ietf-pim-null-register-packing.all@ietf.org</a>&gt;=
, <a href=3D"mailto:pim@ietf.org" target=3D"_blank">pim@ietf.org</a> &lt;<a=
 href=3D"mailto:pim@ietf.org" target=3D"_blank">pim@ietf.org</a>&gt;<br>
<b>Subject: </b>Rtgdir early review of draft-ietf-pim-null-register-packing=
-10<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt">Reviewer: Yingzhen Qu<b=
r>
Review result: Has Nits<br>
<br>
Hello<br>
<br>
I have been selected to do a routing directorate =E2=80=9Cearly=E2=80=9D re=
view of this draft.<br>
<a href=3D"https://datatracker.ietf.org/doc/draft-ietf-pim-null-register-pa=
cking/" target=3D"_blank">https://datatracker.ietf.org/doc/draft-ietf-pim-n=
ull-register-packing/</a><br>
<br>
The routing directorate will, on request from the working group chair, perf=
orm<br>
an =E2=80=9Cearly=E2=80=9D review of a draft before it is submitted for pub=
lication to the<br>
IESG. The early review can be performed at any time during the draft=E2=80=
=99s lifetime<br>
as a working group document. The purpose of the early review depends on the=
<br>
stage that the document has reached.<br>
<br>
As this document has gone through two working group last calls, my focus fo=
r<br>
the review was to determine whether the document is ready to be published.<=
br>
Please consider my comments along with the other working group last call<br=
>
comments.<br>
<br>
For more information about the Routing Directorate, please see<br>
=E2=80=8B<a href=3D"http://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir" t=
arget=3D"_blank">http://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir</a><b=
r>
<br>
Document: draft-ietf-pim-null-register-packing<br>
Reviewer: Yingzhen Qu<br>
Review Date: 10/04/2021<br>
Intended Status: standards track<br>
<br>
Summary:<br>
<br>
This document is basically ready for publication, but has nits that should =
be<br>
considered prior to being submitted to the IESG.<br>
<br>
Comments:<br>
<br>
The IESG state of this draft is =E2=80=9CDead=E2=80=9D. This might be a sys=
tem error, but<br>
should be fixed.<br>
<br>
** Downref: Normative reference to an Informational RFC: RFC 3446<br>
<br>
The line numbers are from idnits output.<br>
Question:<br>
251=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 *=C2=A0 When a Register-Stop =
message with the P-bit set is received,<br>
252=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 the DR MAY =
send PIM Packed Null-Register messages (Section 3)<br>
253=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 to the RP i=
nstead of multiple Register messages with the N-bit<br>
254=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 set ([[RFC7=
761]]).<br>
<br>
256=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 *=C2=A0 The RP, after receivi=
ng a PIM Packed Null-Register message MAY<br>
257=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 start sendi=
ng PIM Packed Register-Stop messages (Section 4) to<br>
258=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 the corresp=
onding DR instead of individual Register-Stop<br>
259=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 messages.<b=
r>
Why is &quot;MAY&quot; used here instead of &quot;SHOULD&quot;?<br>
<br>
Section 6<br>
288=C2=A0=C2=A0=C2=A0 the router should not advertise the capability.=C2=A0=
 However, an<br>
289=C2=A0=C2=A0=C2=A0 implementation MAY choose to still parse any packed r=
egisters if they<br>
290=C2=A0=C2=A0=C2=A0 are received.<br>
For this case, which format of register-stop message the RP should send?<br=
>
<br>
Section 8:<br>
For this case, it is suggested that the DR can send an unpacked PIM<br>
Null-Register. How can the DR know that the packed Null-Register message<br=
>
is not lost?<br>
<br>
Nits:<br>
<br>
* Warning from idnits because reference to RFC 8174 is missing.<br>
=C2=A0 =3D=3D The document seems to lack the recommended RFC 2119 boilerpla=
te, even if<br>
=C2=A0=C2=A0=C2=A0=C2=A0 it appears to use RFC 2119 keywords -- however, th=
ere&#39;s a paragraph with<br>
=C2=A0=C2=A0=C2=A0=C2=A0 a matching beginning. Boilerplate error?<br>
<br>
=C2=A0=C2=A0=C2=A0=C2=A0 RFC 8174, paragraph 11:<br>
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 The key words &quot;MUST&quot;, =
&quot;MUST NOT&quot;, &quot;REQUIRED&quot;, &quot;SHALL&quot;, &quot;SHALL =
NOT&quot;,<br>
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 &quot;SHOULD&quot;, &quot;SHOULD=
 NOT&quot;, &quot;RECOMMENDED&quot;, &quot;NOT RECOMMENDED&quot;, &quot;MAY=
&quot;,<br>
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 and &quot;OPTIONAL&quot; in this=
 document are to be interpreted as<br>
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 described in BCP 14 [RFC2119] [R=
FC8174] when, and only when, they<br>
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 appear in all capitals, as shown=
 here.<br>
<br>
=C2=A0=C2=A0=C2=A0=C2=A0 ... text found in draft:<br>
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 The key words &quot;MUST&quot;, =
&quot;MUST NOT&quot;, &quot;REQUIRED&quot;, &quot;SHALL&quot;, &quot;SHALL =
NOT&quot;,<br>
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 &quot;SHOULD&quot;, &quot;SHOULD=
 NOT&quot;, &quot;RECOMMENDED&quot;, &quot;NOT RECOMMENDED&quot;, &quot;MAY=
&quot;,<br>
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 and &quot;OPTIONAL&quot; in this=
 document are to be interpreted as<br>
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 described in BCP 14 [RFC2119] wh=
en, and only when, they appear in<br>
......................................^<br>
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 all capitals, as shown here.<br>
<br>
* There are several places in the draft that an extra &quot;[]&quot; is use=
d. For example:<br>
298=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 MSDP [[RFC3446]] as well.<br>
s/[[RFC3446]]/[RFC3446]<br>
Please fix them all.<br>
<br>
25=C2=A0=C2=A0=C2=A0=C2=A0 This document defines a standard to send multipl=
e multicast source<br>
26=C2=A0=C2=A0=C2=A0=C2=A0 and group information in a single PIM Null-Regis=
ter message, in a<br>
27=C2=A0=C2=A0=C2=A0=C2=A0 packed format.=C2=A0 We will refer to this packe=
d format as the PIM Packed<br>
28=C2=A0=C2=A0=C2=A0=C2=A0 Null-Register format throughout the document.<br=
>
&quot;in a single PIM Null-Register message, in a packed format.&quot; This=
 is a bit<br>
confusing, as it should be a new message called &quot;the PIM Packed Null-R=
egister&quot;.<br>
<br>
28=C2=A0=C2=A0=C2=A0=C2=A0 Null-Register format throughout the document.=C2=
=A0 This document also<br>
29=C2=A0=C2=A0=C2=A0=C2=A0 discusses the interoperability between the PIM r=
outers which do not<br>
30=C2=A0=C2=A0=C2=A0=C2=A0 understand the packed message format with multip=
le multicast source<br>
31=C2=A0=C2=A0=C2=A0=C2=A0 and group details.<br>
It should be interoperability between the PIM routers which do not understa=
nd<br>
the packet message format and routers which do understand it.<br>
<br>
For section 5, case 2 and 3, it should be added that after receiving<br>
DR&#39;s PIM Null-Register message, it sends Register-Stop message.<br>
<br>
<u></u><u></u></p>
</div>
</div>
</div>

</blockquote></div>

--0000000000000712b405cfbef659--


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From: Peter Psenak <ppsenak@cisco.com>
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Subject: Re: [RTG-DIR] Rtgdir last call review of draft-ietf-lsr-flex-algo-18
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Hi Henning,

thanks for your review, please see some responses inline (##PP):


On 01/11/2021 11:18, Henning Rogge via Datatracker wrote:
> Reviewer: Henning Rogge
> Review result: Ready
> 
> Hi,
> 
> I have been asked to do a review of draft-ietf-lsr-flex-algo (currently in
> draft 18).
> 
> First I have to say its very interesting to see that the similarities for the
> routing/forwarding backplanes make it possible to have a common RFC that
> modifies routing behavior for multiple routing protocols.
> 
> My area of knowledge is coming from the MANET area, but I can clearly see that
> the mechanisms of this draft are generic enough to apply to most
> 'multi-topology' capable routing protocols. I wonder if a similar approach
> could also be used in MANETs to clearly define sub-topologies that can then be
> used to forward trafic along.
> 
> I think the draft is well written, most issues I had with the document were
> caused by me not knowing the referenced other documents (which would not be a
> problem for someone implementing this draft).
> 
> The draft uses both OSPF and OSPFv2 and OSPFv3 in the text. I assume that every
> text using "OSPF" means "both v2 and v3"?

##PP
yes, that is indeed the wording that we used in many past documents.


> 
> I have also a few questions about specific chapters...
> 
> In chapter 6.1-6.3 (7.1-7.3 for OSPF) you define a subset of "boolean algebra"
> among the extended admin groups. I assume that more complex boolean conditions
> are not necessary for most deployments (and could be done by defining more EAGs
> that represent the specific condition)?

##PP
the include/exclude rules that we defined have been used in traditional 
RSVP-TE for a long time. They have proved to be sufficient. We can 
always add more if needed in the future.

> 
> Chapter 7.4 defines that the Flags field has to have a length with a multiple
> of 4 octets, which is not the case for the definition in chapter 6.4. Is the
> length constraint only necessary in OSPF?

##PP
yes, OSPF TLVs are always 4 bytes aligned, which is not the case for 
ISIS TLVs.

> 
> The IANA registries all state "this document" as a reference (and most of them
> add a link to a chapter). I think the "this document" could just be omitted to
> shorten the reference.

sure, will remove "this document" with the next update.

thanks,
Peter

> 
> Henning Rogge
> 
> 
> 
> 


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From: Henning Rogge <hrogge@gmail.com>
Date: Tue, 2 Nov 2021 14:57:10 +0100
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To: Peter Psenak <ppsenak@cisco.com>
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On Tue, Nov 2, 2021 at 12:07 PM Peter Psenak <ppsenak@cisco.com> wrote:
>
> Hi Henning,
>
> > In chapter 6.1-6.3 (7.1-7.3 for OSPF) you define a subset of "boolean algebra"
> > among the extended admin groups. I assume that more complex boolean conditions
> > are not necessary for most deployments (and could be done by defining more EAGs
> > that represent the specific condition)?
>
> ##PP
> the include/exclude rules that we defined have been used in traditional
> RSVP-TE for a long time. They have proved to be sufficient. We can
> always add more if needed in the future.

I wonder if it can make sense to allow multiple include/exclude-All
TLVs and define the "ANY logic" based on the fact that it's enough
that one sub-TLV "ALL" condition is met.

This might allow for a more flexible system, but I am not sure it's
worth the complexity in this case.

Henning Rogge


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To: Henning Rogge <hrogge@gmail.com>
Cc: rtg-dir@ietf.org, draft-ietf-lsr-flex-algo.all@ietf.org, last-call@ietf.org, lsr@ietf.org
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From: Peter Psenak <ppsenak@cisco.com>
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Subject: Re: [RTG-DIR] Rtgdir last call review of draft-ietf-lsr-flex-algo-18
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Henning,

On 02/11/2021 14:57, Henning Rogge wrote:
> On Tue, Nov 2, 2021 at 12:07 PM Peter Psenak <ppsenak@cisco.com> wrote:
>>
>> Hi Henning,
>>
>>> In chapter 6.1-6.3 (7.1-7.3 for OSPF) you define a subset of "boolean algebra"
>>> among the extended admin groups. I assume that more complex boolean conditions
>>> are not necessary for most deployments (and could be done by defining more EAGs
>>> that represent the specific condition)?
>>
>> ##PP
>> the include/exclude rules that we defined have been used in traditional
>> RSVP-TE for a long time. They have proved to be sufficient. We can
>> always add more if needed in the future.
> 
> I wonder if it can make sense to allow multiple include/exclude-All
> TLVs and define the "ANY logic" based on the fact that it's enough
> that one sub-TLV "ALL" condition is met.
> 
> This might allow for a more flexible system, but I am not sure it's
> worth the complexity in this case.

multiple include/exclude TLVs can be specified in the FAD. In such case, 
constraints in all of these TLVs must be met during the flex-algo 
calculation. So it's a logical AND between these TLVs. What you suggest 
is to allow OR logic between TLVs. I don't see the need for that as you 
can perform both AND and OR operation with the individual affinities - 
include/exclude ANY is the logical OR operation, include ALL is the 
logical AND operation.

I believe what we have is sufficient for now. If needed we can extend in 
the future.

thanks,
Peter

> 
> Henning Rogge
> 
> 


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From: Henning Rogge <hrogge@gmail.com>
Date: Tue, 2 Nov 2021 16:09:09 +0100
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To: Peter Psenak <ppsenak@cisco.com>
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Subject: Re: [RTG-DIR] Rtgdir last call review of draft-ietf-lsr-flex-algo-18
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> multiple include/exclude TLVs can be specified in the FAD. In such case,
> constraints in all of these TLVs must be met during the flex-algo
> calculation. So it's a logical AND between these TLVs. What you suggest
> is to allow OR logic between TLVs. I don't see the need for that as you
> can perform both AND and OR operation with the individual affinities -
> include/exclude ANY is the logical OR operation, include ALL is the
> logical AND operation.
>
> I believe what we have is sufficient for now. If needed we can extend in
> the future.

Thats okay for me, thank you for the additional explanation.

Henning Rogge


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From: "Shah, Himanshu" <hshah@ciena.com>
To: "rtg-dir@ietf.org" <rtg-dir@ietf.org>, "last-call@ietf.org" <last-call@ietf.org>, "draft-ietf-opsawg-l2nm.all@ietf.org" <draft-ietf-opsawg-l2nm.all@ietf.org>
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Thread-Topic: rtgdir Last Call Review of draft-ietf-opsawg-l2nm-10
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Date: Thu, 11 Nov 2021 23:32:38 +0000
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From: "Joe Clarke (jclarke)" <jclarke@cisco.com>
To: "Shah, Himanshu" <hshah@ciena.com>, "rtg-dir@ietf.org" <rtg-dir@ietf.org>,  "last-call@ietf.org" <last-call@ietf.org>, "draft-ietf-opsawg-l2nm.all@ietf.org" <draft-ietf-opsawg-l2nm.all@ietf.org>
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Thread-Topic: rtgdir Last Call Review of draft-ietf-opsawg-l2nm-10
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Date: Sat, 13 Nov 2021 17:21:16 +0000
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To: "Shah, Himanshu" <hshah=40ciena.com@dmarc.ietf.org>, "rtg-dir@ietf.org" <rtg-dir@ietf.org>, "last-call@ietf.org" <last-call@ietf.org>, "draft-ietf-opsawg-l2nm.all@ietf.org" <draft-ietf-opsawg-l2nm.all@ietf.org>
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Subject: Re: [RTG-DIR] rtgdir Last Call Review of draft-ietf-opsawg-l2nm-10
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From: Dhruv Dhody <dhruv.ietf@gmail.com>
Date: Fri, 19 Nov 2021 18:54:51 +0530
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Subject: [RTG-DIR] RtgDir Last Call review: draft-ietf-opsawg-ntf-10
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Hello,

I have been selected as the Routing Directorate reviewer for this draft.
The Routing Directorate seeks to review all routing or routing-related
drafts as they pass through IETF last call and IESG review, and sometimes
on special request. The purpose of the review is to provide assistance to
the Routing ADs. For more information about the Routing Directorate, please
see http://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir

Although these comments are primarily for the use of the Routing ADs, it
would be helpful if you could consider them along with any other IETF Last
Call comments that you receive, and strive to resolve them through
discussion or by updating the draft.

Document: draft-ietf-opsawg-ntf-10
Reviewer: Dhruv Dhody
Review Date: 2021-11-19
IETF LC End Date: over
Intended Status: Informational

Summary:
Choose from this list=E2=80=A6

   - I have some minor concerns about this document that I think should be
   resolved before publication.

Comments:

   - I find the document to be useful. It is well structured and easy to
   read. Since the aim of the document is to clarify the taxonomy and
   framework, I hope to see more drafts to refer to it when describing netw=
ork
   telemetry. I have a few suggestions of things that are missing, some
   queries and nits that are easy to resolve, and hopefully improve the
   document further.

Minor Issues:

   - Well almost Major :)
      - Something that I find missing in the document is that the network
      controller could be a valuable source of network telemetry as well.
      Consider a PCE, the controller could be a source of network-wide
data, such
      as the association between network paths, cumulative network metrics,
      global network utilization, etc. The document is currently very
      network-device-specific (as a data source). My suggestion would be to
      handle the centralized controller either as a separate section or par=
t of
      the control plane and management plane telemetry.
      - Something else that I find missing is the multi-domain aspects. You
      could mark it as out of scope or better yet do talk about it how ther=
e
      could possibly be a hierarchy and recursive nature in your framework =
to
      handle multi-domain. Currently, it is mentioned in passing while
describing
      data fusion in section 3.4.
   - Query
      - Section 4.1
         - In figure 2, why MIB is mentioned in the management plane only,
         why not control plane when various control plane protocols have MI=
Bs?
         Similarly, there are forwarding statistics MIB that might work in =
the
         forwarding plane? Also, add SNMP and ASN.1(?) in the table
corresponding to
         MIB.
         - What is a =E2=80=98mirror=E2=80=99? Maybe expand it or put a * a=
nd expand it at
         the bottom
         - All external data coming from gRPC only?
      - Others
      - Section 6
         - The Independent management network is mentioned only in passing.
         Shouldn=E2=80=99t there be a much stronger recommendation for this=
 instead?

Nits:

   - From IDNits

  =3D=3D Outdated reference: draft-ietf-grow-bmp-adj-rib-out has been publi=
shed
     as RFC 8671

  =3D=3D Outdated reference: draft-ietf-ippm-multipoint-alt-mark has been
     published as RFC 8889

  =3D=3D Outdated reference: A later version (-11) exists of
     draft-song-ippm-postcard-based-telemetry-10


   - Section 2
      - Add reference for
         - GPB - https://developers.google.com/protocol-buffers
         - IOAM - draft-ietf-ippm-ioam-data
         - NetFlow - reference is incorrect, it should be RFC 3954
         - SNMP - for the sake of covering all versions, we should mention
         v3 as well - RFC 3414
      - Section 3.3
      - Add reference for
         - Syslog - RFC 5424
         - sFlow - RFC 3176
      - Expand PSAMP - Packet Sampling
   - Section 4.1
      - The list of 6 angles in the text and the 1st column in the table do
      not match.
      - Expand ASICs - Application-Specific Integrated Circuits
   - Section 4.1.1
      - The use of the term =E2=80=9Cserver=E2=80=9D can be confusing here.=
 Would you
      consider using =E2=80=9Cdata source=E2=80=9D?
   - Section 4.1.2
      - I am unaware of the term =E2=80=9Cvideo fluency=E2=80=9D. Is it a t=
erm of art that
      I am unaware of?
      - Add reference to Y.1731 - =E2=80=9CITU-T, =E2=80=9COAM Functions an=
d Mechanisms for
      Ethernet based networks=E2=80=9D, ITU-T Y.1731, 2006.=E2=80=9D
   - Section A.1.2
      - gNMI reference is marked as [I-D.openconfig-rtgwg-gnmi-spec]
      whereas, in the main body, it is [gnmi] =E2=80=9CgNMI - gRPC Network =
Management
      Interface=E2=80=9D,
      https://github.com/openconfig/reference/tree/master/rpc/gnmi. Any
      reason for different references?
      - same for gRPC!
   - Section A.3.6
      - Expand L2VPN, NVO3, BIER, SFC, DETNET
      - Is there anything about SR and Multicast worth adding to the list?

Thanks!
Dhruv

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<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:trebuche=
t ms,sans-serif;font-size:small;color:#073763"><div id=3D"gmail-:2232" clas=
s=3D"gmail-Ar gmail-Au gmail-Ao"><div id=3D"gmail-:h4y0" class=3D"gmail-Am =
gmail-Al editable gmail-LW-avf gmail-tS-tW gmail-tS-tY" aria-label=3D"Messa=
ge Body" role=3D"textbox" aria-multiline=3D"true" tabindex=3D"1" style=3D"d=
irection:ltr;min-height:226px"><div class=3D"gmail_default"><div class=3D"g=
mail-gs" style=3D"margin:0px;padding:0px 0px 20px;width:673.449px;color:rgb=
(34,34,34);font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif;font-s=
ize:medium"><div class=3D"gmail-"><div id=3D"gmail-:o2kj" class=3D"gmail-ii=
 gmail-gt" style=3D"font-size:0.875rem;direction:ltr;margin:8px 0px 0px;pad=
ding:0px"><div id=3D"gmail-:o2ki" class=3D"gmail-a3s gmail-aiL" style=3D"ov=
erflow:hidden;font-variant-numeric:normal;font-variant-east-asian:normal;fo=
nt-stretch:normal;font-size:small;line-height:1.5;font-family:Arial,Helveti=
ca,sans-serif"><div dir=3D"ltr"><div class=3D"gmail_default" style=3D"color=
:rgb(7,55,99)"><p style=3D"box-sizing:border-box;margin:0px 0px 16px;color:=
rgb(51,51,51);letter-spacing:0.35px"><font face=3D"trebuchet ms, sans-serif=
">Hello,</font></p><p style=3D"box-sizing:border-box;margin:0px 0px 16px;co=
lor:rgb(51,51,51);letter-spacing:0.35px"><font face=3D"trebuchet ms, sans-s=
erif">I have been selected as the Routing Directorate reviewer for this dra=
ft. The Routing Directorate seeks to review all routing or routing-related =
drafts as they pass through IETF last call and IESG review, and sometimes o=
n special request. The purpose of the review is to provide assistance to th=
e Routing ADs. For more information about the Routing Directorate, please s=
ee=C2=A0<a href=3D"http://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir" re=
l=3D"noopener" target=3D"_blank" style=3D"color:rgb(51,122,183);box-sizing:=
border-box;background-color:transparent;text-decoration-line:none">http://t=
rac.tools.ietf.org/area/rtg/trac/wiki/RtgDir</a></font></p><p style=3D"box-=
sizing:border-box;margin:0px 0px 16px;color:rgb(51,51,51);letter-spacing:0.=
35px"><font face=3D"trebuchet ms, sans-serif">Although these comments are p=
rimarily for the use of the Routing ADs, it would be helpful if you could c=
onsider them along with any other IETF Last Call comments that you receive,=
 and strive to resolve them through discussion or by updating the draft.</f=
ont></p><p style=3D"box-sizing:border-box;margin:0px 0px 16px;color:rgb(51,=
51,51);letter-spacing:0.35px"><font face=3D"trebuchet ms, sans-serif">Docum=
ent: draft-ietf-opsawg-ntf-10<br style=3D"box-sizing:border-box">Reviewer: =
Dhruv Dhody<br style=3D"box-sizing:border-box">Review Date: 2021-11-19<br s=
tyle=3D"box-sizing:border-box">IETF LC End Date: over<br style=3D"box-sizin=
g:border-box">Intended Status: Informational</font></p><p style=3D"box-sizi=
ng:border-box;margin:0px 0px 16px;color:rgb(51,51,51);letter-spacing:0.35px=
"><font face=3D"trebuchet ms, sans-serif"><span style=3D"box-sizing:border-=
box;font-weight:700">Summary:</span><br style=3D"box-sizing:border-box">Cho=
ose from this list=E2=80=A6</font></p><ul style=3D"box-sizing:border-box;ma=
rgin-top:0px;margin-bottom:16px;padding-left:2em;color:rgb(51,51,51);letter=
-spacing:0.35px"><li style=3D"margin-left:15px;box-sizing:border-box"><font=
 face=3D"trebuchet ms, sans-serif">I have some minor concerns about this do=
cument that I think should be resolved before publication.</font></li></ul>=
<p style=3D"box-sizing:border-box;margin:0px 0px 16px;color:rgb(51,51,51);l=
etter-spacing:0.35px"><span style=3D"box-sizing:border-box;font-weight:700"=
><font face=3D"trebuchet ms, sans-serif">Comments:</font></span></p><ul sty=
le=3D"box-sizing:border-box;margin-top:0px;margin-bottom:16px;padding-left:=
2em;color:rgb(51,51,51);letter-spacing:0.35px"><li style=3D"margin-left:15p=
x;box-sizing:border-box"><font face=3D"trebuchet ms, sans-serif">I find the=
 document to be useful. It is well structured and easy to read. Since the a=
im of the document is to clarify the taxonomy and framework, I hope to see =
more drafts to refer to it when describing network telemetry. I have a few =
suggestions of things that are missing, some queries and nits that are easy=
 to resolve, and hopefully improve the document further.</font></li></ul><p=
 style=3D"box-sizing:border-box;margin:0px 0px 16px;color:rgb(51,51,51);let=
ter-spacing:0.35px"><span style=3D"box-sizing:border-box;font-weight:700"><=
font face=3D"trebuchet ms, sans-serif">Minor Issues:</font></span></p><ul s=
tyle=3D"box-sizing:border-box;margin-top:0px;margin-bottom:16px;padding-lef=
t:2em;color:rgb(51,51,51);letter-spacing:0.35px"><li style=3D"margin-left:1=
5px;box-sizing:border-box"><font face=3D"trebuchet ms, sans-serif">Well alm=
ost Major :)</font><ul style=3D"box-sizing:border-box;margin-top:0px;margin=
-bottom:0px;padding-left:2em"><li style=3D"margin-left:15px;box-sizing:bord=
er-box"><font face=3D"trebuchet ms, sans-serif">Something that I find missi=
ng in the document is that the network controller could be a valuable sourc=
e of network telemetry as well. Consider a PCE, the=C2=A0controller could b=
e a source of network-wide data, such as the association between network pa=
ths, cumulative network metrics, global network utilization, etc. The docum=
ent is currently very network-device-specific (as a data source). My sugges=
tion would be to handle the centralized controller either as a separate sec=
tion or part of the control plane and management plane telemetry.</font></l=
i><li style=3D"margin-left:15px;box-sizing:border-box;margin-top:0.25em"><f=
ont face=3D"trebuchet ms, sans-serif">Something else that I find missing is=
 the multi-domain aspects. You could mark it as out of scope or better yet =
do talk about it how there could possibly be a hierarchy and recursive natu=
re in your framework to handle multi-domain. Currently, it is mentioned in =
passing while describing data fusion in section 3.4.</font></li></ul></li><=
li style=3D"margin-left:15px;box-sizing:border-box;margin-top:0.25em"><font=
 face=3D"trebuchet ms, sans-serif">Query</font><ul style=3D"box-sizing:bord=
er-box;margin-top:0px;margin-bottom:0px;padding-left:2em"><li style=3D"marg=
in-left:15px;box-sizing:border-box"><font face=3D"trebuchet ms, sans-serif"=
>Section 4.1</font><ul style=3D"box-sizing:border-box;margin-top:0px;margin=
-bottom:0px;padding-left:2em"><li style=3D"margin-left:15px;box-sizing:bord=
er-box"><font face=3D"trebuchet ms, sans-serif">In figure 2, why MIB is men=
tioned in the management plane only, why not control plane when various con=
trol plane protocols have MIBs? Similarly, there are forwarding statistics =
MIB that might work in the forwarding plane? Also, add SNMP and ASN.1(?) in=
 the table corresponding to MIB.</font></li><li style=3D"margin-left:15px;b=
ox-sizing:border-box;margin-top:0.25em"><font face=3D"trebuchet ms, sans-se=
rif">What is=C2=A0a =E2=80=98mirror=E2=80=99? Maybe expand it or put a * an=
d expand it at the bottom</font></li><li style=3D"margin-left:15px;box-sizi=
ng:border-box;margin-top:0.25em"><font face=3D"trebuchet ms, sans-serif">Al=
l external data coming from gRPC only?</font></li></ul></li></ul></li><li s=
tyle=3D"margin-left:15px;box-sizing:border-box;margin-top:0.25em"><font fac=
e=3D"trebuchet ms, sans-serif">Others</font><ul style=3D"box-sizing:border-=
box;margin-top:0px;margin-bottom:0px;padding-left:2em"><li style=3D"margin-=
left:15px;box-sizing:border-box"><font face=3D"trebuchet ms, sans-serif">Se=
ction 6</font><ul style=3D"box-sizing:border-box;margin-top:0px;margin-bott=
om:0px;padding-left:2em"><li style=3D"margin-left:15px;box-sizing:border-bo=
x"><font face=3D"trebuchet ms, sans-serif">The Independent management netwo=
rk is mentioned only in passing. Shouldn=E2=80=99t there be a much stronger=
 recommendation for this instead?</font></li></ul></li></ul></li></ul><p st=
yle=3D"box-sizing:border-box;margin:0px 0px 16px;color:rgb(51,51,51);letter=
-spacing:0.35px"><span style=3D"box-sizing:border-box;font-weight:700"><fon=
t face=3D"trebuchet ms, sans-serif">Nits:</font></span></p><ul style=3D"box=
-sizing:border-box;margin-top:0px;margin-bottom:16px;padding-left:2em;color=
:rgb(51,51,51);letter-spacing:0.35px"><li style=3D"margin-left:15px;box-siz=
ing:border-box"><font face=3D"trebuchet ms, sans-serif">From IDNits</font><=
/li></ul><pre style=3D"white-space:pre-wrap;box-sizing:border-box;overflow:=
auto;padding:16px;margin-top:0px;margin-bottom:16px;line-height:1.45;color:=
rgb(51,51,51);word-break:break-all;background-color:rgb(247,247,247);border=
-radius:3px;letter-spacing:0.35px;border:inherit"><code style=3D"box-sizing=
:border-box;padding:0px;background:transparent;border-radius:3px;margin:0px=
;word-break:normal;border:0px;display:inline;overflow:visible;line-height:i=
nherit;color:inherit"><font face=3D"trebuchet ms, sans-serif">  =3D=3D Outd=
ated reference: draft-ietf-grow-bmp-adj-rib-out has been published
     as RFC 8671

  =3D=3D Outdated reference: draft-ietf-ippm-multipoint-alt-mark has been
     published as RFC 8889

  =3D=3D Outdated reference: A later version (-11) exists of
     draft-song-ippm-postcard-based-telemetry-10
</font></code></pre><ul style=3D"box-sizing:border-box;margin-top:0px;margi=
n-bottom:16px;padding-left:2em;color:rgb(51,51,51);letter-spacing:0.35px"><=
li style=3D"margin-left:15px;box-sizing:border-box"><font face=3D"trebuchet=
 ms, sans-serif">Section 2</font><ul style=3D"box-sizing:border-box;margin-=
top:0px;margin-bottom:0px;padding-left:2em"><li style=3D"margin-left:15px;b=
ox-sizing:border-box"><font face=3D"trebuchet ms, sans-serif">Add reference=
 for</font><ul style=3D"box-sizing:border-box;margin-top:0px;margin-bottom:=
0px;padding-left:2em"><li style=3D"margin-left:15px;box-sizing:border-box">=
<font face=3D"trebuchet ms, sans-serif">GPB -=C2=A0<a href=3D"https://devel=
opers.google.com/protocol-buffers" rel=3D"noopener" target=3D"_blank" style=
=3D"color:rgb(51,122,183);box-sizing:border-box;background-color:transparen=
t;text-decoration-line:none">https://developers.google.com/protocol-buffers=
</a></font></li><li style=3D"margin-left:15px;box-sizing:border-box;margin-=
top:0.25em"><font face=3D"trebuchet ms, sans-serif">IOAM - draft-ietf-ippm-=
ioam-data</font></li><li style=3D"margin-left:15px;box-sizing:border-box;ma=
rgin-top:0.25em"><font face=3D"trebuchet ms, sans-serif">NetFlow - referenc=
e is incorrect, it should be RFC 3954</font></li><li style=3D"margin-left:1=
5px;box-sizing:border-box;margin-top:0.25em"><font face=3D"trebuchet ms, sa=
ns-serif">SNMP - for the sake of covering all versions, we should mention v=
3 as well - RFC 3414</font></li></ul></li></ul></li><li style=3D"margin-lef=
t:15px;box-sizing:border-box;margin-top:0.25em"><font face=3D"trebuchet ms,=
 sans-serif">Section 3.3</font><ul style=3D"box-sizing:border-box;margin-to=
p:0px;margin-bottom:0px;padding-left:2em"><li style=3D"margin-left:15px;box=
-sizing:border-box"><font face=3D"trebuchet ms, sans-serif">Add reference f=
or</font><ul style=3D"box-sizing:border-box;margin-top:0px;margin-bottom:0p=
x;padding-left:2em"><li style=3D"margin-left:15px;box-sizing:border-box"><f=
ont face=3D"trebuchet ms, sans-serif">Syslog - RFC 5424</font></li><li styl=
e=3D"margin-left:15px;box-sizing:border-box;margin-top:0.25em"><font face=
=3D"trebuchet ms, sans-serif">sFlow - RFC 3176</font></li></ul></li><li sty=
le=3D"margin-left:15px;box-sizing:border-box;margin-top:0.25em"><font face=
=3D"trebuchet ms, sans-serif">Expand PSAMP - Packet Sampling</font></li></u=
l></li><li style=3D"margin-left:15px;box-sizing:border-box;margin-top:0.25e=
m"><font face=3D"trebuchet ms, sans-serif">Section 4.1</font><ul style=3D"b=
ox-sizing:border-box;margin-top:0px;margin-bottom:0px;padding-left:2em"><li=
 style=3D"margin-left:15px;box-sizing:border-box"><font face=3D"trebuchet m=
s, sans-serif">The list of 6 angles in the text and the 1st column in the t=
able do not match.</font></li><li style=3D"margin-left:15px;box-sizing:bord=
er-box;margin-top:0.25em"><font face=3D"trebuchet ms, sans-serif">Expand AS=
ICs - Application-Specific Integrated Circuits</font></li></ul></li><li sty=
le=3D"margin-left:15px;box-sizing:border-box;margin-top:0.25em"><font face=
=3D"trebuchet ms, sans-serif">Section 4.1.1</font><ul style=3D"box-sizing:b=
order-box;margin-top:0px;margin-bottom:0px;padding-left:2em"><li style=3D"m=
argin-left:15px;box-sizing:border-box"><font face=3D"trebuchet ms, sans-ser=
if">The use of the term =E2=80=9Cserver=E2=80=9D can be confusing here. Wou=
ld you consider using =E2=80=9Cdata source=E2=80=9D?</font></li></ul></li><=
li style=3D"margin-left:15px;box-sizing:border-box;margin-top:0.25em"><font=
 face=3D"trebuchet ms, sans-serif">Section 4.1.2</font><ul style=3D"box-siz=
ing:border-box;margin-top:0px;margin-bottom:0px;padding-left:2em"><li style=
=3D"margin-left:15px;box-sizing:border-box"><font face=3D"trebuchet ms, san=
s-serif">I am unaware of the term =E2=80=9Cvideo fluency=E2=80=9D. Is it a =
term of art that I am unaware of?</font></li><li style=3D"margin-left:15px;=
box-sizing:border-box;margin-top:0.25em"><font face=3D"trebuchet ms, sans-s=
erif">Add reference to Y.1731 - =E2=80=9CITU-T, =E2=80=9COAM Functions and =
Mechanisms for Ethernet based networks=E2=80=9D, ITU-T Y.1731, 2006.=E2=80=
=9D</font></li></ul></li><li style=3D"margin-left:15px;box-sizing:border-bo=
x;margin-top:0.25em"><font face=3D"trebuchet ms, sans-serif">Section A.1.2<=
/font><ul style=3D"box-sizing:border-box;margin-top:0px;margin-bottom:0px;p=
adding-left:2em"><li style=3D"margin-left:15px;box-sizing:border-box"><font=
 face=3D"trebuchet ms, sans-serif">gNMI reference is marked as [I-D.opencon=
fig-rtgwg-gnmi-spec] whereas, in the main body, it is [gnmi] =E2=80=9CgNMI =
- gRPC Network Management Interface=E2=80=9D,=C2=A0<a href=3D"https://githu=
b.com/openconfig/reference/tree/master/rpc/gnmi" rel=3D"noopener" target=3D=
"_blank" style=3D"color:rgb(51,122,183);box-sizing:border-box;background-co=
lor:transparent;text-decoration-line:none">https://github.com/openconfig/re=
ference/tree/master/rpc/gnmi</a>. Any reason for different references?</fon=
t></li><li style=3D"margin-left:15px;box-sizing:border-box;margin-top:0.25e=
m"><font face=3D"trebuchet ms, sans-serif">same for gRPC!</font></li></ul><=
/li><li style=3D"margin-left:15px;box-sizing:border-box;margin-top:0.25em">=
<font face=3D"trebuchet ms, sans-serif">Section A.3.6</font><ul style=3D"bo=
x-sizing:border-box;margin-top:0px;margin-bottom:0px;padding-left:2em"><li =
style=3D"margin-left:15px;box-sizing:border-box"><font face=3D"trebuchet ms=
, sans-serif">Expand L2VPN, NVO3, BIER, SFC, DETNET</font></li><li style=3D=
"margin-left:15px;box-sizing:border-box;margin-top:0.25em"><font face=3D"tr=
ebuchet ms, sans-serif">Is there anything about SR and Multicast worth addi=
ng to the list?</font></li></ul></li></ul><p style=3D"box-sizing:border-box=
;margin:0px;color:rgb(51,51,51);letter-spacing:0.35px"><font face=3D"trebuc=
het ms, sans-serif">Thanks!<font color=3D"#888888"><br style=3D"box-sizing:=
border-box">Dhruv</font></font></p></div></div><div class=3D"gmail-yj6qo"><=
/div><div class=3D"gmail-adL"></div></div></div><div class=3D"gmail-hi" sty=
le=3D"border-bottom-left-radius:1px;border-bottom-right-radius:1px;padding:=
0px;width:auto;background:rgb(242,242,242);margin:0px"></div></div></div><p=
 style=3D"font-family:Arial,Helvetica,sans-serif;box-sizing:border-box;marg=
in:0px 0px 16px;color:rgb(51,51,51);letter-spacing:0.35px"><br class=3D"gma=
il-Apple-interchange-newline"></p></div></div></div></div></div>

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From: Haoyu Song <haoyu.song@futurewei.com>
To: Dhruv Dhody <dhruv.ietf@gmail.com>, "rtg-dir@ietf.org" <rtg-dir@ietf.org>,  "last-call@ietf.org" <last-call@ietf.org>, "draft-ietf-opsawg-ntf.all@ietf.org" <draft-ietf-opsawg-ntf.all@ietf.org>
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Thread-Topic: RtgDir Last Call review: draft-ietf-opsawg-ntf-10
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Archived-At: <https://mailarchive.ietf.org/arch/msg/rtg-dir/MnNucPEAm7CgDm3qqz2uZJUF5Go>
Subject: Re: [RTG-DIR] RtgDir Last Call review: draft-ietf-opsawg-ntf-10
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--_000_BY3PR13MB47873A05F48931312939E3139A9C9BY3PR13MB4787namp_
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Hi Dhruv,

Thank you very much for the review! Please see inline for our response and =
proposed modifications. We'll update the document once we hear back from yo=
u. Thanks!

Best regards,
Haoyu

From: Dhruv Dhody <dhruv.ietf@gmail.com>
Sent: Friday, November 19, 2021 5:25 AM
To: rtg-dir@ietf.org; last-call@ietf.org; draft-ietf-opsawg-ntf.all@ietf.or=
g
Cc: rtgdir-chairs@ietf.org; rtgdir-ads@ietf.org; opsawg <opsawg@ietf.org>
Subject: RtgDir Last Call review: draft-ietf-opsawg-ntf-10


Hello,

I have been selected as the Routing Directorate reviewer for this draft. Th=
e Routing Directorate seeks to review all routing or routing-related drafts=
 as they pass through IETF last call and IESG review, and sometimes on spec=
ial request. The purpose of the review is to provide assistance to the Rout=
ing ADs. For more information about the Routing Directorate, please see htt=
p://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir<https://nam11.safelinks.p=
rotection.outlook.com/?url=3Dhttp%3A%2F%2Ftrac.tools.ietf.org%2Farea%2Frtg%=
2Ftrac%2Fwiki%2FRtgDir&data=3D04%7C01%7Chaoyu.song%40futurewei.com%7Cb5edb2=
30deb64a7af63808d9ab6016eb%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C637=
729251465898432%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzI=
iLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=3DivEfRbM06rY3Nz6buTpSzp6s5PBI=
dE6lPKO0lTtzMds%3D&reserved=3D0>

Although these comments are primarily for the use of the Routing ADs, it wo=
uld be helpful if you could consider them along with any other IETF Last Ca=
ll comments that you receive, and strive to resolve them through discussion=
 or by updating the draft.

Document: draft-ietf-opsawg-ntf-10
Reviewer: Dhruv Dhody
Review Date: 2021-11-19
IETF LC End Date: over
Intended Status: Informational

Summary:
Choose from this list...
* I have some minor concerns about this document that I think should be res=
olved before publication.

Comments:
* I find the document to be useful. It is well structured and easy to read.=
 Since the aim of the document is to clarify the taxonomy and framework, I =
hope to see more drafts to refer to it when describing network telemetry. I=
 have a few suggestions of things that are missing, some queries and nits t=
hat are easy to resolve, and hopefully improve the document further.

Minor Issues:
* Well almost Major :)
o   Something that I find missing in the document is that the network contr=
oller could be a valuable source of network telemetry as well. Consider a P=
CE, the controller could be a source of network-wide data, such as the asso=
ciation between network paths, cumulative network metrics, global network u=
tilization, etc. The document is currently very network-device-specific (as=
 a data source). My suggestion would be to handle the centralized controlle=
r either as a separate section or part of the control plane and management =
plane telemetry.
[HS] We hold a view on a telemetry system that it collects data from differ=
ent network planes, in which a centralized controller, if exists,  is the h=
ost for the telemetry  applications and a consumer for the data. In a sense=
, a controller acquires the original data from various network planes and i=
t might further process the data and even generate new data based on teleme=
try data for applications. We summarize this process as "network operation =
applications" in the framework. Is this an acceptable view?
o   Something else that I find missing is the multi-domain aspects. You cou=
ld mark it as out of scope or better yet do talk about it how there could p=
ossibly be a hierarchy and recursive nature in your framework to handle mul=
ti-domain. Currently, it is mentioned in passing while describing data fusi=
on in section 3.4.
[HS] Multi-domain has many particular issues we think we should leave out o=
f scope, although the general framework would still fit. We will make it cl=
ear in the new revision.
* Query
o   Section 4.1
?  In figure 2, why MIB is mentioned in the management plane only, why not =
control plane when various control plane protocols have MIBs? Similarly, th=
ere are forwarding statistics MIB that might work in the forwarding plane? =
Also, add SNMP and ASN.1(?) in the table corresponding to MIB.
[HS] In the text we "note that the  selected techniques [in the figure] jus=
t reflect the de facto state of the art and are by no means exhaustive." He=
re we only mean to provide some representatives in each category.
?  What is a 'mirror'? Maybe expand it or put a * and expand it at the bott=
om
[HS] We'll expand it as suggested.
?  All external data coming from gRPC only?
[HS] No necessarily. Note that this is just a representative. We don't mean=
 to provide an exhaustive list.
* Others
o   Section 6
?  The Independent management network is mentioned only in passing. Shouldn=
't there be a much stronger recommendation for this instead?
[HS] In this section we just list the security considerations and the recom=
mended solution is out of scope of this document. If you have some mature p=
ractices to recommend, we'd like to add a few sentences on this.

Nits:
* From IDNits

  =3D=3D Outdated reference: draft-ietf-grow-bmp-adj-rib-out has been publi=
shed

     as RFC 8671



  =3D=3D Outdated reference: draft-ietf-ippm-multipoint-alt-mark has been

     published as RFC 8889



  =3D=3D Outdated reference: A later version (-11) exists of

     draft-song-ippm-postcard-based-telemetry-10
* Section 2
o   Add reference for
?  GPB - https://developers.google.com/protocol-buffers<https://nam11.safel=
inks.protection.outlook.com/?url=3Dhttps%3A%2F%2Fdevelopers.google.com%2Fpr=
otocol-buffers&data=3D04%7C01%7Chaoyu.song%40futurewei.com%7Cb5edb230deb64a=
7af63808d9ab6016eb%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C63772925146=
5908382%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI=
6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=3DmQZlJJs4UrLeLkEui0aoeOibD%2B%2BnPybD=
p2ZkHkbMgZA%3D&reserved=3D0>
?  IOAM - draft-ietf-ippm-ioam-data
?  NetFlow - reference is incorrect, it should be RFC 3954
?  SNMP - for the sake of covering all versions, we should mention v3 as we=
ll - RFC 3414
* Section 3.3
o   Add reference for
?  Syslog - RFC 5424
?  sFlow - RFC 3176
o   Expand PSAMP - Packet Sampling
* Section 4.1
o   The list of 6 angles in the text and the 1st column in the table do not=
 match.
o   Expand ASICs - Application-Specific Integrated Circuits
* Section 4.1.1
o   The use of the term "server" can be confusing here. Would you consider =
using "data source"?
* Section 4.1.2
o   I am unaware of the term "video fluency". Is it a term of art that I am=
 unaware of?
o   Add reference to Y.1731 - "ITU-T, "OAM Functions and Mechanisms for Eth=
ernet based networks", ITU-T Y.1731, 2006."
* Section A.1.2
o   gNMI reference is marked as [I-D.openconfig-rtgwg-gnmi-spec] whereas, i=
n the main body, it is [gnmi] "gNMI - gRPC Network Management Interface", h=
ttps://github.com/openconfig/reference/tree/master/rpc/gnmi<https://nam11.s=
afelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Fgithub.com%2Fopenconfi=
g%2Freference%2Ftree%2Fmaster%2Frpc%2Fgnmi&data=3D04%7C01%7Chaoyu.song%40fu=
turewei.com%7Cb5edb230deb64a7af63808d9ab6016eb%7C0fee8ff2a3b240189c753a1d55=
91fedc%7C1%7C0%7C637729251465908382%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjA=
wMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=3DELnuFuo1=
S7ecfZ4juK%2BdRDUoYaZWpnbb1O35IosmQRo%3D&reserved=3D0>. Any reason for diff=
erent references?
o   same for gRPC!
* Section A.3.6
o   Expand L2VPN, NVO3, BIER, SFC, DETNET
o   Is there anything about SR and Multicast worth adding to the list?

[HS] Thanks for catching the nits. All these will be fixed in the new revis=
ion.



Thanks!
Dhruv



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<body lang=3D"EN-US" link=3D"blue" vlink=3D"purple" style=3D"word-wrap:brea=
k-word">
<div class=3D"WordSection1">
<p class=3D"MsoNormal">Hi Dhruv,<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Thank you very much for the review! Please see inlin=
e for our response and proposed modifications. We&#8217;ll update the docum=
ent once we hear back from you. Thanks!<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Best regards,<o:p></o:p></p>
<p class=3D"MsoNormal">Haoyu<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b>From:</b> Dhruv Dhody &lt;dhruv.ietf@gmail.com&gt=
; <br>
<b>Sent:</b> Friday, November 19, 2021 5:25 AM<br>
<b>To:</b> rtg-dir@ietf.org; last-call@ietf.org; draft-ietf-opsawg-ntf.all@=
ietf.org<br>
<b>Cc:</b> rtgdir-chairs@ietf.org; rtgdir-ads@ietf.org; opsawg &lt;opsawg@i=
etf.org&gt;<br>
<b>Subject:</b> RtgDir Last Call review: draft-ietf-opsawg-ntf-10<o:p></o:p=
></p>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<div>
<div id=3D"gmail-:2232">
<div id=3D"gmail-:h4y0">
<div>
<div>
<div>
<div style=3D"margin-top:6.0pt;font-size:0.875rem" id=3D"gmail-:o2kj">
<div id=3D"gmail-:o2ki">
<div>
<div>
<p style=3D"mso-margin-top-alt:0in;margin-right:0in;margin-bottom:12.0pt;ma=
rgin-left:0in">
<span style=3D"font-size:12.0pt;font-family:&quot;Trebuchet MS&quot;,sans-s=
erif;color:#333333;letter-spacing:.25pt">Hello,</span><span style=3D"font-s=
ize:12.0pt;font-family:&quot;Arial&quot;,sans-serif;color:#333333;letter-sp=
acing:.25pt"><o:p></o:p></span></p>
<p style=3D"mso-margin-top-alt:0in;margin-right:0in;margin-bottom:12.0pt;ma=
rgin-left:0in;box-sizing:border-box">
<span style=3D"font-size:12.0pt;font-family:&quot;Trebuchet MS&quot;,sans-s=
erif;color:#333333;letter-spacing:.25pt">I have been selected as the Routin=
g Directorate reviewer for this draft. The Routing Directorate seeks to rev=
iew all routing or routing-related drafts as
 they pass through IETF last call and IESG review, and sometimes on special=
 request. The purpose of the review is to provide assistance to the Routing=
 ADs. For more information about the Routing Directorate, please see&nbsp;<=
/span><a href=3D"https://nam11.safelinks.protection.outlook.com/?url=3Dhttp=
%3A%2F%2Ftrac.tools.ietf.org%2Farea%2Frtg%2Ftrac%2Fwiki%2FRtgDir&amp;data=
=3D04%7C01%7Chaoyu.song%40futurewei.com%7Cb5edb230deb64a7af63808d9ab6016eb%=
7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C637729251465898432%7CUnknown%7=
CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn=
0%3D%7C3000&amp;sdata=3DivEfRbM06rY3Nz6buTpSzp6s5PBIdE6lPKO0lTtzMds%3D&amp;=
reserved=3D0" target=3D"_blank"><span style=3D"font-size:12.0pt;font-family=
:&quot;Trebuchet MS&quot;,sans-serif;color:#337AB7;letter-spacing:.25pt">ht=
tp://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir</span></a><span style=3D=
"font-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif;color:#333333;le=
tter-spacing:.25pt"><o:p></o:p></span></p>
<p style=3D"mso-margin-top-alt:0in;margin-right:0in;margin-bottom:12.0pt;ma=
rgin-left:0in;box-sizing:border-box">
<span style=3D"font-size:12.0pt;font-family:&quot;Trebuchet MS&quot;,sans-s=
erif;color:#333333;letter-spacing:.25pt">Although these comments are primar=
ily for the use of the Routing ADs, it would be helpful if you could consid=
er them along with any other IETF Last Call
 comments that you receive, and strive to resolve them through discussion o=
r by updating the draft.</span><span style=3D"font-size:12.0pt;font-family:=
&quot;Arial&quot;,sans-serif;color:#333333;letter-spacing:.25pt"><o:p></o:p=
></span></p>
<p style=3D"mso-margin-top-alt:0in;margin-right:0in;margin-bottom:12.0pt;ma=
rgin-left:0in;box-sizing:border-box">
<span style=3D"font-size:12.0pt;font-family:&quot;Trebuchet MS&quot;,sans-s=
erif;color:#333333;letter-spacing:.25pt">Document: draft-ietf-opsawg-ntf-10=
<br>
Reviewer: Dhruv Dhody<br>
Review Date: 2021-11-19<br>
IETF LC End Date: over<br>
Intended Status: Informational</span><span style=3D"font-size:12.0pt;font-f=
amily:&quot;Arial&quot;,sans-serif;color:#333333;letter-spacing:.25pt"><o:p=
></o:p></span></p>
<p style=3D"mso-margin-top-alt:0in;margin-right:0in;margin-bottom:12.0pt;ma=
rgin-left:0in;box-sizing:border-box">
<b><span style=3D"font-size:12.0pt;font-family:&quot;Trebuchet MS&quot;,san=
s-serif;color:#333333;letter-spacing:.25pt">Summary:</span></b><span style=
=3D"font-size:12.0pt;font-family:&quot;Trebuchet MS&quot;,sans-serif;color:=
#333333;letter-spacing:.25pt"><br>
Choose from this list&#8230;</span><span style=3D"font-size:12.0pt;font-fam=
ily:&quot;Arial&quot;,sans-serif;color:#333333;letter-spacing:.25pt"><o:p><=
/o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto;margin-left:47.25pt;text-indent:-.25in;mso-list:l4 level1 lfo2">
<![if !supportLists]><span style=3D"font-size:10.0pt;font-family:Symbol;col=
or:#333333;letter-spacing:.25pt"><span style=3D"mso-list:Ignore">&middot;<s=
pan style=3D"font:7.0pt &quot;Times New Roman&quot;">
</span></span></span><![endif]><span style=3D"font-size:12.0pt;font-family:=
&quot;Trebuchet MS&quot;,sans-serif;color:#333333;letter-spacing:.25pt">I h=
ave some minor concerns about this document that I think should be resolved=
 before publication.</span><span style=3D"font-size:12.0pt;font-family:&quo=
t;Arial&quot;,sans-serif;color:#333333;letter-spacing:.25pt"><o:p></o:p></s=
pan></p>
<p style=3D"mso-margin-top-alt:0in;margin-right:0in;margin-bottom:12.0pt;ma=
rgin-left:0in;box-sizing:border-box">
<b><span style=3D"font-size:12.0pt;font-family:&quot;Trebuchet MS&quot;,san=
s-serif;color:#333333;letter-spacing:.25pt">Comments:</span></b><span style=
=3D"font-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif;color:#333333=
;letter-spacing:.25pt"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto;margin-left:47.25pt;text-indent:-.25in;mso-list:l3 level1 lfo4">
<![if !supportLists]><span style=3D"font-size:10.0pt;font-family:Symbol;col=
or:#333333;letter-spacing:.25pt"><span style=3D"mso-list:Ignore">&middot;<s=
pan style=3D"font:7.0pt &quot;Times New Roman&quot;">
</span></span></span><![endif]><span style=3D"font-size:12.0pt;font-family:=
&quot;Trebuchet MS&quot;,sans-serif;color:#333333;letter-spacing:.25pt">I f=
ind the document to be useful. It is well structured and easy to read. Sinc=
e the aim of the document is to clarify the
 taxonomy and framework, I hope to see more drafts to refer to it when desc=
ribing network telemetry. I have a few suggestions of things that are missi=
ng, some queries and nits that are easy to resolve, and hopefully improve t=
he document further.</span><span style=3D"font-size:12.0pt;font-family:&quo=
t;Arial&quot;,sans-serif;color:#333333;letter-spacing:.25pt"><o:p></o:p></s=
pan></p>
<p style=3D"mso-margin-top-alt:0in;margin-right:0in;margin-bottom:12.0pt;ma=
rgin-left:0in;box-sizing:border-box">
<b><span style=3D"font-size:12.0pt;font-family:&quot;Trebuchet MS&quot;,san=
s-serif;color:#333333;letter-spacing:.25pt">Minor Issues:</span></b><span s=
tyle=3D"font-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif;color:#33=
3333;letter-spacing:.25pt"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto;margin-left:47.25pt;text-indent:-.25in;mso-list:l2 level1 lfo6">
<![if !supportLists]><span style=3D"font-size:10.0pt;font-family:Symbol;col=
or:#333333;letter-spacing:.25pt"><span style=3D"mso-list:Ignore">&middot;<s=
pan style=3D"font:7.0pt &quot;Times New Roman&quot;">
</span></span></span><![endif]><span style=3D"font-size:12.0pt;font-family:=
&quot;Trebuchet MS&quot;,sans-serif;color:#333333;letter-spacing:.25pt">Wel=
l almost Major :)</span><span style=3D"font-size:12.0pt;font-family:&quot;A=
rial&quot;,sans-serif;color:#333333;letter-spacing:.25pt"><o:p></o:p></span=
></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto;margin-left:94.5pt;text-indent:-.25in;mso-list:l2 level2 lfo6">
<![if !supportLists]><span style=3D"font-size:10.0pt;font-family:&quot;Cour=
ier New&quot;,serif;color:#333333;letter-spacing:.25pt"><span style=3D"mso-=
list:Ignore">o<span style=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;=
&nbsp;
</span></span></span><![endif]><span style=3D"font-size:12.0pt;font-family:=
&quot;Trebuchet MS&quot;,sans-serif;color:#333333;letter-spacing:.25pt">Som=
ething that I find missing in the document is that the network controller c=
ould be a valuable source of network telemetry
 as well. Consider a PCE, the&nbsp;controller could be a source of network-=
wide data, such as the association between network paths, cumulative networ=
k metrics, global network utilization, etc. The document is currently very =
network-device-specific (as a data source).
 My suggestion would be to handle the centralized controller either as a se=
parate section or part of the control plane and management plane telemetry.=
</span><span style=3D"font-size:12.0pt;font-family:&quot;Arial&quot;,sans-s=
erif;color:#333333;letter-spacing:.25pt"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"letter-spacing:.25pt">[HS] We hold a view on a tele=
metry system that it collects data from different network planes, in which =
a centralized controller, if exists,&nbsp;
 is the host for the telemetry&nbsp; applications and a consumer for the da=
ta. In a sense, a controller acquires the original data from various networ=
k planes and it might further process the data and even generate new data b=
ased on telemetry data for applications.
 We summarize this process as &#8220;network operation applications&#8221; =
in the framework. Is this an acceptable view?<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-top:3.0pt;mso-margin-bottom-alt:auto=
;margin-left:94.5pt;text-indent:-.25in;mso-list:l2 level2 lfo6">
<![if !supportLists]><span style=3D"font-size:10.0pt;font-family:&quot;Cour=
ier New&quot;,serif;color:#333333;letter-spacing:.25pt"><span style=3D"mso-=
list:Ignore">o<span style=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;=
&nbsp;
</span></span></span><![endif]><span style=3D"font-size:12.0pt;font-family:=
&quot;Trebuchet MS&quot;,sans-serif;color:#333333;letter-spacing:.25pt">Som=
ething else that I find missing is the multi-domain aspects. You could mark=
 it as out of scope or better yet do talk about
 it how there could possibly be a hierarchy and recursive nature in your fr=
amework to handle multi-domain. Currently, it is mentioned in passing while=
 describing data fusion in section 3.4.</span><span style=3D"font-size:12.0=
pt;font-family:&quot;Arial&quot;,sans-serif;color:#333333;letter-spacing:.2=
5pt"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-top:3.0pt;mso-margin-bottom-alt:auto=
"><span style=3D"letter-spacing:.25pt">[HS] Multi-domain has many particula=
r issues we think we should leave out of scope, although the general framew=
ork would still fit. We will make it clear
 in the new revision.&nbsp; <o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-top:3.0pt;mso-margin-bottom-alt:auto=
;margin-left:47.25pt;text-indent:-.25in;mso-list:l2 level1 lfo6">
<![if !supportLists]><span style=3D"font-size:10.0pt;font-family:Symbol;col=
or:#333333;letter-spacing:.25pt"><span style=3D"mso-list:Ignore">&middot;<s=
pan style=3D"font:7.0pt &quot;Times New Roman&quot;">
</span></span></span><![endif]><span style=3D"font-size:12.0pt;font-family:=
&quot;Trebuchet MS&quot;,sans-serif;color:#333333;letter-spacing:.25pt">Que=
ry</span><span style=3D"font-size:12.0pt;font-family:&quot;Arial&quot;,sans=
-serif;color:#333333;letter-spacing:.25pt"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto;margin-left:94.5pt;text-indent:-.25in;mso-list:l2 level2 lfo6">
<![if !supportLists]><span style=3D"font-size:10.0pt;font-family:&quot;Cour=
ier New&quot;,serif;color:#333333;letter-spacing:.25pt"><span style=3D"mso-=
list:Ignore">o<span style=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;=
&nbsp;
</span></span></span><![endif]><span style=3D"font-size:12.0pt;font-family:=
&quot;Trebuchet MS&quot;,sans-serif;color:#333333;letter-spacing:.25pt">Sec=
tion 4.1</span><span style=3D"font-size:12.0pt;font-family:&quot;Arial&quot=
;,sans-serif;color:#333333;letter-spacing:.25pt"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto;margin-left:141.75pt;text-indent:-.25in;mso-list:l2 level3 lfo6">
<![if !supportLists]><span style=3D"font-size:10.0pt;font-family:Wingdings;=
color:#333333;letter-spacing:.25pt"><span style=3D"mso-list:Ignore">&sect;<=
span style=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;
</span></span></span><![endif]><span style=3D"font-size:12.0pt;font-family:=
&quot;Trebuchet MS&quot;,sans-serif;color:#333333;letter-spacing:.25pt">In =
figure 2, why MIB is mentioned in the management plane only, why not contro=
l plane when various control plane protocols
 have MIBs? Similarly, there are forwarding statistics MIB that might work =
in the forwarding plane? Also, add SNMP and ASN.1(?) in the table correspon=
ding to MIB.</span><span style=3D"font-size:12.0pt;font-family:&quot;Arial&=
quot;,sans-serif;color:#333333;letter-spacing:.25pt"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"letter-spacing:.25pt">[HS] In the text we &#8220;no=
te that the&nbsp; selected techniques [in the figure] just reflect the de f=
acto state of the art and are by no means exhaustive.&#8221;
 Here we only mean to provide some representatives in each category. <o:p><=
/o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-top:3.0pt;mso-margin-bottom-alt:auto=
;margin-left:141.75pt;text-indent:-.25in;mso-list:l2 level3 lfo6">
<![if !supportLists]><span style=3D"font-size:10.0pt;font-family:Wingdings;=
color:#333333;letter-spacing:.25pt"><span style=3D"mso-list:Ignore">&sect;<=
span style=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;
</span></span></span><![endif]><span style=3D"font-size:12.0pt;font-family:=
&quot;Trebuchet MS&quot;,sans-serif;color:#333333;letter-spacing:.25pt">Wha=
t is&nbsp;a &#8216;mirror&#8217;? Maybe expand it or put a * and expand it =
at the bottom</span><span style=3D"font-size:12.0pt;font-family:&quot;Arial=
&quot;,sans-serif;color:#333333;letter-spacing:.25pt"><o:p></o:p></span></p=
>
<p class=3D"MsoNormal" style=3D"margin-top:3.0pt;mso-margin-bottom-alt:auto=
"><span style=3D"letter-spacing:.25pt">[HS] We&#8217;ll expand it as sugges=
ted.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-top:3.0pt;mso-margin-bottom-alt:auto=
;margin-left:141.75pt;text-indent:-.25in;mso-list:l2 level3 lfo6">
<![if !supportLists]><span style=3D"font-size:10.0pt;font-family:Wingdings;=
color:#333333;letter-spacing:.25pt"><span style=3D"mso-list:Ignore">&sect;<=
span style=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;
</span></span></span><![endif]><span style=3D"font-size:12.0pt;font-family:=
&quot;Trebuchet MS&quot;,sans-serif;color:#333333;letter-spacing:.25pt">All=
 external data coming from gRPC only?</span><span style=3D"font-size:12.0pt=
;font-family:&quot;Arial&quot;,sans-serif;color:#333333;letter-spacing:.25p=
t"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-top:3.0pt;mso-margin-bottom-alt:auto=
"><span style=3D"letter-spacing:.25pt">[HS] No necessarily. Note that this =
is just a representative. We don&#8217;t mean to provide an exhaustive list=
.
<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-top:3.0pt;mso-margin-bottom-alt:auto=
;margin-left:47.25pt;text-indent:-.25in;mso-list:l2 level1 lfo6">
<![if !supportLists]><span style=3D"font-size:10.0pt;font-family:Symbol;col=
or:#333333;letter-spacing:.25pt"><span style=3D"mso-list:Ignore">&middot;<s=
pan style=3D"font:7.0pt &quot;Times New Roman&quot;">
</span></span></span><![endif]><span style=3D"font-size:12.0pt;font-family:=
&quot;Trebuchet MS&quot;,sans-serif;color:#333333;letter-spacing:.25pt">Oth=
ers</span><span style=3D"font-size:12.0pt;font-family:&quot;Arial&quot;,san=
s-serif;color:#333333;letter-spacing:.25pt"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto;margin-left:94.5pt;text-indent:-.25in;mso-list:l2 level2 lfo6">
<![if !supportLists]><span style=3D"font-size:10.0pt;font-family:&quot;Cour=
ier New&quot;,serif;color:#333333;letter-spacing:.25pt"><span style=3D"mso-=
list:Ignore">o<span style=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;=
&nbsp;
</span></span></span><![endif]><span style=3D"font-size:12.0pt;font-family:=
&quot;Trebuchet MS&quot;,sans-serif;color:#333333;letter-spacing:.25pt">Sec=
tion 6</span><span style=3D"font-size:12.0pt;font-family:&quot;Arial&quot;,=
sans-serif;color:#333333;letter-spacing:.25pt"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto;margin-left:141.75pt;text-indent:-.25in;mso-list:l2 level3 lfo6">
<![if !supportLists]><span style=3D"font-size:10.0pt;font-family:Wingdings;=
color:#333333;letter-spacing:.25pt"><span style=3D"mso-list:Ignore">&sect;<=
span style=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;
</span></span></span><![endif]><span style=3D"font-size:12.0pt;font-family:=
&quot;Trebuchet MS&quot;,sans-serif;color:#333333;letter-spacing:.25pt">The=
 Independent management network is mentioned only in passing. Shouldn&#8217=
;t there be a much stronger recommendation for this
 instead?</span><span style=3D"font-size:12.0pt;font-family:&quot;Arial&quo=
t;,sans-serif;color:#333333;letter-spacing:.25pt"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto;box-sizing:border-box">
<span style=3D"color:#333333;letter-spacing:.25pt">[HS] In this section we =
just list the security considerations and the recommended solution is out o=
f scope of this document. If you have some mature practices to recommend, w=
e&#8217;d like to add a few sentences on
 this. <o:p></o:p></span></p>
<p style=3D"mso-margin-top-alt:0in;margin-right:0in;margin-bottom:12.0pt;ma=
rgin-left:0in;box-sizing:border-box">
<b><span style=3D"font-size:12.0pt;font-family:&quot;Trebuchet MS&quot;,san=
s-serif;color:#333333;letter-spacing:.25pt">Nits:</span></b><span style=3D"=
font-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif;color:#333333;let=
ter-spacing:.25pt"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto;margin-left:47.25pt;text-indent:-.25in;mso-list:l1 level1 lfo8">
<![if !supportLists]><span style=3D"font-size:10.0pt;font-family:Symbol;col=
or:#333333;letter-spacing:.25pt"><span style=3D"mso-list:Ignore">&middot;<s=
pan style=3D"font:7.0pt &quot;Times New Roman&quot;">
</span></span></span><![endif]><span style=3D"font-size:12.0pt;font-family:=
&quot;Trebuchet MS&quot;,sans-serif;color:#333333;letter-spacing:.25pt">Fro=
m IDNits</span><span style=3D"font-size:12.0pt;font-family:&quot;Arial&quot=
;,sans-serif;color:#333333;letter-spacing:.25pt"><o:p></o:p></span></p>
<pre style=3D"background:#F7F7F7;white-space:pre-wrap;box-sizing:border-box=
;border-radius:3px;border:inherit;overflow:auto"><code><span style=3D"font-=
family:&quot;Trebuchet MS&quot;,sans-serif;color:#333333;letter-spacing:.25=
pt;border:none windowtext 1.0pt;padding:0in">&nbsp; =3D=3D Outdated referen=
ce: draft-ietf-grow-bmp-adj-rib-out has been published</span></code><code><=
span style=3D"font-family:&quot;Trebuchet MS&quot;,sans-serif;border:none w=
indowtext 1.0pt;padding:0in"><o:p></o:p></span></code></pre>
<pre style=3D"background:#F7F7F7"><code><span style=3D"font-family:&quot;Tr=
ebuchet MS&quot;,sans-serif;color:#333333;letter-spacing:.25pt;border:none =
windowtext 1.0pt;padding:0in">&nbsp;&nbsp;&nbsp;&nbsp; as RFC 8671<o:p></o:=
p></span></code></pre>
<pre style=3D"background:#F7F7F7"><code><span style=3D"font-family:&quot;Tr=
ebuchet MS&quot;,sans-serif;color:#333333;letter-spacing:.25pt;border:none =
windowtext 1.0pt;padding:0in"><o:p>&nbsp;</o:p></span></code></pre>
<pre style=3D"background:#F7F7F7"><code><span style=3D"font-family:&quot;Tr=
ebuchet MS&quot;,sans-serif;color:#333333;letter-spacing:.25pt;border:none =
windowtext 1.0pt;padding:0in">&nbsp; =3D=3D Outdated reference: draft-ietf-=
ippm-multipoint-alt-mark has been<o:p></o:p></span></code></pre>
<pre style=3D"background:#F7F7F7"><code><span style=3D"font-family:&quot;Tr=
ebuchet MS&quot;,sans-serif;color:#333333;letter-spacing:.25pt;border:none =
windowtext 1.0pt;padding:0in">&nbsp;&nbsp;&nbsp;&nbsp; published as RFC 888=
9<o:p></o:p></span></code></pre>
<pre style=3D"background:#F7F7F7"><code><span style=3D"font-family:&quot;Tr=
ebuchet MS&quot;,sans-serif;color:#333333;letter-spacing:.25pt;border:none =
windowtext 1.0pt;padding:0in"><o:p>&nbsp;</o:p></span></code></pre>
<pre style=3D"background:#F7F7F7"><code><span style=3D"font-family:&quot;Tr=
ebuchet MS&quot;,sans-serif;color:#333333;letter-spacing:.25pt;border:none =
windowtext 1.0pt;padding:0in">&nbsp; =3D=3D Outdated reference: A later ver=
sion (-11) exists of<o:p></o:p></span></code></pre>
<pre style=3D"background:#F7F7F7"><code><span style=3D"font-family:&quot;Tr=
ebuchet MS&quot;,sans-serif;color:#333333;letter-spacing:.25pt;border:none =
windowtext 1.0pt;padding:0in">&nbsp;&nbsp;&nbsp;&nbsp; draft-song-ippm-post=
card-based-telemetry-10<o:p></o:p></span></code></pre>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto;margin-left:47.25pt;text-indent:-.25in;mso-list:l0 level1 lfo10">
<![if !supportLists]><span style=3D"font-size:10.0pt;font-family:Symbol"><s=
pan style=3D"mso-list:Ignore">&middot;<span style=3D"font:7.0pt &quot;Times=
 New Roman&quot;">
</span></span></span><![endif]><span style=3D"font-size:12.0pt;font-family:=
&quot;Trebuchet MS&quot;,sans-serif;color:#333333;letter-spacing:.25pt">Sec=
tion 2</span><span style=3D"font-size:12.0pt;font-family:&quot;Arial&quot;,=
sans-serif"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto;margin-left:94.5pt;text-indent:-.25in;mso-list:l0 level2 lfo10">
<![if !supportLists]><span style=3D"font-size:10.0pt;font-family:&quot;Cour=
ier New&quot;,serif;color:#333333;letter-spacing:.25pt"><span style=3D"mso-=
list:Ignore">o<span style=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;=
&nbsp;
</span></span></span><![endif]><span style=3D"font-size:12.0pt;font-family:=
&quot;Trebuchet MS&quot;,sans-serif;color:#333333;letter-spacing:.25pt">Add=
 reference for</span><span style=3D"font-size:12.0pt;font-family:&quot;Aria=
l&quot;,sans-serif;color:#333333;letter-spacing:.25pt"><o:p></o:p></span></=
p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto;margin-left:141.75pt;text-indent:-.25in;mso-list:l0 level3 lfo10">
<![if !supportLists]><span style=3D"font-size:10.0pt;font-family:Wingdings;=
color:#333333;letter-spacing:.25pt"><span style=3D"mso-list:Ignore">&sect;<=
span style=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;
</span></span></span><![endif]><span style=3D"font-size:12.0pt;font-family:=
&quot;Trebuchet MS&quot;,sans-serif;color:#333333;letter-spacing:.25pt">GPB=
 -&nbsp;</span><a href=3D"https://nam11.safelinks.protection.outlook.com/?u=
rl=3Dhttps%3A%2F%2Fdevelopers.google.com%2Fprotocol-buffers&amp;data=3D04%7=
C01%7Chaoyu.song%40futurewei.com%7Cb5edb230deb64a7af63808d9ab6016eb%7C0fee8=
ff2a3b240189c753a1d5591fedc%7C1%7C0%7C637729251465908382%7CUnknown%7CTWFpbG=
Zsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C=
3000&amp;sdata=3DmQZlJJs4UrLeLkEui0aoeOibD%2B%2BnPybDp2ZkHkbMgZA%3D&amp;res=
erved=3D0" target=3D"_blank"><span style=3D"font-size:12.0pt;font-family:&q=
uot;Trebuchet MS&quot;,sans-serif;color:#337AB7;letter-spacing:.25pt">https=
://developers.google.com/protocol-buffers</span></a><span style=3D"font-siz=
e:12.0pt;font-family:&quot;Arial&quot;,sans-serif;color:#333333;letter-spac=
ing:.25pt"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-top:3.0pt;mso-margin-bottom-alt:auto=
;margin-left:141.75pt;text-indent:-.25in;mso-list:l0 level3 lfo10">
<![if !supportLists]><span style=3D"font-size:10.0pt;font-family:Wingdings;=
color:#333333;letter-spacing:.25pt"><span style=3D"mso-list:Ignore">&sect;<=
span style=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;
</span></span></span><![endif]><span style=3D"font-size:12.0pt;font-family:=
&quot;Trebuchet MS&quot;,sans-serif;color:#333333;letter-spacing:.25pt">IOA=
M - draft-ietf-ippm-ioam-data</span><span style=3D"font-size:12.0pt;font-fa=
mily:&quot;Arial&quot;,sans-serif;color:#333333;letter-spacing:.25pt"><o:p>=
</o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-top:3.0pt;mso-margin-bottom-alt:auto=
;margin-left:141.75pt;text-indent:-.25in;mso-list:l0 level3 lfo10">
<![if !supportLists]><span style=3D"font-size:10.0pt;font-family:Wingdings;=
color:#333333;letter-spacing:.25pt"><span style=3D"mso-list:Ignore">&sect;<=
span style=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;
</span></span></span><![endif]><span style=3D"font-size:12.0pt;font-family:=
&quot;Trebuchet MS&quot;,sans-serif;color:#333333;letter-spacing:.25pt">Net=
Flow - reference is incorrect, it should be RFC 3954</span><span style=3D"f=
ont-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif;color:#333333;lett=
er-spacing:.25pt"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-top:3.0pt;mso-margin-bottom-alt:auto=
;margin-left:141.75pt;text-indent:-.25in;mso-list:l0 level3 lfo10">
<![if !supportLists]><span style=3D"font-size:10.0pt;font-family:Wingdings;=
color:#333333;letter-spacing:.25pt"><span style=3D"mso-list:Ignore">&sect;<=
span style=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;
</span></span></span><![endif]><span style=3D"font-size:12.0pt;font-family:=
&quot;Trebuchet MS&quot;,sans-serif;color:#333333;letter-spacing:.25pt">SNM=
P - for the sake of covering all versions, we should mention v3 as well - R=
FC 3414</span><span style=3D"font-size:12.0pt;font-family:&quot;Arial&quot;=
,sans-serif;color:#333333;letter-spacing:.25pt"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-top:3.0pt;mso-margin-bottom-alt:auto=
;margin-left:47.25pt;text-indent:-.25in;mso-list:l0 level1 lfo10">
<![if !supportLists]><span style=3D"font-size:10.0pt;font-family:Symbol;col=
or:#333333;letter-spacing:.25pt"><span style=3D"mso-list:Ignore">&middot;<s=
pan style=3D"font:7.0pt &quot;Times New Roman&quot;">
</span></span></span><![endif]><span style=3D"font-size:12.0pt;font-family:=
&quot;Trebuchet MS&quot;,sans-serif;color:#333333;letter-spacing:.25pt">Sec=
tion 3.3</span><span style=3D"font-size:12.0pt;font-family:&quot;Arial&quot=
;,sans-serif;color:#333333;letter-spacing:.25pt"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto;margin-left:94.5pt;text-indent:-.25in;mso-list:l0 level2 lfo10">
<![if !supportLists]><span style=3D"font-size:10.0pt;font-family:&quot;Cour=
ier New&quot;,serif;color:#333333;letter-spacing:.25pt"><span style=3D"mso-=
list:Ignore">o<span style=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;=
&nbsp;
</span></span></span><![endif]><span style=3D"font-size:12.0pt;font-family:=
&quot;Trebuchet MS&quot;,sans-serif;color:#333333;letter-spacing:.25pt">Add=
 reference for</span><span style=3D"font-size:12.0pt;font-family:&quot;Aria=
l&quot;,sans-serif;color:#333333;letter-spacing:.25pt"><o:p></o:p></span></=
p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto;margin-left:141.75pt;text-indent:-.25in;mso-list:l0 level3 lfo10">
<![if !supportLists]><span style=3D"font-size:10.0pt;font-family:Wingdings;=
color:#333333;letter-spacing:.25pt"><span style=3D"mso-list:Ignore">&sect;<=
span style=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;
</span></span></span><![endif]><span style=3D"font-size:12.0pt;font-family:=
&quot;Trebuchet MS&quot;,sans-serif;color:#333333;letter-spacing:.25pt">Sys=
log - RFC 5424</span><span style=3D"font-size:12.0pt;font-family:&quot;Aria=
l&quot;,sans-serif;color:#333333;letter-spacing:.25pt"><o:p></o:p></span></=
p>
<p class=3D"MsoNormal" style=3D"margin-top:3.0pt;mso-margin-bottom-alt:auto=
;margin-left:141.75pt;text-indent:-.25in;mso-list:l0 level3 lfo10">
<![if !supportLists]><span style=3D"font-size:10.0pt;font-family:Wingdings;=
color:#333333;letter-spacing:.25pt"><span style=3D"mso-list:Ignore">&sect;<=
span style=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;
</span></span></span><![endif]><span style=3D"font-size:12.0pt;font-family:=
&quot;Trebuchet MS&quot;,sans-serif;color:#333333;letter-spacing:.25pt">sFl=
ow - RFC 3176</span><span style=3D"font-size:12.0pt;font-family:&quot;Arial=
&quot;,sans-serif;color:#333333;letter-spacing:.25pt"><o:p></o:p></span></p=
>
<p class=3D"MsoNormal" style=3D"margin-top:3.0pt;mso-margin-bottom-alt:auto=
;margin-left:94.5pt;text-indent:-.25in;mso-list:l0 level2 lfo10">
<![if !supportLists]><span style=3D"font-size:10.0pt;font-family:&quot;Cour=
ier New&quot;,serif;color:#333333;letter-spacing:.25pt"><span style=3D"mso-=
list:Ignore">o<span style=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;=
&nbsp;
</span></span></span><![endif]><span style=3D"font-size:12.0pt;font-family:=
&quot;Trebuchet MS&quot;,sans-serif;color:#333333;letter-spacing:.25pt">Exp=
and PSAMP - Packet Sampling</span><span style=3D"font-size:12.0pt;font-fami=
ly:&quot;Arial&quot;,sans-serif;color:#333333;letter-spacing:.25pt"><o:p></=
o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-top:3.0pt;mso-margin-bottom-alt:auto=
;margin-left:47.25pt;text-indent:-.25in;mso-list:l0 level1 lfo10">
<![if !supportLists]><span style=3D"font-size:10.0pt;font-family:Symbol;col=
or:#333333;letter-spacing:.25pt"><span style=3D"mso-list:Ignore">&middot;<s=
pan style=3D"font:7.0pt &quot;Times New Roman&quot;">
</span></span></span><![endif]><span style=3D"font-size:12.0pt;font-family:=
&quot;Trebuchet MS&quot;,sans-serif;color:#333333;letter-spacing:.25pt">Sec=
tion 4.1</span><span style=3D"font-size:12.0pt;font-family:&quot;Arial&quot=
;,sans-serif;color:#333333;letter-spacing:.25pt"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto;margin-left:94.5pt;text-indent:-.25in;mso-list:l0 level2 lfo10">
<![if !supportLists]><span style=3D"font-size:10.0pt;font-family:&quot;Cour=
ier New&quot;,serif;color:#333333;letter-spacing:.25pt"><span style=3D"mso-=
list:Ignore">o<span style=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;=
&nbsp;
</span></span></span><![endif]><span style=3D"font-size:12.0pt;font-family:=
&quot;Trebuchet MS&quot;,sans-serif;color:#333333;letter-spacing:.25pt">The=
 list of 6 angles in the text and the 1st column in the table do not match.=
</span><span style=3D"font-size:12.0pt;font-family:&quot;Arial&quot;,sans-s=
erif;color:#333333;letter-spacing:.25pt"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-top:3.0pt;mso-margin-bottom-alt:auto=
;margin-left:94.5pt;text-indent:-.25in;mso-list:l0 level2 lfo10">
<![if !supportLists]><span style=3D"font-size:10.0pt;font-family:&quot;Cour=
ier New&quot;,serif;color:#333333;letter-spacing:.25pt"><span style=3D"mso-=
list:Ignore">o<span style=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;=
&nbsp;
</span></span></span><![endif]><span style=3D"font-size:12.0pt;font-family:=
&quot;Trebuchet MS&quot;,sans-serif;color:#333333;letter-spacing:.25pt">Exp=
and ASICs - Application-Specific Integrated Circuits</span><span style=3D"f=
ont-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif;color:#333333;lett=
er-spacing:.25pt"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-top:3.0pt;mso-margin-bottom-alt:auto=
;margin-left:47.25pt;text-indent:-.25in;mso-list:l0 level1 lfo10">
<![if !supportLists]><span style=3D"font-size:10.0pt;font-family:Symbol;col=
or:#333333;letter-spacing:.25pt"><span style=3D"mso-list:Ignore">&middot;<s=
pan style=3D"font:7.0pt &quot;Times New Roman&quot;">
</span></span></span><![endif]><span style=3D"font-size:12.0pt;font-family:=
&quot;Trebuchet MS&quot;,sans-serif;color:#333333;letter-spacing:.25pt">Sec=
tion 4.1.1</span><span style=3D"font-size:12.0pt;font-family:&quot;Arial&qu=
ot;,sans-serif;color:#333333;letter-spacing:.25pt"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto;margin-left:94.5pt;text-indent:-.25in;mso-list:l0 level2 lfo10">
<![if !supportLists]><span style=3D"font-size:10.0pt;font-family:&quot;Cour=
ier New&quot;,serif;color:#333333;letter-spacing:.25pt"><span style=3D"mso-=
list:Ignore">o<span style=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;=
&nbsp;
</span></span></span><![endif]><span style=3D"font-size:12.0pt;font-family:=
&quot;Trebuchet MS&quot;,sans-serif;color:#333333;letter-spacing:.25pt">The=
 use of the term &#8220;server&#8221; can be confusing here. Would you cons=
ider using &#8220;data source&#8221;?</span><span style=3D"font-size:12.0pt=
;font-family:&quot;Arial&quot;,sans-serif;color:#333333;letter-spacing:.25p=
t"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-top:3.0pt;mso-margin-bottom-alt:auto=
;margin-left:47.25pt;text-indent:-.25in;mso-list:l0 level1 lfo10">
<![if !supportLists]><span style=3D"font-size:10.0pt;font-family:Symbol;col=
or:#333333;letter-spacing:.25pt"><span style=3D"mso-list:Ignore">&middot;<s=
pan style=3D"font:7.0pt &quot;Times New Roman&quot;">
</span></span></span><![endif]><span style=3D"font-size:12.0pt;font-family:=
&quot;Trebuchet MS&quot;,sans-serif;color:#333333;letter-spacing:.25pt">Sec=
tion 4.1.2</span><span style=3D"font-size:12.0pt;font-family:&quot;Arial&qu=
ot;,sans-serif;color:#333333;letter-spacing:.25pt"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto;margin-left:94.5pt;text-indent:-.25in;mso-list:l0 level2 lfo10">
<![if !supportLists]><span style=3D"font-size:10.0pt;font-family:&quot;Cour=
ier New&quot;,serif;color:#333333;letter-spacing:.25pt"><span style=3D"mso-=
list:Ignore">o<span style=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;=
&nbsp;
</span></span></span><![endif]><span style=3D"font-size:12.0pt;font-family:=
&quot;Trebuchet MS&quot;,sans-serif;color:#333333;letter-spacing:.25pt">I a=
m unaware of the term &#8220;video fluency&#8221;. Is it a term of art that=
 I am unaware of?</span><span style=3D"font-size:12.0pt;font-family:&quot;A=
rial&quot;,sans-serif;color:#333333;letter-spacing:.25pt"><o:p></o:p></span=
></p>
<p class=3D"MsoNormal" style=3D"margin-top:3.0pt;mso-margin-bottom-alt:auto=
;margin-left:94.5pt;text-indent:-.25in;mso-list:l0 level2 lfo10">
<![if !supportLists]><span style=3D"font-size:10.0pt;font-family:&quot;Cour=
ier New&quot;,serif;color:#333333;letter-spacing:.25pt"><span style=3D"mso-=
list:Ignore">o<span style=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;=
&nbsp;
</span></span></span><![endif]><span style=3D"font-size:12.0pt;font-family:=
&quot;Trebuchet MS&quot;,sans-serif;color:#333333;letter-spacing:.25pt">Add=
 reference to Y.1731 - &#8220;ITU-T, &#8220;OAM Functions and Mechanisms fo=
r Ethernet based networks&#8221;, ITU-T Y.1731, 2006.&#8221;</span><span st=
yle=3D"font-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif;color:#333=
333;letter-spacing:.25pt"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-top:3.0pt;mso-margin-bottom-alt:auto=
;margin-left:47.25pt;text-indent:-.25in;mso-list:l0 level1 lfo10">
<![if !supportLists]><span style=3D"font-size:10.0pt;font-family:Symbol;col=
or:#333333;letter-spacing:.25pt"><span style=3D"mso-list:Ignore">&middot;<s=
pan style=3D"font:7.0pt &quot;Times New Roman&quot;">
</span></span></span><![endif]><span style=3D"font-size:12.0pt;font-family:=
&quot;Trebuchet MS&quot;,sans-serif;color:#333333;letter-spacing:.25pt">Sec=
tion A.1.2</span><span style=3D"font-size:12.0pt;font-family:&quot;Arial&qu=
ot;,sans-serif;color:#333333;letter-spacing:.25pt"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto;margin-left:94.5pt;text-indent:-.25in;mso-list:l0 level2 lfo10">
<![if !supportLists]><span style=3D"font-size:10.0pt;font-family:&quot;Cour=
ier New&quot;,serif;color:#333333;letter-spacing:.25pt"><span style=3D"mso-=
list:Ignore">o<span style=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;=
&nbsp;
</span></span></span><![endif]><span style=3D"font-size:12.0pt;font-family:=
&quot;Trebuchet MS&quot;,sans-serif;color:#333333;letter-spacing:.25pt">gNM=
I reference is marked as [I-D.openconfig-rtgwg-gnmi-spec] whereas, in the m=
ain body, it is [gnmi] &#8220;gNMI - gRPC Network
 Management Interface&#8221;,&nbsp;</span><a href=3D"https://nam11.safelink=
s.protection.outlook.com/?url=3Dhttps%3A%2F%2Fgithub.com%2Fopenconfig%2Fref=
erence%2Ftree%2Fmaster%2Frpc%2Fgnmi&amp;data=3D04%7C01%7Chaoyu.song%40futur=
ewei.com%7Cb5edb230deb64a7af63808d9ab6016eb%7C0fee8ff2a3b240189c753a1d5591f=
edc%7C1%7C0%7C637729251465908382%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMD=
AiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&amp;sdata=3DELnuFuo=
1S7ecfZ4juK%2BdRDUoYaZWpnbb1O35IosmQRo%3D&amp;reserved=3D0" target=3D"_blan=
k"><span style=3D"font-size:12.0pt;font-family:&quot;Trebuchet MS&quot;,san=
s-serif;color:#337AB7;letter-spacing:.25pt">https://github.com/openconfig/r=
eference/tree/master/rpc/gnmi</span></a><span style=3D"font-size:12.0pt;fon=
t-family:&quot;Trebuchet MS&quot;,sans-serif;color:#333333;letter-spacing:.=
25pt">.
 Any reason for different references?</span><span style=3D"font-size:12.0pt=
;font-family:&quot;Arial&quot;,sans-serif;color:#333333;letter-spacing:.25p=
t"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-top:3.0pt;mso-margin-bottom-alt:auto=
;margin-left:94.5pt;text-indent:-.25in;mso-list:l0 level2 lfo10">
<![if !supportLists]><span style=3D"font-size:10.0pt;font-family:&quot;Cour=
ier New&quot;,serif;color:#333333;letter-spacing:.25pt"><span style=3D"mso-=
list:Ignore">o<span style=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;=
&nbsp;
</span></span></span><![endif]><span style=3D"font-size:12.0pt;font-family:=
&quot;Trebuchet MS&quot;,sans-serif;color:#333333;letter-spacing:.25pt">sam=
e for gRPC!</span><span style=3D"font-size:12.0pt;font-family:&quot;Arial&q=
uot;,sans-serif;color:#333333;letter-spacing:.25pt"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-top:3.0pt;mso-margin-bottom-alt:auto=
;margin-left:47.25pt;text-indent:-.25in;mso-list:l0 level1 lfo10">
<![if !supportLists]><span style=3D"font-size:10.0pt;font-family:Symbol;col=
or:#333333;letter-spacing:.25pt"><span style=3D"mso-list:Ignore">&middot;<s=
pan style=3D"font:7.0pt &quot;Times New Roman&quot;">
</span></span></span><![endif]><span style=3D"font-size:12.0pt;font-family:=
&quot;Trebuchet MS&quot;,sans-serif;color:#333333;letter-spacing:.25pt">Sec=
tion A.3.6</span><span style=3D"font-size:12.0pt;font-family:&quot;Arial&qu=
ot;,sans-serif;color:#333333;letter-spacing:.25pt"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto;margin-left:94.5pt;text-indent:-.25in;mso-list:l0 level2 lfo10">
<![if !supportLists]><span style=3D"font-size:10.0pt;font-family:&quot;Cour=
ier New&quot;,serif;color:#333333;letter-spacing:.25pt"><span style=3D"mso-=
list:Ignore">o<span style=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;=
&nbsp;
</span></span></span><![endif]><span style=3D"font-size:12.0pt;font-family:=
&quot;Trebuchet MS&quot;,sans-serif;color:#333333;letter-spacing:.25pt">Exp=
and L2VPN, NVO3, BIER, SFC, DETNET</span><span style=3D"font-size:12.0pt;fo=
nt-family:&quot;Arial&quot;,sans-serif;color:#333333;letter-spacing:.25pt">=
<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-top:3.0pt;mso-margin-bottom-alt:auto=
;margin-left:94.5pt;text-indent:-.25in;mso-list:l0 level2 lfo10">
<![if !supportLists]><span style=3D"font-size:10.0pt;font-family:&quot;Cour=
ier New&quot;,serif;color:#333333;letter-spacing:.25pt"><span style=3D"mso-=
list:Ignore">o<span style=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;=
&nbsp;
</span></span></span><![endif]><span style=3D"font-size:12.0pt;font-family:=
&quot;Trebuchet MS&quot;,sans-serif;color:#333333;letter-spacing:.25pt">Is =
there anything about SR and Multicast worth adding to the list?</span><span=
 style=3D"font-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif;color:#=
333333;letter-spacing:.25pt"><o:p></o:p></span></p>
<p style=3D"margin:0in"><span style=3D"color:#333333;letter-spacing:.25pt">=
[HS] Thanks for catching the nits. All these will be fixed in the new revis=
ion.
<o:p></o:p></span></p>
<p style=3D"margin:0in"><span style=3D"font-size:12.0pt;font-family:&quot;T=
rebuchet MS&quot;,sans-serif;color:#333333;letter-spacing:.25pt"><o:p>&nbsp=
;</o:p></span></p>
<p style=3D"margin:0in"><span style=3D"font-size:12.0pt;font-family:&quot;T=
rebuchet MS&quot;,sans-serif;color:#333333;letter-spacing:.25pt">Thanks!</s=
pan><span style=3D"font-size:12.0pt;font-family:&quot;Trebuchet MS&quot;,sa=
ns-serif;color:#888888;letter-spacing:.25pt"><br>
Dhruv</span><span style=3D"font-size:12.0pt;font-family:&quot;Arial&quot;,s=
ans-serif;color:#333333;letter-spacing:.25pt"><o:p></o:p></span></p>
</div>
</div>
</div>
</div>
</div>
</div>
<p style=3D"mso-margin-top-alt:0in;margin-right:0in;margin-bottom:12.0pt;ma=
rgin-left:0in;box-sizing:border-box">
<span style=3D"font-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif;co=
lor:#333333;letter-spacing:.25pt"><o:p>&nbsp;</o:p></span></p>
</div>
</div>
</div>
</div>
</div>
</div>
</body>
</html>

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From: Dhruv Dhody <dhruv.ietf@gmail.com>
Date: Mon, 22 Nov 2021 09:52:09 +0530
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Hi Haoyu,

Thanks for taking my comments into consideration. Focusing on the open
points...


o   Something that I find missing in the document is that the network
> controller could be a valuable source of network telemetry as well.
> Consider a PCE, the controller could be a source of network-wide data, su=
ch
> as the association between network paths, cumulative network metrics,
> global network utilization, etc. The document is currently very
> network-device-specific (as a data source). My suggestion would be to
> handle the centralized controller either as a separate section or part of
> the control plane and management plane telemetry.
>
> [HS] We hold a view on a telemetry system that it collects data from
> different network planes, in which a centralized controller, if exists,  =
is
> the host for the telemetry  applications and a consumer for the data. In =
a
> sense, a controller acquires the original data from various network plane=
s
> and it might further process the data and even generate new data based on
> telemetry data for applications. We summarize this process as =E2=80=9Cne=
twork
> operation applications=E2=80=9D in the framework. Is this an acceptable v=
iew?
>

Dhruv: In most cases that could be true. I do find it limiting to assume
all such applications are hosted at a single central controller. Looking at
figure 3 in RFC 8309 - https://www.rfc-editor.org/rfc/rfc8309.html#section-=
4,
it is possible that the bottom controller does the telemetry handling but
the analysis and application happen at the orchestrator level.

Anyways, maybe you could add some version of the below text -

Note that in some cases the controller itself may be the source of
> telemetry data that is unique to it or derived from the telemetry data
> collected from the network elements. Some of the principles and taxonomy
> specific to the control plane and management plane telemetry could also b=
e
> applied to the controller when it is required to provide the telemetry da=
ta
> to Network Operation Applications hosted outside. The scope of the docume=
nt
> is focused on the network elements telemetry and further details related =
to
> controllers are thus out of scope.



> o   Something else that I find missing is the multi-domain aspects. You
> could mark it as out of scope or better yet do talk about it how there
> could possibly be a hierarchy and recursive nature in your framework to
> handle multi-domain. Currently, it is mentioned in passing while describi=
ng
> data fusion in section 3.4.
>
> [HS] Multi-domain has many particular issues we think we should leave out
> of scope, although the general framework would still fit. We will make it
> clear in the new revision.
>

Dhruv: Looking forward to the text!



> =C2=B7 Query
>
> o   Section 4.1
>
> =C2=A7  In figure 2, why MIB is mentioned in the management plane only, w=
hy
> not control plane when various control plane protocols have MIBs?
> Similarly, there are forwarding statistics MIB that might work in the
> forwarding plane? Also, add SNMP and ASN.1(?) in the table corresponding =
to
> MIB.
>
> [HS] In the text we =E2=80=9Cnote that the  selected techniques [in the f=
igure]
> just reflect the de facto state of the art and are by no means exhaustive=
.=E2=80=9D
> Here we only mean to provide some representatives in each category.
>

Dhruv: I understand that, it stood out to me because YANG was mentioned in
other planes but not MIB.

Thanks!
Dhruv



>

--00000000000008960f05d158fa29
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div dir=3D"ltr"><div class=3D"gmail_default" style=3D"fon=
t-family:trebuchet ms,sans-serif;font-size:small;color:#073763">Hi=C2=A0Hao=
yu,=C2=A0</div><div class=3D"gmail_default" style=3D"font-family:trebuchet =
ms,sans-serif;font-size:small;color:#073763"><br></div><div class=3D"gmail_=
default" style=3D"font-family:trebuchet ms,sans-serif;font-size:small;color=
:#073763">Thanks for taking my comments into consideration. Focusing on the=
 open points...=C2=A0</div></div><br><div class=3D"gmail_quote"><div dir=3D=
"ltr" class=3D"gmail_attr"><br></div><blockquote class=3D"gmail_quote" styl=
e=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);paddin=
g-left:1ex"><div lang=3D"EN-US" style=3D"overflow-wrap: break-word;"><div c=
lass=3D"gmail-m_5250262316037836265WordSection1"><div><div><div id=3D"gmail=
-m_5250262316037836265gmail-:2232"><div id=3D"gmail-m_5250262316037836265gm=
ail-:h4y0"><div><div><div><div style=3D"margin-top:6pt;font-size:0.875rem" =
id=3D"gmail-m_5250262316037836265gmail-:o2kj"><div id=3D"gmail-m_5250262316=
037836265gmail-:o2ki"><div><div>
<p class=3D"MsoNormal" style=3D"margin-left:94.5pt">
<u></u><span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;,se=
rif;color:rgb(51,51,51);letter-spacing:0.25pt"><span>o<span style=3D"font:7=
pt &quot;Times New Roman&quot;">=C2=A0=C2=A0
</span></span></span><u></u><span style=3D"font-size:12pt;font-family:&quot=
;Trebuchet MS&quot;,sans-serif;color:rgb(51,51,51);letter-spacing:0.25pt">S=
omething that I find missing in the document is that the network controller=
 could be a valuable source of network telemetry
 as well. Consider a PCE, the=C2=A0controller could be a source of network-=
wide data, such as the association between network paths, cumulative networ=
k metrics, global network utilization, etc. The document is currently very =
network-device-specific (as a data source).
 My suggestion would be to handle the centralized controller either as a se=
parate section or part of the control plane and management plane telemetry.=
</span><span style=3D"font-size:12pt;font-family:Arial,sans-serif;color:rgb=
(51,51,51);letter-spacing:0.25pt"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"letter-spacing:0.25pt">[HS] We hold a=
 view on a telemetry system that it collects data from different network pl=
anes, in which a centralized controller, if exists,=C2=A0
 is the host for the telemetry=C2=A0 applications and a consumer for the da=
ta. In a sense, a controller acquires the original data from various networ=
k planes and it might further process the data and even generate new data b=
ased on telemetry data for applications.
 We summarize this process as =E2=80=9C<span class=3D"gmail_default" style=
=3D"font-family:&quot;trebuchet ms&quot;,sans-serif;font-size:small;color:r=
gb(7,55,99)"></span>network operation applications=E2=80=9D in the framewor=
k. Is this an acceptable view?</span></p></div></div></div></div></div></di=
v></div></div></div></div></div></div></div></blockquote><div><br></div><di=
v><div class=3D"gmail_default" style=3D"font-family:&quot;trebuchet ms&quot=
;,sans-serif;font-size:small;color:rgb(7,55,99)">Dhruv: In most cases that =
could be true. I do find it limiting to assume all such applications are ho=
sted at a single central controller. Looking at figure 3 in RFC 8309 -=C2=
=A0<a href=3D"https://www.rfc-editor.org/rfc/rfc8309.html#section-4">https:=
//www.rfc-editor.org/rfc/rfc8309.html#section-4</a>, it is possible that th=
e bottom controller does the telemetry handling but the analysis and applic=
ation happen at the orchestrator level.=C2=A0</div></div><div class=3D"gmai=
l_default" style=3D"font-family:&quot;trebuchet ms&quot;,sans-serif;font-si=
ze:small;color:rgb(7,55,99)"><br></div><div class=3D"gmail_default" style=
=3D"font-family:&quot;trebuchet ms&quot;,sans-serif;font-size:small;color:r=
gb(7,55,99)">Anyways, maybe you could add some version of the below text -=
=C2=A0=C2=A0</div><div class=3D"gmail_default" style=3D"font-family:&quot;t=
rebuchet ms&quot;,sans-serif;font-size:small;color:rgb(7,55,99)"><br></div>=
<blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-=
left:1px solid rgb(204,204,204);padding-left:1ex"><font face=3D"monospace">=
Note that in some cases the controller itself may be the source of telemetr=
y data that is unique to it or derived from the telemetry data collected fr=
om the network elements. Some of the principles and taxonomy specific to th=
e control plane and management plane telemetry could also be applied to the=
 controller when it is required to provide the telemetry data to Network Op=
eration Applications hosted outside. The scope of the document is focused o=
n the network elements telemetry and further details related to controllers=
 are thus out of scope. </font></blockquote><div>=C2=A0</div><blockquote cl=
ass=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid=
 rgb(204,204,204);padding-left:1ex"><div lang=3D"EN-US" style=3D"overflow-w=
rap: break-word;"><div class=3D"gmail-m_5250262316037836265WordSection1"><d=
iv><div><div id=3D"gmail-m_5250262316037836265gmail-:2232"><div id=3D"gmail=
-m_5250262316037836265gmail-:h4y0"><div><div><div><div style=3D"margin-top:=
6pt;font-size:0.875rem" id=3D"gmail-m_5250262316037836265gmail-:o2kj"><div =
id=3D"gmail-m_5250262316037836265gmail-:o2ki"><div><div><p class=3D"MsoNorm=
al"><span style=3D"letter-spacing:0.25pt"><u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-top:3pt;margin-left:94.5pt">
<u></u><span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;,se=
rif;color:rgb(51,51,51);letter-spacing:0.25pt"><span>o<span style=3D"font:7=
pt &quot;Times New Roman&quot;">=C2=A0=C2=A0
</span></span></span><u></u><span style=3D"font-size:12pt;font-family:&quot=
;Trebuchet MS&quot;,sans-serif;color:rgb(51,51,51);letter-spacing:0.25pt">S=
omething else that I find missing is the multi-domain aspects. You could ma=
rk it as out of scope or better yet do talk about
 it how there could possibly be a hierarchy and recursive nature in your fr=
amework to handle multi-domain. Currently, it is mentioned in passing while=
 describing data fusion in section 3.4.</span><span style=3D"font-size:12pt=
;font-family:Arial,sans-serif;color:rgb(51,51,51);letter-spacing:0.25pt"><u=
></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-top:3pt"><span style=3D"letter-spaci=
ng:0.25pt">[HS] Multi-domain has many particular issues we think we should =
leave out of scope, although the general framework would still fit. We will=
 make it clear
 in the new revision.=C2=A0</span></p></div></div></div></div></div></div><=
/div></div></div></div></div></div></div></blockquote><div><br></div><div><=
div class=3D"gmail_default" style=3D"font-family:&quot;trebuchet ms&quot;,s=
ans-serif;font-size:small;color:rgb(7,55,99)">Dhruv: Looking forward to the=
 text! </div><br></div><div>=C2=A0</div><blockquote class=3D"gmail_quote" s=
tyle=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);pad=
ding-left:1ex"><div lang=3D"EN-US" style=3D"overflow-wrap: break-word;"><di=
v class=3D"gmail-m_5250262316037836265WordSection1"><div><div><div id=3D"gm=
ail-m_5250262316037836265gmail-:2232"><div id=3D"gmail-m_525026231603783626=
5gmail-:h4y0"><div><div><div><div style=3D"margin-top:6pt;font-size:0.875re=
m" id=3D"gmail-m_5250262316037836265gmail-:o2kj"><div id=3D"gmail-m_5250262=
316037836265gmail-:o2ki"><div><div><p class=3D"MsoNormal" style=3D"margin-t=
op:3pt"><span style=3D"letter-spacing:0.25pt"> <u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-top:3pt;margin-left:47.25pt">
<u></u><span style=3D"font-size:10pt;font-family:Symbol;color:rgb(51,51,51)=
;letter-spacing:0.25pt"><span>=C2=B7<span style=3D"font:7pt &quot;Times New=
 Roman&quot;">
</span></span></span><u></u><span style=3D"font-size:12pt;font-family:&quot=
;Trebuchet MS&quot;,sans-serif;color:rgb(51,51,51);letter-spacing:0.25pt">Q=
uery</span><span style=3D"font-size:12pt;font-family:Arial,sans-serif;color=
:rgb(51,51,51);letter-spacing:0.25pt"><u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:94.5pt">
<u></u><span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;,se=
rif;color:rgb(51,51,51);letter-spacing:0.25pt"><span>o<span style=3D"font:7=
pt &quot;Times New Roman&quot;">=C2=A0=C2=A0
</span></span></span><u></u><span style=3D"font-size:12pt;font-family:&quot=
;Trebuchet MS&quot;,sans-serif;color:rgb(51,51,51);letter-spacing:0.25pt">S=
ection 4.1</span><span style=3D"font-size:12pt;font-family:Arial,sans-serif=
;color:rgb(51,51,51);letter-spacing:0.25pt"><u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:141.75pt">
<u></u><span style=3D"font-size:10pt;font-family:Wingdings;color:rgb(51,51,=
51);letter-spacing:0.25pt"><span>=C2=A7<span style=3D"font:7pt &quot;Times =
New Roman&quot;">=C2=A0
</span></span></span><u></u><span style=3D"font-size:12pt;font-family:&quot=
;Trebuchet MS&quot;,sans-serif;color:rgb(51,51,51);letter-spacing:0.25pt">I=
n figure 2, why MIB is mentioned in the management plane only, why not cont=
rol plane when various control plane protocols
 have MIBs? Similarly, there are forwarding statistics MIB that might work =
in the forwarding plane? Also, add SNMP and ASN.1(?) in the table correspon=
ding to MIB.</span><span style=3D"font-size:12pt;font-family:Arial,sans-ser=
if;color:rgb(51,51,51);letter-spacing:0.25pt"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"letter-spacing:0.25pt">[HS] In the te=
xt we =E2=80=9Cnote that the=C2=A0 selected techniques [in the figure] just=
 reflect the de facto state of the art and are by no means exhaustive.=E2=
=80=9D
 Here we only mean to provide some representatives in each category.</span>=
</p></div></div></div></div></div></div></div></div></div></div></div></div=
></div></blockquote><div><br></div><div><div class=3D"gmail_default" style=
=3D"font-family:&quot;trebuchet ms&quot;,sans-serif;font-size:small;color:r=
gb(7,55,99)">Dhruv: I understand that, it stood out to me because YANG was =
mentioned in other planes but not MIB. </div><br></div><div><div class=3D"g=
mail_default" style=3D"font-family:&quot;trebuchet ms&quot;,sans-serif;font=
-size:small;color:rgb(7,55,99)">Thanks!=C2=A0</div><div class=3D"gmail_defa=
ult" style=3D"font-family:&quot;trebuchet ms&quot;,sans-serif;font-size:sma=
ll;color:rgb(7,55,99)">Dhruv</div><br></div><div>=C2=A0<br></div><blockquot=
e class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px s=
olid rgb(204,204,204);padding-left:1ex"><div lang=3D"EN-US" style=3D"overfl=
ow-wrap: break-word;"><div class=3D"gmail-m_5250262316037836265WordSection1=
"><div><div><div id=3D"gmail-m_5250262316037836265gmail-:2232"><div id=3D"g=
mail-m_5250262316037836265gmail-:h4y0"><div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>

</blockquote></div></div>

--00000000000008960f05d158fa29--


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From: Haoyu Song <haoyu.song@futurewei.com>
To: Dhruv Dhody <dhruv.ietf@gmail.com>
CC: "rtg-dir@ietf.org" <rtg-dir@ietf.org>, "last-call@ietf.org" <last-call@ietf.org>, "draft-ietf-opsawg-ntf.all@ietf.org" <draft-ietf-opsawg-ntf.all@ietf.org>, "rtgdir-chairs@ietf.org" <rtgdir-chairs@ietf.org>, "rtgdir-ads@ietf.org" <rtgdir-ads@ietf.org>, opsawg <opsawg@ietf.org>
Thread-Topic: RtgDir Last Call review: draft-ietf-opsawg-ntf-10
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Archived-At: <https://mailarchive.ietf.org/arch/msg/rtg-dir/VVe5BQh4eI9s33FXNGDYh6OZzVo>
Subject: Re: [RTG-DIR] RtgDir Last Call review: draft-ietf-opsawg-ntf-10
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Thank you very much Dhruv, the text you proposed has been included.

Best regards,
Haoyu

From: Dhruv Dhody <dhruv.ietf@gmail.com>
Sent: Sunday, November 21, 2021 8:22 PM
To: Haoyu Song <haoyu.song@futurewei.com>
Cc: rtg-dir@ietf.org; last-call@ietf.org; draft-ietf-opsawg-ntf.all@ietf.or=
g; rtgdir-chairs@ietf.org; rtgdir-ads@ietf.org; opsawg <opsawg@ietf.org>
Subject: Re: RtgDir Last Call review: draft-ietf-opsawg-ntf-10

Hi Haoyu,

Thanks for taking my comments into consideration. Focusing on the open poin=
ts...


o   Something that I find missing in the document is that the network contr=
oller could be a valuable source of network telemetry as well. Consider a P=
CE, the controller could be a source of network-wide data, such as the asso=
ciation between network paths, cumulative network metrics, global network u=
tilization, etc. The document is currently very network-device-specific (as=
 a data source). My suggestion would be to handle the centralized controlle=
r either as a separate section or part of the control plane and management =
plane telemetry.
[HS] We hold a view on a telemetry system that it collects data from differ=
ent network planes, in which a centralized controller, if exists,  is the h=
ost for the telemetry  applications and a consumer for the data. In a sense=
, a controller acquires the original data from various network planes and i=
t might further process the data and even generate new data based on teleme=
try data for applications. We summarize this process as "network operation =
applications" in the framework. Is this an acceptable view?

Dhruv: In most cases that could be true. I do find it limiting to assume al=
l such applications are hosted at a single central controller. Looking at f=
igure 3 in RFC 8309 - https://www.rfc-editor.org/rfc/rfc8309.html#section-4=
<https://nam11.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Fwww.rf=
c-editor.org%2Frfc%2Frfc8309.html%23section-4&data=3D04%7C01%7Chaoyu.song%4=
0futurewei.com%7Cf87d7c629ea14c2188ee08d9ad6fbced%7C0fee8ff2a3b240189c753a1=
d5591fedc%7C1%7C0%7C637731517699454988%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4w=
LjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=3DphgAd=
nLv9stOKAz5kQq0Kxq5Ga30Ik5cVd1V9rh5fV8%3D&reserved=3D0>, it is possible tha=
t the bottom controller does the telemetry handling but the analysis and ap=
plication happen at the orchestrator level.

Anyways, maybe you could add some version of the below text -

Note that in some cases the controller itself may be the source of telemetr=
y data that is unique to it or derived from the telemetry data collected fr=
om the network elements. Some of the principles and taxonomy specific to th=
e control plane and management plane telemetry could also be applied to the=
 controller when it is required to provide the telemetry data to Network Op=
eration Applications hosted outside. The scope of the document is focused o=
n the network elements telemetry and further details related to controllers=
 are thus out of scope.

o   Something else that I find missing is the multi-domain aspects. You cou=
ld mark it as out of scope or better yet do talk about it how there could p=
ossibly be a hierarchy and recursive nature in your framework to handle mul=
ti-domain. Currently, it is mentioned in passing while describing data fusi=
on in section 3.4.
[HS] Multi-domain has many particular issues we think we should leave out o=
f scope, although the general framework would still fit. We will make it cl=
ear in the new revision.

Dhruv: Looking forward to the text!


* Query
o   Section 4.1
*  In figure 2, why MIB is mentioned in the management plane only, why not =
control plane when various control plane protocols have MIBs? Similarly, th=
ere are forwarding statistics MIB that might work in the forwarding plane? =
Also, add SNMP and ASN.1(?) in the table corresponding to MIB.
[HS] In the text we "note that the  selected techniques [in the figure] jus=
t reflect the de facto state of the art and are by no means exhaustive." He=
re we only mean to provide some representatives in each category.

Dhruv: I understand that, it stood out to me because YANG was mentioned in =
other planes but not MIB.

Thanks!
Dhruv



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<div class=3D"WordSection1">
<p class=3D"MsoNormal">Thank you very much Dhruv, the text you proposed has=
 been included.
<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Best regards,<o:p></o:p></p>
<p class=3D"MsoNormal">Haoyu<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b>From:</b> Dhruv Dhody &lt;dhruv.ietf@gmail.com&gt=
; <br>
<b>Sent:</b> Sunday, November 21, 2021 8:22 PM<br>
<b>To:</b> Haoyu Song &lt;haoyu.song@futurewei.com&gt;<br>
<b>Cc:</b> rtg-dir@ietf.org; last-call@ietf.org; draft-ietf-opsawg-ntf.all@=
ietf.org; rtgdir-chairs@ietf.org; rtgdir-ads@ietf.org; opsawg &lt;opsawg@ie=
tf.org&gt;<br>
<b>Subject:</b> Re: RtgDir Last Call review: draft-ietf-opsawg-ntf-10<o:p><=
/o:p></p>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;font-family:&quot;Tr=
ebuchet MS&quot;,sans-serif;color:#073763">Hi&nbsp;Haoyu,&nbsp;<o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;font-family:&quot;Tr=
ebuchet MS&quot;,sans-serif;color:#073763"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;font-family:&quot;Tr=
ebuchet MS&quot;,sans-serif;color:#073763">Thanks for taking my comments in=
to consideration. Focusing on the open points...&nbsp;<o:p></o:p></span></p=
>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
<blockquote style=3D"border:none;border-left:solid #CCCCCC 1.0pt;padding:0i=
n 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in">
<div>
<div>
<div>
<div>
<div id=3D"gmail-m_5250262316037836265gmail-:2232">
<div id=3D"gmail-m_5250262316037836265gmail-:h4y0">
<div>
<div>
<div>
<div style=3D"margin-top:6.0pt;font-size:0.875rem" id=3D"gmail-m_5250262316=
037836265gmail-:o2kj">
<div id=3D"gmail-m_5250262316037836265gmail-:o2ki">
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto;margin-left:94.5pt">
<span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;,serif;c=
olor:#333333;letter-spacing:.25pt">o</span><span style=3D"font-size:7.0pt;f=
ont-family:&quot;Times New Roman&quot;,serif;color:#333333;letter-spacing:.=
25pt">&nbsp;&nbsp;
</span><span style=3D"font-size:12.0pt;font-family:&quot;Trebuchet MS&quot;=
,sans-serif;color:#333333;letter-spacing:.25pt">Something that I find missi=
ng in the document is that the network controller could be a valuable sourc=
e of network telemetry as well. Consider a PCE,
 the&nbsp;controller could be a source of network-wide data, such as the as=
sociation between network paths, cumulative network metrics, global network=
 utilization, etc. The document is currently very network-device-specific (=
as a data source). My suggestion would
 be to handle the centralized controller either as a separate section or pa=
rt of the control plane and management plane telemetry.</span><o:p></o:p></=
p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"letter-spacing:.25pt">[HS] We hold a view on a tele=
metry system that it collects data from different network planes, in which =
a centralized controller, if exists,&nbsp;
 is the host for the telemetry&nbsp; applications and a consumer for the da=
ta. In a sense, a controller acquires the original data from various networ=
k planes and it might further process the data and even generate new data b=
ased on telemetry data for applications.
 We summarize this process as &#8220;network operation applications&#8221; =
in the framework. Is this an acceptable view?</span><o:p></o:p></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;font-family:&quot;Tr=
ebuchet MS&quot;,sans-serif;color:#073763">Dhruv: In most cases that could =
be true. I do find it limiting to assume all such applications are hosted a=
t a single central controller. Looking at figure
 3 in RFC 8309 -&nbsp;<a href=3D"https://nam11.safelinks.protection.outlook=
.com/?url=3Dhttps%3A%2F%2Fwww.rfc-editor.org%2Frfc%2Frfc8309.html%23section=
-4&amp;data=3D04%7C01%7Chaoyu.song%40futurewei.com%7Cf87d7c629ea14c2188ee08=
d9ad6fbced%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C637731517699454988%=
7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWw=
iLCJXVCI6Mn0%3D%7C3000&amp;sdata=3DphgAdnLv9stOKAz5kQq0Kxq5Ga30Ik5cVd1V9rh5=
fV8%3D&amp;reserved=3D0">https://www.rfc-editor.org/rfc/rfc8309.html#sectio=
n-4</a>,
 it is possible that the bottom controller does the telemetry handling but =
the analysis and application happen at the orchestrator level.&nbsp;<o:p></=
o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;font-family:&quot;Tr=
ebuchet MS&quot;,sans-serif;color:#073763"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;font-family:&quot;Tr=
ebuchet MS&quot;,sans-serif;color:#073763">Anyways, maybe you could add som=
e version of the below text -&nbsp;&nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;font-family:&quot;Tr=
ebuchet MS&quot;,sans-serif;color:#073763"><o:p>&nbsp;</o:p></span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #CCCCCC 1.0pt;padding:0i=
n 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in">
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Courier New&quot;,s=
erif">Note that in some cases the controller itself may be the source of te=
lemetry data that is unique to it or derived from the telemetry data collec=
ted from the network elements. Some of the principles
 and taxonomy specific to the control plane and management plane telemetry =
could also be applied to the controller when it is required to provide the =
telemetry data to Network Operation Applications hosted outside. The scope =
of the document is focused on the
 network elements telemetry and further details related to controllers are =
thus out of scope.
</span><o:p></o:p></p>
</blockquote>
<div>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
</div>
<blockquote style=3D"border:none;border-left:solid #CCCCCC 1.0pt;padding:0i=
n 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in">
<div>
<div>
<div>
<div>
<div id=3D"gmail-m_5250262316037836265gmail-:2232">
<div id=3D"gmail-m_5250262316037836265gmail-:h4y0">
<div>
<div>
<div>
<div style=3D"margin-top:6.0pt;font-size:0.875rem" id=3D"gmail-m_5250262316=
037836265gmail-:o2kj">
<div id=3D"gmail-m_5250262316037836265gmail-:o2ki">
<div>
<div>
<p class=3D"MsoNormal" style=3D"margin-top:3.0pt;mso-margin-bottom-alt:auto=
;margin-left:94.5pt">
<span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;,serif;c=
olor:#333333;letter-spacing:.25pt">o</span><span style=3D"font-size:7.0pt;f=
ont-family:&quot;Times New Roman&quot;,serif;color:#333333;letter-spacing:.=
25pt">&nbsp;&nbsp;
</span><span style=3D"font-size:12.0pt;font-family:&quot;Trebuchet MS&quot;=
,sans-serif;color:#333333;letter-spacing:.25pt">Something else that I find =
missing is the multi-domain aspects. You could mark it as out of scope or b=
etter yet do talk about it how there could possibly
 be a hierarchy and recursive nature in your framework to handle multi-doma=
in. Currently, it is mentioned in passing while describing data fusion in s=
ection 3.4.</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-top:3.0pt;mso-margin-bottom-alt:auto=
"><span style=3D"letter-spacing:.25pt">[HS] Multi-domain has many particula=
r issues we think we should leave out of scope, although the general framew=
ork would still fit. We will make it clear
 in the new revision.&nbsp;</span><o:p></o:p></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;font-family:&quot;Tr=
ebuchet MS&quot;,sans-serif;color:#073763">Dhruv: Looking forward to the te=
xt!
<o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
</div>
<blockquote style=3D"border:none;border-left:solid #CCCCCC 1.0pt;padding:0i=
n 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in">
<div>
<div>
<div>
<div>
<div id=3D"gmail-m_5250262316037836265gmail-:2232">
<div id=3D"gmail-m_5250262316037836265gmail-:h4y0">
<div>
<div>
<div>
<div style=3D"margin-top:6.0pt;font-size:0.875rem" id=3D"gmail-m_5250262316=
037836265gmail-:o2kj">
<div id=3D"gmail-m_5250262316037836265gmail-:o2ki">
<div>
<div>
<p class=3D"MsoNormal" style=3D"margin-top:3.0pt;mso-margin-bottom-alt:auto=
;margin-left:47.25pt">
<span style=3D"font-size:10.0pt;font-family:Symbol;color:#333333;letter-spa=
cing:.25pt">&middot;</span><span style=3D"font-size:7.0pt;font-family:&quot=
;Times New Roman&quot;,serif;color:#333333;letter-spacing:.25pt">
</span><span style=3D"font-size:12.0pt;font-family:&quot;Trebuchet MS&quot;=
,sans-serif;color:#333333;letter-spacing:.25pt">Query</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto;margin-left:94.5pt">
<span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;,serif;c=
olor:#333333;letter-spacing:.25pt">o</span><span style=3D"font-size:7.0pt;f=
ont-family:&quot;Times New Roman&quot;,serif;color:#333333;letter-spacing:.=
25pt">&nbsp;&nbsp;
</span><span style=3D"font-size:12.0pt;font-family:&quot;Trebuchet MS&quot;=
,sans-serif;color:#333333;letter-spacing:.25pt">Section 4.1</span><o:p></o:=
p></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto;margin-left:141.75pt">
<span style=3D"font-size:10.0pt;font-family:Wingdings;color:#333333;letter-=
spacing:.25pt">&sect;</span><span style=3D"font-size:7.0pt;font-family:&quo=
t;Times New Roman&quot;,serif;color:#333333;letter-spacing:.25pt">&nbsp;
</span><span style=3D"font-size:12.0pt;font-family:&quot;Trebuchet MS&quot;=
,sans-serif;color:#333333;letter-spacing:.25pt">In figure 2, why MIB is men=
tioned in the management plane only, why not control plane when various con=
trol plane protocols have MIBs? Similarly, there
 are forwarding statistics MIB that might work in the forwarding plane? Als=
o, add SNMP and ASN.1(?) in the table corresponding to MIB.</span><o:p></o:=
p></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"letter-spacing:.25pt">[HS] In the text we &#8220;no=
te that the&nbsp; selected techniques [in the figure] just reflect the de f=
acto state of the art and are by no means exhaustive.&#8221;
 Here we only mean to provide some representatives in each category.</span>=
<o:p></o:p></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;font-family:&quot;Tr=
ebuchet MS&quot;,sans-serif;color:#073763">Dhruv: I understand that, it sto=
od out to me because YANG was mentioned in other planes but not MIB.
<o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;font-family:&quot;Tr=
ebuchet MS&quot;,sans-serif;color:#073763">Thanks!&nbsp;<o:p></o:p></span><=
/p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;font-family:&quot;Tr=
ebuchet MS&quot;,sans-serif;color:#073763">Dhruv<o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
</div>
</div>
</div>
</div>
</body>
</html>

--_000_BY3PR13MB47874BB1A79516878E30750E9A9F9BY3PR13MB4787namp_--


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From: Alexander Vainshtein <Alexander.Vainshtein@rbbn.com>
To: "rtg-ads@ietf.org" <rtg-ads@ietf.org>
CC: "rtg-dir@ietf.org" <rtg-dir@ietf.org>, "draft-ietf-bess-srv6-services.all@ietf.org" <draft-ietf-bess-srv6-services.all@ietf.org>, "bess@ietf.org" <bess@ietf.org>, "last-call@ietf.org" <last-call@ietf.org>, "Luc Andre Burdet (lburdet)" <lburdet@cisco.com>
Thread-Topic: RtgDir Last Call review: draft-ietf-bess-srv6-services-08
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Date: Tue, 23 Nov 2021 17:28:38 +0000
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From: Ketan Talaulikar <ketant.ietf@gmail.com>
Date: Wed, 24 Nov 2021 07:47:41 +0530
Message-ID: <CAH6gdPxwWYoJRiKf7e1Cn9cm7n3+tOvGrVw+FsMPzTnm==Umqg@mail.gmail.com>
To: Alexander Vainshtein <Alexander.Vainshtein@rbbn.com>
Cc: "rtg-ads@ietf.org" <rtg-ads@ietf.org>, "rtg-dir@ietf.org" <rtg-dir@ietf.org>,  "draft-ietf-bess-srv6-services.all@ietf.org" <draft-ietf-bess-srv6-services.all@ietf.org>,  "bess@ietf.org" <bess@ietf.org>, "last-call@ietf.org" <last-call@ietf.org>,  "Luc Andre Burdet (lburdet)" <lburdet@cisco.com>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/rtg-dir/VpqYyPfz9C8GprHl5X4sth0kO8E>
Subject: Re: [RTG-DIR] RtgDir Last Call review: draft-ietf-bess-srv6-services-08
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Hi Sasha,

Thanks for your review and your help with improving it as part of your
previous review.

Thanks,
Ketan


On Tue, 23 Nov 2021 at 23:18, Alexander Vainshtein <
Alexander.Vainshtein@rbbn.com> wrote:

> Hello,
>
> I have been selected as the Routing Directorate reviewer for this draft.
> The Routing Directorate seeks to review all routing or routing-related
> drafts as they pass through IETF last call and IESG review, and sometimes
> on special request. The purpose of the review is to provide assistance to
> the Routing ADs. For more information about the Routing Directorate, plea=
se
> see =E2=80=8Bhttp://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir
> <http://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir>
>
> Although these comments are primarily for the use of the Routing ADs, it
> would be helpful if you could consider them along with any other IETF Las=
t
> Call comments that you receive, and strive to resolve them through
> discussion or by updating the draft.
>
> Document:  draft-ietf-bess-srv6-services-08
> <https://datatracker.ietf.org/doc/html/draft-ietf-bess-srv6-services>
> Reviewer: Alexander (=E2=80=9CSasha=E2=80=9D) Vainshtein
> Review Date: 23-Nov-21
> IETF LC End Date: 24-Nov-21
> Intended Status: Standards Track
>
> *Summary: *No issues found. This document is ready for publication.
>
> *Comments*:
>
> I have reviewed the -05 version of the draft ~10 months ago. I have then
> found some minor issues with the draft that have been discussed with the
> authors and successfully resolved in the -06 and -07 versions of the draf=
t.
> I have  therefore reviewed changes between the -07 and -08 version (mainl=
y
> editorial) and did not find any new issues.
>
> I would like to thank (again) the authors for their responsiveness and
> cooperation.
>
>
>
> *Major Issues*:  Not found.
>
>
>
> *Minor Issues*:  Not found.
>
>
>
> Hopefully this review will be useful.
>
>
>
> Regards,
>
> Sasha
>
>
>
> Office: +972-39266302
>
> Cell:      +972-549266302
>
> Email:   Alexander.Vainshtein@rbbn.com
>
>
>
> Notice: This e-mail together with any attachments may contain information
> of Ribbon Communications Inc. and its Affiliates that is confidential
> and/or proprietary for the sole use of the intended recipient. Any review=
,
> disclosure, reliance or distribution by others or forwarding without
> express permission is strictly prohibited. If you are not the intended
> recipient, please notify the sender immediately and then delete all copie=
s,
> including any attachments.
>

--00000000000014991105d17f77f2
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Hi Sasha,<div><br></div><div>Thanks for your review and yo=
ur help with improving it as part of your previous review.</div><div><br></=
div><div>Thanks,</div><div>Ketan</div><div><br></div></div><br><div class=
=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Tue, 23 Nov 2021 =
at 23:18, Alexander Vainshtein &lt;<a href=3D"mailto:Alexander.Vainshtein@r=
bbn.com">Alexander.Vainshtein@rbbn.com</a>&gt; wrote:<br></div><blockquote =
class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px sol=
id rgb(204,204,204);padding-left:1ex">





<div lang=3D"EN-US" style=3D"overflow-wrap: break-word;">
<div class=3D"gmail-m_-5874182755325766617WordSection1">
<p style=3D"background:white"><span style=3D"font-size:10pt;font-family:Ver=
dana,sans-serif;color:black">Hello,<u></u><u></u></span></p>
<p style=3D"background:white;font-variant-ligatures:normal;font-variant-cap=
s:normal;text-align:start;text-decoration-style:initial;text-decoration-col=
or:initial;word-spacing:0px">
<span style=3D"font-size:10pt;font-family:Verdana,sans-serif;color:black">I=
 have been selected as the Routing Directorate reviewer for this draft. The=
 Routing Directorate seeks to review all routing or routing-related drafts =
as they pass through IETF last
 call and IESG review, and sometimes on special request. The purpose of the=
 review is to provide assistance to the Routing ADs. For more information a=
bout the Routing Directorate, please see=C2=A0<a href=3D"http://trac.tools.=
ietf.org/area/rtg/trac/wiki/RtgDir" target=3D"_blank"><span class=3D"gmail-=
m_-5874182755325766617icon"><span style=3D"font-family:Arial,sans-serif;col=
or:rgb(187,0,0);text-decoration:none">=E2=80=8B</span></span><span style=3D=
"color:rgb(187,0,0)">http://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir</=
span></a><u></u><u></u></span></p>
<p style=3D"background:white;font-variant-ligatures:normal;font-variant-cap=
s:normal;text-align:start;text-decoration-style:initial;text-decoration-col=
or:initial;word-spacing:0px">
<span style=3D"font-size:10pt;font-family:Verdana,sans-serif;color:black">A=
lthough these comments are primarily for the use of the Routing ADs, it wou=
ld be helpful if you could consider them along with any other IETF Last Cal=
l comments that you receive, and
 strive to resolve them through discussion or by updating the draft.<u></u>=
<u></u></span></p>
<p style=3D"background:white;font-variant-ligatures:normal;font-variant-cap=
s:normal;text-align:start;text-decoration-style:initial;text-decoration-col=
or:initial;word-spacing:0px">
<span style=3D"font-size:10pt;font-family:Verdana,sans-serif;color:black">D=
ocument: =C2=A0<a href=3D"https://datatracker.ietf.org/doc/html/draft-ietf-=
bess-srv6-services" target=3D"_blank">draft-ietf-bess-srv6-services-08</a><=
br>
Reviewer: Alexander (=E2=80=9CSasha=E2=80=9D) Vainshtein<br>
Review Date: 23-Nov-21<br>
IETF LC End Date: 24-Nov-21<br>
Intended Status: Standards Track<u></u><u></u></span></p>
<p style=3D"background:white;font-variant-ligatures:normal;font-variant-cap=
s:normal;text-align:start;text-decoration-style:initial;text-decoration-col=
or:initial;word-spacing:0px">
<strong><span style=3D"font-size:10pt;font-family:Verdana,sans-serif;color:=
black">Summary:
</span></strong><span style=3D"font-size:10pt;font-family:Verdana,sans-seri=
f;color:black">No issues found. This document is ready for publication.<u><=
/u><u></u></span></p>
<p class=3D"MsoNormal"><strong><span style=3D"font-size:10pt;font-family:Ve=
rdana,sans-serif;color:black;background:white">Comments</span></strong>:<u>=
</u><u></u></p>
<p class=3D"MsoNormal">I have reviewed the -05 version of the draft ~10 mon=
ths ago. I have then found some minor issues with the draft that have been =
discussed with the authors and successfully resolved in the -06 and -07 ver=
sions of the draft. I have =C2=A0therefore
 reviewed changes between the -07 and -08 version (mainly editorial) and di=
d not find any new issues.<u></u><u></u></p>
<p class=3D"MsoNormal">I would like to thank (again) the authors for their =
responsiveness and cooperation.<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal"><b>Major Issues</b>:=C2=A0 Not found.<u></u><u></u><=
/p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal"><b>Minor Issues</b>:=C2=A0 Not found.<u></u><u></u><=
/p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">Hopefully this review will be useful.<u></u><u></u><=
/p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">Regards,<u></u><u></u></p>
<p class=3D"MsoNormal">Sasha<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">Office: +972-39266302<u></u><u></u></p>
<p class=3D"MsoNormal">Cell:=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 +972-549266302<u=
></u><u></u></p>
<p class=3D"MsoNormal">Email:=C2=A0=C2=A0 <a href=3D"mailto:Alexander.Vains=
htein@rbbn.com" target=3D"_blank">Alexander.Vainshtein@rbbn.com</a><u></u><=
u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<br clear=3D"both">
Notice: This e-mail together with any attachments may contain information o=
f Ribbon Communications Inc. and its Affiliates that is confidential and/or=
 proprietary for the sole use of the intended recipient. Any review, disclo=
sure, reliance or distribution by others or forwarding without express perm=
ission is strictly prohibited. If you are not the intended recipient, pleas=
e notify the sender immediately and then delete all copies, including any a=
ttachments.<br>
</div>


</blockquote></div>

--00000000000014991105d17f77f2--


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Date: Thu, 25 Nov 2021 12:03:56 -0800
Archived-At: <https://mailarchive.ietf.org/arch/msg/rtg-dir/qDrR4JHPLl3-HtIdd7h68aW1X1Q>
Subject: [RTG-DIR] Rtgdir last call review of draft-ietf-lsr-isis-flood-reflection-05
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Reviewer: Michael Richardson
Review result: Has Issues

Subject: RtgDir Last Call review: draft-ietf-lsr-isis-flood-reflection-05

Hello,

I have been selected as the Routing Directorate reviewer for this draft. The
Routing Directorate seeks to review all routing or routing-related drafts as
they pass through IETF last call and IESG review, and sometimes on special
request. The purpose of the review is to provide assistance to the Routing
ADs. For more information about the Routing Directorate, please see
​http://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir

Although these comments are primarily for the use of the Routing ADs, it
would be helpful if you could consider them along with any other IETF Last
Call comments that you receive, and strive to resolve them through discussion
or by updating the draft.

Document: draft-ietf-lsr-isis-flood-reflection-05
Reviewer: Michael Richardson
Review Date: 2021-11-25
IETF LC End Date: 2021-12-17
Intended Status: Standards Track

Summary:

This document is basically ready for publication but has nits that should be
considered prior to publication.

(As a person with little ISIS knowledge, but BGP experience, I was able to pick
things up. Good Job!)

Comments:

The use of _L1_/_L2_ is an ISIS terminology, which goes back to RFC1195, I
found. Any reader who is not intimate with ISIS won't know this terminology,
which in RFC1195 is "Level 1" and "Level 2", so please add this to the
glossary, and/or reference 1195.

Major Issues:

No major issues found.

Minor Issues:

I prefer to have the Introduction tell me something about the problem space
before the Glossary floods (pun intended) me with terms, but perhaps document
structure is different in LSR.

Please label the diagram better:
      Figure 1: _Example Topology_
      -> _Example Topology of attempt to extend L2 with L1_

or something like that.  I think it's the thing that doesn't work.
Have you tried running goat on this diagram?  Would look nice in SVG.

Figure 3 does nothave an R22, but it is mentioned in the paragraph on page 6.

Section 4: there are only three bytes in the first line. This is surprising.
        Same in section 5. Maybe something about ISIS stuff I don't know.
   I would have put sections 4,5,6,7 into a Section "Protocol Extensions", but
   that's just me.

Section 9: what happens if the MUSTs on Cluster ID are violated?
        What is the defensive situation?  Does this force flag days?

On the whole, I wonder if this draft hasn't really created an "L3" area, and
calling it that might lead to a clearer situation.

I'm not sure that I agree with _Security Considerations_.
If there are tunnels everywhere in this core, doesn't this present new
opportunities to impersonate devices?

Nits:

I found no obvious nits




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From: Antoni Przygienda <prz@juniper.net>
To: Michael Richardson <mcr+ietf@sandelman.ca>, "rtg-dir@ietf.org" <rtg-dir@ietf.org>
CC: "draft-ietf-lsr-isis-flood-reflection.all@ietf.org" <draft-ietf-lsr-isis-flood-reflection.all@ietf.org>, "last-call@ietf.org" <last-call@ietf.org>, "lsr@ietf.org" <lsr@ietf.org>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/rtg-dir/vpJVhCw5t8ukz6Rux-M9UfN97OA>
Subject: Re: [RTG-DIR] Rtgdir last call review of draft-ietf-lsr-isis-flood-reflection-05
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