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From: "Peter Yee" <peter@akayla.com>
To: "'Acee Lindem \(acee\)'" <acee@cisco.com>, <gen-art@ietf.org>
Cc: <idr@ietf.org>, <ietf@ietf.org>, <draft-ietf-idr-bgp-prefix-sid.all@ietf.org>
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Date: Thu, 1 Feb 2018 10:30:37 -0800
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Subject: Re: [Idr] Genart last call review of draft-ietf-idr-bgp-prefix-sid-10
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Acee,
	Thanks for the quick response.=20

>>    Change "extendibility" to "extensibility" throughout the document.

>No - see https://www.merriam-webster.com/dictionary/extendibility

Yeah, I looked over various dictionaries for that word.  Extensibility =
seemed to be more popular and in some dictionaries closer to what you =
meant, but either will work.

>>    Page 4, Section 1, 4th paragraph, 1st sentence: delete the comma.

>I'm not sure exactly which comma you are referring to but I believe the =
punctuation is correct before "reducing".

That should have been Page 3.  Typo on my part.

	I appreciate you addressing my comments (tardy as they were).

		-Peter

-----Original Message-----
From: Acee Lindem (acee) [mailto:acee@cisco.com]=20
Sent: Wednesday, January 31, 2018 3:02 PM
To: Peter Yee; gen-art@ietf.org
Cc: idr@ietf.org; ietf@ietf.org; =
draft-ietf-idr-bgp-prefix-sid.all@ietf.org
Subject: Re: Genart last call review of draft-ietf-idr-bgp-prefix-sid-10

Hi Peter,=20

Thanks for the review, please see inline.

=EF=BB=BFOn 1/31/18, 2:44 PM, "Peter Yee" <peter@akayla.com> wrote:

    Reviewer: Peter Yee
    Review result: Ready with Nits
   =20
    I am the assigned Gen-ART reviewer for this draft. The General Area
    Review Team (Gen-ART) reviews all IETF documents being processed
    by the IESG for the IETF Chair.  Please treat these comments just
    like any other last call comments.
   =20
    For more information, please see the FAQ at
   =20
    <https://trac.ietf.org/trac/gen/wiki/GenArtfaq>.
   =20
    Document: draft-ietf-idr-bgp-prefix-sid-10
    Reviewer: Peter Yee
    Review Date: 2018-01-31
    IETF LC End Date: 2018-01-26
    IESG Telechat date: 2018-02-08
   =20
    Summary: This draft specifies an optional BGP attribute for use with =
Segment
    Routing.  It's well written and reable, although I make no claims to =
being an
    expert in this area.  The draft is ready for publication but has =
some nits that
    should be fixed (really nothing major).
   =20
    Major issues:
   =20
    Minor issues:
   =20
    Nits/editorial comments:
   =20
    General:
   =20
    Change "extendibility" to "extensibility" throughout the document.

No - see https://www.merriam-webster.com/dictionary/extendibility
   =20
    Change "First Come, First Served" (with varying hyphenation) to =
simply
    "first-come, first-served" in a few places.  Meaning making it lower =
case and
    hyphenate consistently.

I've made this consistent with IANA terminology.

   =20
    Specific.
   =20
    Page 3, Section 1, 1st paragraph, 2nd sentence: change the colon to =
a comma.

Fixed.
   =20
    Page 3, Section 1, 3rd paragraph, 1st sentence: append comma after =
the close
    parenthesis, "label", and "Dataplane".

Fixed.
   =20
    Page 4, Section 1, 4th paragraph, 1st sentence: delete the comma.

I'm not sure exactly which comma you are referring to but I believe the =
punctuation is correct before "reducing".=20

   =20
    Page 4, Section 1, 4th paragraph, last sentence: consider making =
"Segment"
    lower case for consistency with previous usage.

Fixed.
   =20
    Page 4, Section 2.1, 2nd indented paragraph, 2nd sentence: change =
"to use" to
    "using".

Changed=20
   =20
    Page 7, Section 3.2, 1st paragraph, 2nd sentence: should the uses of =
"will be"
    throughout the document be changed to "MUST"?

I've consistently used MUST throughout.=20
   =20
    Page 8, 2nd bullet item (Length): insert "a" before "multiple".

I've put it in parenthesis.=20
   =20
    Page 9, Section 4, 1st sentence: delete the comma.
   =20
Fixed.

    Page 9, Section 4.1, 3rd paragraph, 1st sentence: delete "as".

Reworded.
   =20
    Page 10, Section 4.2, 1st paragraph, 2nd sentence: delete the first =
"the".

Fixed.
   =20
    Page 12, 1st paragraph, 2nd sentence: change "Similarily" to =
"Similarly".

Fixed.
   =20
    Page 12, Section 7, 1st paragraph, 2nd sentence: insert "to" before =
the first
    "the".

Fixed.=20

Thanks,
Acee

   =20
   =20



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From: "Acee Lindem (acee)" <acee@cisco.com>
To: Peter Yee <peter@akayla.com>, "gen-art@ietf.org" <gen-art@ietf.org>
CC: "idr@ietf.org" <idr@ietf.org>, "ietf@ietf.org" <ietf@ietf.org>, "draft-ietf-idr-bgp-prefix-sid.all@ietf.org" <draft-ietf-idr-bgp-prefix-sid.all@ietf.org>
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From nobody Thu Feb  1 22:47:41 2018
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Subject: [Idr] Genart telechat review of draft-ietf-idr-bgp-prefix-sid-11
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Reviewer: Peter Yee
Review result: Ready

I am the assigned Gen-ART reviewer for this draft. The General Area
Review Team (Gen-ART) reviews all IETF documents being processed
by the IESG for the IETF Chair. Please wait for direction from your
document shepherd or AD before posting a new version of the draft.

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<https://trac.ietf.org/trac/gen/wiki/GenArtfaq>.

Document: draft-ietf-idr-bgp-prefix-sid-11
Reviewer: Peter Yee
Review Date: 2018-02-01
IETF LC End Date: 2018-01-26
IESG Telechat date: 2018-02-08

Summary:  This update incorporates most of the changes I noted for the -10
draft and is ready for publication.

Major issues:

Minor issues:

Nits/editorial comments:

Okay, maybe spell my surname correctly. ;-)


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From nobody Sun Feb  4 14:30:44 2018
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Inter-Domain Routing WG of the IETF.

        Title           : Segment Routing Prefix SID extensions for BGP
        Authors         : Stefano Previdi
                          Clarence Filsfils
                          Acee Lindem
                          Arjun Sreekantiah
                          Hannes Gredler
	Filename        : draft-ietf-idr-bgp-prefix-sid-12.txt
	Pages           : 17
	Date            : 2018-02-04

Abstract:
   Segment Routing (SR) architecture allows a node to steer a packet
   flow through any topological path and service chain by leveraging
   source routing.  The ingress node prepends an SR header to a packet
   containing a set of segment identifiers (SID).  Each SID represents a
   topological or a service-based instruction.  Per-flow state is
   maintained only on the ingress node of the SR domain.

   This document defines an optional, transitive BGP attribute for
   announcing BGP Prefix Segment Identifiers (BGP Prefix-SID)
   information.



The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-idr-bgp-prefix-sid/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-idr-bgp-prefix-sid-12
https://datatracker.ietf.org/doc/html/draft-ietf-idr-bgp-prefix-sid-12

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-idr-bgp-prefix-sid-12


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until the htmlized version and diff are available at tools.ietf.org.

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ftp://ftp.ietf.org/internet-drafts/


From nobody Mon Feb  5 05:20:15 2018
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Mirja Kühlewind has entered the following ballot position for
draft-ietf-idr-bgp-prefix-sid-12: No Objection

When responding, please keep the subject line intact and reply to all
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----------------------------------------------------------------------
COMMENT:
----------------------------------------------------------------------

Minor commets:

1) Maybe spell out NLRI on first occurrence (sec 2).

2) Given there are currently no flags defined, wouldn't it be sufficient to use
the 8-bit reserved field for flags? Also do you really want to create an empty
registry on a first-come first-serve basis for the flags now? Have there been
any use cases discussed already? Is it likely that assignments will be made
soon and is first-com first-serve the right policy for these expected
assignments? Note that such registries can also be created at a later point
when really needed.



From nobody Mon Feb  5 08:23:27 2018
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From: Alexey Melnikov <aamelnikov@fastmail.fm>
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Cc: draft-ietf-idr-bgp-prefix-sid@ietf.org, Susan Hares <shares@ndzh.com>, aretana.ietf@gmail.com, idr-chairs@ietf.org, shares@ndzh.com, idr@ietf.org
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Subject: [Idr] Alexey Melnikov's No Objection on draft-ietf-idr-bgp-prefix-sid-12: (with COMMENT)
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Alexey Melnikov has entered the following ballot position for
draft-ietf-idr-bgp-prefix-sid-12: No Objection

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

I tend to agree with Mirja that you either don't currently need registry for
flags or need it with a stricter policy than First Come First Served.

Nits:

4.  Receiving BGP Prefix-SID Attribute

   A BGP speaker receiving a BGP Prefix-SID attribute from an EBGP
   neighbor residing outside the boundaries of the SR domain MUST
   discard the attribute unless it is configured to accept the attribute
   from the EBGP neighbor.  A BGP speaker MAY log an error for further
   analysis when discarding an attribute.

Is there any reason why logging is just MAY? This would help big time in
debugging issues. You are also using "SHOULD log" in other places in the
document. So I suggest:

MAY log an error ==> SHOULD log an error

(Actually "MAY log" appears twice in the document)

I suggest you use a more common "extensibility" instead of "extendibility", but
maybe this is just me :-).



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To: Alexey Melnikov <aamelnikov@fastmail.fm>, The IESG <iesg@ietf.org>
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Subject: [Idr] I-D Action: draft-ietf-idr-bgp-prefix-sid-13.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Inter-Domain Routing WG of the IETF.

        Title           : Segment Routing Prefix SID extensions for BGP
        Authors         : Stefano Previdi
                          Clarence Filsfils
                          Acee Lindem
                          Arjun Sreekantiah
                          Hannes Gredler
	Filename        : draft-ietf-idr-bgp-prefix-sid-13.txt
	Pages           : 17
	Date            : 2018-02-05

Abstract:
   Segment Routing (SR) architecture allows a node to steer a packet
   flow through any topological path and service chain by leveraging
   source routing.  The ingress node prepends an SR header to a packet
   containing a set of segment identifiers (SID).  Each SID represents a
   topological or a service-based instruction.  Per-flow state is
   maintained only on the ingress node of the SR domain.

   This document defines an optional, transitive BGP attribute for
   announcing BGP Prefix Segment Identifiers (BGP Prefix-SID)
   information.



The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-idr-bgp-prefix-sid/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-idr-bgp-prefix-sid-13
https://datatracker.ietf.org/doc/html/draft-ietf-idr-bgp-prefix-sid-13

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-idr-bgp-prefix-sid-13


Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/


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From nobody Tue Feb  6 13:09:26 2018
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Cc: draft-ietf-idr-bgp-prefix-sid@ietf.org, Susan Hares <shares@ndzh.com>, aretana.ietf@gmail.com, idr-chairs@ietf.org, shares@ndzh.com, idr@ietf.org
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Subject: [Idr] Alissa Cooper's No Objection on draft-ietf-idr-bgp-prefix-sid-13: (with COMMENT)
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Alissa Cooper has entered the following ballot position for
draft-ietf-idr-bgp-prefix-sid-13: No Objection

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email addresses included in the To and CC lines. (Feel free to cut this
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----------------------------------------------------------------------
COMMENT:
----------------------------------------------------------------------

Is there a different, less controversial example that could be given in the
first paragraph of the document than "pass through deep packet inspection"?



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From: Alissa Cooper <alissa@cooperw.in>
In-Reply-To: <2B684B7E-1656-467B-A3A1-99EB99A1186E@cisco.com>
Date: Tue, 6 Feb 2018 16:10:57 -0500
Cc: "gen-art@ietf.org" <gen-art@ietf.org>, "idr@ietf.org" <idr@ietf.org>, "draft-ietf-idr-bgp-prefix-sid.all@ietf.org" <draft-ietf-idr-bgp-prefix-sid.all@ietf.org>
Message-Id: <03ADE50B-DD21-491F-9B5B-89ABBA851F1C@cooperw.in>
References: <151755405450.25785.9657751321155804044@ietfa.amsl.com> <2B684B7E-1656-467B-A3A1-99EB99A1186E@cisco.com>
To: "Acee Lindem (acee)" <acee@cisco.com>, Peter Yee <peter@akayla.com>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/idr/2DMG9ONl2nI7Z4UjSyDxhB7lOHo>
Subject: Re: [Idr] [Gen-art] Genart telechat review of draft-ietf-idr-bgp-prefix-sid-11
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Peter, thanks for your reviews of this document. Acee, thanks for your =
responses. I have entered a No Objection ballot.

Alissa


> On Feb 2, 2018, at 8:14 AM, Acee Lindem (acee) <acee@cisco.com> wrote:
>=20
> Hi Peter,=20
>=20
> =EF=BB=BFOn 2/2/18, 1:47 AM, "Peter Yee" <peter@akayla.com =
<mailto:peter@akayla.com>> wrote:
>=20
>    Reviewer: Peter Yee
>    Review result: Ready
>=20
>    I am the assigned Gen-ART reviewer for this draft. The General Area
>    Review Team (Gen-ART) reviews all IETF documents being processed
>    by the IESG for the IETF Chair. Please wait for direction from your
>    document shepherd or AD before posting a new version of the draft.
>=20
>    For more information, please see the FAQ at
>=20
>    <https://trac.ietf.org/trac/gen/wiki/GenArtfaq>.
>=20
>    Document: draft-ietf-idr-bgp-prefix-sid-11
>    Reviewer: Peter Yee
>    Review Date: 2018-02-01
>    IETF LC End Date: 2018-01-26
>    IESG Telechat date: 2018-02-08
>=20
>    Summary:  This update incorporates most of the changes I noted for =
the -10
>    draft and is ready for publication.
>=20
>    Major issues:
>=20
>    Minor issues:
>=20
>    Nits/editorial comments:
>=20
>    Okay, maybe spell my surname correctly. ;-)
>=20
> This will be in the -11 version along with removal of the extra comma =
section 1 ;^)=20
>=20
> Thanks,
> Acee=20
>=20
>=20
>=20
> _______________________________________________
> Gen-art mailing list
> Gen-art@ietf.org <mailto:Gen-art@ietf.org>
> https://www.ietf.org/mailman/listinfo/gen-art =
<https://www.ietf.org/mailman/listinfo/gen-art>

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<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" =
class=3D""><div class=3D"">Peter, thanks for your reviews of this =
document. Acee, thanks for your responses. I have entered a No Objection =
ballot.</div><div class=3D""><br class=3D""></div><div =
class=3D"">Alissa</div><div class=3D""><br class=3D""></div><br =
class=3D""><div><blockquote type=3D"cite" class=3D""><div class=3D"">On =
Feb 2, 2018, at 8:14 AM, Acee Lindem (acee) &lt;<a =
href=3D"mailto:acee@cisco.com" class=3D"">acee@cisco.com</a>&gt; =
wrote:</div><br class=3D"Apple-interchange-newline"><div class=3D""><span =
style=3D"font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: normal; letter-spacing: normal; =
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-stroke-width: 0px; float: none; display: inline =
!important;" class=3D"">Hi Peter,<span =
class=3D"Apple-converted-space">&nbsp;</span></span><br =
style=3D"font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: normal; letter-spacing: normal; =
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-stroke-width: 0px;" class=3D""><br style=3D"font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant-caps: =
normal; font-weight: normal; letter-spacing: normal; orphans: auto; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: =
0px;" class=3D""><span style=3D"font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant-caps: normal; font-weight: normal; =
letter-spacing: normal; orphans: auto; text-align: start; text-indent: =
0px; text-transform: none; white-space: normal; widows: auto; =
word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display: =
inline !important;" class=3D"">=EF=BB=BFOn 2/2/18, 1:47 AM, "Peter Yee" =
&lt;</span><a href=3D"mailto:peter@akayla.com" style=3D"font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant-caps: =
normal; font-weight: normal; letter-spacing: normal; orphans: auto; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: =
0px;" class=3D"">peter@akayla.com</a><span style=3D"font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant-caps: =
normal; font-weight: normal; letter-spacing: normal; orphans: auto; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; =
float: none; display: inline !important;" class=3D"">&gt; =
wrote:</span><br style=3D"font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant-caps: normal; font-weight: normal; =
letter-spacing: normal; orphans: auto; text-align: start; text-indent: =
0px; text-transform: none; white-space: normal; widows: auto; =
word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=3D""><br =
style=3D"font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: normal; letter-spacing: normal; =
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-stroke-width: 0px;" class=3D""><span style=3D"font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant-caps: =
normal; font-weight: normal; letter-spacing: normal; orphans: auto; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; =
float: none; display: inline !important;" =
class=3D"">&nbsp;&nbsp;&nbsp;Reviewer: Peter Yee</span><br =
style=3D"font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: normal; letter-spacing: normal; =
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-stroke-width: 0px;" class=3D""><span style=3D"font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant-caps: =
normal; font-weight: normal; letter-spacing: normal; orphans: auto; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; =
float: none; display: inline !important;" =
class=3D"">&nbsp;&nbsp;&nbsp;Review result: Ready</span><br =
style=3D"font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: normal; letter-spacing: normal; =
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-stroke-width: 0px;" class=3D""><br style=3D"font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant-caps: =
normal; font-weight: normal; letter-spacing: normal; orphans: auto; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: =
0px;" class=3D""><span style=3D"font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant-caps: normal; font-weight: normal; =
letter-spacing: normal; orphans: auto; text-align: start; text-indent: =
0px; text-transform: none; white-space: normal; widows: auto; =
word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display: =
inline !important;" class=3D"">&nbsp;&nbsp;&nbsp;I am the assigned =
Gen-ART reviewer for this draft. The General Area</span><br =
style=3D"font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: normal; letter-spacing: normal; =
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-stroke-width: 0px;" class=3D""><span style=3D"font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant-caps: =
normal; font-weight: normal; letter-spacing: normal; orphans: auto; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; =
float: none; display: inline !important;" =
class=3D"">&nbsp;&nbsp;&nbsp;Review Team (Gen-ART) reviews all IETF =
documents being processed</span><br style=3D"font-family: Helvetica; =
font-size: 12px; font-style: normal; font-variant-caps: normal; =
font-weight: normal; letter-spacing: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" =
class=3D""><span style=3D"font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant-caps: normal; font-weight: normal; =
letter-spacing: normal; orphans: auto; text-align: start; text-indent: =
0px; text-transform: none; white-space: normal; widows: auto; =
word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display: =
inline !important;" class=3D"">&nbsp;&nbsp;&nbsp;by the IESG for the =
IETF Chair. Please wait for direction from your</span><br =
style=3D"font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: normal; letter-spacing: normal; =
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-stroke-width: 0px;" class=3D""><span style=3D"font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant-caps: =
normal; font-weight: normal; letter-spacing: normal; orphans: auto; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; =
float: none; display: inline !important;" =
class=3D"">&nbsp;&nbsp;&nbsp;document shepherd or AD before posting a =
new version of the draft.</span><br style=3D"font-family: Helvetica; =
font-size: 12px; font-style: normal; font-variant-caps: normal; =
font-weight: normal; letter-spacing: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" =
class=3D""><br style=3D"font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant-caps: normal; font-weight: normal; =
letter-spacing: normal; orphans: auto; text-align: start; text-indent: =
0px; text-transform: none; white-space: normal; widows: auto; =
word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=3D""><span =
style=3D"font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: normal; letter-spacing: normal; =
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-stroke-width: 0px; float: none; display: inline =
!important;" class=3D"">&nbsp;&nbsp;&nbsp;For more information, please =
see the FAQ at</span><br style=3D"font-family: Helvetica; font-size: =
12px; font-style: normal; font-variant-caps: normal; font-weight: =
normal; letter-spacing: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=3D""><br =
style=3D"font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: normal; letter-spacing: normal; =
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-stroke-width: 0px;" class=3D""><span style=3D"font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant-caps: =
normal; font-weight: normal; letter-spacing: normal; orphans: auto; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; =
float: none; display: inline !important;" =
class=3D"">&nbsp;&nbsp;&nbsp;&lt;<a =
href=3D"https://trac.ietf.org/trac/gen/wiki/GenArtfaq" =
class=3D"">https://trac.ietf.org/trac/gen/wiki/GenArtfaq</a>&gt;.</span><b=
r style=3D"font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: normal; letter-spacing: normal; =
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-stroke-width: 0px;" class=3D""><br style=3D"font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant-caps: =
normal; font-weight: normal; letter-spacing: normal; orphans: auto; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: =
0px;" class=3D""><span style=3D"font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant-caps: normal; font-weight: normal; =
letter-spacing: normal; orphans: auto; text-align: start; text-indent: =
0px; text-transform: none; white-space: normal; widows: auto; =
word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display: =
inline !important;" class=3D"">&nbsp;&nbsp;&nbsp;Document: =
draft-ietf-idr-bgp-prefix-sid-11</span><br style=3D"font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant-caps: =
normal; font-weight: normal; letter-spacing: normal; orphans: auto; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: =
0px;" class=3D""><span style=3D"font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant-caps: normal; font-weight: normal; =
letter-spacing: normal; orphans: auto; text-align: start; text-indent: =
0px; text-transform: none; white-space: normal; widows: auto; =
word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display: =
inline !important;" class=3D"">&nbsp;&nbsp;&nbsp;Reviewer: Peter =
Yee</span><br style=3D"font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant-caps: normal; font-weight: normal; =
letter-spacing: normal; orphans: auto; text-align: start; text-indent: =
0px; text-transform: none; white-space: normal; widows: auto; =
word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=3D""><span =
style=3D"font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: normal; letter-spacing: normal; =
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-stroke-width: 0px; float: none; display: inline =
!important;" class=3D"">&nbsp;&nbsp;&nbsp;Review Date: =
2018-02-01</span><br style=3D"font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant-caps: normal; font-weight: normal; =
letter-spacing: normal; orphans: auto; text-align: start; text-indent: =
0px; text-transform: none; white-space: normal; widows: auto; =
word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=3D""><span =
style=3D"font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: normal; letter-spacing: normal; =
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-stroke-width: 0px; float: none; display: inline =
!important;" class=3D"">&nbsp;&nbsp;&nbsp;IETF LC End Date: =
2018-01-26</span><br style=3D"font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant-caps: normal; font-weight: normal; =
letter-spacing: normal; orphans: auto; text-align: start; text-indent: =
0px; text-transform: none; white-space: normal; widows: auto; =
word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=3D""><span =
style=3D"font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: normal; letter-spacing: normal; =
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none; white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-stroke-width: 0px; float: none; display: inline =
!important;" class=3D"">&nbsp;&nbsp;&nbsp;IESG Telechat date: =
2018-02-08</span><br style=3D"font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant-caps: normal; font-weight: normal; =
letter-spacing: normal; orphans: auto; text-align: start; text-indent: =
0px; text-transform: none; white-space: normal; widows: auto; =
word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=3D""><br =
style=3D"font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: normal; letter-spacing: normal; =
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-stroke-width: 0px;" class=3D""><span style=3D"font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant-caps: =
normal; font-weight: normal; letter-spacing: normal; orphans: auto; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; =
float: none; display: inline !important;" =
class=3D"">&nbsp;&nbsp;&nbsp;Summary: &nbsp;This update incorporates =
most of the changes I noted for the -10</span><br style=3D"font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant-caps: =
normal; font-weight: normal; letter-spacing: normal; orphans: auto; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: =
0px;" class=3D""><span style=3D"font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant-caps: normal; font-weight: normal; =
letter-spacing: normal; orphans: auto; text-align: start; text-indent: =
0px; text-transform: none; white-space: normal; widows: auto; =
word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display: =
inline !important;" class=3D"">&nbsp;&nbsp;&nbsp;draft and is ready for =
publication.</span><br style=3D"font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant-caps: normal; font-weight: normal; =
letter-spacing: normal; orphans: auto; text-align: start; text-indent: =
0px; text-transform: none; white-space: normal; widows: auto; =
word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=3D""><br =
style=3D"font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: normal; letter-spacing: normal; =
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-stroke-width: 0px;" class=3D""><span style=3D"font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant-caps: =
normal; font-weight: normal; letter-spacing: normal; orphans: auto; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; =
float: none; display: inline !important;" =
class=3D"">&nbsp;&nbsp;&nbsp;Major issues:</span><br style=3D"font-family:=
 Helvetica; font-size: 12px; font-style: normal; font-variant-caps: =
normal; font-weight: normal; letter-spacing: normal; orphans: auto; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: =
0px;" class=3D""><br style=3D"font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant-caps: normal; font-weight: normal; =
letter-spacing: normal; orphans: auto; text-align: start; text-indent: =
0px; text-transform: none; white-space: normal; widows: auto; =
word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=3D""><span =
style=3D"font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: normal; letter-spacing: normal; =
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-stroke-width: 0px; float: none; display: inline =
!important;" class=3D"">&nbsp;&nbsp;&nbsp;Minor issues:</span><br =
style=3D"font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: normal; letter-spacing: normal; =
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-stroke-width: 0px;" class=3D""><br style=3D"font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant-caps: =
normal; font-weight: normal; letter-spacing: normal; orphans: auto; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: =
0px;" class=3D""><span style=3D"font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant-caps: normal; font-weight: normal; =
letter-spacing: normal; orphans: auto; text-align: start; text-indent: =
0px; text-transform: none; white-space: normal; widows: auto; =
word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display: =
inline !important;" class=3D"">&nbsp;&nbsp;&nbsp;Nits/editorial =
comments:</span><br style=3D"font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant-caps: normal; font-weight: normal; =
letter-spacing: normal; orphans: auto; text-align: start; text-indent: =
0px; text-transform: none; white-space: normal; widows: auto; =
word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=3D""><br =
style=3D"font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: normal; letter-spacing: normal; =
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-stroke-width: 0px;" class=3D""><span style=3D"font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant-caps: =
normal; font-weight: normal; letter-spacing: normal; orphans: auto; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; =
float: none; display: inline !important;" =
class=3D"">&nbsp;&nbsp;&nbsp;Okay, maybe spell my surname correctly. =
;-)</span><br style=3D"font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant-caps: normal; font-weight: normal; =
letter-spacing: normal; orphans: auto; text-align: start; text-indent: =
0px; text-transform: none; white-space: normal; widows: auto; =
word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=3D""><br =
style=3D"font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: normal; letter-spacing: normal; =
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-stroke-width: 0px;" class=3D""><span style=3D"font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant-caps: =
normal; font-weight: normal; letter-spacing: normal; orphans: auto; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; =
float: none; display: inline !important;" class=3D"">This will be in the =
-11 version along with removal of the extra comma section 1 ;^)<span =
class=3D"Apple-converted-space">&nbsp;</span></span><br =
style=3D"font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: normal; letter-spacing: normal; =
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-stroke-width: 0px;" class=3D""><br style=3D"font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant-caps: =
normal; font-weight: normal; letter-spacing: normal; orphans: auto; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: =
0px;" class=3D""><span style=3D"font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant-caps: normal; font-weight: normal; =
letter-spacing: normal; orphans: auto; text-align: start; text-indent: =
0px; text-transform: none; white-space: normal; widows: auto; =
word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display: =
inline !important;" class=3D"">Thanks,</span><br style=3D"font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant-caps: =
normal; font-weight: normal; letter-spacing: normal; orphans: auto; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: =
0px;" class=3D""><span style=3D"font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant-caps: normal; font-weight: normal; =
letter-spacing: normal; orphans: auto; text-align: start; text-indent: =
0px; text-transform: none; white-space: normal; widows: auto; =
word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display: =
inline !important;" class=3D"">Acee<span =
class=3D"Apple-converted-space">&nbsp;</span></span><br =
style=3D"font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: normal; letter-spacing: normal; =
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-stroke-width: 0px;" class=3D""><br style=3D"font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant-caps: =
normal; font-weight: normal; letter-spacing: normal; orphans: auto; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: =
0px;" class=3D""><br style=3D"font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant-caps: normal; font-weight: normal; =
letter-spacing: normal; orphans: auto; text-align: start; text-indent: =
0px; text-transform: none; white-space: normal; widows: auto; =
word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=3D""><br =
style=3D"font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: normal; letter-spacing: normal; =
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-stroke-width: 0px;" class=3D""><span style=3D"font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant-caps: =
normal; font-weight: normal; letter-spacing: normal; orphans: auto; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; =
float: none; display: inline !important;" =
class=3D"">_______________________________________________</span><br =
style=3D"font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: normal; letter-spacing: normal; =
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-stroke-width: 0px;" class=3D""><span style=3D"font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant-caps: =
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text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; =
float: none; display: inline !important;" class=3D"">Gen-art mailing =
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From nobody Tue Feb  6 18:05:28 2018
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From: Eric Rescorla <ekr@rtfm.com>
To: "The IESG" <iesg@ietf.org>
Cc: draft-ietf-idr-bgp-prefix-sid@ietf.org, Susan Hares <shares@ndzh.com>, aretana.ietf@gmail.com, idr-chairs@ietf.org, shares@ndzh.com, idr@ietf.org
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Subject: [Idr] Eric Rescorla's No Objection on draft-ietf-idr-bgp-prefix-sid-13: (with COMMENT)
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Eric Rescorla has entered the following ballot position for
draft-ietf-idr-bgp-prefix-sid-13: No Objection

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


   BGP Prefix-SID attribute, it MUST program the derived label as the
   local label for the prefix in its MPLS dataplane.  In case of any
   error, a BGP speaker MUST resort to the error handling rules
This seems over-strong, as the next paragraph suggests that you might reject it
due to policy.

   This document defines a new BGP attribute in order to address the use
   case described in [I-D.ietf-spring-segment-routing-msdc].  It i
   assumed that the new attribute (BGP Prefix-SID) advertisement is
Nit: "is assumed", i think?

   inherits the security considerations expressed in: [RFC4271] and
   [RFC3107].
This section seems like it needs to discuss how the security of this mechanism
interacts with BGPSEC, etc. Maybe it's just "the same as everything else" but
perhaps not...



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From: "Acee Lindem (acee)" <acee@cisco.com>
To: Eric Rescorla <ekr@rtfm.com>, The IESG <iesg@ietf.org>
CC: "draft-ietf-idr-bgp-prefix-sid@ietf.org" <draft-ietf-idr-bgp-prefix-sid@ietf.org>, Susan Hares <shares@ndzh.com>, "aretana.ietf@gmail.com" <aretana.ietf@gmail.com>, "idr-chairs@ietf.org" <idr-chairs@ietf.org>, "idr@ietf.org" <idr@ietf.org>
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Subject: Re: [Idr] Eric Rescorla's No Objection on draft-ietf-idr-bgp-prefix-sid-13: (with COMMENT)
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From: Eric Rescorla <ekr@rtfm.com>
Date: Tue, 6 Feb 2018 18:36:45 -0800
Message-ID: <CABcZeBPpn8YA7=Qg0DpMseL=1wXq-+BcEgUBa6a2yXsi5NPqLQ@mail.gmail.com>
To: "Acee Lindem (acee)" <acee@cisco.com>
Cc: The IESG <iesg@ietf.org>, "draft-ietf-idr-bgp-prefix-sid@ietf.org" <draft-ietf-idr-bgp-prefix-sid@ietf.org>, Susan Hares <shares@ndzh.com>,  "aretana.ietf@gmail.com" <aretana.ietf@gmail.com>, "idr-chairs@ietf.org" <idr-chairs@ietf.org>, "idr@ietf.org" <idr@ietf.org>
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Subject: Re: [Idr] Eric Rescorla's No Objection on draft-ietf-idr-bgp-prefix-sid-13: (with COMMENT)
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On Tue, Feb 6, 2018 at 6:32 PM, Acee Lindem (acee) <acee@cisco.com> wrote:

> Hi Eric,
>
> =EF=BB=BFOn 2/6/18, 9:05 PM, "Eric Rescorla" <ekr@rtfm.com> wrote:
>
>     Eric Rescorla has entered the following ballot position for
>     draft-ietf-idr-bgp-prefix-sid-13: No Objection
>
>     When responding, please keep the subject line intact and reply to all
>     email addresses included in the To and CC lines. (Feel free to cut th=
is
>     introductory paragraph, however.)
>
>
>     Please refer to https://www.ietf.org/iesg/statement/discuss-criteria.
> html
>     for more information about IESG DISCUSS and COMMENT positions.
>
>
>     The document, along with other ballot positions, can be found here:
>     https://datatracker.ietf.org/doc/draft-ietf-idr-bgp-prefix-sid/
>
>
>
>     ---------------------------------------------------------------------=
-
>     COMMENT:
>     ---------------------------------------------------------------------=
-
>
>
>        BGP Prefix-SID attribute, it MUST program the derived label as the
>        local label for the prefix in its MPLS dataplane.  In case of any
>        error, a BGP speaker MUST resort to the error handling rules
>     This seems over-strong, as the next paragraph suggests that you might
> reject it
>     due to policy.
>
> I really don't see that MUST is incorrect since normally the attribute
> would be validated prior to applying policy.
>

Oops. My bad. It's the first MUST that I am referring to, about programming
in
the label.



>        This document defines a new BGP attribute in order to address the
> use
>        case described in [I-D.ietf-spring-segment-routing-msdc].  It i
>        assumed that the new attribute (BGP Prefix-SID) advertisement is
>     Nit: "is assumed", i think?
>
> This was fixed based in the -13 version. You must be looking at a previou=
s
> version.
>

Sorry about that.


>
> ment        inherits the security considerations expressed in: [RFC4271]
> and
>        [RFC3107].
>     This section seems like it needs to discuss how the security of this
> mechanism
>     interacts with BGPSEC, etc. Maybe it's just "the same as everything
> else" but
>     perhaps not...
>
> The -13 version references RFC 8277 rather than RFC 3107 which has an
> extensive "Security Considerations" section relative to MPLS label
> advertisement. Do you want me to add that there are no security
> considerations unique to [RFC8205]?
>

I think that would be helpful.

-Ekr


>
> Thanks,
> Acee
>
>
>
>
>
>
>
>

--089e0828a13cf9d05c0564962c28
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<div dir=3D"ltr"><br><div class=3D"gmail_extra"><br><div class=3D"gmail_quo=
te">On Tue, Feb 6, 2018 at 6:32 PM, Acee Lindem (acee) <span dir=3D"ltr">&l=
t;<a href=3D"mailto:acee@cisco.com" target=3D"_blank">acee@cisco.com</a>&gt=
;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 =
.8ex;border-left:1px #ccc solid;padding-left:1ex">Hi Eric,<br>
<span class=3D""><br>
=EF=BB=BFOn 2/6/18, 9:05 PM, &quot;Eric Rescorla&quot; &lt;<a href=3D"mailt=
o:ekr@rtfm.com">ekr@rtfm.com</a>&gt; wrote:<br>
<br>
=C2=A0 =C2=A0 Eric Rescorla has entered the following ballot position for<b=
r>
=C2=A0 =C2=A0 draft-ietf-idr-bgp-prefix-sid-<wbr>13: No Objection<br>
<br>
=C2=A0 =C2=A0 When responding, please keep the subject line intact and repl=
y to all<br>
=C2=A0 =C2=A0 email addresses included in the To and CC lines. (Feel free t=
o cut this<br>
=C2=A0 =C2=A0 introductory paragraph, however.)<br>
<br>
<br>
=C2=A0 =C2=A0 Please refer to <a href=3D"https://www.ietf.org/iesg/statemen=
t/discuss-criteria.html" rel=3D"noreferrer" target=3D"_blank">https://www.i=
etf.org/iesg/<wbr>statement/discuss-criteria.<wbr>html</a><br>
=C2=A0 =C2=A0 for more information about IESG DISCUSS and COMMENT positions=
.<br>
<br>
<br>
=C2=A0 =C2=A0 The document, along with other ballot positions, can be found=
 here:<br>
=C2=A0 =C2=A0 <a href=3D"https://datatracker.ietf.org/doc/draft-ietf-idr-bg=
p-prefix-sid/" rel=3D"noreferrer" target=3D"_blank">https://datatracker.iet=
f.org/<wbr>doc/draft-ietf-idr-bgp-prefix-<wbr>sid/</a><br>
<br>
<br>
<br>
=C2=A0 =C2=A0 ------------------------------<wbr>--------------------------=
----<wbr>----------<br>
=C2=A0 =C2=A0 COMMENT:<br>
=C2=A0 =C2=A0 ------------------------------<wbr>--------------------------=
----<wbr>----------<br>
<br>
<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0BGP Prefix-SID attribute, it MUST program the de=
rived label as the<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0local label for the prefix in its MPLS dataplane=
.=C2=A0 In case of any<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0error, a BGP speaker MUST resort to the error ha=
ndling rules<br>
=C2=A0 =C2=A0 This seems over-strong, as the next paragraph suggests that y=
ou might reject it<br>
=C2=A0 =C2=A0 due to policy.<br>
<br>
</span>I really don&#39;t see that MUST is incorrect since normally the att=
ribute would be validated prior to applying policy.<br></blockquote><div><b=
r></div><div>Oops. My bad. It&#39;s the first MUST that I am referring to, =
about programming in</div><div>the label.</div><div><br></div><div>=C2=A0</=
div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-lef=
t:1px #ccc solid;padding-left:1ex"><span class=3D"">
=C2=A0 =C2=A0 =C2=A0 =C2=A0This document defines a new BGP attribute in ord=
er to address the use<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0case described in [I-D.ietf-spring-segment-<wbr>=
routing-msdc].=C2=A0 It i<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0assumed that the new attribute (BGP Prefix-SID) =
advertisement is<br>
=C2=A0 =C2=A0 Nit: &quot;is assumed&quot;, i think?<br>
<br>
</span>This was fixed based in the -13 version. You must be looking at a pr=
evious version.<br></blockquote><div><br></div><div>Sorry about that.</div>=
<div>=C2=A0</div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8=
ex;border-left:1px #ccc solid;padding-left:1ex">
<br>
ment=C2=A0 =C2=A0 =C2=A0 =C2=A0 inherits the security considerations expres=
sed in: [RFC4271] and<br>
<span class=3D"">=C2=A0 =C2=A0 =C2=A0 =C2=A0[RFC3107].<br>
=C2=A0 =C2=A0 This section seems like it needs to discuss how the security =
of this mechanism<br>
=C2=A0 =C2=A0 interacts with BGPSEC, etc. Maybe it&#39;s just &quot;the sam=
e as everything else&quot; but<br>
=C2=A0 =C2=A0 perhaps not...<br>
<br>
</span>The -13 version references RFC 8277 rather than RFC 3107 which has a=
n extensive &quot;Security Considerations&quot; section relative to MPLS la=
bel advertisement. Do you want me to add that there are no security conside=
rations unique to [RFC8205]?<br></blockquote><div><br></div><div>I think th=
at would be helpful.</div><div><br></div><div>-Ekr</div><div>=C2=A0</div><b=
lockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px =
#ccc solid;padding-left:1ex">
<br>
Thanks,<br>
Acee<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
</blockquote></div><br></div></div>

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From: "Acee Lindem (acee)" <acee@cisco.com>
To: Eric Rescorla <ekr@rtfm.com>
CC: The IESG <iesg@ietf.org>, "draft-ietf-idr-bgp-prefix-sid@ietf.org" <draft-ietf-idr-bgp-prefix-sid@ietf.org>, Susan Hares <shares@ndzh.com>, "aretana.ietf@gmail.com" <aretana.ietf@gmail.com>, "idr-chairs@ietf.org" <idr-chairs@ietf.org>, "idr@ietf.org" <idr@ietf.org>
Thread-Topic: Eric Rescorla's No Objection on draft-ietf-idr-bgp-prefix-sid-13: (with COMMENT)
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Date: Wed, 7 Feb 2018 02:40:40 +0000
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Subject: Re: [Idr] Eric Rescorla's No Objection on draft-ietf-idr-bgp-prefix-sid-13: (with COMMENT)
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From nobody Tue Feb  6 20:13:25 2018
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From: Suresh Krishnan <suresh@kaloom.com>
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Subject: [Idr] Suresh Krishnan's No Objection on draft-ietf-idr-bgp-prefix-sid-13: (with COMMENT)
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Suresh Krishnan has entered the following ballot position for
draft-ietf-idr-bgp-prefix-sid-13: No Objection

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email addresses included in the To and CC lines. (Feel free to cut this
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The document, along with other ballot positions, can be found here:
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----------------------------------------------------------------------
COMMENT:
----------------------------------------------------------------------

I don't see how the MUST in this receiving behavior in Section 4.2.

"However, a BGP Prefix-SID attribute corresponding to the BGP IPv6 address
family without an IPv6 SID TLV MUST be ignored."

makes sense with the MAY in the sending behavior

"A BGP speaker that originates an IPv6 prefix with the BGP Prefix-SID attribute
MAY include the IPv6 SID TLV."

Can you please clarify?



From nobody Wed Feb  7 01:32:51 2018
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From: PVLR Pavana Murthy <pvlrpm@gmail.com>
Date: Wed, 7 Feb 2018 15:02:45 +0530
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Subject: [Idr] BGP Flowspec(RFC 5575) Numeric Operator for inequality (!=)
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--001a1144e6904bd18d05649bfa6f
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Hello,
   As per the RFC 5575,

   0   1     2   3   4    5    6   7
+---+---+---+---+---+---+---+---+
| e   | a |   len   | 0  |  lt |gt | eq |
+---+---+---+---+---+---+---+---+

eq - equality between data and value.
The bits lt, gt, and eq can be combined to produce "less or
equal", "greater or equal", and inequality values.

For '<='    lt =1, gt =0, eq =1
For  '>='   lt= 0, gt=1, eq =1

how to achieve inequality? Is it by making lt = 0, gt =0, eq =0 ?

Please clarify.

Thanks,
Pavana.

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<div dir=3D"ltr">Hello,<div>=C2=A0 =C2=A0As per the RFC 5575,=C2=A0 =C2=A0<=
/div><div><br></div><div><div>=C2=A0 =C2=A00=C2=A0 =C2=A01=C2=A0 =C2=A0 =C2=
=A02=C2=A0 =C2=A03=C2=A0 =C2=A04=C2=A0 =C2=A0 5=C2=A0 =C2=A0 6=C2=A0 =C2=A0=
7</div><div>+---+---+---+---+---+---+---+---+</div><div>| e=C2=A0 =C2=A0| a=
 |=C2=A0 =C2=A0len=C2=A0 =C2=A0| 0=C2=A0 |=C2=A0 lt |gt | eq |</div><div>+-=
--+---+---+---+---+---+---+---+</div></div><div><br></div><div><div>eq - eq=
uality between data and value.</div><div>The bits lt, gt, and eq can be com=
bined to produce &quot;less or</div><div>equal&quot;, &quot;greater or equa=
l&quot;, and inequality values.</div></div><div><br></div><div>For &#39;&lt=
;=3D&#39;=C2=A0 =C2=A0 lt =3D1, gt =3D0, eq =3D1</div><div>For=C2=A0 &#39;&=
gt;=3D&#39;=C2=A0 =C2=A0lt=3D 0, gt=3D1, eq =3D1</div><div><br></div><div>h=
ow to achieve inequality? Is it by making lt =3D 0, gt =3D0, eq =3D0 ?</div=
><div>=C2=A0=C2=A0</div><div>Please clarify.</div><div><br></div><div>Thank=
s,</div><div>Pavana.</div></div>

--001a1144e6904bd18d05649bfa6f--


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Cc: Eric Rescorla <ekr@rtfm.com>, "idr@ietf.org" <idr@ietf.org>,  "idr-chairs@ietf.org" <idr-chairs@ietf.org>,  "draft-ietf-idr-bgp-prefix-sid@ietf.org" <draft-ietf-idr-bgp-prefix-sid@ietf.org>, The IESG <iesg@ietf.org>,  Susan Hares <shares@ndzh.com>
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Subject: Re: [Idr] Eric Rescorla's No Objection on draft-ietf-idr-bgp-prefix-sid-13: (with COMMENT)
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Hey Acee,

Regarding this text I would actually question it more then the policy point
Eric was raising.

The text says:

   When a BGP speaker receives a path from a neighbor with an acceptable
   BGP Prefix-SID attribute, it MUST program the derived label as the
   local label for the prefix in its MPLS dataplane.


IMO it is incorrect as stated as any label programming carried in the
attribute MUST **only** take place if received path is actually selected as
BGP best path for a given prefix.  Otherwise it is completely wrong thing
to do to install anything which is non best path.

Likewise the BGP path which is either withdrawn or is valid but no longer
best path should have labels carried in its attribute removed from data
plane.

Another interesting point also not discussed at all in the draft when
carrying labels in the attribute is how do you handle multi-path ? Is that
disabled when paths for a given net (and different next hops) have
attributes with different labels ? Is this allowed such that label is a
property of a tuple (prefix + next hop) and not just prefix - like current
version of the draft describes in number of places ?

Thx,
Robert.



On Wed, Feb 7, 2018 at 3:40 AM, Acee Lindem (acee) <acee@cisco.com> wrote:

> Hi Eric,
>
>
>
> *From: *Eric Rescorla <ekr@rtfm.com>
> *Date: *Tuesday, February 6, 2018 at 9:37 PM
> *To: *Acee Lindem <acee@cisco.com>
> *Cc: *The IESG <iesg@ietf.org>, "draft-ietf-idr-bgp-prefix-sid@ietf.org" =
<
> draft-ietf-idr-bgp-prefix-sid@ietf.org>, Susan Hares <shares@ndzh.com>,
> Alvaro Retana <aretana.ietf@gmail.com>, "idr-chairs@ietf.org" <
> idr-chairs@ietf.org>, IDR List <idr@ietf.org>
> *Subject: *Re: Eric Rescorla's No Objection on
> draft-ietf-idr-bgp-prefix-sid-13: (with COMMENT)
>
>
>
>
>
>
>
> On Tue, Feb 6, 2018 at 6:32 PM, Acee Lindem (acee) <acee@cisco.com> wrote=
:
>
> Hi Eric,
>
> On 2/6/18, 9:05 PM, "Eric Rescorla" <ekr@rtfm.com> wrote:
>
>     Eric Rescorla has entered the following ballot position for
>     draft-ietf-idr-bgp-prefix-sid-13: No Objection
>
>     When responding, please keep the subject line intact and reply to all
>     email addresses included in the To and CC lines. (Feel free to cut th=
is
>     introductory paragraph, however.)
>
>
>     Please refer to https://www.ietf.org/iesg/statement/discuss-criteria.
> html
>     for more information about IESG DISCUSS and COMMENT positions.
>
>
>     The document, along with other ballot positions, can be found here:
>     https://datatracker.ietf.org/doc/draft-ietf-idr-bgp-prefix-sid/
>
>
>
>     ---------------------------------------------------------------------=
-
>     COMMENT:
>     ---------------------------------------------------------------------=
-
>
>
>        BGP Prefix-SID attribute, it MUST program the derived label as the
>        local label for the prefix in its MPLS dataplane.  In case of any
>        error, a BGP speaker MUST resort to the error handling rules
>     This seems over-strong, as the next paragraph suggests that you might
> reject it
>     due to policy.
>
> I really don't see that MUST is incorrect since normally the attribute
> would be validated prior to applying policy.
>
>
>
> Oops. My bad. It's the first MUST that I am referring to, about
> programming in
>
> the label.
>
>
>
> Ok =E2=80=93 I can see your point here.
>
>
>
>
>
>        This document defines a new BGP attribute in order to address the
> use
>        case described in [I-D.ietf-spring-segment-routing-msdc].  It i
>        assumed that the new attribute (BGP Prefix-SID) advertisement is
>     Nit: "is assumed", i think?
>
> This was fixed based in the -13 version. You must be looking at a previou=
s
> version.
>
>
>
> Sorry about that.
>
>
>
>
> ment        inherits the security considerations expressed in: [RFC4271]
> and
>        [RFC3107].
>     This section seems like it needs to discuss how the security of this
> mechanism
>     interacts with BGPSEC, etc. Maybe it's just "the same as everything
> else" but
>     perhaps not...
>
> The -13 version references RFC 8277 rather than RFC 3107 which has an
> extensive "Security Considerations" section relative to MPLS label
> advertisement. Do you want me to add that there are no security
> considerations unique to [RFC8205]?
>
>
>
> I think that would be helpful.
>
>
>
> I will add this clarification and reference to RFC8205 in the -14 version=
.
>
>
>
> Thanks,
>
> Acee
>
>
>
> -Ekr
>
>
>
>
> Thanks,
> Acee
>
>
>
>
>
>
>
>
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr
>
>

--001a114b2d02ad121605649bfb4b
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small">Hey Acee,</div><div class=3D"gmail_defa=
ult" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br><=
/div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans=
-serif;font-size:small">Regarding this text I would actually question it mo=
re then the policy point Eric was raising.=C2=A0</div><div class=3D"gmail_d=
efault" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><b=
r></div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,s=
ans-serif;font-size:small">The text says:</div><div class=3D"gmail_default"=
 style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></div=
><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-ser=
if;font-size:small">

<pre class=3D"gmail-newpage" style=3D"font-size:13.3333px;margin-top:0px;ma=
rgin-bottom:0px;color:rgb(0,0,0);font-style:normal;font-variant-ligatures:n=
ormal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-a=
lign:start;text-indent:0px;text-transform:none;word-spacing:0px;text-decora=
tion-style:initial;text-decoration-color:initial">   When a BGP speaker rec=
eives a path from a neighbor with an acceptable
   BGP Prefix-SID attribute, it MUST program the derived label as the
   local label for the prefix in its MPLS dataplane. </pre>

<br></div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica=
,sans-serif;font-size:small">

<span style=3D"color:rgb(34,34,34);font-family:arial,helvetica,sans-serif;f=
ont-size:small;font-style:normal;font-variant-ligatures:normal;font-variant=
-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-in=
dent:0px;text-transform:none;white-space:normal;word-spacing:0px;background=
-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color=
:initial;float:none;display:inline">IMO it is incorrect as stated as any la=
bel programming carried in the attribute MUST *</span><span style=3D"color:=
rgb(34,34,34);font-family:arial,helvetica,sans-serif;font-size:small;font-s=
tyle:normal;font-variant-ligatures:normal;font-variant-caps:normal;letter-s=
pacing:normal;text-align:start;text-indent:0px;text-transform:none;white-sp=
ace:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decorati=
on-style:initial;text-decoration-color:initial;float:none;display:inline"><=
b>only*</b></span><span style=3D"color:rgb(34,34,34);font-family:arial,helv=
etica,sans-serif;font-size:small;font-style:normal;font-variant-ligatures:n=
ormal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-a=
lign:start;text-indent:0px;text-transform:none;white-space:normal;word-spac=
ing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;tex=
t-decoration-color:initial;float:none;display:inline"> take place if receiv=
ed path is actually selected as BGP best path for a given prefix.=C2=A0</sp=
an>=C2=A0Otherwise it is completely wrong thing to do to install anything w=
hich is non best path.=C2=A0<br></div><div class=3D"gmail_default" style=3D=
"font-family:arial,helvetica,sans-serif;font-size:small"><br></div><div cla=
ss=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-s=
ize:small">Likewise the BGP path which is either withdrawn or is valid but =
no longer best path should have labels carried in its attribute removed fro=
m data plane.=C2=A0</div><div class=3D"gmail_default" style=3D"font-family:=
arial,helvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_d=
efault" style=3D"font-family:arial,helvetica,sans-serif;font-size:small">An=
other interesting point also not discussed at all in the draft when carryin=
g labels in the attribute is how do you handle multi-path ? Is that disable=
d when paths for a given net (and different next hops) have attributes with=
 different labels ? Is this allowed such that label is a property of a tupl=
e (prefix + next hop) and not just prefix - like current version of the dra=
ft describes in number of places ?=C2=A0</div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></div>=
<div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-seri=
f;font-size:small">Thx,</div><div class=3D"gmail_default" style=3D"font-fam=
ily:arial,helvetica,sans-serif;font-size:small">Robert.</div><div class=3D"=
gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:sm=
all"><br></div><div class=3D"gmail_default" style=3D"font-family:arial,helv=
etica,sans-serif;font-size:small"><br></div><div class=3D"gmail_extra"><br>=
<div class=3D"gmail_quote">On Wed, Feb 7, 2018 at 3:40 AM, Acee Lindem (ace=
e) <span dir=3D"ltr">&lt;<a href=3D"mailto:acee@cisco.com" target=3D"_blank=
">acee@cisco.com</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote"=
 style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">





<div lang=3D"EN-US" link=3D"blue" vlink=3D"purple">
<div class=3D"m_6496312623527303991WordSection1">
<p class=3D"MsoNormal">Hi Eric, <u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div style=3D"border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><b><span style=3D"font-si=
ze:12.0pt;color:black">From:
</span></b><span style=3D"font-size:12.0pt;color:black">Eric Rescorla &lt;<=
a href=3D"mailto:ekr@rtfm.com" target=3D"_blank">ekr@rtfm.com</a>&gt;<br>
<b>Date: </b>Tuesday, February 6, 2018 at 9:37 PM<br>
<b>To: </b>Acee Lindem &lt;<a href=3D"mailto:acee@cisco.com" target=3D"_bla=
nk">acee@cisco.com</a>&gt;<br>
<b>Cc: </b>The IESG &lt;<a href=3D"mailto:iesg@ietf.org" target=3D"_blank">=
iesg@ietf.org</a>&gt;, &quot;<a href=3D"mailto:draft-ietf-idr-bgp-prefix-si=
d@ietf.org" target=3D"_blank">draft-ietf-idr-bgp-prefix-<wbr>sid@ietf.org</=
a>&quot; &lt;<a href=3D"mailto:draft-ietf-idr-bgp-prefix-sid@ietf.org" targ=
et=3D"_blank">draft-ietf-idr-bgp-prefix-<wbr>sid@ietf.org</a>&gt;, Susan Ha=
res &lt;<a href=3D"mailto:shares@ndzh.com" target=3D"_blank">shares@ndzh.co=
m</a>&gt;, Alvaro Retana &lt;<a href=3D"mailto:aretana.ietf@gmail.com" targ=
et=3D"_blank">aretana.ietf@gmail.com</a>&gt;, &quot;<a href=3D"mailto:idr-c=
hairs@ietf.org" target=3D"_blank">idr-chairs@ietf.org</a>&quot; &lt;<a href=
=3D"mailto:idr-chairs@ietf.org" target=3D"_blank">idr-chairs@ietf.org</a>&g=
t;, IDR List &lt;<a href=3D"mailto:idr@ietf.org" target=3D"_blank">idr@ietf=
.org</a>&gt;<br>
<b>Subject: </b>Re: Eric Rescorla&#39;s No Objection on draft-ietf-idr-bgp-=
prefix-sid-<wbr>13: (with COMMENT)<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><a name=3D"m_649631262352=
7303991__MailOriginalBody"><u></u>=C2=A0<u></u></a></p>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><u></u>=C2=A0<u></u=
></span></p>
<div><span class=3D"">
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span>On Tue, Feb 6, 2018=
 at 6:32 PM, Acee Lindem (acee) &lt;</span><a href=3D"mailto:acee@cisco.com=
" target=3D"_blank"><span>acee@cisco.com</span><span></span></a><span>&gt;
 wrote:<u></u><u></u></span></p>
<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" style=3D"margin-left:.5in"><span>Hi Eric,<br>
<br>
On 2/6/18, 9:05 PM, &quot;Eric Rescorla&quot; &lt;</span><a href=3D"mailto:=
ekr@rtfm.com" target=3D"_blank"><span>ekr@rtfm.com</span><span></span></a><=
span>&gt; wrote:<br>
<br>
=C2=A0 =C2=A0 Eric Rescorla has entered the following ballot position for<b=
r>
=C2=A0 =C2=A0 draft-ietf-idr-bgp-prefix-sid-<wbr>13: No Objection<br>
<br>
=C2=A0 =C2=A0 When responding, please keep the subject line intact and repl=
y to all<br>
=C2=A0 =C2=A0 email addresses included in the To and CC lines. (Feel free t=
o cut this<br>
=C2=A0 =C2=A0 introductory paragraph, however.)<br>
<br>
<br>
=C2=A0 =C2=A0 Please refer to </span><a href=3D"https://www.ietf.org/iesg/s=
tatement/discuss-criteria.html" target=3D"_blank"><span>https://www.ietf.or=
g/iesg/<wbr>statement/discuss-criteria.<wbr>html</span><span></span></a><sp=
an><br>
=C2=A0 =C2=A0 for more information about IESG DISCUSS and COMMENT positions=
.<br>
<br>
<br>
=C2=A0 =C2=A0 The document, along with other ballot positions, can be found=
 here:<br>
=C2=A0 =C2=A0 </span><a href=3D"https://datatracker.ietf.org/doc/draft-ietf=
-idr-bgp-prefix-sid/" target=3D"_blank"><span>https://datatracker.ietf.org/=
<wbr>doc/draft-ietf-idr-bgp-prefix-<wbr>sid/</span><span></span></a><span><=
br>
<br>
<br>
<br>
=C2=A0 =C2=A0 ------------------------------<wbr>--------------------------=
----<wbr>----------<br>
=C2=A0 =C2=A0 COMMENT:<br>
=C2=A0 =C2=A0 ------------------------------<wbr>--------------------------=
----<wbr>----------<br>
<br>
<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0BGP Prefix-SID attribute, it MUST program the de=
rived label as the<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0local label for the prefix in its MPLS dataplane=
.=C2=A0 In case of any<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0error, a BGP speaker MUST resort to the error ha=
ndling rules<br>
=C2=A0 =C2=A0 This seems over-strong, as the next paragraph suggests that y=
ou might reject it<br>
=C2=A0 =C2=A0 due to policy.<br>
<br>
I really don&#39;t see that MUST is incorrect since normally the attribute =
would be validated prior to applying policy.<u></u><u></u></span></p>
</blockquote>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><u></u>=C2=A0<u></u=
></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span>Oops. My bad. It&#3=
9;s the first MUST that I am referring to, about programming in<u></u><u></=
u></span></p>
</div>
</span><div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span>the label.<u></u><u=
></u></span></p>
<p class=3D"MsoNormal"><span><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span>Ok =E2=80=93 I can see your point here.
<u></u><u></u></span></p>
</div><span class=3D"">
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><u></u>=C2=A0<u></u=
></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span>=C2=A0<u></u><u></u=
></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" style=3D"margin-left:.5in"><span>=C2=A0 =C2=A0 =C2=
=A0 =C2=A0This document defines a new BGP attribute in order to address the=
 use<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0case described in [I-D.ietf-spring-segment-<wbr>=
routing-msdc].=C2=A0 It i<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0assumed that the new attribute (BGP Prefix-SID) =
advertisement is<br>
=C2=A0 =C2=A0 Nit: &quot;is assumed&quot;, i think?<br>
<br>
This was fixed based in the -13 version. You must be looking at a previous =
version.<u></u><u></u></span></p>
</blockquote>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><u></u>=C2=A0<u></u=
></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span>Sorry about that.<u=
></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span>=C2=A0<u></u><u></u=
></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" style=3D"margin-left:.5in"><span><br>
ment=C2=A0 =C2=A0 =C2=A0 =C2=A0 inherits the security considerations expres=
sed in: [RFC4271] and<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0[RFC3107].<br>
=C2=A0 =C2=A0 This section seems like it needs to discuss how the security =
of this mechanism<br>
=C2=A0 =C2=A0 interacts with BGPSEC, etc. Maybe it&#39;s just &quot;the sam=
e as everything else&quot; but<br>
=C2=A0 =C2=A0 perhaps not...<br>
<br>
The -13 version references RFC 8277 rather than RFC 3107 which has an exten=
sive &quot;Security Considerations&quot; section relative to MPLS label adv=
ertisement. Do you want me to add that there are no security considerations=
 unique to [RFC8205]?<u></u><u></u></span></p>
</blockquote>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><u></u>=C2=A0<u></u=
></span></p>
</div>
</span><div><span class=3D"">
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span>I think that would =
be helpful.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span><u></u>=C2=A0<u></u></span></p>
</span><p class=3D"MsoNormal"><span>I will add this clarification and refer=
ence to RFC8205 in the -14 version.
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span>Thanks,<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span>Acee <u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><u></u>=C2=A0<u></u=
></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span>-Ekr<u></u><u></u><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span>=C2=A0<u></u><u></u=
></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" style=3D"margin-right:0in;margin-bottom:12.0pt;margi=
n-left:.5in">
<span><br>
Thanks,<br>
Acee<br>
<br>
<br>
<br>
<br>
<br>
<br>
<u></u><u></u></span></p>
</blockquote>
</div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><u></u>=C2=A0<u></u=
></span></p>
</div>
</div>
</div>
</div>

<br>______________________________<wbr>_________________<br>
Idr mailing list<br>
<a href=3D"mailto:Idr@ietf.org">Idr@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/idr" rel=3D"noreferrer" ta=
rget=3D"_blank">https://www.ietf.org/mailman/<wbr>listinfo/idr</a><br>
<br></blockquote></div><br></div></div>

--001a114b2d02ad121605649bfb4b--


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From: Robert Raszuk <robert@raszuk.net>
Date: Wed, 7 Feb 2018 10:35:08 +0100
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Subject: Re: [Idr] BGP Flowspec(RFC 5575) Numeric Operator for inequality (!=)
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Yes.

Thx,
R.

On Wed, Feb 7, 2018 at 10:32 AM, PVLR Pavana Murthy <pvlrpm@gmail.com>
wrote:

> Hello,
>    As per the RFC 5575,
>
>    0   1     2   3   4    5    6   7
> +---+---+---+---+---+---+---+---+
> | e   | a |   len   | 0  |  lt |gt | eq |
> +---+---+---+---+---+---+---+---+
>
> eq - equality between data and value.
> The bits lt, gt, and eq can be combined to produce "less or
> equal", "greater or equal", and inequality values.
>
> For '<='    lt =1, gt =0, eq =1
> For  '>='   lt= 0, gt=1, eq =1
>
> how to achieve inequality? Is it by making lt = 0, gt =0, eq =0 ?
>
> Please clarify.
>
> Thanks,
> Pavana.
>
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr
>
>

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<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small">Yes.</div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></div>=
<div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-seri=
f;font-size:small">Thx,<br>R.</div></div><div class=3D"gmail_extra"><br><di=
v class=3D"gmail_quote">On Wed, Feb 7, 2018 at 10:32 AM, PVLR Pavana Murthy=
 <span dir=3D"ltr">&lt;<a href=3D"mailto:pvlrpm@gmail.com" target=3D"_blank=
">pvlrpm@gmail.com</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quot=
e" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">=
<div dir=3D"ltr">Hello,<div>=C2=A0 =C2=A0As per the RFC 5575,=C2=A0 =C2=A0<=
/div><div><br></div><div><div>=C2=A0 =C2=A00=C2=A0 =C2=A01=C2=A0 =C2=A0 =C2=
=A02=C2=A0 =C2=A03=C2=A0 =C2=A04=C2=A0 =C2=A0 5=C2=A0 =C2=A0 6=C2=A0 =C2=A0=
7</div><div>+---+---+---+---+---+---+---+-<wbr>--+</div><div>| e=C2=A0 =C2=
=A0| a |=C2=A0 =C2=A0len=C2=A0 =C2=A0| 0=C2=A0 |=C2=A0 lt |gt | eq |</div><=
div>+---+---+---+---+---+---+---+-<wbr>--+</div></div><div><br></div><div><=
div>eq - equality between data and value.</div><div>The bits lt, gt, and eq=
 can be combined to produce &quot;less or</div><div>equal&quot;, &quot;grea=
ter or equal&quot;, and inequality values.</div></div><div><br></div><div>F=
or &#39;&lt;=3D&#39;=C2=A0 =C2=A0 lt =3D1, gt =3D0, eq =3D1</div><div>For=
=C2=A0 &#39;&gt;=3D&#39;=C2=A0 =C2=A0lt=3D 0, gt=3D1, eq =3D1</div><div><br=
></div><div>how to achieve inequality? Is it by making lt =3D 0, gt =3D0, e=
q =3D0 ?</div><div>=C2=A0=C2=A0</div><div>Please clarify.</div><div><br></d=
iv><div>Thanks,</div><div>Pavana.</div></div>
<br>______________________________<wbr>_________________<br>
Idr mailing list<br>
<a href=3D"mailto:Idr@ietf.org">Idr@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/idr" rel=3D"noreferrer" ta=
rget=3D"_blank">https://www.ietf.org/mailman/<wbr>listinfo/idr</a><br>
<br></blockquote></div><br></div>

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From: PVLR Pavana Murthy <pvlrpm@gmail.com>
Date: Wed, 7 Feb 2018 15:21:58 +0530
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Subject: Re: [Idr] BGP Flowspec(RFC 5575) Numeric Operator for inequality (!=)
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Hello,
  Thanks for quick response. If  all lt=1, gt=1, eq=1, what should be done
?

Thanks,
Pavana.

On Wed, Feb 7, 2018 at 3:05 PM, Robert Raszuk <robert@raszuk.net> wrote:

> Yes.
>
> Thx,
> R.
>
> On Wed, Feb 7, 2018 at 10:32 AM, PVLR Pavana Murthy <pvlrpm@gmail.com>
> wrote:
>
>> Hello,
>>    As per the RFC 5575,
>>
>>    0   1     2   3   4    5    6   7
>> +---+---+---+---+---+---+---+---+
>> | e   | a |   len   | 0  |  lt |gt | eq |
>> +---+---+---+---+---+---+---+---+
>>
>> eq - equality between data and value.
>> The bits lt, gt, and eq can be combined to produce "less or
>> equal", "greater or equal", and inequality values.
>>
>> For '<='    lt =1, gt =0, eq =1
>> For  '>='   lt= 0, gt=1, eq =1
>>
>> how to achieve inequality? Is it by making lt = 0, gt =0, eq =0 ?
>>
>> Please clarify.
>>
>> Thanks,
>> Pavana.
>>
>> _______________________________________________
>> Idr mailing list
>> Idr@ietf.org
>> https://www.ietf.org/mailman/listinfo/idr
>>
>>
>

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<div dir=3D"ltr">Hello,<div>=C2=A0 Thanks for quick response. If=C2=A0 all =
lt=3D1, gt=3D1, eq=3D1, what should be done ?=C2=A0=C2=A0</div><div><br></d=
iv><div>Thanks,</div><div>Pavana.=C2=A0</div></div><div class=3D"gmail_extr=
a"><br><div class=3D"gmail_quote">On Wed, Feb 7, 2018 at 3:05 PM, Robert Ra=
szuk <span dir=3D"ltr">&lt;<a href=3D"mailto:robert@raszuk.net" target=3D"_=
blank">robert@raszuk.net</a>&gt;</span> wrote:<br><blockquote class=3D"gmai=
l_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left=
:1ex"><div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:ar=
ial,helvetica,sans-serif;font-size:small">Yes.</div><div class=3D"gmail_def=
ault" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br>=
</div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,san=
s-serif;font-size:small">Thx,<br>R.</div></div><div class=3D"gmail_extra"><=
br><div class=3D"gmail_quote"><div><div class=3D"h5">On Wed, Feb 7, 2018 at=
 10:32 AM, PVLR Pavana Murthy <span dir=3D"ltr">&lt;<a href=3D"mailto:pvlrp=
m@gmail.com" target=3D"_blank">pvlrpm@gmail.com</a>&gt;</span> wrote:<br></=
div></div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;bord=
er-left:1px #ccc solid;padding-left:1ex"><div><div class=3D"h5"><div dir=3D=
"ltr">Hello,<div>=C2=A0 =C2=A0As per the RFC 5575,=C2=A0 =C2=A0</div><div><=
br></div><div><div>=C2=A0 =C2=A00=C2=A0 =C2=A01=C2=A0 =C2=A0 =C2=A02=C2=A0 =
=C2=A03=C2=A0 =C2=A04=C2=A0 =C2=A0 5=C2=A0 =C2=A0 6=C2=A0 =C2=A07</div><div=
>+---+---+---+---+---+---+---+-<wbr>--+</div><div>| e=C2=A0 =C2=A0| a |=C2=
=A0 =C2=A0len=C2=A0 =C2=A0| 0=C2=A0 |=C2=A0 lt |gt | eq |</div><div>+---+--=
-+---+---+---+---+---+-<wbr>--+</div></div><div><br></div><div><div>eq - eq=
uality between data and value.</div><div>The bits lt, gt, and eq can be com=
bined to produce &quot;less or</div><div>equal&quot;, &quot;greater or equa=
l&quot;, and inequality values.</div></div><div><br></div><div>For &#39;&lt=
;=3D&#39;=C2=A0 =C2=A0 lt =3D1, gt =3D0, eq =3D1</div><div>For=C2=A0 &#39;&=
gt;=3D&#39;=C2=A0 =C2=A0lt=3D 0, gt=3D1, eq =3D1</div><div><br></div><div>h=
ow to achieve inequality? Is it by making lt =3D 0, gt =3D0, eq =3D0 ?</div=
><div>=C2=A0=C2=A0</div><div>Please clarify.</div><div><br></div><div>Thank=
s,</div><div>Pavana.</div></div>
<br></div></div>______________________________<wbr>_________________<br>
Idr mailing list<br>
<a href=3D"mailto:Idr@ietf.org" target=3D"_blank">Idr@ietf.org</a><br>
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</blockquote></div><br></div>

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From: PVLR Pavana Murthy <pvlrpm@gmail.com>
Date: Wed, 7 Feb 2018 15:38:16 +0530
Message-ID: <CAN-MQG7QUP2zqm0WheDiSEZR+tY+WcyZH9ko=Kyd73Fx=diUdA@mail.gmail.com>
To: Robert Raszuk <robert@raszuk.net>, idr wg <idr@ietf.org>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/idr/VR6wTcqNbXcPMxwOEwz9EVjRBSI>
Subject: Re: [Idr] BGP Flowspec(RFC 5575) Numeric Operator for inequality (!=)
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adding idr to To: list.

On Wed, Feb 7, 2018 at 3:21 PM, PVLR Pavana Murthy <pvlrpm@gmail.com> wrote:

> Hello,
>   Thanks for quick response. If  all lt=1, gt=1, eq=1, what should be done
> ?
>
> Thanks,
> Pavana.
>
> On Wed, Feb 7, 2018 at 3:05 PM, Robert Raszuk <robert@raszuk.net> wrote:
>
>> Yes.
>>
>> Thx,
>> R.
>>
>> On Wed, Feb 7, 2018 at 10:32 AM, PVLR Pavana Murthy <pvlrpm@gmail.com>
>> wrote:
>>
>>> Hello,
>>>    As per the RFC 5575,
>>>
>>>    0   1     2   3   4    5    6   7
>>> +---+---+---+---+---+---+---+---+
>>> | e   | a |   len   | 0  |  lt |gt | eq |
>>> +---+---+---+---+---+---+---+---+
>>>
>>> eq - equality between data and value.
>>> The bits lt, gt, and eq can be combined to produce "less or
>>> equal", "greater or equal", and inequality values.
>>>
>>> For '<='    lt =1, gt =0, eq =1
>>> For  '>='   lt= 0, gt=1, eq =1
>>>
>>> how to achieve inequality? Is it by making lt = 0, gt =0, eq =0 ?
>>>
>>> Please clarify.
>>>
>>> Thanks,
>>> Pavana.
>>>
>>> _______________________________________________
>>> Idr mailing list
>>> Idr@ietf.org
>>> https://www.ietf.org/mailman/listinfo/idr
>>>
>>>
>>
>

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<div dir=3D"ltr">adding idr to To: list.</div><div class=3D"gmail_extra"><b=
r><div class=3D"gmail_quote">On Wed, Feb 7, 2018 at 3:21 PM, PVLR Pavana Mu=
rthy <span dir=3D"ltr">&lt;<a href=3D"mailto:pvlrpm@gmail.com" target=3D"_b=
lank">pvlrpm@gmail.com</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_=
quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1=
ex"><div dir=3D"ltr">Hello,<div>=C2=A0 Thanks for quick response. If=C2=A0 =
all lt=3D1, gt=3D1, eq=3D1, what should be done ?=C2=A0=C2=A0</div><div><br=
></div><div>Thanks,</div><div>Pavana.=C2=A0</div></div><div class=3D"HOEnZb=
"><div class=3D"h5"><div class=3D"gmail_extra"><br><div class=3D"gmail_quot=
e">On Wed, Feb 7, 2018 at 3:05 PM, Robert Raszuk <span dir=3D"ltr">&lt;<a h=
ref=3D"mailto:robert@raszuk.net" target=3D"_blank">robert@raszuk.net</a>&gt=
;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 =
.8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir=3D"ltr"><div cla=
ss=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-s=
ize:small">Yes.</div><div class=3D"gmail_default" style=3D"font-family:aria=
l,helvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_defau=
lt" style=3D"font-family:arial,helvetica,sans-serif;font-size:small">Thx,<b=
r>R.</div></div><div class=3D"gmail_extra"><br><div class=3D"gmail_quote"><=
div><div class=3D"m_53086628077703532h5">On Wed, Feb 7, 2018 at 10:32 AM, P=
VLR Pavana Murthy <span dir=3D"ltr">&lt;<a href=3D"mailto:pvlrpm@gmail.com"=
 target=3D"_blank">pvlrpm@gmail.com</a>&gt;</span> wrote:<br></div></div><b=
lockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px =
#ccc solid;padding-left:1ex"><div><div class=3D"m_53086628077703532h5"><div=
 dir=3D"ltr">Hello,<div>=C2=A0 =C2=A0As per the RFC 5575,=C2=A0 =C2=A0</div=
><div><br></div><div><div>=C2=A0 =C2=A00=C2=A0 =C2=A01=C2=A0 =C2=A0 =C2=A02=
=C2=A0 =C2=A03=C2=A0 =C2=A04=C2=A0 =C2=A0 5=C2=A0 =C2=A0 6=C2=A0 =C2=A07</d=
iv><div>+---+---+---+---+---+---+---+-<wbr>--+</div><div>| e=C2=A0 =C2=A0| =
a |=C2=A0 =C2=A0len=C2=A0 =C2=A0| 0=C2=A0 |=C2=A0 lt |gt | eq |</div><div>+=
---+---+---+---+---+---+---+-<wbr>--+</div></div><div><br></div><div><div>e=
q - equality between data and value.</div><div>The bits lt, gt, and eq can =
be combined to produce &quot;less or</div><div>equal&quot;, &quot;greater o=
r equal&quot;, and inequality values.</div></div><div><br></div><div>For &#=
39;&lt;=3D&#39;=C2=A0 =C2=A0 lt =3D1, gt =3D0, eq =3D1</div><div>For=C2=A0 =
&#39;&gt;=3D&#39;=C2=A0 =C2=A0lt=3D 0, gt=3D1, eq =3D1</div><div><br></div>=
<div>how to achieve inequality? Is it by making lt =3D 0, gt =3D0, eq =3D0 =
?</div><div>=C2=A0=C2=A0</div><div>Please clarify.</div><div><br></div><div=
>Thanks,</div><div>Pavana.</div></div>
<br></div></div>______________________________<wbr>_________________<br>
Idr mailing list<br>
<a href=3D"mailto:Idr@ietf.org" target=3D"_blank">Idr@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/idr" rel=3D"noreferrer" ta=
rget=3D"_blank">https://www.ietf.org/mailman/l<wbr>istinfo/idr</a><br>
<br></blockquote></div><br></div>
</blockquote></div><br></div>
</div></div></blockquote></div><br></div>

--f403045d5a804e5a9905649c790d--


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To: PVLR Pavana Murthy <pvlrpm@gmail.com>
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Subject: Re: [Idr] BGP Flowspec(RFC 5575) Numeric Operator for inequality (!=)
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That's illegal combination as value can not be "less then" and "greater
then" a given value in the same time.

In the spirit of being liberal in what you accept such [op,value] should be
ignored and error (sys)logged.

Legal combinations are clearly listed in the text: lt=1 & eq=1,  gt=1 &
eq=1, all zeros.

Thx,
R.


On Wed, Feb 7, 2018 at 10:51 AM, PVLR Pavana Murthy <pvlrpm@gmail.com>
wrote:

> Hello,
>   Thanks for quick response. If  all lt=1, gt=1, eq=1, what should be done
> ?
>
> Thanks,
> Pavana.
>
> On Wed, Feb 7, 2018 at 3:05 PM, Robert Raszuk <robert@raszuk.net> wrote:
>
>> Yes.
>>
>> Thx,
>> R.
>>
>> On Wed, Feb 7, 2018 at 10:32 AM, PVLR Pavana Murthy <pvlrpm@gmail.com>
>> wrote:
>>
>>> Hello,
>>>    As per the RFC 5575,
>>>
>>>    0   1     2   3   4    5    6   7
>>> +---+---+---+---+---+---+---+---+
>>> | e   | a |   len   | 0  |  lt |gt | eq |
>>> +---+---+---+---+---+---+---+---+
>>>
>>> eq - equality between data and value.
>>> The bits lt, gt, and eq can be combined to produce "less or
>>> equal", "greater or equal", and inequality values.
>>>
>>> For '<='    lt =1, gt =0, eq =1
>>> For  '>='   lt= 0, gt=1, eq =1
>>>
>>> how to achieve inequality? Is it by making lt = 0, gt =0, eq =0 ?
>>>
>>> Please clarify.
>>>
>>> Thanks,
>>> Pavana.
>>>
>>> _______________________________________________
>>> Idr mailing list
>>> Idr@ietf.org
>>> https://www.ietf.org/mailman/listinfo/idr
>>>
>>>
>>
>

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<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small">That&#39;s=
 illegal combination as value can not be &quot;less then&quot; and &quot;gr=
eater then&quot; a given value in the same time.=C2=A0</div><div class=3D"g=
mail_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:sma=
ll"><br></div><div class=3D"gmail_default" style=3D"font-family:arial,helve=
tica,sans-serif;font-size:small">In the spirit of being liberal in what you=
 accept such [op,value] should be ignored and error (sys)logged.=C2=A0</div=
><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-ser=
if;font-size:small"><br></div><div class=3D"gmail_default" style=3D"font-fa=
mily:arial,helvetica,sans-serif;font-size:small">Legal combinations are cle=
arly listed in the text: lt=3D1 &amp; eq=3D1,=C2=A0=C2=A0g<span style=3D"co=
lor:rgb(34,34,34);font-family:arial,helvetica,sans-serif;font-size:small;fo=
nt-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font=
-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-tra=
nsform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,25=
5,255);text-decoration-style:initial;text-decoration-color:initial;float:no=
ne;display:inline">t=3D1 &amp; eq=3D1, all zeros.</span></div><div class=3D=
"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:s=
mall"><br></div><div class=3D"gmail_default" style=3D"font-family:arial,hel=
vetica,sans-serif;font-size:small">Thx,<br>R.<br></div><div class=3D"gmail_=
default" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><=
br></div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,=
sans-serif;font-size:small"><br></div><div class=3D"gmail_extra"><div class=
=3D"gmail_quote">On Wed, Feb 7, 2018 at 10:51 AM, PVLR Pavana Murthy <span =
dir=3D"ltr">&lt;<a href=3D"mailto:pvlrpm@gmail.com" target=3D"_blank">pvlrp=
m@gmail.com</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" styl=
e=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div di=
r=3D"ltr">Hello,<div>=C2=A0 Thanks for quick response. If=C2=A0 all lt=3D1,=
 gt=3D1, eq=3D1, what should be done ?=C2=A0=C2=A0</div><div><br></div><div=
>Thanks,</div><div>Pavana.=C2=A0</div></div><div class=3D"HOEnZb"><div clas=
s=3D"h5"><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">On Wed, =
Feb 7, 2018 at 3:05 PM, Robert Raszuk <span dir=3D"ltr">&lt;<a href=3D"mail=
to:robert@raszuk.net" target=3D"_blank">robert@raszuk.net</a>&gt;</span> wr=
ote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border=
-left:1px #ccc solid;padding-left:1ex"><div dir=3D"ltr"><div style=3D"font-=
family:arial,helvetica,sans-serif;font-size:small">Yes.</div><div style=3D"=
font-family:arial,helvetica,sans-serif;font-size:small"><br></div><div styl=
e=3D"font-family:arial,helvetica,sans-serif;font-size:small">Thx,<br>R.</di=
v></div><div class=3D"gmail_extra"><br><div class=3D"gmail_quote"><div><div=
 class=3D"m_-2390909875354399511h5">On Wed, Feb 7, 2018 at 10:32 AM, PVLR P=
avana Murthy <span dir=3D"ltr">&lt;<a href=3D"mailto:pvlrpm@gmail.com" targ=
et=3D"_blank">pvlrpm@gmail.com</a>&gt;</span> wrote:<br></div></div><blockq=
uote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc =
solid;padding-left:1ex"><div><div class=3D"m_-2390909875354399511h5"><div d=
ir=3D"ltr">Hello,<div>=C2=A0 =C2=A0As per the RFC 5575,=C2=A0 =C2=A0</div><=
div><br></div><div><div>=C2=A0 =C2=A00=C2=A0 =C2=A01=C2=A0 =C2=A0 =C2=A02=
=C2=A0 =C2=A03=C2=A0 =C2=A04=C2=A0 =C2=A0 5=C2=A0 =C2=A0 6=C2=A0 =C2=A07</d=
iv><div>+---+---+---+---+---+---+---+-<wbr>--+</div><div>| e=C2=A0 =C2=A0| =
a |=C2=A0 =C2=A0len=C2=A0 =C2=A0| 0=C2=A0 |=C2=A0 lt |gt | eq |</div><div>+=
---+---+---+---+---+---+---+-<wbr>--+</div></div><div><br></div><div><div>e=
q - equality between data and value.</div><div>The bits lt, gt, and eq can =
be combined to produce &quot;less or</div><div>equal&quot;, &quot;greater o=
r equal&quot;, and inequality values.</div></div><div><br></div><div>For &#=
39;&lt;=3D&#39;=C2=A0 =C2=A0 lt =3D1, gt =3D0, eq =3D1</div><div>For=C2=A0 =
&#39;&gt;=3D&#39;=C2=A0 =C2=A0lt=3D 0, gt=3D1, eq =3D1</div><div><br></div>=
<div>how to achieve inequality? Is it by making lt =3D 0, gt =3D0, eq =3D0 =
?</div><div>=C2=A0=C2=A0</div><div>Please clarify.</div><div><br></div><div=
>Thanks,</div><div>Pavana.</div></div>
<br></div></div>______________________________<wbr>_________________<br>
Idr mailing list<br>
<a href=3D"mailto:Idr@ietf.org" target=3D"_blank">Idr@ietf.org</a><br>
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rget=3D"_blank">https://www.ietf.org/mailman/l<wbr>istinfo/idr</a><br>
<br></blockquote></div><br></div>
</blockquote></div><br></div>
</div></div></blockquote></div><br></div></div>

--001a114b2d0271237405649c99ad--


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From: Christoph Loibl <c@tix.at>
To: Robert Raszuk <robert@raszuk.net>, PVLR Pavana Murthy <pvlrpm@gmail.com>
CC: idr wg <idr@ietf.org>
Date: Wed, 07 Feb 2018 12:08:29 +0100
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Subject: Re: [Idr] BGP Flowspec(RFC 5575) Numeric Operator for inequality (!=)
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Hi,

Please refer to the rfc5575bis which is in the queue to be published soon 
and comes with a explicit list of the bitcombinations.

https://datatracker.ietf.org/doc/draft-ietf-idr-rfc5575bis/

Christoph


On 7 February 2018 10:58:33 am Robert Raszuk <robert@raszuk.net> wrote:

> That's illegal combination as value can not be "less then" and "greater
> then" a given value in the same time.
>
> In the spirit of being liberal in what you accept such [op,value] should be
> ignored and error (sys)logged.
>
> Legal combinations are clearly listed in the text: lt=1 & eq=1,  gt=1 &
> eq=1, all zeros.
>
> Thx,
> R.
>
>
> On Wed, Feb 7, 2018 at 10:51 AM, PVLR Pavana Murthy <pvlrpm@gmail.com>
> wrote:
>
>> Hello,
>>   Thanks for quick response. If  all lt=1, gt=1, eq=1, what should be done
>> ?
>>
>> Thanks,
>> Pavana.
>>
>> On Wed, Feb 7, 2018 at 3:05 PM, Robert Raszuk <robert@raszuk.net> wrote:
>>
>>> Yes.
>>>
>>> Thx,
>>> R.
>>>
>>> On Wed, Feb 7, 2018 at 10:32 AM, PVLR Pavana Murthy <pvlrpm@gmail.com>
>>> wrote:
>>>
>>>> Hello,
>>>>    As per the RFC 5575,
>>>>
>>>>    0   1     2   3   4    5    6   7
>>>> +---+---+---+---+---+---+---+---+
>>>> | e   | a |   len   | 0  |  lt |gt | eq |
>>>> +---+---+---+---+---+---+---+---+
>>>>
>>>> eq - equality between data and value.
>>>> The bits lt, gt, and eq can be combined to produce "less or
>>>> equal", "greater or equal", and inequality values.
>>>>
>>>> For '<='    lt =1, gt =0, eq =1
>>>> For  '>='   lt= 0, gt=1, eq =1
>>>>
>>>> how to achieve inequality? Is it by making lt = 0, gt =0, eq =0 ?
>>>>
>>>> Please clarify.
>>>>
>>>> Thanks,
>>>> Pavana.
>>>>
>>>> _______________________________________________
>>>> Idr mailing list
>>>> Idr@ietf.org
>>>> https://www.ietf.org/mailman/listinfo/idr
>>>>
>>>>
>>>
>>
>
>
>
> ----------
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<html>
<head>
</head>
<body>
<div style=3D"color: black;">
<div style=3D"color: black;">
<p style=3D"margin: 0 0 1em 0; color: black;">Hi,</p>
<p style=3D"margin: 0 0 1em 0; color: black;">Please refer to the rfc5575bi=
s which is in the queue to be published soon and comes with a explicit list=
 of the bitcombinations.</p>
<p style=3D"margin: 0 0 1em 0; color: black;"><a href=3D"https://datatracke=
r.ietf.org/doc/draft-ietf-idr-rfc5575bis/">https://datatracker.ietf.org/doc=
/draft-ietf-idr-rfc5575bis/</a></p>
<p style=3D"margin: 0 0 1em 0; color: black;">Christoph</p>
</div>
<div style=3D"color: black;">
<p style=3D"color: black; font-size: 10pt; font-family: Arial, sans-serif; =
margin: 10pt 0;">On 7 February 2018 10:58:33 am Robert Raszuk &lt;robert@ra=
szuk.net&gt; wrote:</p>
<blockquote type=3D"cite" class=3D"gmail_quote" style=3D"margin: 0 0 0 0.75=
ex; border-left: 1px solid #808080; padding-left: 0.75ex;">
<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small">That&#39;s=
 illegal combination as value can not be &quot;less then&quot; and &quot;gr=
eater then&quot; a given value in the same time.=C2=A0</div><div class=3D"g=
mail_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:sma=
ll"><br></div><div class=3D"gmail_default" style=3D"font-family:arial,helve=
tica,sans-serif;font-size:small">In the spirit of being liberal in what you=
 accept such [op,value] should be ignored and error (sys)logged.=C2=A0</div=
><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-ser=
if;font-size:small"><br></div><div class=3D"gmail_default" style=3D"font-fa=
mily:arial,helvetica,sans-serif;font-size:small">Legal combinations are cle=
arly listed in the text: lt=3D1 &amp; eq=3D1,=C2=A0=C2=A0g<span style=3D"co=
lor:rgb(34,34,34);font-family:arial,helvetica,sans-serif;font-size:small;fo=
nt-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font=
-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-tra=
nsform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,25=
5,255);text-decoration-style:initial;text-decoration-color:initial;float:no=
ne;display:inline">t=3D1 &amp; eq=3D1, all zeros.</span></div><div class=3D=
"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:s=
mall"><br></div><div class=3D"gmail_default" style=3D"font-family:arial,hel=
vetica,sans-serif;font-size:small">Thx,<br>R.<br></div><div class=3D"gmail_=
default" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><=
br></div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,=
sans-serif;font-size:small"><br></div><div class=3D"gmail_extra"><div class=
=3D"gmail_quote">On Wed, Feb 7, 2018 at 10:51 AM, PVLR Pavana Murthy <span =
dir=3D"ltr">&lt;<a href=3D"mailto:pvlrpm@gmail.com" target=3D"_blank">pvlrp=
m@gmail.com</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" styl=
e=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div di=
r=3D"ltr">Hello,<div>=C2=A0 Thanks for quick response. If=C2=A0 all lt=3D1,=
 gt=3D1, eq=3D1, what should be done ?=C2=A0=C2=A0</div><div><br></div><div=
>Thanks,</div><div>Pavana.=C2=A0</div></div><div class=3D"HOEnZb"><div clas=
s=3D"h5"><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">On Wed, =
Feb 7, 2018 at 3:05 PM, Robert Raszuk <span dir=3D"ltr">&lt;<a href=3D"mail=
to:robert@raszuk.net" target=3D"_blank">robert@raszuk.net</a>&gt;</span> wr=
ote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border=
-left:1px #ccc solid;padding-left:1ex"><div dir=3D"ltr"><div style=3D"font-=
family:arial,helvetica,sans-serif;font-size:small">Yes.</div><div style=3D"=
font-family:arial,helvetica,sans-serif;font-size:small"><br></div><div styl=
e=3D"font-family:arial,helvetica,sans-serif;font-size:small">Thx,<br>R.</di=
v></div><div class=3D"gmail_extra"><br><div class=3D"gmail_quote"><div><div=
 class=3D"m_-2390909875354399511h5">On Wed, Feb 7, 2018 at 10:32 AM, PVLR P=
avana Murthy <span dir=3D"ltr">&lt;<a href=3D"mailto:pvlrpm@gmail.com" targ=
et=3D"_blank">pvlrpm@gmail.com</a>&gt;</span> wrote:<br></div></div><blockq=
uote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc =
solid;padding-left:1ex"><div><div class=3D"m_-2390909875354399511h5"><div d=
ir=3D"ltr">Hello,<div>=C2=A0 =C2=A0As per the RFC 5575,=C2=A0 =C2=A0</div><=
div><br></div><div><div>=C2=A0 =C2=A00=C2=A0 =C2=A01=C2=A0 =C2=A0 =C2=A02=
=C2=A0 =C2=A03=C2=A0 =C2=A04=C2=A0 =C2=A0 5=C2=A0 =C2=A0 6=C2=A0 =C2=A07</d=
iv><div>+---+---+---+---+---+---+---+-<wbr>--+</div><div>| e=C2=A0 =C2=A0| =
a |=C2=A0 =C2=A0len=C2=A0 =C2=A0| 0=C2=A0 |=C2=A0 lt |gt | eq |</div><div>+=
---+---+---+---+---+---+---+-<wbr>--+</div></div><div><br></div><div><div>e=
q - equality between data and value.</div><div>The bits lt, gt, and eq can =
be combined to produce &quot;less or</div><div>equal&quot;, &quot;greater o=
r equal&quot;, and inequality values.</div></div><div><br></div><div>For &#=
39;&lt;=3D&#39;=C2=A0 =C2=A0 lt =3D1, gt =3D0, eq =3D1</div><div>For=C2=A0 =
&#39;&gt;=3D&#39;=C2=A0 =C2=A0lt=3D 0, gt=3D1, eq =3D1</div><div><br></div>=
<div>how to achieve inequality? Is it by making lt =3D 0, gt =3D0, eq =3D0 =
?</div><div>=C2=A0=C2=A0</div><div>Please clarify.</div><div><br></div><div=
>Thanks,</div><div>Pavana.</div></div>
<br></div></div>______________________________<wbr>_________________<br>
Idr mailing list<br>
<a href=3D"mailto:Idr@ietf.org" target=3D"_blank">Idr@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/idr" rel=3D"noreferrer" ta=
rget=3D"_blank">https://www.ietf.org/mailman/l<wbr>istinfo/idr</a><br>
<br></blockquote></div><br></div>
</blockquote></div><br></div>
</div></div></blockquote></div><br></div></div>

_______________________________________________<br>
Idr mailing list<br>
<a class=3D"aqm-autolink aqm-autowrap" href=3D"mailto:Idr%40ietf.org">Idr@i=
etf.org</a><br>
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<br>
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From: "Acee Lindem (acee)" <acee@cisco.com>
To: Robert Raszuk <robert@raszuk.net>
CC: Eric Rescorla <ekr@rtfm.com>, "idr@ietf.org" <idr@ietf.org>, "idr-chairs@ietf.org" <idr-chairs@ietf.org>, "draft-ietf-idr-bgp-prefix-sid@ietf.org" <draft-ietf-idr-bgp-prefix-sid@ietf.org>, The IESG <iesg@ietf.org>, "Susan Hares" <shares@ndzh.com>
Thread-Topic: [Idr] Eric Rescorla's No Objection on draft-ietf-idr-bgp-prefix-sid-13: (with COMMENT)
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Date: Wed, 7 Feb 2018 15:24:41 +0000
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Subject: Re: [Idr] Eric Rescorla's No Objection on draft-ietf-idr-bgp-prefix-sid-13: (with COMMENT)
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From nobody Wed Feb  7 07:43:12 2018
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Warren Kumari has entered the following ballot position for
draft-ietf-idr-bgp-prefix-sid-13: Discuss

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----------------------------------------------------------------------
DISCUSS:
----------------------------------------------------------------------

I had the same logging question an Alexey and guessed (perhaps incorrectly)
that this was to try and prevent DoSing the logging infrastructure by sending
too many log messages. If this is the reason, I think that it should be better
spelled out -- and if this is *not* the reason, I think that there needs to be
a good explanation. Note that I will happy clear as soon as someone says "Yeah,
we've heard and will deal with this" -- I think that this is a fine document
and that addressing this issue should be a minor change, but important enough
for operational reasons that it needs to be discussed.


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

Major(ish) issue:
Section 5.  Advertising BGP Prefix-SID Attribute
   "The BGP Prefix-SID attribute MAY be attached to labeled BGP prefixes
   (IPv4/IPv6) [RFC8277] or to IPv6 unicast prefixes [RFC4760].  In
   order to prevent distribution of the BGP Prefix-SID attribute beyond
   its intended scope of applicability, attribute filtering SHOULD be
   deployed."
Thank you for including this -- however, as I'm sure you know, the state of BGP
filtering in the wild is, er, poor. Can you please provide some additional
guidance? For example, could you include an appendix with examples? Or simply a
bit more text on determining the scope of applicability? Apologies if I missed
this, but should this by default be filtered on eBGP sessions? The included
text is a great start, but some more (so people don't miss it and shoot
themselves in the foot would be much appreciated.

Nits:
Section 1:
" the SID consists of a label while when SR is applied to the IPv6 dataplane
the SID consists of an IPv6 address." I think that "of a label, while" would
make this much more readable. It took me a few tries without it.

Section 4:
" A BGP speaker receiving a BGP Prefix-SID attribute from an EBGP
   neighbor residing outside the boundaries of the SR domain, MUST
   discard the attribute unless it is configured to accept the attribute
   from the EBGP neighbor."
Spurious comma between domain and MUST (yeah, I want a comma above, I don't
want one here, no pleasing some people. They are nits :-))



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From: "Acee Lindem (acee)" <acee@cisco.com>
To: Warren Kumari <warren@kumari.net>, The IESG <iesg@ietf.org>
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From nobody Wed Feb  7 14:31:34 2018
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Subject: [Idr] I-D Action: draft-ietf-idr-bgp-prefix-sid-14.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Inter-Domain Routing WG of the IETF.

        Title           : Segment Routing Prefix SID extensions for BGP
        Authors         : Stefano Previdi
                          Clarence Filsfils
                          Acee Lindem
                          Arjun Sreekantiah
                          Hannes Gredler
	Filename        : draft-ietf-idr-bgp-prefix-sid-14.txt
	Pages           : 17
	Date            : 2018-02-07

Abstract:
   Segment Routing (SR) architecture allows a node to steer a packet
   flow through any topological path and service chain by leveraging
   source routing.  The ingress node prepends an SR header to a packet
   containing a set of segment identifiers (SID).  Each SID represents a
   topological or a service-based instruction.  Per-flow state is
   maintained only on the ingress node of the SR domain.

   This document defines an optional, transitive BGP attribute for
   announcing BGP Prefix Segment Identifiers (BGP Prefix-SID)
   information.



The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-idr-bgp-prefix-sid/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-idr-bgp-prefix-sid-14
https://datatracker.ietf.org/doc/html/draft-ietf-idr-bgp-prefix-sid-14

A diff from the previous version is available at:
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Warren Kumari has entered the following ballot position for
draft-ietf-idr-bgp-prefix-sid-14: No Objection

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

Thanks for Acee for addressing my DISCUSS - cleared.

Major(ish) issue:
Section 5.  Advertising BGP Prefix-SID Attribute
   "The BGP Prefix-SID attribute MAY be attached to labeled BGP prefixes
   (IPv4/IPv6) [RFC8277] or to IPv6 unicast prefixes [RFC4760].  In
   order to prevent distribution of the BGP Prefix-SID attribute beyond
   its intended scope of applicability, attribute filtering SHOULD be
   deployed."
Thank you for including this -- however, as I'm sure you know, the state of BGP
filtering in the wild is, er, poor. Can you please provide some additional
guidance? For example, could you include an appendix with examples? Or simply a
bit more text on determining the scope of applicability? Apologies if I missed
this, but should this by default be filtered on eBGP sessions? The included
text is a great start, but some more (so people don't miss it and shoot
themselves in the foot would be much appreciated.

Nits:
Section 1:
" the SID consists of a label while when SR is applied to the IPv6 dataplane
the SID consists of an IPv6 address." I think that "of a label, while" would
make this much more readable. It took me a few tries without it.

Section 4:
" A BGP speaker receiving a BGP Prefix-SID attribute from an EBGP
   neighbor residing outside the boundaries of the SR domain, MUST
   discard the attribute unless it is configured to accept the attribute
   from the EBGP neighbor."
Spurious comma between domain and MUST (yeah, I want a comma above, I don't
want one here, no pleasing some people. They are nits :-))



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From: Warren Kumari <warren@kumari.net>
Date: Wed, 7 Feb 2018 17:36:42 -0500
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Subject: Re: [Idr] Warren Kumari's Discuss on draft-ietf-idr-bgp-prefix-sid-13: (with DISCUSS and COMMENT)
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On Wed, Feb 7, 2018 at 5:22 PM, Acee Lindem (acee) <acee@cisco.com> wrote:
> Hi Warren,
>
> =EF=BB=BFOn 2/7/18, 10:43 AM, "Warren Kumari" <warren@kumari.net> wrote:
>
>     Warren Kumari has entered the following ballot position for
>     draft-ietf-idr-bgp-prefix-sid-13: Discuss
>
>     When responding, please keep the subject line intact and reply to all
>     email addresses included in the To and CC lines. (Feel free to cut th=
is
>     introductory paragraph, however.)
>
>
>     Please refer to https://www.ietf.org/iesg/statement/discuss-criteria.=
html
>     for more information about IESG DISCUSS and COMMENT positions.
>
>
>     The document, along with other ballot positions, can be found here:
>     https://datatracker.ietf.org/doc/draft-ietf-idr-bgp-prefix-sid/
>
>
>
>     ---------------------------------------------------------------------=
-
>     DISCUSS:
>     ---------------------------------------------------------------------=
-
>
>     I had the same logging question an Alexey and guessed (perhaps incorr=
ectly)
>     that this was to try and prevent DoSing the logging infrastructure by=
 sending
>     too many log messages. If this is the reason, I think that it should =
be better
>     spelled out -- and if this is *not* the reason, I think that there ne=
eds to be
>     a good explanation. Note that I will happy clear as soon as someone s=
ays "Yeah,
>     we've heard and will deal with this" -- I think that this is a fine d=
ocument
>     and that addressing this issue should be a minor change, but importan=
t enough
>     for operational reasons that it needs to be discussed.
>
> I've added this to the "Security Considerations". This is so common, ther=
e probably should be boilerplate text for it.
>
> +    To prevent a Denial-of-Service (DoS) or Distributed-Denial-of-Servic=
e
> +    (DDoS) attack due to excessive BGP updates with an unacceptable BGP
> +    Prefix-SID attribute, message rate-limiting as well as suppression o=
f
> +    duplicate messages SHOULD be deployed.
> +
>

Thank you.
I agree, this is a really common issue / point, some sort of bcp for
designing logging in protocols that we could reference would be
awesome.

I've cleared my DISCUSS, thanks for addressing it so quickly.


>
>
>     ---------------------------------------------------------------------=
-
>     COMMENT:
>     ---------------------------------------------------------------------=
-
>
>     Major(ish) issue:
>     Section 5.  Advertising BGP Prefix-SID Attribute
>        "The BGP Prefix-SID attribute MAY be attached to labeled BGP prefi=
xes
>        (IPv4/IPv6) [RFC8277] or to IPv6 unicast prefixes [RFC4760].  In
>        order to prevent distribution of the BGP Prefix-SID attribute beyo=
nd
>        its intended scope of applicability, attribute filtering SHOULD be
>        deployed."
>     Thank you for including this -- however, as I'm sure you know, the st=
ate of BGP
>     filtering in the wild is, er, poor. Can you please provide some addit=
ional
>     guidance? For example, could you include an appendix with examples? O=
r simply a
>     bit more text on determining the scope of applicability? Apologies if=
 I missed
>     this, but should this by default be filtered on eBGP sessions? The in=
cluded
>     text is a great start, but some more (so people don't miss it and sho=
ot
>     themselves in the foot would be much appreciated.
>
> You realize that local BGP policy has been traditionally not been standar=
dized and there have been books written on the subject.
>  Also, we have a whole WG, i.e., GROW to take on topics such as these.

Yup, I think that you are making my point for me :-P - having
additional guidance from the people building to protocol can't hurt.


>  I have made the statement more explicit.
>
>      (IPv4/IPv6) [RFC8277] or to IPv6 unicast prefixes [RFC4760].  In
>      order to prevent distribution of the BGP Prefix-SID attribute beyond
>      its intended scope of applicability, attribute filtering SHOULD be
> !    deployed to remove the BGP Prefix-SID attribute at the adminstrative
> !    boundary of the segment routing domain.
>
>

Thank you. I was hoping for even more (so that we can point at people
and knock their heads together when they leak) but this was only a
comment -- thanks for addressing it, I'm fine with your response.


>     Nits:
>     Section 1:
>     " the SID consists of a label while when SR is applied to the IPv6 da=
taplane
>     the SID consists of an IPv6 address." I think that "of a label, while=
" would
>     make this much more readable. It took me a few tries without it.
>
>     Section 4:
>     " A BGP speaker receiving a BGP Prefix-SID attribute from an EBGP
>        neighbor residing outside the boundaries of the SR domain, MUST
>        discard the attribute unless it is configured to accept the attrib=
ute
>        from the EBGP neighbor."
>     Spurious comma between domain and MUST (yeah, I want a comma above, I=
 don't
>     want one here, no pleasing some people. They are nits :-))
>
> I agree with both and have made the changes. I was not the original edito=
r of this document.


Thanks,
W

>
> Thanks,
> Acee
>
>
>
>
>



--=20
I don't think the execution is relevant when it was obviously a bad
idea in the first place.
This is like putting rabid weasels in your pants, and later expressing
regret at having chosen those particular rabid weasels and that pair
of pants.
   ---maf


From nobody Wed Feb  7 14:55:31 2018
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Subject: [Idr] Ben Campbell's No Objection on draft-ietf-idr-bgp-prefix-sid-14: (with COMMENT)
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----------------------------------------------------------------------
COMMENT:
----------------------------------------------------------------------

(The document has been updated since I made my review notes. Apologies if any
of my comments no longer apply.)

Substantive:

- 1: I agree with Alissa's comment about finding a less controversial example
than DPI.

-9: last paragraph: Can you offer a citation for the "standard BGP mechansism
(filters)"? I assume they are in one of the documents cited in the first
paragraph of this section, but it would help to cite the specific document and
section.

Editorial and nits:

- Abstract and section 1: Both are missing an article (probably "The")  before
"Segment Routing (SR) architecture"



From nobody Wed Feb  7 14:57:50 2018
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----------------------------------------------------------------------
COMMENT:
----------------------------------------------------------------------

Please expand "AFI/SAFI" on first use.



From nobody Thu Feb  8 06:21:04 2018
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To: Eric Rescorla <ekr@rtfm.com>, "Acee Lindem (acee)" <acee@cisco.com>
Cc: Susan Hares <shares@ndzh.com>, "draft-ietf-idr-bgp-prefix-sid@ietf.org" <draft-ietf-idr-bgp-prefix-sid@ietf.org>,  "idr-chairs@ietf.org" <idr-chairs@ietf.org>, The IESG <iesg@ietf.org>, "idr@ietf.org" <idr@ietf.org>
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Subject: Re: [Idr] Eric Rescorla's No Objection on draft-ietf-idr-bgp-prefix-sid-13: (with COMMENT)
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On February 6, 2018 at 9:37:26 PM, Eric Rescorla (ekr@rtfm.com) wrote:

Acee:

Hi!

The -13 version references RFC 8277 rather than RFC 3107 which has an
extensive "Security Considerations" section relative to MPLS label
advertisement. Do you want me to add that there are no security
considerations unique to [RFC8205]?


I think that would be helpful.

Mostly a nit=E2=80=A6.   The text you added is this:

   When advertised using BGPsec as described in [RFC8205], the BGP

   Prefix-SID attribute doesn't impose any unique security

   considerations.
=E2=80=A6which is correct.  However, I think that, as long as we=E2=80=99re=
 mentioning
BGPsec, we should point out that the reason it doesn=E2=80=99t change anyth=
ing is
because this new attribute is not protected by the BGPsec signatures (just
as all other attributes, except the AS_PATH).  Proposal; add something like
this to the end of the text above:

   The BGP Prefix-SID attribute is not protected by the BGPsec signatures.

Thanks!

Alvaro.

--001a113b047cbacc860564b41ed4
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Content-Transfer-Encoding: quoted-printable

<html><head><style>body{font-family:Helvetica,Arial;font-size:13px}</style>=
</head><body style=3D"word-wrap:break-word"><div id=3D"bloop_customfont" st=
yle=3D"color:rgb(0,0,0);margin:0px"><font face=3D"Helvetica">On February 6,=
 2018 at 9:37:26 PM, Eric Rescorla (<a href=3D"mailto:ekr@rtfm.com">ekr@rtf=
m.com</a>) wrote:</font></div><div id=3D"bloop_customfont" style=3D"color:r=
gb(0,0,0);margin:0px"><font face=3D"Helvetica"><br></font></div><div id=3D"=
bloop_customfont" style=3D"color:rgb(0,0,0);margin:0px"><font face=3D"Helve=
tica">Acee:</font></div><div id=3D"bloop_customfont" style=3D"color:rgb(0,0=
,0);margin:0px"><font face=3D"Helvetica"><br></font></div><div id=3D"bloop_=
customfont" style=3D"color:rgb(0,0,0);margin:0px"><font face=3D"Helvetica">=
Hi!</font></div><div id=3D"bloop_customfont" style=3D"color:rgb(0,0,0);marg=
in:0px"><font face=3D"Helvetica"><br></font></div> <div><blockquote type=3D=
"cite" class=3D"clean_bq" style=3D"font-variant-caps:normal;letter-spacing:=
normal;text-align:start;text-indent:0px;text-transform:none;white-space:nor=
mal;word-spacing:0px"><span><div><font face=3D"Helvetica"><blockquote class=
=3D"clean_bq" style=3D"font-variant-caps:normal;letter-spacing:normal;text-=
align:start;text-indent:0px;text-transform:none;white-space:normal;word-spa=
cing:0px">The -13 version references RFC 8277 rather than RFC 3107 which ha=
s an extensive &quot;Security Considerations&quot; section relative to MPLS=
 label advertisement. Do you want me to add that there are no security cons=
iderations unique to [RFC8205]?<br></blockquote><div style=3D"color:rgb(0,0=
,0);font-variant-caps:normal;letter-spacing:normal;text-align:start;text-in=
dent:0px;text-transform:none;white-space:normal;word-spacing:0px"><br></div=
><div style=3D"color:rgb(0,0,0);font-variant-caps:normal;letter-spacing:nor=
mal;text-align:start;text-indent:0px;text-transform:none;white-space:normal=
;word-spacing:0px">I think that would be helpful.</div></font></div></span>=
</blockquote></div><p><font face=3D"Helvetica">Mostly a nit=E2=80=A6. =C2=
=A0 The text you added is this:</font></p><p><font face=3D"Courier">=C2=A0 =
=C2=A0When advertised using BGPsec as described in [RFC8205], the BGP</font=
></p><p><font face=3D"Courier">=C2=A0 =C2=A0Prefix-SID attribute doesn&#39;=
t impose any unique security</font></p><p><font face=3D"Courier">=C2=A0 =C2=
=A0considerations.</font></p><div><font face=3D"Helvetica">=E2=80=A6which i=
s correct.=C2=A0 However, I think that, as long as we=E2=80=99re mentioning=
 BGPsec, we should point out that the reason it doesn=E2=80=99t change anyt=
hing is because this new attribute is not protected by the BGPsec signature=
s (just as all other attributes, except the AS_PATH).=C2=A0 Proposal; add s=
omething like this to the end of the text above:</font></div><div><font fac=
e=3D"Helvetica"><br></font></div><div><font face=3D"Helvetica">=C2=A0 =C2=
=A0The BGP Prefix-SID attribute is not protected by the BGPsec signatures.<=
/font></div><div><font face=3D"Helvetica"><br></font></div><div><span style=
=3D"font-family:Helvetica">Thanks!</span></div><div><font face=3D"Helvetica=
"><br></font></div><div><font face=3D"Helvetica">Alvaro.</font></div><div><=
font face=3D"Helvetica"><br class=3D"Apple-interchange-newline"></font></di=
v> <div id=3D"bloop_sign_1518095684120965120" class=3D"bloop_sign"></div></=
body></html>

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Cc: Eric Rescorla <ekr@rtfm.com>, "Acee Lindem (acee)" <acee@cisco.com>,  "idr-chairs@ietf.org" <idr-chairs@ietf.org>, "idr@ietf.org" <idr@ietf.org>,  "draft-ietf-idr-bgp-prefix-sid@ietf.org" <draft-ietf-idr-bgp-prefix-sid@ietf.org>, Susan Hares <shares@ndzh.com>,  The IESG <iesg@ietf.org>
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Subject: Re: [Idr] Eric Rescorla's No Objection on draft-ietf-idr-bgp-prefix-sid-13: (with COMMENT)
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Alvaro,

When thinking about security let's think about entire network view.

Today you don't put into FIB (maybe with the exception of
encapsulation/tunnel attribute) any forwarding information into data plane
from BGP attributes - hence whatever protection is offered say by BGPSec
the NLRI which actually go into data plane are protected (in some way).

Statement that BGPSec does not protect attributes is actually contrary to
state that the network security does not get any weaker with this proposal.

Of course for SR the right argument may be to state that this is to be used
only under single administrative domain, but stating that this proposal
does not change anything as attributes are not protected is just not
correct.

Best,
R.



On Thu, Feb 8, 2018 at 3:20 PM, Alvaro Retana <aretana.ietf@gmail.com>
wrote:

> On February 6, 2018 at 9:37:26 PM, Eric Rescorla (ekr@rtfm.com) wrote:
>
> Acee:
>
> Hi!
>
> The -13 version references RFC 8277 rather than RFC 3107 which has an
> extensive "Security Considerations" section relative to MPLS label
> advertisement. Do you want me to add that there are no security
> considerations unique to [RFC8205]?
>
>
> I think that would be helpful.
>
> Mostly a nit=E2=80=A6.   The text you added is this:
>
>    When advertised using BGPsec as described in [RFC8205], the BGP
>
>    Prefix-SID attribute doesn't impose any unique security
>
>    considerations.
> =E2=80=A6which is correct.  However, I think that, as long as we=E2=80=99=
re mentioning
> BGPsec, we should point out that the reason it doesn=E2=80=99t change any=
thing is
> because this new attribute is not protected by the BGPsec signatures (jus=
t
> as all other attributes, except the AS_PATH).  Proposal; add something li=
ke
> this to the end of the text above:
>
>    The BGP Prefix-SID attribute is not protected by the BGPsec signatures=
.
>
> Thanks!
>
> Alvaro.
>
>
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr
>
>

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<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small">Alvaro,</div><div class=3D"gmail_defaul=
t" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></d=
iv><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-s=
erif;font-size:small">When thinking about security let&#39;s think about en=
tire network view.</div><div class=3D"gmail_default" style=3D"font-family:a=
rial,helvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_de=
fault" style=3D"font-family:arial,helvetica,sans-serif;font-size:small">Tod=
ay you don&#39;t put into FIB (maybe with the exception of encapsulation/tu=
nnel attribute) any forwarding information into data plane from BGP attribu=
tes - hence whatever protection is offered say by BGPSec the NLRI which act=
ually go into data plane are protected (in some way).=C2=A0</div><div class=
=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-siz=
e:small"><br></div><div class=3D"gmail_default" style=3D"font-family:arial,=
helvetica,sans-serif;font-size:small">Statement that BGPSec does not protec=
t attributes is actually contrary to state that the network security does n=
ot get any weaker with this proposal.=C2=A0</div><div class=3D"gmail_defaul=
t" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></d=
iv><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-s=
erif;font-size:small">Of course for SR the right argument may be to state t=
hat this is to be used only under single administrative domain, but stating=
 that this proposal does not change anything as attributes are not protecte=
d is just not correct.=C2=A0</div><div class=3D"gmail_default" style=3D"fon=
t-family:arial,helvetica,sans-serif;font-size:small"><br></div><div class=
=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-siz=
e:small">Best,</div><div class=3D"gmail_default" style=3D"font-family:arial=
,helvetica,sans-serif;font-size:small">R.</div><div class=3D"gmail_default"=
 style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></div=
><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-ser=
if;font-size:small"><br></div></div><div class=3D"gmail_extra"><br><div cla=
ss=3D"gmail_quote">On Thu, Feb 8, 2018 at 3:20 PM, Alvaro Retana <span dir=
=3D"ltr">&lt;<a href=3D"mailto:aretana.ietf@gmail.com" target=3D"_blank">ar=
etana.ietf@gmail.com</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_qu=
ote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex=
"><div style=3D"word-wrap:break-word"><div id=3D"m_6543769552559856684bloop=
_customfont" style=3D"color:rgb(0,0,0);margin:0px"><font face=3D"Helvetica"=
>On February 6, 2018 at 9:37:26 PM, Eric Rescorla (<a href=3D"mailto:ekr@rt=
fm.com" target=3D"_blank">ekr@rtfm.com</a>) wrote:</font></div><div id=3D"m=
_6543769552559856684bloop_customfont" style=3D"color:rgb(0,0,0);margin:0px"=
><font face=3D"Helvetica"><br></font></div><div id=3D"m_6543769552559856684=
bloop_customfont" style=3D"color:rgb(0,0,0);margin:0px"><font face=3D"Helve=
tica">Acee:</font></div><div id=3D"m_6543769552559856684bloop_customfont" s=
tyle=3D"color:rgb(0,0,0);margin:0px"><font face=3D"Helvetica"><br></font></=
div><div id=3D"m_6543769552559856684bloop_customfont" style=3D"color:rgb(0,=
0,0);margin:0px"><font face=3D"Helvetica">Hi!</font></div><span class=3D"">=
<div id=3D"m_6543769552559856684bloop_customfont" style=3D"color:rgb(0,0,0)=
;margin:0px"><font face=3D"Helvetica"><br></font></div> <div><blockquote ty=
pe=3D"cite" class=3D"m_6543769552559856684clean_bq" style=3D"font-variant-c=
aps:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-tran=
sform:none;white-space:normal;word-spacing:0px"><span><div><font face=3D"He=
lvetica"><blockquote class=3D"m_6543769552559856684clean_bq" style=3D"font-=
variant-caps:normal;letter-spacing:normal;text-align:start;text-indent:0px;=
text-transform:none;white-space:normal;word-spacing:0px">The -13 version re=
ferences RFC 8277 rather than RFC 3107 which has an extensive &quot;Securit=
y Considerations&quot; section relative to MPLS label advertisement. Do you=
 want me to add that there are no security considerations unique to [RFC820=
5]?<br></blockquote><div style=3D"color:rgb(0,0,0);font-variant-caps:normal=
;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none=
;white-space:normal;word-spacing:0px"><br></div><div style=3D"color:rgb(0,0=
,0);font-variant-caps:normal;letter-spacing:normal;text-align:start;text-in=
dent:0px;text-transform:none;white-space:normal;word-spacing:0px">I think t=
hat would be helpful.</div></font></div></span></blockquote></div></span><p=
><font face=3D"Helvetica">Mostly a nit=E2=80=A6. =C2=A0 The text you added =
is this:</font></p><p><font face=3D"Courier">=C2=A0 =C2=A0When advertised u=
sing BGPsec as described in [RFC8205], the BGP</font></p><p><font face=3D"C=
ourier">=C2=A0 =C2=A0Prefix-SID attribute doesn&#39;t impose any unique sec=
urity</font></p><p><font face=3D"Courier">=C2=A0 =C2=A0considerations.</fon=
t></p><div><font face=3D"Helvetica">=E2=80=A6which is correct.=C2=A0 Howeve=
r, I think that, as long as we=E2=80=99re mentioning BGPsec, we should poin=
t out that the reason it doesn=E2=80=99t change anything is because this ne=
w attribute is not protected by the BGPsec signatures (just as all other at=
tributes, except the AS_PATH).=C2=A0 Proposal; add something like this to t=
he end of the text above:</font></div><div><font face=3D"Helvetica"><br></f=
ont></div><div><font face=3D"Helvetica">=C2=A0 =C2=A0The BGP Prefix-SID att=
ribute is not protected by the BGPsec signatures.</font></div><div><font fa=
ce=3D"Helvetica"><br></font></div><div><span style=3D"font-family:Helvetica=
">Thanks!</span></div><span class=3D"HOEnZb"><font color=3D"#888888"><div><=
font face=3D"Helvetica"><br></font></div><div><font face=3D"Helvetica">Alva=
ro.</font></div><div><font face=3D"Helvetica"><br class=3D"m_65437695525598=
56684Apple-interchange-newline"></font></div> <div id=3D"m_6543769552559856=
684bloop_sign_1518095684120965120" class=3D"m_6543769552559856684bloop_sign=
"></div></font></span></div>
<br>______________________________<wbr>_________________<br>
Idr mailing list<br>
<a href=3D"mailto:Idr@ietf.org">Idr@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/idr" rel=3D"noreferrer" ta=
rget=3D"_blank">https://www.ietf.org/mailman/<wbr>listinfo/idr</a><br>
<br></blockquote></div><br></div>

--001a114184d46978fc0564b43ee7--


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To: Adam Roach <adam@nostrum.com>, The IESG <iesg@ietf.org>
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Thread-Topic: Adam Roach's No Objection on draft-ietf-idr-bgp-prefix-sid-14: (with COMMENT)
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From: "Acee Lindem (acee)" <acee@cisco.com>
To: Ben Campbell <ben@nostrum.com>, The IESG <iesg@ietf.org>
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Thread-Topic: Ben Campbell's No Objection on draft-ietf-idr-bgp-prefix-sid-14: (with COMMENT)
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From: Alvaro Retana <aretana.ietf@gmail.com>
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To: Robert Raszuk <robert@raszuk.net>
Cc: Susan Hares <shares@ndzh.com>, "Acee Lindem (acee)" <acee@cisco.com>,  "idr-chairs@ietf.org" <idr-chairs@ietf.org>, Eric Rescorla <ekr@rtfm.com>,  "draft-ietf-idr-bgp-prefix-sid@ietf.org" <draft-ietf-idr-bgp-prefix-sid@ietf.org>, "idr@ietf.org" <idr@ietf.org>,  The IESG <iesg@ietf.org>
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Subject: Re: [Idr] Eric Rescorla's No Objection on draft-ietf-idr-bgp-prefix-sid-13: (with COMMENT)
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--001a1141c39e51d08b0564b6e192
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Robert:

I think I got lost=E2=80=A6what are you trying to get to?

Are you saying that we shouldn=E2=80=99t add the extra sentence?  Do you th=
ink
something else needs to be said here?  Are you proposing new
security-related work?

Thanks!

Alvaro.

On February 8, 2018 at 9:29:48 AM, Robert Raszuk (robert@raszuk.net) wrote:

Alvaro,

When thinking about security let's think about entire network view.

Today you don't put into FIB (maybe with the exception of
encapsulation/tunnel attribute) any forwarding information into data plane
from BGP attributes - hence whatever protection is offered say by BGPSec
the NLRI which actually go into data plane are protected (in some way).

Statement that BGPSec does not protect attributes is actually contrary to
state that the network security does not get any weaker with this proposal.

Of course for SR the right argument may be to state that this is to be used
only under single administrative domain, but stating that this proposal
does not change anything as attributes are not protected is just not
correct.

Best,
R.



On Thu, Feb 8, 2018 at 3:20 PM, Alvaro Retana <aretana.ietf@gmail.com>
wrote:

> On February 6, 2018 at 9:37:26 PM, Eric Rescorla (ekr@rtfm.com) wrote:
>
> Acee:
>
> Hi!
>
> The -13 version references RFC 8277 rather than RFC 3107 which has an
> extensive "Security Considerations" section relative to MPLS label
> advertisement. Do you want me to add that there are no security
> considerations unique to [RFC8205]?
>
>
> I think that would be helpful.
>
> Mostly a nit=E2=80=A6.   The text you added is this:
>
>    When advertised using BGPsec as described in [RFC8205], the BGP
>
>    Prefix-SID attribute doesn't impose any unique security
>
>    considerations.
> =E2=80=A6which is correct.  However, I think that, as long as we=E2=80=99=
re mentioning
> BGPsec, we should point out that the reason it doesn=E2=80=99t change any=
thing is
> because this new attribute is not protected by the BGPsec signatures (jus=
t
> as all other attributes, except the AS_PATH).  Proposal; add something li=
ke
> this to the end of the text above:
>
>    The BGP Prefix-SID attribute is not protected by the BGPsec signatures=
.
>
> Thanks!
>
> Alvaro.
>
>
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr
>
>

--001a1141c39e51d08b0564b6e192
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Content-Transfer-Encoding: quoted-printable

<html><head><style>body{font-family:Helvetica,Arial;font-size:13px}</style>=
</head><body style=3D"word-wrap:break-word"><div id=3D"bloop_customfont" st=
yle=3D"font-family:Helvetica,Arial;font-size:13px;color:rgba(0,0,0,1.0);mar=
gin:0px;line-height:auto">Robert:</div><div id=3D"bloop_customfont" style=
=3D"font-family:Helvetica,Arial;font-size:13px;color:rgba(0,0,0,1.0);margin=
:0px;line-height:auto"><br></div><div id=3D"bloop_customfont" style=3D"font=
-family:Helvetica,Arial;font-size:13px;color:rgba(0,0,0,1.0);margin:0px;lin=
e-height:auto">I think I got lost=E2=80=A6what are you trying to get to?</d=
iv><div id=3D"bloop_customfont" style=3D"font-family:Helvetica,Arial;font-s=
ize:13px;color:rgba(0,0,0,1.0);margin:0px;line-height:auto"><br></div><div =
id=3D"bloop_customfont" style=3D"font-family:Helvetica,Arial;font-size:13px=
;color:rgba(0,0,0,1.0);margin:0px;line-height:auto">Are you saying that we =
shouldn=E2=80=99t add the extra sentence?=C2=A0 Do you think something else=
 needs to be said here?=C2=A0 Are you proposing new security-related work?<=
/div><div id=3D"bloop_customfont" style=3D"font-family:Helvetica,Arial;font=
-size:13px;color:rgba(0,0,0,1.0);margin:0px;line-height:auto"><br></div><di=
v id=3D"bloop_customfont" style=3D"font-family:Helvetica,Arial;font-size:13=
px;color:rgba(0,0,0,1.0);margin:0px;line-height:auto">Thanks!</div><div id=
=3D"bloop_customfont" style=3D"font-family:Helvetica,Arial;font-size:13px;c=
olor:rgba(0,0,0,1.0);margin:0px;line-height:auto"><br></div><div id=3D"bloo=
p_customfont" style=3D"font-family:Helvetica,Arial;font-size:13px;color:rgb=
a(0,0,0,1.0);margin:0px;line-height:auto">Alvaro.</div> <br><p class=3D"air=
mail_on">On February 8, 2018 at 9:29:48 AM, Robert Raszuk (<a href=3D"mailt=
o:robert@raszuk.net">robert@raszuk.net</a>) wrote:</p> <blockquote type=3D"=
cite" class=3D"clean_bq"><span><div><div></div><div>


<title></title>


<div dir=3D"ltr">
<div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-seri=
f;font-size:small">
Alvaro,</div>
<div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-seri=
f;font-size:small">
<br></div>
<div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-seri=
f;font-size:small">When
thinking about security let&#39;s think about entire network
view.</div>
<div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-seri=
f;font-size:small">
<br></div>
<div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-seri=
f;font-size:small">Today you
don&#39;t put into FIB (maybe with the exception of
encapsulation/tunnel attribute) any forwarding information into
data plane from BGP attributes - hence whatever protection is
offered say by BGPSec the NLRI which actually go into data plane
are protected (in some way).=C2=A0</div>
<div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-seri=
f;font-size:small">
<br></div>
<div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-seri=
f;font-size:small">Statement
that BGPSec does not protect attributes is actually contrary to
state that the network security does not get any weaker with this
proposal.=C2=A0</div>
<div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-seri=
f;font-size:small">
<br></div>
<div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-seri=
f;font-size:small">Of course
for SR the right argument may be to state that this is to be used
only under single administrative domain, but stating that this
proposal does not change anything as attributes are not protected
is just not correct.=C2=A0</div>
<div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-seri=
f;font-size:small">
<br></div>
<div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-seri=
f;font-size:small">
Best,</div>
<div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-seri=
f;font-size:small">R.</div>
<div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-seri=
f;font-size:small">
<br></div>
<div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-seri=
f;font-size:small">
<br></div>
</div>
<div class=3D"gmail_extra"><br>
<div class=3D"gmail_quote">On Thu, Feb 8, 2018 at 3:20 PM, Alvaro
Retana <span dir=3D"ltr">&lt;<a href=3D"mailto:aretana.ietf@gmail.com" targ=
et=3D"_blank">aretana.ietf@gmail.com</a>&gt;</span> wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
<div style=3D"word-wrap:break-word">
<div id=3D"m_6543769552559856684bloop_customfont" style=3D"color:rgb(0,0,0)=
;margin:0px"><font face=3D"Helvetica">On February 6,
2018 at 9:37:26 PM, Eric Rescorla (<a href=3D"mailto:ekr@rtfm.com" target=
=3D"_blank">ekr@rtfm.com</a>) wrote:</font></div>
<div id=3D"m_6543769552559856684bloop_customfont" style=3D"color:rgb(0,0,0)=
;margin:0px"><font face=3D"Helvetica"><br></font></div>
<div id=3D"m_6543769552559856684bloop_customfont" style=3D"color:rgb(0,0,0)=
;margin:0px"><font face=3D"Helvetica">Acee:</font></div>
<div id=3D"m_6543769552559856684bloop_customfont" style=3D"color:rgb(0,0,0)=
;margin:0px"><font face=3D"Helvetica"><br></font></div>
<div id=3D"m_6543769552559856684bloop_customfont" style=3D"color:rgb(0,0,0)=
;margin:0px"><font face=3D"Helvetica">Hi!</font></div>
<div id=3D"m_6543769552559856684bloop_customfont" style=3D"color:rgb(0,0,0)=
;margin:0px"><span class=3D""><font face=3D"Helvetica"><br></font></span></=
div>
<div>
<blockquote type=3D"cite" class=3D"m_6543769552559856684clean_bq" style=3D"=
font-variant-caps:normal;letter-spacing:normal;text-align:start;text-indent=
:0px;text-transform:none;white-space:normal;word-spacing:0px">
<div>
<blockquote class=3D"m_6543769552559856684clean_bq" style=3D"font-variant-c=
aps:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-tran=
sform:none;white-space:normal;word-spacing:0px">
<span class=3D""><font face=3D"Helvetica">The -13 version references
RFC 8277 rather than RFC 3107 which has an extensive &quot;Security
Considerations&quot; section relative to MPLS label advertisement. Do
you want me to add that there are no security considerations unique
to [RFC8205]?<br></font></span></blockquote>
<div style=3D"color:rgb(0,0,0);font-variant-caps:normal;letter-spacing:norm=
al;text-align:start;text-indent:0px;text-transform:none;white-space:normal;=
word-spacing:0px">
<span class=3D""><font face=3D"Helvetica"><br></font></span></div>
<div style=3D"color:rgb(0,0,0);font-variant-caps:normal;letter-spacing:norm=
al;text-align:start;text-indent:0px;text-transform:none;white-space:normal;=
word-spacing:0px">
<span class=3D""><font face=3D"Helvetica">I think that would be
helpful.</font></span></div>
</div>
</blockquote>
</div>
<p><font face=3D"Helvetica">Mostly a nit=E2=80=A6. =C2=A0 The text you adde=
d
is this:</font></p>
<p><font face=3D"Courier">=C2=A0 =C2=A0When advertised using BGPsec
as described in [RFC8205], the BGP</font></p>
<p><font face=3D"Courier">=C2=A0 =C2=A0Prefix-SID attribute doesn&#39;t
impose any unique security</font></p>
<p><font face=3D"Courier">=C2=A0 =C2=A0considerations.</font></p>
<div><font face=3D"Helvetica">=E2=80=A6which is correct.=C2=A0 However, I
think that, as long as we=E2=80=99re mentioning BGPsec, we should point out
that the reason it doesn=E2=80=99t change anything is because this new
attribute is not protected by the BGPsec signatures (just as all
other attributes, except the AS_PATH).=C2=A0 Proposal; add
something like this to the end of the text above:</font></div>
<div><font face=3D"Helvetica"><br></font></div>
<div><font face=3D"Helvetica">=C2=A0 =C2=A0The BGP Prefix-SID
attribute is not protected by the BGPsec signatures.</font></div>
<div><font face=3D"Helvetica"><br></font></div>
<div><span style=3D"font-family:Helvetica">Thanks!</span></div>
<div><span class=3D"HOEnZb"><font color=3D"#888888"><font face=3D"Helvetica=
"><br></font></font></span></div>
<div><span class=3D"HOEnZb"><font color=3D"#888888"><font face=3D"Helvetica=
">Alvaro.</font></font></span></div>
<div><span class=3D"HOEnZb"><font color=3D"#888888"><font face=3D"Helvetica=
"><br class=3D"m_6543769552559856684Apple-interchange-newline"></font></fon=
t></span></div>
<div id=3D"m_6543769552559856684bloop_sign_1518095684120965120" class=3D"m_=
6543769552559856684bloop_sign"></div>
</div>
<br>
______________________________<wbr>_________________<br>
Idr mailing list<br>
<a href=3D"mailto:Idr@ietf.org">Idr@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/idr" rel=3D"noreferrer" ta=
rget=3D"_blank">https://www.ietf.org/mailman/<wbr>listinfo/idr</a><br>
<br></blockquote>
</div>
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From: "Acee Lindem (acee)" <acee@cisco.com>
To: Ben Campbell <ben@nostrum.com>, The IESG <iesg@ietf.org>
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From: "Acee Lindem (acee)" <acee@cisco.com>
To: Alvaro Retana <aretana.ietf@gmail.com>, Eric Rescorla <ekr@rtfm.com>
CC: Susan Hares <shares@ndzh.com>, "draft-ietf-idr-bgp-prefix-sid@ietf.org" <draft-ietf-idr-bgp-prefix-sid@ietf.org>, "idr-chairs@ietf.org" <idr-chairs@ietf.org>, The IESG <iesg@ietf.org>, "idr@ietf.org" <idr@ietf.org>
Thread-Topic: Eric Rescorla's No Objection on draft-ietf-idr-bgp-prefix-sid-13: (with COMMENT)
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Cc: The IESG <iesg@ietf.org>, "draft-ietf-idr-bgp-prefix-sid@ietf.org" <draft-ietf-idr-bgp-prefix-sid@ietf.org>, Susan Hares <shares@ndzh.com>, "aretana.ietf@gmail.com" <aretana.ietf@gmail.com>, "idr-chairs@ietf.org" <idr-chairs@ietf.org>, "idr@ietf.org" <idr@ietf.org>
To: "Acee Lindem (acee)" <acee@cisco.com>
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Subject: Re: [Idr] Ben Campbell's No Objection on draft-ietf-idr-bgp-prefix-sid-14: (with COMMENT)
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> On Feb 8, 2018, at 11:36 AM, Acee Lindem (acee) <acee@cisco.com> =
wrote:
>=20
> Hi Ben,
>=20
> =EF=BB=BFOn 2/7/18, 5:55 PM, "Ben Campbell" <ben@nostrum.com> wrote:
>=20
>    Ben Campbell has entered the following ballot position for
>    draft-ietf-idr-bgp-prefix-sid-14: No Objection
>=20
>    When responding, please keep the subject line intact and reply to =
all
>    email addresses included in the To and CC lines. (Feel free to cut =
this
>    introductory paragraph, however.)
>=20
>=20
>    Please refer to =
https://www.ietf.org/iesg/statement/discuss-criteria.html
>    for more information about IESG DISCUSS and COMMENT positions.
>=20
>=20
>    The document, along with other ballot positions, can be found here:
>    https://datatracker.ietf.org/doc/draft-ietf-idr-bgp-prefix-sid/
>=20
>=20
>=20
>    =
----------------------------------------------------------------------
>    COMMENT:
>    =
----------------------------------------------------------------------
>=20
>    (The document has been updated since I made my review notes. =
Apologies if any
>    of my comments no longer apply.)
>=20
>    Substantive:
>=20
>    - 1: I agree with Alissa's comment about finding a less =
controversial example
>    than DPI.
>=20
> It seems most service functions are controversial to at least =
somebody. I've changed it to "give the packet prioritized queuing=E2=80=9D=
.

That WFM. (If that=E2=80=99s controversial to someone else, I will leave =
it to them to complain :-) )

>=20
>=20
>    -9: last paragraph: Can you offer a citation for the "standard BGP =
mechansism
>    (filters)"? I assume they are in one of the documents cited in the =
first
>    paragraph of this section, but it would help to cite the specific =
document and
>    section.
>=20
> These mechanisms are not standardized. I've changed "standard" to =
"common=E2=80=9D.

That could use a sentence or two to elaborate. The fact that these =
common mechanisms are not standardized seems worthy of more than a =
passing mention.

[=E2=80=A6]


Thanks!

Ben.


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From nobody Sun Feb 11 07:45:29 2018
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From: Jeffrey Haas <jhaas@pfrc.org>
To: "Dongjie (Jimmy)" <jie.dong@huawei.com>, opsawg@ietf.org
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Subject: Re: [Idr] FW: WG LC for draft-ietf-opsawg-ipfix-bgp-community
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Authors,

Thanks for accommodating my prior comments on this draft.

I have one final issue to raise with the draft.  The information elements
for extended community and large community by nature of their size are of
type octetArray.  The draft correctly notes the expected size of each of
these elements; 8 and 12 respectively.

The draft provides no guidance for when each of these elements is NOT of the
expected size.

My recommendation is a small paragraph to the Operational Considerations
section:
"In the event that the bgpExtendedCommunity or bgpLargeCommunity Elements
are not of their expected sizes (8 and 12 octets, respectively), the
receiver SHOULD ignore them."

I'm not savvy with the general language wrapped around receiver procedure
for IPFIX these days, so a bit of additional verbiage might be expected for
appropriate draft boilerplate.  However, this is intended to protect
implementations using BGP logic from calling their parsing routines with
invalid lengths.

-- Jeff

On Mon, Jan 22, 2018 at 08:26:52AM +0000, Dongjie (Jimmy) wrote:
> Hi, 
> 
> Currently this BGP related draft is in WG LC in OPSAWG, their chairs suggest IDR to take a look at it, please send comments (if any) to OPSAWG mailing list.
> 
> Best regards,
> Jie
> 
> -----Original Message-----
> From: Tianran Zhou 
> Sent: Thursday, January 18, 2018 11:31 AM
> To: 'idr-chairs@ietf.org'
> Cc: 'opsawg-chairs@ietf.org'
> Subject: FW: WG LC for draft-ietf-opsawg-ipfix-bgp-community
> 
> Dear IDR Chairs,
> 
> The OPSAWG started a 2 week WG LC for the following draft:
> https://tools.ietf.org/html/draft-ietf-opsawg-ipfix-bgp-community-04
> 
> We got many comments and suggestions from IDR when this work is adopted. Now the authors believe the document is ready.
> We really appreciate more comments from this working group.
> 
> Could you please help to forward this information to the IDR mailing list?
> 
> Thanks,
> Tianran, as OPSAWG co-chair 
> 
> 
> -----Original Message-----
> From: OPSAWG [mailto:opsawg-bounces@ietf.org] On Behalf Of Tianran Zhou
> Sent: Thursday, January 18, 2018 11:07 AM
> To: opsawg@ietf.org
> Cc: opsawg-chairs@ietf.org
> Subject: [OPSAWG] WG LC for draft-ietf-opsawg-ipfix-bgp-community
> 
> Hi WG,
> 
> The authors of draft-ietf-opsawg-ipfix-bgp-community have posted the latest drafts to the mailing list, and believe that the document is ready for LC.
> 
> This starts a 2 week WG LC on
> https://tools.ietf.org/html/draft-ietf-opsawg-ipfix-bgp-community-04
> 
> Please read the above draft and send any issues, comments, or corrections to this mailing list. 
> All supports and concerns are welcome and helpful for the authors.
> 
> We are also looking for a document shepherd, best with operator background, to help the following procedures.  
> 
> The WG LC will close on Feb 1, 2018.
> Authors please indicate whether you are aware of any IPR for the draft.
> 
> Thanks,
> Tianran, as OPSAWG co-chair
> 
> _______________________________________________
> OPSAWG mailing list
> OPSAWG@ietf.org
> https://www.ietf.org/mailman/listinfo/opsawg
> 
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr


From nobody Sun Feb 11 17:28:26 2018
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Subject: [Idr] I-D Action: draft-ietf-idr-bgp-ipv6-rt-constrain-11.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Inter-Domain Routing WG of the IETF.

        Title           : IPv6 Extensions for Route Target Distribution
        Authors         : Keyur Patel
                          Robert Raszuk
                          Martin Djernaes
                          Jie Dong
                          Mach(Guoyi) Chen
	Filename        : draft-ietf-idr-bgp-ipv6-rt-constrain-11.txt
	Pages           : 6
	Date            : 2018-02-11

Abstract:
   The current route target distribution specification as described in
   [RFC 4684] defines Route Target NLRIs of maximum length of 12 bytes.
   The IPv6 specific Route Target extended community is defined in [RFC
   5701] as length of 20 bytes.  Since the current specification only
   supports prefixes of maximum length of 12 bytes, the lack of an IPv6
   specific Route Target reachability information may be a problem when
   an operator wants to use this application in a pure IPv6 environment.
   This document defines an extension that allows BGP to exchange longer
   length IPv6 Route Target prefixes.



The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-idr-bgp-ipv6-rt-constrain/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-idr-bgp-ipv6-rt-constrain-11
https://datatracker.ietf.org/doc/html/draft-ietf-idr-bgp-ipv6-rt-constrain-11

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-idr-bgp-ipv6-rt-constrain-11


Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/


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Subject: [Idr] I-D Action: draft-ietf-idr-next-hop-capability-02.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Inter-Domain Routing WG of the IETF.

        Title           : BGP Next-Hop dependent capabilities
        Authors         : Bruno Decraene
                          Kireeti Kompella
                          Wim Henderickx
	Filename        : draft-ietf-idr-next-hop-capability-02.txt
	Pages           : 10
	Date            : 2018-02-12

Abstract:
   RFC 5492 advertises the capabilities of the BGP peer.  When the BGP
   peer is not the same as the BGP Next-Hop, it is useful to also be
   able to advertise the capability of the BGP Next-Hop, in particular
   to advertise forwarding plane features.  This document defines a
   mechanism to advertise such BGP Next Hop dependent Capabilities.

   This document defines a new BGP non-transitive attribute to carry
   Next-Hop Capabilities.  This attribute is guaranteed to be deleted or
   updated when the BGP Next Hop is changed, in order to reflect the
   capabilities of the new BGP Next-Hop.

   This document also defines a Next-Hop capability to advertise the
   ability to process the MPLS Entropy Label as an egress LSR for all
   NLRI advertised in the BGP UPDATE.  It updates RFC 6790 with regard
   to this BGP signaling.



The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-idr-next-hop-capability/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-idr-next-hop-capability-02
https://datatracker.ietf.org/doc/html/draft-ietf-idr-next-hop-capability-02

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-idr-next-hop-capability-02


Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/


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From: <bruno.decraene@orange.com>
To: "idr@ietf.org" <idr@ietf.org>
Thread-Topic: [Idr] I-D Action: draft-ietf-idr-next-hop-capability-02.txt
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Subject: Re: [Idr] I-D Action: draft-ietf-idr-next-hop-capability-02.txt
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Just a refresh. No change.

Diff: https://tools.ietf.org/rfcdiff?url2=3Ddraft-ietf-idr-next-hop-capabil=
ity-02.txt

--Bruno

 > -----Original Message-----
 > From: Idr [mailto:idr-bounces@ietf.org] On Behalf Of internet-drafts@iet=
f.org
 > Sent: Monday, February 12, 2018 10:15 AM
 > To: i-d-announce@ietf.org
 > Cc: idr@ietf.org
 > Subject: [Idr] I-D Action: draft-ietf-idr-next-hop-capability-02.txt
 >=20
 >=20
 > A New Internet-Draft is available from the on-line Internet-Drafts direc=
tories.
 > This draft is a work item of the Inter-Domain Routing WG of the IETF.
 >=20
 >         Title           : BGP Next-Hop dependent capabilities
 >         Authors         : Bruno Decraene
 >                           Kireeti Kompella
 >                           Wim Henderickx
 > 	Filename        : draft-ietf-idr-next-hop-capability-02.txt
 > 	Pages           : 10
 > 	Date            : 2018-02-12
 >=20
 > Abstract:
 >    RFC 5492 advertises the capabilities of the BGP peer.  When the BGP
 >    peer is not the same as the BGP Next-Hop, it is useful to also be
 >    able to advertise the capability of the BGP Next-Hop, in particular
 >    to advertise forwarding plane features.  This document defines a
 >    mechanism to advertise such BGP Next Hop dependent Capabilities.
 >=20
 >    This document defines a new BGP non-transitive attribute to carry
 >    Next-Hop Capabilities.  This attribute is guaranteed to be deleted or
 >    updated when the BGP Next Hop is changed, in order to reflect the
 >    capabilities of the new BGP Next-Hop.
 >=20
 >    This document also defines a Next-Hop capability to advertise the
 >    ability to process the MPLS Entropy Label as an egress LSR for all
 >    NLRI advertised in the BGP UPDATE.  It updates RFC 6790 with regard
 >    to this BGP signaling.
 >=20
 >=20
 >=20
 > The IETF datatracker status page for this draft is:
 > https://datatracker.ietf.org/doc/draft-ietf-idr-next-hop-capability/
 >=20
 > There are also htmlized versions available at:
 > https://tools.ietf.org/html/draft-ietf-idr-next-hop-capability-02
 > https://datatracker.ietf.org/doc/html/draft-ietf-idr-next-hop-capability=
-02
 >=20
 > A diff from the previous version is available at:
 > https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-idr-next-hop-capability-02
 >=20
 >=20
 > Please note that it may take a couple of minutes from the time of submis=
sion
 > until the htmlized version and diff are available at tools.ietf.org.
 >=20
 > Internet-Drafts are also available by anonymous FTP at:
 > ftp://ftp.ietf.org/internet-drafts/
 >=20
 > _______________________________________________
 > Idr mailing list
 > Idr@ietf.org
 > https://www.ietf.org/mailman/listinfo/idr

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From: PVLR Pavana Murthy <pvlrpm@gmail.com>
Date: Mon, 12 Feb 2018 16:33:29 +0530
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Subject: [Idr] BGP Flowspec rules precedence order (RFC 5575)
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--001a1148dec0fbfb51056501d3b3
Content-Type: text/plain; charset="UTF-8"

Hello,
  In the RFC 5575, the following is given for the comparing the Flowspec
components of types other then prefix.

} else {
common =
MIN(component_length(comp1), component_length(comp2));
cmp = memcmp(data(comp1), data(comp2), common);
// not equal, lowest value has precedence
// equal, longest string has precedence
}


Here, what does *data* refrer to  ?

Is it the binary form of 1) [op, value]> / [op, bitmask]  or 2) Just
[value] / [bitmask]

eg:


1)  01 *18 58 58 58* 04 *01 46 81 50  ----> Dst.Prefix: 88.88.88.0/24
<http://88.88.88.0/24>  Port: 70 | 80*

2)  01* 18 58 58 58 *04* 03 5a c5 6e    ---->   Dst.Prefix: 88.88.88.0/24
<http://88.88.88.0/24>  Port: >=90 & <= 110*

*In the above FS rules,  Dst. Prefix is same in both, so we need to compare
the data of next type 4 (Port). *
*So do we need to do memcmp of  (01 46 81 50) and  (03 5a c5 6e) ?*

Thanks,
Pavana*.*

--001a1148dec0fbfb51056501d3b3
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Hello,<div>=C2=A0 In the RFC 5575, the following is given =
for the comparing the Flowspec components of types other then prefix.</div>=
<div><font face=3D"comic sans ms, sans-serif"><br></font></div><div><font f=
ace=3D"comic sans ms, sans-serif">} else {</font></div><div><font face=3D"c=
omic sans ms, sans-serif">common =3D</font></div><div><font face=3D"comic s=
ans ms, sans-serif">MIN(component_length(comp1), component_length(comp2));<=
/font></div><div><font face=3D"comic sans ms, sans-serif">cmp =3D memcmp(da=
ta(comp1), data(comp2), common);</font></div><div><font face=3D"comic sans =
ms, sans-serif">// not equal, lowest value has precedence</font></div><div>=
<font face=3D"comic sans ms, sans-serif">// equal, longest string has prece=
dence</font></div><div><font face=3D"comic sans ms, sans-serif">}=C2=A0</fo=
nt></div><div><br></div><div><br></div><div>Here, what does <b>data</b> ref=
rer to=C2=A0 ?</div><div><br></div><div>Is it the binary form of 1) [op, va=
lue]&gt; / [op, bitmask]=C2=A0 or 2) Just [value] / [bitmask]</div><div><br=
></div><div>eg:<br></div><div><br></div><div><br></div><div>1)=C2=A0 01 <b>=
18 58 58 58</b> 04 <b>01 46 81 50=C2=A0 ----&gt; Dst.Prefix: <a href=3D"htt=
p://88.88.88.0/24">88.88.88.0/24</a>=C2=A0 Port: 70 | 80</b></div><div><b>=
=C2=A0</b></div><div>2)=C2=A0 01<b> 18 58 58 58 </b>04<b> 03 5a c5 6e=C2=A0=
 =C2=A0 ----&gt;=C2=A0=C2=A0

<b style=3D"color:rgb(34,34,34);font-family:arial,sans-serif;font-size:smal=
l;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;=
letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;=
white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-=
decoration-style:initial;text-decoration-color:initial">Dst.Prefix: <a href=
=3D"http://88.88.88.0/24">88.88.88.0/24</a>=C2=A0 Port:</b>=C2=A0&gt;=3D90 =
&amp; &lt;=3D 110</b><br></div><div><b><br></b></div><div><b>In the above F=
S rules,=C2=A0 Dst. Prefix is same in both, so we need to compare the data =
of next type 4 (Port).=C2=A0</b></div><div><b>So do we need to do memcmp of=
=C2=A0=C2=A0(<b style=3D"color:rgb(34,34,34);font-family:arial,sans-serif;f=
ont-size:small;font-style:normal;font-variant-ligatures:normal;font-variant=
-caps:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-tr=
ansform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,2=
55,255);text-decoration-style:initial;text-decoration-color:initial">01 46 =
81 50) and=C2=A0=C2=A0(<b style=3D"color:rgb(34,34,34);font-family:arial,sa=
ns-serif;font-size:small;font-style:normal;font-variant-ligatures:normal;fo=
nt-variant-caps:normal;letter-spacing:normal;text-align:start;text-indent:0=
px;text-transform:none;white-space:normal;word-spacing:0px;background-color=
:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initi=
al">03 5a c5 6e) ?</b></b></b></div><div><b><b style=3D"color:rgb(34,34,34)=
;font-family:arial,sans-serif;font-size:small;font-style:normal;font-varian=
t-ligatures:normal;font-variant-caps:normal;letter-spacing:normal;text-alig=
n:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing=
:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-d=
ecoration-color:initial"><b style=3D"color:rgb(34,34,34);font-family:arial,=
sans-serif;font-size:small;font-style:normal;font-variant-ligatures:normal;=
font-variant-caps:normal;letter-spacing:normal;text-align:start;text-indent=
:0px;text-transform:none;white-space:normal;word-spacing:0px;background-col=
or:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:ini=
tial"><br></b></b></b></div><div><span style=3D"color:rgb(34,34,34);font-fa=
mily:arial,sans-serif;font-size:small;font-style:normal;font-variant-ligatu=
res:normal;font-variant-caps:normal;letter-spacing:normal;text-align:start;=
text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;bac=
kground-color:rgb(255,255,255);text-decoration-style:initial;text-decoratio=
n-color:initial"><span style=3D"color:rgb(34,34,34);font-family:arial,sans-=
serif;font-size:small;font-style:normal;font-variant-ligatures:normal;font-=
variant-caps:normal;letter-spacing:normal;text-align:start;text-indent:0px;=
text-transform:none;white-space:normal;word-spacing:0px;background-color:rg=
b(255,255,255);text-decoration-style:initial;text-decoration-color:initial"=
>Thanks,</span></span></div><div><span style=3D"font-weight:bold;color:rgb(=
34,34,34);font-family:arial,sans-serif;font-size:small;font-style:normal;fo=
nt-variant-ligatures:normal;font-variant-caps:normal;letter-spacing:normal;=
text-align:start;text-indent:0px;text-transform:none;white-space:normal;wor=
d-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initi=
al;text-decoration-color:initial"><span style=3D"color:rgb(34,34,34);font-f=
amily:arial,sans-serif;font-size:small;font-style:normal;font-variant-ligat=
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--001a1148dec0fbfb51056501d3b3--


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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Inter-Domain Routing WG of the IETF.

        Title           : Segment Routing Prefix SID extensions for BGP
        Authors         : Stefano Previdi
                          Clarence Filsfils
                          Acee Lindem
                          Arjun Sreekantiah
                          Hannes Gredler
	Filename        : draft-ietf-idr-bgp-prefix-sid-15.txt
	Pages           : 19
	Date            : 2018-02-12

Abstract:
   The Segment Routing (SR) architecture allows a node to steer a packet
   flow through any topological path and service chain by leveraging
   source routing.  The ingress node prepends an SR header to a packet
   containing a set of segment identifiers (SID).  Each SID represents a
   topological or a service-based instruction.  Per-flow state is
   maintained only on the ingress node of the SR domain.

   This document defines an optional, transitive BGP attribute for
   announcing BGP Prefix Segment Identifiers (BGP Prefix-SID)
   information.



The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-idr-bgp-prefix-sid/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-idr-bgp-prefix-sid-15
https://datatracker.ietf.org/doc/html/draft-ietf-idr-bgp-prefix-sid-15

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-idr-bgp-prefix-sid-15


Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/


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From: "Dongjie (Jimmy)" <jie.dong@huawei.com>
To: Jeffrey Haas <jhaas@pfrc.org>, "opsawg@ietf.org" <opsawg@ietf.org>
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Hi Jeff,=20

Thanks a lot for your comments and recommendation, which will be reflected =
in next revision of this document.=20

Best regards,
Jie

> -----Original Message-----
> From: Jeffrey Haas [mailto:jhaas@pfrc.org]
> Sent: Sunday, February 11, 2018 11:51 PM
> To: Dongjie (Jimmy) <jie.dong@huawei.com>; opsawg@ietf.org
> Cc: idr@ietf.org; idr-chairs@ietf.org
> Subject: Re: [Idr] FW: WG LC for draft-ietf-opsawg-ipfix-bgp-community
>=20
> Authors,
>=20
> Thanks for accommodating my prior comments on this draft.
>=20
> I have one final issue to raise with the draft.  The information elements=
 for
> extended community and large community by nature of their size are of typ=
e
> octetArray.  The draft correctly notes the expected size of each of these
> elements; 8 and 12 respectively.
>=20
> The draft provides no guidance for when each of these elements is NOT of =
the
> expected size.
>=20
> My recommendation is a small paragraph to the Operational Considerations
> section:
> "In the event that the bgpExtendedCommunity or bgpLargeCommunity
> Elements are not of their expected sizes (8 and 12 octets, respectively),=
 the
> receiver SHOULD ignore them."
>=20
> I'm not savvy with the general language wrapped around receiver procedure
> for IPFIX these days, so a bit of additional verbiage might be expected f=
or
> appropriate draft boilerplate.  However, this is intended to protect
> implementations using BGP logic from calling their parsing routines with =
invalid
> lengths.
>=20
> -- Jeff
>=20
> On Mon, Jan 22, 2018 at 08:26:52AM +0000, Dongjie (Jimmy) wrote:
> > Hi,
> >
> > Currently this BGP related draft is in WG LC in OPSAWG, their chairs su=
ggest
> IDR to take a look at it, please send comments (if any) to OPSAWG mailing=
 list.
> >
> > Best regards,
> > Jie
> >
> > -----Original Message-----
> > From: Tianran Zhou
> > Sent: Thursday, January 18, 2018 11:31 AM
> > To: 'idr-chairs@ietf.org'
> > Cc: 'opsawg-chairs@ietf.org'
> > Subject: FW: WG LC for draft-ietf-opsawg-ipfix-bgp-community
> >
> > Dear IDR Chairs,
> >
> > The OPSAWG started a 2 week WG LC for the following draft:
> > https://tools.ietf.org/html/draft-ietf-opsawg-ipfix-bgp-community-04
> >
> > We got many comments and suggestions from IDR when this work is adopted=
.
> Now the authors believe the document is ready.
> > We really appreciate more comments from this working group.
> >
> > Could you please help to forward this information to the IDR mailing li=
st?
> >
> > Thanks,
> > Tianran, as OPSAWG co-chair
> >
> >
> > -----Original Message-----
> > From: OPSAWG [mailto:opsawg-bounces@ietf.org] On Behalf Of Tianran
> > Zhou
> > Sent: Thursday, January 18, 2018 11:07 AM
> > To: opsawg@ietf.org
> > Cc: opsawg-chairs@ietf.org
> > Subject: [OPSAWG] WG LC for draft-ietf-opsawg-ipfix-bgp-community
> >
> > Hi WG,
> >
> > The authors of draft-ietf-opsawg-ipfix-bgp-community have posted the la=
test
> drafts to the mailing list, and believe that the document is ready for LC=
.
> >
> > This starts a 2 week WG LC on
> > https://tools.ietf.org/html/draft-ietf-opsawg-ipfix-bgp-community-04
> >
> > Please read the above draft and send any issues, comments, or correctio=
ns to
> this mailing list.
> > All supports and concerns are welcome and helpful for the authors.
> >
> > We are also looking for a document shepherd, best with operator backgro=
und,
> to help the following procedures.
> >
> > The WG LC will close on Feb 1, 2018.
> > Authors please indicate whether you are aware of any IPR for the draft.
> >
> > Thanks,
> > Tianran, as OPSAWG co-chair
> >
> > _______________________________________________
> > OPSAWG mailing list
> > OPSAWG@ietf.org
> > https://www.ietf.org/mailman/listinfo/opsawg
> >
> > _______________________________________________
> > Idr mailing list
> > Idr@ietf.org
> > https://www.ietf.org/mailman/listinfo/idr


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From: "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>
To: Susan Hares <shares@ndzh.com>, "idr@ietf.org" <idr@ietf.org>
CC: "idr-chairs@ietf.org" <idr-chairs@ietf.org>, Alvaro Retana <aretana.ietf@gmail.com>
Thread-Topic: [Idr] Early Code Point allocation for draft-ietf-idr-eag-distribution-05 (12/8 to 12/22)
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Date: Wed, 14 Feb 2018 02:40:01 +0000
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Subject: Re: [Idr] Early Code Point allocation for draft-ietf-idr-eag-distribution-05 (12/8 to 12/22)
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Sue -

Has early allocation been completed?
I don't see any code point assigned in the BGP-LS registry (apologies if I =
missed it).

Thanx.

    Les


From: Idr [mailto:idr-bounces@ietf.org] On Behalf Of Susan Hares
Sent: Friday, January 19, 2018 7:45 PM
To: idr@ietf.org
Cc: idr-chairs@ietf.org
Subject: Re: [Idr] Early Code Point allocation for draft-ietf-idr-eag-distr=
ibution-05 (12/8 to 12/22)

WG:

We've received 7 positive comments for early allocation of the draft-ietf-i=
dr-eag-distribution-05.txt work.  There were no problems pointed to with th=
e draft-ietf-idr-eag-distribution-05.txt specification.   The WG chairs usu=
ally like a few more positive comments, but the December time period (12/8 =
to 12/22) may have reduced the number of comments.  We received no substant=
ial number of comments after the first week.

Cisco has completed an implementation and is looking for an interoperabilit=
y test prior to shipping code. The work has implementations that need the e=
arly allocation, a stable specification, and these positive comments on the=
 list.  I've received several comments requesting the processing of this ca=
ll.  Based on the WG continued request to get implementations early allocat=
ion of code points, I'm going to declare WG consensus on allocating these c=
ode points.  I will forward this early allocation request to Alvaro Retana =
for processing.

I think this points to the fact that we should go to single week early allo=
cation request.   The drafts either succeed or fail on the first week's wor=
k.


Sue Hares
WG Co-chair

PS - I think this points to the fact that we should go to single week early=
 allocation request.   The drafts either succeed or fail on the first week'=
s work.   John and I are always looking for feedback to determine if we are=
 following the wishes of the IDR WG in getting this early allocations.



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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Sue &#8211;<o:p></o:p>=
</span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Has early allocation b=
een completed?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">I don&#8217;t see any =
code point assigned in the BGP-LS registry (apologies if I missed it).<o:p>=
</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Thanx.<o:p></o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">&nbsp;&nbsp;&nbsp; Les=
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
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4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b>From:</b> Idr [mailto:idr-bounces@ietf.org] <b>On=
 Behalf Of
</b>Susan Hares<br>
<b>Sent:</b> Friday, January 19, 2018 7:45 PM<br>
<b>To:</b> idr@ietf.org<br>
<b>Cc:</b> idr-chairs@ietf.org<br>
<b>Subject:</b> Re: [Idr] Early Code Point allocation for draft-ietf-idr-ea=
g-distribution-05 (12/8 to 12/22)<o:p></o:p></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">WG: <o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">We&#8217;ve received 7 positive comments for early a=
llocation of the draft-ietf-idr-eag-distribution-05.txt work.&nbsp; There w=
ere no problems pointed to with the draft-ietf-idr-eag-distribution-05.txt =
specification. &nbsp;&nbsp;The WG chairs usually like a
 few more positive comments, but the December time period (12/8 to 12/22) m=
ay have reduced the number of comments. &nbsp;We received no substantial nu=
mber of comments after the first week.
<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Cisco has completed an implementation and is looking=
 for an interoperability test prior to shipping code. The work has implemen=
tations that need the early allocation, a stable specification, and these p=
ositive comments on the list. &nbsp;I&#8217;ve
 received several comments requesting the processing of this call.&nbsp; Ba=
sed on the WG continued request to get implementations early allocation of =
code points, I&#8217;m going to declare WG consensus on allocating these co=
de points. &nbsp;I will forward this early allocation
 request to Alvaro Retana for processing. <o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">I think this points to the fact that we should go to=
 single week early allocation request. &nbsp;&nbsp;The drafts either succee=
d or fail on the first week&#8217;s work.
<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Sue Hares<o:p></o:p></p>
<p class=3D"MsoNormal">WG Co-chair <o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">PS - I think this points to the fact that we should =
go to single week early allocation request. &nbsp;&nbsp;The drafts either s=
ucceed or fail on the first week&#8217;s work.&nbsp;&nbsp; John and I are a=
lways looking for feedback to determine if we are following
 the wishes of the IDR WG in getting this early allocations.&nbsp; &nbsp;&n=
bsp;<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><b><span style=3D"font-size:24.0pt;font-family:&quot;Times New Rom=
an&quot;,serif;color:black"><o:p>&nbsp;</o:p></span></b></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
</div>
</body>
</html>

--_000_1d73e50ba66841de9c07e47a531a3745XCHALN001ciscocom_--


From nobody Tue Feb 13 18:51:39 2018
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Subject: [Idr] I-D Action: draft-ietf-idr-te-pm-bgp-09.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Inter-Domain Routing WG of the IETF.

        Title           : BGP-LS Advertisement of IGP Traffic Engineering Performance Metric Extensions
        Authors         : Les Ginsberg
                          Stefano Previdi
                          Qin Wu
                          Hannes Gredler
                          Saikat Ray
                          Jeff Tantsura
                          Clarence Filsfils
	Filename        : draft-ietf-idr-te-pm-bgp-09.txt
	Pages           : 9
	Date            : 2018-02-13

Abstract:
   This document defines new BGP-LS TLVs in order to carry the IGP
   Traffic Engineering Extensions defined in IS-IS and OSPF protocols.



The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-idr-te-pm-bgp/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-idr-te-pm-bgp-09
https://datatracker.ietf.org/doc/html/draft-ietf-idr-te-pm-bgp-09

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-idr-te-pm-bgp-09


Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/


From nobody Tue Feb 13 18:53:39 2018
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From: "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>
To: "idr@ietf.org" <idr@ietf.org>
Thread-Topic: [Idr] I-D Action: draft-ietf-idr-te-pm-bgp-09.txt
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Subject: Re: [Idr] I-D Action: draft-ietf-idr-te-pm-bgp-09.txt
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Just a refresh - and reflecting more completely the early allocation assign=
ed codepoints.

   Les


> -----Original Message-----
> From: Idr [mailto:idr-bounces@ietf.org] On Behalf Of internet-
> drafts@ietf.org
> Sent: Tuesday, February 13, 2018 6:52 PM
> To: i-d-announce@ietf.org
> Cc: idr@ietf.org
> Subject: [Idr] I-D Action: draft-ietf-idr-te-pm-bgp-09.txt
>=20
>=20
> A New Internet-Draft is available from the on-line Internet-Drafts direct=
ories.
> This draft is a work item of the Inter-Domain Routing WG of the IETF.
>=20
>         Title           : BGP-LS Advertisement of IGP Traffic Engineering=
 Performance
> Metric Extensions
>         Authors         : Les Ginsberg
>                           Stefano Previdi
>                           Qin Wu
>                           Hannes Gredler
>                           Saikat Ray
>                           Jeff Tantsura
>                           Clarence Filsfils
> 	Filename        : draft-ietf-idr-te-pm-bgp-09.txt
> 	Pages           : 9
> 	Date            : 2018-02-13
>=20
> Abstract:
>    This document defines new BGP-LS TLVs in order to carry the IGP
>    Traffic Engineering Extensions defined in IS-IS and OSPF protocols.
>=20
>=20
>=20
> The IETF datatracker status page for this draft is:
> https://datatracker.ietf.org/doc/draft-ietf-idr-te-pm-bgp/
>=20
> There are also htmlized versions available at:
> https://tools.ietf.org/html/draft-ietf-idr-te-pm-bgp-09
> https://datatracker.ietf.org/doc/html/draft-ietf-idr-te-pm-bgp-09
>=20
> A diff from the previous version is available at:
> https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-idr-te-pm-bgp-09
>=20
>=20
> Please note that it may take a couple of minutes from the time of submiss=
ion
> until the htmlized version and diff are available at tools.ietf.org.
>=20
> Internet-Drafts are also available by anonymous FTP at:
> ftp://ftp.ietf.org/internet-drafts/
>=20
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr


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Subject: [Idr] I-D Action: draft-ietf-idr-bgp-prefix-sid-16.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Inter-Domain Routing WG of the IETF.

        Title           : Segment Routing Prefix SID extensions for BGP
        Authors         : Stefano Previdi
                          Clarence Filsfils
                          Acee Lindem
                          Arjun Sreekantiah
                          Hannes Gredler
	Filename        : draft-ietf-idr-bgp-prefix-sid-16.txt
	Pages           : 19
	Date            : 2018-02-13

Abstract:
   The Segment Routing (SR) architecture allows a node to steer a packet
   flow through any topological path and service chain by leveraging
   source routing.  The ingress node prepends an SR header to a packet
   containing a set of segment identifiers (SID).  Each SID represents a
   topological or a service-based instruction.  Per-flow state is
   maintained only on the ingress node of the SR domain.

   This document defines an optional, transitive BGP attribute for
   announcing BGP Prefix Segment Identifiers (BGP Prefix-SID)
   information.



The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-idr-bgp-prefix-sid/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-idr-bgp-prefix-sid-16
https://datatracker.ietf.org/doc/html/draft-ietf-idr-bgp-prefix-sid-16

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-idr-bgp-prefix-sid-16


Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/


From nobody Wed Feb 14 13:41:11 2018
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Subject: Re: [Idr] BGP Flowspec rules precedence order (RFC 5575)
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Hi Pavana,

Did you have a look into the actual code (thanks to Job=E2=80=99s =
comment) that is contained in the RFC5575bis draft which should be =
identical from the behaviour:

https://tools.ietf.org/html/draft-ietf-idr-rfc5575bis-06 =
<https://tools.ietf.org/html/draft-ietf-idr-rfc5575bis-06>

Christoph

--
Christoph Loibl
c@tix.at | CL8-RIPE | PGP-Key-ID: 0x4B2C0055 | http://www.nextlayer.at



> On 12.02.2018, at 12:03, PVLR Pavana Murthy <pvlrpm@gmail.com> wrote:
>=20
> Hello,
>   In the RFC 5575, the following is given for the comparing the =
Flowspec components of types other then prefix.
>=20
> } else {
> common =3D
> MIN(component_length(comp1), component_length(comp2));
> cmp =3D memcmp(data(comp1), data(comp2), common);
> // not equal, lowest value has precedence
> // equal, longest string has precedence
> }
>=20
>=20
> Here, what does data refrer to  ?
>=20
> Is it the binary form of 1) [op, value]> / [op, bitmask]  or 2) Just =
[value] / [bitmask]
>=20
> eg:
>=20
>=20
> 1)  01 18 58 58 58 04 01 46 81 50  ----> Dst.Prefix: 88.88.88.0/24 =
<http://88.88.88.0/24>  Port: 70 | 80
>=20
> 2)  01 18 58 58 58 04 03 5a c5 6e    ---->   Dst.Prefix: 88.88.88.0/24 =
<http://88.88.88.0/24>  Port: >=3D90 & <=3D 110
>=20
> In the above FS rules,  Dst. Prefix is same in both, so we need to =
compare the data of next type 4 (Port).
> So do we need to do memcmp of  (01 46 81 50) and  (03 5a c5 6e) ?
>=20
> Thanks,
> Pavana.
>=20
>=20
>=20
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr


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	charset=utf-8

<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html; =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; line-break: after-white-space;" class=3D"">Hi =
Pavana,<div class=3D""><br class=3D""></div><div class=3D"">Did you have =
a look into the actual code (thanks to Job=E2=80=99s comment) that is =
contained in the RFC5575bis draft which should be identical from the =
behaviour:</div><div class=3D""><br class=3D""></div><div class=3D""><a =
href=3D"https://tools.ietf.org/html/draft-ietf-idr-rfc5575bis-06" =
class=3D"">https://tools.ietf.org/html/draft-ietf-idr-rfc5575bis-06</a></d=
iv><div class=3D""><br class=3D""></div><div =
class=3D"">Christoph</div><div class=3D""><br class=3D""><div class=3D"">
<div style=3D"color: rgb(0, 0, 0); font-family: Helvetica; font-size: =
12px; font-style: normal; font-variant-caps: normal; font-weight: =
normal; letter-spacing: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-size-adjust: auto; =
-webkit-text-stroke-width: 0px;">--&nbsp;<br class=3D"">Christoph =
Loibl<br class=3D""><a href=3D"mailto:c@tix.at" =
class=3D"">c@tix.at</a>&nbsp;| CL8-RIPE | PGP-Key-ID:&nbsp;0x4B2C0055 =
|&nbsp;<a href=3D"http://www.nextlayer.at" =
class=3D"">http://www.nextlayer.at</a></div><div style=3D"color: rgb(0, =
0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: normal; letter-spacing: normal; =
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><br =
class=3D""></div><br class=3D"Apple-interchange-newline">
</div>
<div><br class=3D""><blockquote type=3D"cite" class=3D""><div =
class=3D"">On 12.02.2018, at 12:03, PVLR Pavana Murthy &lt;<a =
href=3D"mailto:pvlrpm@gmail.com" class=3D"">pvlrpm@gmail.com</a>&gt; =
wrote:</div><br class=3D"Apple-interchange-newline"><div class=3D""><div =
dir=3D"ltr" class=3D"">Hello,<div class=3D"">&nbsp; In the RFC 5575, the =
following is given for the comparing the Flowspec components of types =
other then prefix.</div><div class=3D""><font face=3D"comic sans ms, =
sans-serif" class=3D""><br class=3D""></font></div><div class=3D""><font =
face=3D"comic sans ms, sans-serif" class=3D"">} else {</font></div><div =
class=3D""><font face=3D"comic sans ms, sans-serif" class=3D"">common =
=3D</font></div><div class=3D""><font face=3D"comic sans ms, sans-serif" =
class=3D"">MIN(component_length(comp1), =
component_length(comp2));</font></div><div class=3D""><font face=3D"comic =
sans ms, sans-serif" class=3D"">cmp =3D memcmp(data(comp1), data(comp2), =
common);</font></div><div class=3D""><font face=3D"comic sans ms, =
sans-serif" class=3D"">// not equal, lowest value has =
precedence</font></div><div class=3D""><font face=3D"comic sans ms, =
sans-serif" class=3D"">// equal, longest string has =
precedence</font></div><div class=3D""><font face=3D"comic sans ms, =
sans-serif" class=3D"">}&nbsp;</font></div><div class=3D""><br =
class=3D""></div><div class=3D""><br class=3D""></div><div =
class=3D"">Here, what does <b class=3D"">data</b> refrer to&nbsp; =
?</div><div class=3D""><br class=3D""></div><div class=3D"">Is it the =
binary form of 1) [op, value]&gt; / [op, bitmask]&nbsp; or 2) Just =
[value] / [bitmask]</div><div class=3D""><br class=3D""></div><div =
class=3D"">eg:<br class=3D""></div><div class=3D""><br =
class=3D""></div><div class=3D""><br class=3D""></div><div =
class=3D"">1)&nbsp; 01 <b class=3D"">18 58 58 58</b> 04 <b class=3D"">01 =
46 81 50&nbsp; ----&gt; Dst.Prefix: <a href=3D"http://88.88.88.0/24" =
class=3D"">88.88.88.0/24</a>&nbsp; Port: 70 | 80</b></div><div =
class=3D""><b class=3D"">&nbsp;</b></div><div class=3D"">2)&nbsp; 01<b =
class=3D""> 18 58 58 58 </b>04<b class=3D""> 03 5a c5 6e&nbsp; &nbsp; =
----&gt;&nbsp;&nbsp;

<b =
style=3D"color:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;=
font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;l=
etter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;=
white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text=
-decoration-style:initial;text-decoration-color:initial" =
class=3D"">Dst.Prefix: <a href=3D"http://88.88.88.0/24" =
class=3D"">88.88.88.0/24</a>&nbsp; Port:</b>&nbsp;&gt;=3D90 &amp; &lt;=3D =
110</b><br class=3D""></div><div class=3D""><b class=3D""><br =
class=3D""></b></div><div class=3D""><b class=3D"">In the above FS =
rules,&nbsp; Dst. Prefix is same in both, so we need to compare the data =
of next type 4 (Port).&nbsp;</b></div><div class=3D""><b class=3D"">So =
do we need to do memcmp of&nbsp;&nbsp;(<b =
style=3D"color:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;=
font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;l=
etter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;=
white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text=
-decoration-style:initial;text-decoration-color:initial" class=3D"">01 =
46 81 50) and&nbsp;&nbsp;(<b =
style=3D"color:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;=
font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;l=
etter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;=
white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text=
-decoration-style:initial;text-decoration-color:initial" class=3D"">03 =
5a c5 6e) ?</b></b></b></div><div class=3D""><b class=3D""><b =
style=3D"color:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;=
font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;l=
etter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;=
white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text=
-decoration-style:initial;text-decoration-color:initial" class=3D""><b =
style=3D"color:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;=
font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;l=
etter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;=
white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text=
-decoration-style:initial;text-decoration-color:initial" class=3D""><br =
class=3D""></b></b></b></div><div class=3D""><span =
style=3D"color:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;=
font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;l=
etter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;=
white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text=
-decoration-style:initial;text-decoration-color:initial" class=3D""><span =
style=3D"color:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;=
font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;l=
etter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;=
white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text=
-decoration-style:initial;text-decoration-color:initial" =
class=3D"">Thanks,</span></span></div><div class=3D""><span =
style=3D"font-weight:bold;color:rgb(34,34,34);font-family:arial,sans-serif=
;font-size:small;font-style:normal;font-variant-ligatures:normal;font-vari=
ant-caps:normal;letter-spacing:normal;text-align:start;text-indent:0px;tex=
t-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(=
255,255,255);text-decoration-style:initial;text-decoration-color:initial" =
class=3D""><span =
style=3D"color:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;=
font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;l=
etter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;=
white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text=
-decoration-style:initial;text-decoration-color:initial;font-weight:normal=
" class=3D"">Pavana</span><b =
style=3D"font-weight:bold;color:rgb(34,34,34);font-family:arial,sans-serif=
;font-size:small;font-style:normal;font-variant-ligatures:normal;font-vari=
ant-caps:normal;letter-spacing:normal;text-align:start;text-indent:0px;tex=
t-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(=
255,255,255);text-decoration-style:initial;text-decoration-color:initial" =
class=3D"">.</b></span></div><div class=3D""><b class=3D""><br =
class=3D""></b></div><div class=3D""><b class=3D""><br =
class=3D""></b></div><div class=3D""><b class=3D""><br =
class=3D""></b></div></div>
_______________________________________________<br class=3D"">Idr =
mailing list<br class=3D""><a href=3D"mailto:Idr@ietf.org" =
class=3D"">Idr@ietf.org</a><br =
class=3D"">https://www.ietf.org/mailman/listinfo/idr<br =
class=3D""></div></blockquote></div><br class=3D""></div></body></html>=

--Apple-Mail=_F3EA6348-EEEF-4EF1-A91C-B5D947CC6119--

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Content-Description: Message signed with OpenPGP

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--Apple-Mail=_671D4A96-1B66-4DF6-A92A-EBF83F3AF0CB--


From nobody Wed Feb 14 14:39:35 2018
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Inter-Domain Routing WG of the IETF.

        Title           : Making Route Servers Aware of Data Link Failures at IXPs
        Authors         : Randy Bush
                          Jeffrey Haas
                          John G. Scudder
                          Arnold Nipper
                          Christoph Dietzel
	Filename        : draft-ietf-idr-rs-bfd-04.txt
	Pages           : 13
	Date            : 2018-02-14

Abstract:
   When BGP route servers are used, the data plane is not congruent with
   the control plane.  Therefore, peers at an Internet exchange can lose
   data connectivity without the control plane being aware of it, and
   packets are lost.  This document proposes the use of a newly defined
   BGP Subsequent Address Family Identifier (SAFI) both to allow the
   route server to request its clients use BFD to track data plane
   connectivity to their peers' addresses, and for the clients to signal
   that connectivity state back to the route server.



The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-idr-rs-bfd/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-idr-rs-bfd-04
https://datatracker.ietf.org/doc/html/draft-ietf-idr-rs-bfd-04

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-idr-rs-bfd-04


Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/


From nobody Wed Feb 14 14:41:22 2018
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Subject: [Idr] [internet-drafts@ietf.org: I-D Action: draft-ietf-idr-rs-bfd-04.txt]
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This refreshes the expired version.  It includes two minor changes:
1. Christoph Dietzel is taking over from Thomas King as a coauthors.
2. A section has been added commenting on alternative uses of BFD extensions
for the continuity check.

-- Jeff

----- Forwarded message from internet-drafts@ietf.org -----

Date: Wed, 14 Feb 2018 14:39:27 -0800
From: internet-drafts@ietf.org
To: i-d-announce@ietf.org
Cc: idr@ietf.org
Subject: [Idr] I-D Action: draft-ietf-idr-rs-bfd-04.txt


A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Inter-Domain Routing WG of the IETF.

        Title           : Making Route Servers Aware of Data Link Failures at IXPs
        Authors         : Randy Bush
                          Jeffrey Haas
                          John G. Scudder
                          Arnold Nipper
                          Christoph Dietzel
	Filename        : draft-ietf-idr-rs-bfd-04.txt
	Pages           : 13
	Date            : 2018-02-14

Abstract:
   When BGP route servers are used, the data plane is not congruent with
   the control plane.  Therefore, peers at an Internet exchange can lose
   data connectivity without the control plane being aware of it, and
   packets are lost.  This document proposes the use of a newly defined
   BGP Subsequent Address Family Identifier (SAFI) both to allow the
   route server to request its clients use BFD to track data plane
   connectivity to their peers' addresses, and for the clients to signal
   that connectivity state back to the route server.



The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-idr-rs-bfd/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-idr-rs-bfd-04
https://datatracker.ietf.org/doc/html/draft-ietf-idr-rs-bfd-04

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-idr-rs-bfd-04


Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/

_______________________________________________
Idr mailing list
Idr@ietf.org
https://www.ietf.org/mailman/listinfo/idr

----- End forwarded message -----


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Possible missed messages on this list

Dear list participants -

An upgrade to the IETF's custom mail processing software today resulted in
some delivery failures for *some* messages to *some* recipients on this
list, over the past 3 hours.

We invite you to check the mail archives for this list, at:

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Glen
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IT Director
AMS (IETF Secretariat)

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<div dir=3D"ltr">Possible missed messages on this list<br><br>Dear list par=
ticipants -<br><br>An upgrade to the IETF&#39;s custom mail processing soft=
ware today resulted in some delivery failures for *some* messages to *some*=
 recipients on this list, over the past 3 hours.<br><br>We invite you to ch=
eck the mail archives for this list, at:<br><br><a href=3D"https://mailarch=
ive.ietf.org/arch/search/?email_list=3Didr">https://mailarchive.ietf.org/ar=
ch/search/?email_list=3Didr</a><br><br>to ensure that you have received all=
 the relevant messages for this list today.<br><br>We apologize for the inc=
onvenience.<br><br>Glen<br>--<br>Glen Barney<br>IT Director<br>AMS (IETF Se=
cretariat)</div>

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From: PVLR Pavana Murthy <pvlrpm@gmail.com>
Date: Thu, 15 Feb 2018 09:38:14 +0530
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To: Christoph Loibl <c@tix.at>
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Subject: Re: [Idr] BGP Flowspec rules precedence order (RFC 5575)
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Hi Christoph,
  Even in the  RFC5575bis,  the following is given  for comparing
non-prefix type components.

 else:
               # assuming comp_a.value, comp_b.value of type bytearray
               if len(comp_a.value) =3D=3D len(comp_b.value):
                   if comp_a.value > comp_b.value:
                       return B_HAS_PRECEDENCE
                   if comp_a.value < comp_b.value:
                       return A_HAS_PRECEDENCE
                   # components equal -> continue with next component
               else:
                   common =3D min(len(comp_a.value), len(comp_b.value))
                   if comp_a.value[:common] > comp_b.value[:common]:
                       return B_HAS_PRECEDENCE
                   elif comp_a.value[:common] < comp_b.value[:common]:
                       return A_HAS_PRECEDENCE
                   # the first common bytes match
                   elif len(comp_a.value) > len(comp_b.value):
                       return A_HAS_PRECEDENCE
                   else:
                       return B_HAS_PRECEDENCE


*What is  comp_a.value here ? Is it the binary sting of [op,
value]/[op,bitmask] or only value/bitmask ?*


Thanks,

Pavana.


On Thu, Feb 15, 2018 at 3:11 AM, Christoph Loibl <c@tix.at> wrote:

> Hi Pavana,
>
> Did you have a look into the actual code (thanks to Job=E2=80=99s comment=
) that is
> contained in the RFC5575bis draft which should be identical from the
> behaviour:
>
> https://tools.ietf.org/html/draft-ietf-idr-rfc5575bis-06
>
> Christoph
>
> --
> Christoph Loibl
> c@tix.at | CL8-RIPE | PGP-Key-ID: 0x4B2C0055 | http://www.nextlayer.at
>
>
>
> On 12.02.2018, at 12:03, PVLR Pavana Murthy <pvlrpm@gmail.com> wrote:
>
> Hello,
>   In the RFC 5575, the following is given for the comparing the Flowspec
> components of types other then prefix.
>
> } else {
> common =3D
> MIN(component_length(comp1), component_length(comp2));
> cmp =3D memcmp(data(comp1), data(comp2), common);
> // not equal, lowest value has precedence
> // equal, longest string has precedence
> }
>
>
> Here, what does *data* refrer to  ?
>
> Is it the binary form of 1) [op, value]> / [op, bitmask]  or 2) Just
> [value] / [bitmask]
>
> eg:
>
>
> 1)  01 *18 58 58 58* 04 *01 46 81 50  ----> Dst.Prefix: 88.88.88.0/24
> <http://88.88.88.0/24>  Port: 70 | 80*
>
> 2)  01* 18 58 58 58 *04* 03 5a c5 6e    ---->   Dst.Prefix: 88.88.88.0/24
> <http://88.88.88.0/24>  Port: >=3D90 & <=3D 110*
>
> *In the above FS rules,  Dst. Prefix is same in both, so we need to
> compare the data of next type 4 (Port). *
> *So do we need to do memcmp of  (01 46 81 50) and  (03 5a c5 6e) ?*
>
> Thanks,
> Pavana*.*
>
>
>
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr
>
>
>

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<div dir=3D"ltr">Hi Christoph,<div>=C2=A0 Even in the=C2=A0

<span style=3D"color:rgb(34,34,34);font-family:arial,sans-serif;font-size:1=
2.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:nor=
mal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;=
text-transform:none;white-space:normal;word-spacing:0px;background-color:rg=
b(255,255,255);text-decoration-style:initial;text-decoration-color:initial;=
float:none;display:inline">RFC5575bis,=C2=A0</span>=C2=A0the following is g=
iven=C2=A0=C2=A0for comparing non-prefix type components.=C2=A0</div><div><=
br>

<pre class=3D"gmail-newpage" style=3D"font-size:13.3333px;margin-top:0px;ma=
rgin-bottom:0px;color:rgb(0,0,0);font-style:normal;font-variant-ligatures:n=
ormal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-a=
lign:start;text-indent:0px;text-transform:none;word-spacing:0px;text-decora=
tion-style:initial;text-decoration-color:initial"> else:
               # assuming comp_a.value, comp_b.value of type bytearray
               if len(comp_a.value) =3D=3D len(comp_b.value):
                   if comp_a.value &gt; comp_b.value:
                       return B_HAS_PRECEDENCE
                   if comp_a.value &lt; comp_b.value:
                       return A_HAS_PRECEDENCE
                   # components equal -&gt; continue with next component
               else:
                   common =3D min(len(comp_a.value), len(comp_b.value))
                   if comp_a.value[:common] &gt; comp_b.value[:common]:
                       return B_HAS_PRECEDENCE
                   elif comp_a.value[:common] &lt; comp_b.value[:common]:
                       return A_HAS_PRECEDENCE
                   # the first common bytes match
                   elif len(comp_a.value) &gt; len(comp_b.value):
                       return A_HAS_PRECEDENCE
                   else:
                       return B_HAS_PRECEDENCE</pre><pre class=3D"gmail-new=
page" style=3D"font-size:13.3333px;margin-top:0px;margin-bottom:0px;color:r=
gb(0,0,0);font-style:normal;font-variant-ligatures:normal;font-variant-caps=
:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:=
0px;text-transform:none;word-spacing:0px;text-decoration-style:initial;text=
-decoration-color:initial"><br></pre><pre class=3D"gmail-newpage" style=3D"=
font-size:13.3333px;margin-top:0px;margin-bottom:0px;color:rgb(0,0,0);font-=
style:normal;font-variant-ligatures:normal;font-variant-caps:normal;letter-=
spacing:normal;text-align:start;text-indent:0px;text-transform:none;word-sp=
acing:0px;text-decoration-style:initial;text-decoration-color:initial"><fon=
t face=3D"arial, helvetica, sans-serif" style=3D""><b>What is  comp_a.value=
 here ? Is it the binary sting of [op, value]/[op,bitmask] or only value/bi=
tmask ?</b></font></pre><pre class=3D"gmail-newpage" style=3D"font-size:13.=
3333px;margin-top:0px;margin-bottom:0px;color:rgb(0,0,0);font-style:normal;=
font-variant-ligatures:normal;font-variant-caps:normal;letter-spacing:norma=
l;text-align:start;text-indent:0px;text-transform:none;word-spacing:0px;tex=
t-decoration-style:initial;text-decoration-color:initial"><font face=3D"ari=
al, helvetica, sans-serif" style=3D""><b><br></b></font></pre><pre class=3D=
"gmail-newpage" style=3D"font-size:13.3333px;margin-top:0px;margin-bottom:0=
px;color:rgb(0,0,0);font-style:normal;font-variant-ligatures:normal;font-va=
riant-caps:normal;letter-spacing:normal;text-align:start;text-indent:0px;te=
xt-transform:none;word-spacing:0px;text-decoration-style:initial;text-decor=
ation-color:initial"><font face=3D"arial, helvetica, sans-serif" style=3D""=
>Thanks,</font></pre><pre class=3D"gmail-newpage" style=3D"font-size:13.333=
3px;margin-top:0px;margin-bottom:0px;color:rgb(0,0,0);font-style:normal;fon=
t-variant-ligatures:normal;font-variant-caps:normal;letter-spacing:normal;t=
ext-align:start;text-indent:0px;text-transform:none;word-spacing:0px;text-d=
ecoration-style:initial;text-decoration-color:initial"><font face=3D"arial,=
 helvetica, sans-serif" style=3D"">Pavana.</font></pre>

</div></div><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">On Th=
u, Feb 15, 2018 at 3:11 AM, Christoph Loibl <span dir=3D"ltr">&lt;<a href=
=3D"mailto:c@tix.at" target=3D"_blank">c@tix.at</a>&gt;</span> wrote:<br><b=
lockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px =
#ccc solid;padding-left:1ex"><div style=3D"word-wrap:break-word;line-break:=
after-white-space">Hi Pavana,<div><br></div><div>Did you have a look into t=
he actual code (thanks to Job=E2=80=99s comment) that is contained in the R=
FC5575bis draft which should be identical from the behaviour:</div><div><br=
></div><div><a href=3D"https://tools.ietf.org/html/draft-ietf-idr-rfc5575bi=
s-06" target=3D"_blank">https://tools.ietf.org/html/<wbr>draft-ietf-idr-rfc=
5575bis-06</a></div><div><br></div><div>Christoph</div><div><br><div>
<div style=3D"color:rgb(0,0,0);font-family:Helvetica;font-size:12px;font-st=
yle:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:norma=
l;text-align:start;text-indent:0px;text-transform:none;white-space:normal;w=
ord-spacing:0px">--=C2=A0<br>Christoph Loibl<br><a href=3D"mailto:c@tix.at"=
 target=3D"_blank">c@tix.at</a>=C2=A0| CL8-RIPE | PGP-Key-ID:=C2=A00x4B2C00=
55 |=C2=A0<a href=3D"http://www.nextlayer.at" target=3D"_blank">http://www.=
nextlayer.at</a></div><div style=3D"color:rgb(0,0,0);font-family:Helvetica;=
font-size:12px;font-style:normal;font-variant-caps:normal;font-weight:norma=
l;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:non=
e;white-space:normal;word-spacing:0px"><br></div><br class=3D"m_-4693473135=
615231940Apple-interchange-newline">
</div>
<div><br><blockquote type=3D"cite"><div><div class=3D"h5"><div>On 12.02.201=
8, at 12:03, PVLR Pavana Murthy &lt;<a href=3D"mailto:pvlrpm@gmail.com" tar=
get=3D"_blank">pvlrpm@gmail.com</a>&gt; wrote:</div><br class=3D"m_-4693473=
135615231940Apple-interchange-newline"></div></div><div><div><div class=3D"=
h5"><div dir=3D"ltr">Hello,<div>=C2=A0 In the RFC 5575, the following is gi=
ven for the comparing the Flowspec components of types other then prefix.</=
div><div><font face=3D"comic sans ms, sans-serif"><br></font></div><div><fo=
nt face=3D"comic sans ms, sans-serif">} else {</font></div><div><font face=
=3D"comic sans ms, sans-serif">common =3D</font></div><div><font face=3D"co=
mic sans ms, sans-serif">MIN(component_length(comp1), component_length(comp=
2));</font></div><div><font face=3D"comic sans ms, sans-serif">cmp =3D memc=
mp(data(comp1), data(comp2), common);</font></div><div><font face=3D"comic =
sans ms, sans-serif">// not equal, lowest value has precedence</font></div>=
<div><font face=3D"comic sans ms, sans-serif">// equal, longest string has =
precedence</font></div><div><font face=3D"comic sans ms, sans-serif">}=C2=
=A0</font></div><div><br></div><div><br></div><div>Here, what does <b>data<=
/b> refrer to=C2=A0 ?</div><div><br></div><div>Is it the binary form of 1) =
[op, value]&gt; / [op, bitmask]=C2=A0 or 2) Just [value] / [bitmask]</div><=
div><br></div><div>eg:<br></div><div><br></div><div><br></div><div>1)=C2=A0=
 01 <b>18 58 58 58</b> 04 <b>01 46 81 50=C2=A0 ----&gt; Dst.Prefix: <a href=
=3D"http://88.88.88.0/24" target=3D"_blank">88.88.88.0/24</a>=C2=A0 Port: 7=
0 | 80</b></div><div><b>=C2=A0</b></div><div>2)=C2=A0 01<b> 18 58 58 58 </b=
>04<b> 03 5a c5 6e=C2=A0 =C2=A0 ----&gt;=C2=A0=C2=A0

<b style=3D"color:rgb(34,34,34);font-family:arial,sans-serif;font-size:smal=
l;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;=
letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;=
white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-=
decoration-style:initial;text-decoration-color:initial">Dst.Prefix: <a href=
=3D"http://88.88.88.0/24" target=3D"_blank">88.88.88.0/24</a>=C2=A0 Port:</=
b>=C2=A0&gt;=3D90 &amp; &lt;=3D 110</b><br></div><div><b><br></b></div><div=
><b>In the above FS rules,=C2=A0 Dst. Prefix is same in both, so we need to=
 compare the data of next type 4 (Port).=C2=A0</b></div><div><b>So do we ne=
ed to do memcmp of=C2=A0=C2=A0(<b style=3D"color:rgb(34,34,34);font-family:=
arial,sans-serif;font-size:small;font-style:normal;font-variant-ligatures:n=
ormal;font-variant-caps:normal;letter-spacing:normal;text-align:start;text-=
indent:0px;text-transform:none;white-space:normal;word-spacing:0px;backgrou=
nd-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-col=
or:initial">01 46 81 50) and=C2=A0=C2=A0(<b style=3D"color:rgb(34,34,34);fo=
nt-family:arial,sans-serif;font-size:small;font-style:normal;font-variant-l=
igatures:normal;font-variant-caps:normal;letter-spacing:normal;text-align:s=
tart;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0p=
x;background-color:rgb(255,255,255);text-decoration-style:initial;text-deco=
ration-color:initial">03 5a c5 6e) ?</b></b></b></div><div><b><b style=3D"c=
olor:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;font-style:=
normal;font-variant-ligatures:normal;font-variant-caps:normal;letter-spacin=
g:normal;text-align:start;text-indent:0px;text-transform:none;white-space:n=
ormal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-st=
yle:initial;text-decoration-color:initial"><b style=3D"color:rgb(34,34,34);=
font-family:arial,sans-serif;font-size:small;font-style:normal;font-variant=
-ligatures:normal;font-variant-caps:normal;letter-spacing:normal;text-align=
:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:=
0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-de=
coration-color:initial"><br></b></b></b></div><div><span style=3D"color:rgb=
(34,34,34);font-family:arial,sans-serif;font-size:small;font-style:normal;f=
ont-variant-ligatures:normal;font-variant-caps:normal;letter-spacing:normal=
;text-align:start;text-indent:0px;text-transform:none;white-space:normal;wo=
rd-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:init=
ial;text-decoration-color:initial"><span style=3D"color:rgb(34,34,34);font-=
family:arial,sans-serif;font-size:small;font-style:normal;font-variant-liga=
tures:normal;font-variant-caps:normal;letter-spacing:normal;text-align:star=
t;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;b=
ackground-color:rgb(255,255,255);text-decoration-style:initial;text-decorat=
ion-color:initial">Thanks,</span></span></div><div><span style=3D"font-weig=
ht:bold;color:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;fo=
nt-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;lett=
er-spacing:normal;text-align:start;text-indent:0px;text-transform:none;whit=
e-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-deco=
ration-style:initial;text-decoration-color:initial"><span style=3D"color:rg=
b(34,34,34);font-family:arial,sans-serif;font-size:small;font-style:normal;=
font-variant-ligatures:normal;font-variant-caps:normal;letter-spacing:norma=
l;text-align:start;text-indent:0px;text-transform:none;white-space:normal;w=
ord-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:ini=
tial;text-decoration-color:initial;font-weight:normal">Pavana</span><b styl=
e=3D"font-weight:bold;color:rgb(34,34,34);font-family:arial,sans-serif;font=
-size:small;font-style:normal;font-variant-ligatures:normal;font-variant-ca=
ps:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-trans=
form:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,=
255);text-decoration-style:initial;text-decoration-color:initial">.</b></sp=
an></div><div><b><br></b></div><div><b><br></b></div><div><b><br></b></div>=
</div></div></div>
______________________________<wbr>_________________<br>Idr mailing list<br=
><a href=3D"mailto:Idr@ietf.org" target=3D"_blank">Idr@ietf.org</a><br><a h=
ref=3D"https://www.ietf.org/mailman/listinfo/idr" target=3D"_blank">https:/=
/www.ietf.org/mailman/<wbr>listinfo/idr</a><br></div></blockquote></div><br=
></div></div></blockquote></div><br></div>

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Subject: Re: [Idr] BGP Flowspec rules precedence order (RFC 5575)
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Hi Pavana,

You can rather easily test the behaviour when you feed your case into =
the python function:

def main():
    fs1 =3D FS_nlri(components=3D[
        FS_component(component_type=3DIP_DESTINATION, =
value=3Dipaddress.ip_network('88.88.88.0/24')),
        FS_component(component_type=3D4, value=3Dbytearray([0x01, 0x46, =
0x81, 0x50]))
    ])

    fs2 =3D FS_nlri(components=3D[
        FS_component(component_type=3DIP_DESTINATION, =
value=3Dipaddress.ip_network('88.88.88.0/24')),
        FS_component(component_type=3D4, value=3Dbytearray([0x03, 0x5a, =
0xc5, 0x6e]))
    ])
    print(flow_rule_cmp(fs1, fs2))

What happens is (I refer to line numbers of the code in the github repo
https://github.com/stoffi92/flowspec-cmp/blob/master/flow_cmp.py =
<https://github.com/stoffi92/flowspec-cmp/blob/master/flow_cmp.py> :

*) The IP components are compared and as you mentioned: no decision can =
be made since the ip components are equal. (we reach line 74 for the =
equal ip components and continue with the next iteration)

*) The second component _types_ are equal but not IP (we end up in the =
branch in line 80 since the components are type=3D4 and not 1 or 2)

*) The length of the second components is compared and equal, so we =
continue in line 82

** See below: this is basically where the compare that you asked for =
happens **

*) Now we come to the point where we compare the string of bytes one by =
one. As long as they are equal. (this is basically what memcmp does - =
this is not very explicit in the python code, since it is done by the <, =
> operators for the bytearray implicitly)

In your case what it does is, that it compares 0x01 to 0x03 and figures =
out that 0x01 is the lower value so it takes the branch in line 84 and =
returns with A_HAS_PRECEDENCE from line 85 (if both of your components =
would start with 0x01 it would continue to the second byte and so on).

Your first FS nlri has precedence because of the =E2=80=9Clower=E2=80=9D =
value.

>> 01 18 58 58 58 04 01 46 81 50  ----> Dst.Prefix: 88.88.88.0/24 =
<http://88.88.88.0/24>  Port: 70 | 80

Discamer: I assumed that you encoded the components themselfs correctly =
(the 01 46 81 50 and 03 5a c5 6e)

Does this answer your question?

Christoph

--
Christoph Loibl
c@tix.at | CL8-RIPE | PGP-Key-ID: 0x4B2C0055 | http://www.nextlayer.at



> On 15.02.2018, at 05:08, PVLR Pavana Murthy <pvlrpm@gmail.com> wrote:
>=20
> Hi Christoph,
>   Even in the  RFC5575bis,  the following is given  for comparing =
non-prefix type components.
>=20
>  else:
>                # assuming comp_a.value, comp_b.value of type bytearray
>                if len(comp_a.value) =3D=3D len(comp_b.value):
>                    if comp_a.value > comp_b.value:
>                        return B_HAS_PRECEDENCE
>                    if comp_a.value < comp_b.value:
>                        return A_HAS_PRECEDENCE
>                    # components equal -> continue with next component
>                else:
>                    common =3D min(len(comp_a.value), =
len(comp_b.value))
>                    if comp_a.value[:common] > comp_b.value[:common]:
>                        return B_HAS_PRECEDENCE
>                    elif comp_a.value[:common] < comp_b.value[:common]:
>                        return A_HAS_PRECEDENCE
>                    # the first common bytes match
>                    elif len(comp_a.value) > len(comp_b.value):
>                        return A_HAS_PRECEDENCE
>                    else:
>                        return B_HAS_PRECEDENCE
>=20
> What is  comp_a.value here ? Is it the binary sting of [op, =
value]/[op,bitmask] or only value/bitmask ?
>=20
> Thanks,
> Pavana.
>=20
> On Thu, Feb 15, 2018 at 3:11 AM, Christoph Loibl <c@tix.at =
<mailto:c@tix.at>> wrote:
> Hi Pavana,
>=20
> Did you have a look into the actual code (thanks to Job=E2=80=99s =
comment) that is contained in the RFC5575bis draft which should be =
identical from the behaviour:
>=20
> https://tools.ietf.org/html/draft-ietf-idr-rfc5575bis-06 =
<https://tools.ietf.org/html/draft-ietf-idr-rfc5575bis-06>
>=20
> Christoph
>=20
> --
> Christoph Loibl
> c@tix.at <mailto:c@tix.at> | CL8-RIPE | PGP-Key-ID: 0x4B2C0055 | =
http://www.nextlayer.at <http://www.nextlayer.at/>
>=20
>=20
>=20
>> On 12.02.2018, at 12:03, PVLR Pavana Murthy <pvlrpm@gmail.com =
<mailto:pvlrpm@gmail.com>> wrote:
>>=20
>> Hello,
>>   In the RFC 5575, the following is given for the comparing the =
Flowspec components of types other then prefix.
>>=20
>> } else {
>> common =3D
>> MIN(component_length(comp1), component_length(comp2));
>> cmp =3D memcmp(data(comp1), data(comp2), common);
>> // not equal, lowest value has precedence
>> // equal, longest string has precedence
>> }
>>=20
>>=20
>> Here, what does data refrer to  ?
>>=20
>> Is it the binary form of 1) [op, value]> / [op, bitmask]  or 2) Just =
[value] / [bitmask]
>>=20
>> eg:
>>=20
>>=20
>> 1)  01 18 58 58 58 04 01 46 81 50  ----> Dst.Prefix: 88.88.88.0/24 =
<http://88.88.88.0/24>  Port: 70 | 80
>>=20
>> 2)  01 18 58 58 58 04 03 5a c5 6e    ---->   Dst.Prefix: =
88.88.88.0/24 <http://88.88.88.0/24>  Port: >=3D90 & <=3D 110
>>=20
>> In the above FS rules,  Dst. Prefix is same in both, so we need to =
compare the data of next type 4 (Port).
>> So do we need to do memcmp of  (01 46 81 50) and  (03 5a c5 6e) ?
>>=20
>> Thanks,
>> Pavana.
>>=20
>>=20
>>=20
>> _______________________________________________
>> Idr mailing list
>> Idr@ietf.org <mailto:Idr@ietf.org>
>> https://www.ietf.org/mailman/listinfo/idr =
<https://www.ietf.org/mailman/listinfo/idr>
>=20
>=20


--Apple-Mail=_0BB89E2A-3D21-4567-81A5-7ED914325A8B
Content-Transfer-Encoding: quoted-printable
Content-Type: text/html;
	charset=utf-8

<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html; =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; line-break: after-white-space;" class=3D"">Hi =
Pavana,<div class=3D""><br class=3D""></div><div class=3D"">You can =
rather easily test the behaviour when you feed your case into the python =
function:</div><div class=3D""><br class=3D""></div><div class=3D""><div =
class=3D""><font face=3D"Courier" size=3D"1" class=3D"">def =
main():</font></div><div class=3D""><font face=3D"Courier" size=3D"1" =
class=3D"">&nbsp; &nbsp; fs1 =3D FS_nlri(components=3D[</font></div><div =
class=3D""><font face=3D"Courier" size=3D"1" class=3D"">&nbsp; &nbsp; =
&nbsp; &nbsp; FS_component(component_type=3DIP_DESTINATION, =
value=3Dipaddress.ip_network('88.88.88.0/24')),</font></div><div =
class=3D""><font face=3D"Courier" size=3D"1" class=3D"">&nbsp; &nbsp; =
&nbsp; &nbsp; FS_component(component_type=3D4, value=3Dbytearray([0x01, =
0x46, 0x81, 0x50]))</font></div><div class=3D""><font face=3D"Courier" =
size=3D"1" class=3D"">&nbsp; &nbsp; ])</font></div><div class=3D""><font =
face=3D"Courier" size=3D"1" class=3D""><br class=3D""></font></div><div =
class=3D""><font face=3D"Courier" size=3D"1" class=3D"">&nbsp; &nbsp; =
fs2 =3D FS_nlri(components=3D[</font></div><div class=3D""><font =
face=3D"Courier" size=3D"1" class=3D"">&nbsp; &nbsp; &nbsp; &nbsp; =
FS_component(component_type=3DIP_DESTINATION, =
value=3Dipaddress.ip_network('88.88.88.0/24')),</font></div><div =
class=3D""><font face=3D"Courier" size=3D"1" class=3D"">&nbsp; &nbsp; =
&nbsp; &nbsp; FS_component(component_type=3D4, value=3Dbytearray([0x03, =
0x5a, 0xc5, 0x6e]))</font></div><div class=3D""><font face=3D"Courier" =
size=3D"1" class=3D"">&nbsp; &nbsp; ])</font></div><div class=3D""><font =
face=3D"Courier" size=3D"1" class=3D"">&nbsp; &nbsp; =
print(flow_rule_cmp(fs1, fs2))</font></div><div class=3D""><br =
class=3D""></div><div class=3D"">What happens is (I refer to line =
numbers of the code in the github repo</div><div class=3D""><a =
href=3D"https://github.com/stoffi92/flowspec-cmp/blob/master/flow_cmp.py" =
class=3D"">https://github.com/stoffi92/flowspec-cmp/blob/master/flow_cmp.p=
y</a>&nbsp;:</div></div><div class=3D""><br class=3D""></div><div =
class=3D"">*) The IP components are compared and as you mentioned: no =
decision can be made since the ip components are equal. (we reach line =
74 for the equal ip components and continue with the next =
iteration)</div><div class=3D""><br class=3D""></div><div class=3D"">*) =
The second component _types_ are equal but not IP (we end up in the =
branch in line 80 since the components are type=3D4 and not 1 or =
2)</div><div class=3D""><br class=3D""></div><div class=3D"">*) The =
length of the second components is compared and equal, so we continue in =
line 82</div><div class=3D""><br class=3D""></div><div class=3D"">** See =
below: this is basically where the compare that you asked for happens =
**</div><div class=3D""><br class=3D""></div><div class=3D"">*) Now we =
come to the point where we compare the string of bytes one by one. As =
long as they are equal. (this is basically what memcmp does - this is =
not very explicit in the python code, since it is done by the &lt;, &gt; =
operators for the bytearray implicitly)</div><div class=3D""><br =
class=3D""></div><div class=3D"">In your case what it does is, that it =
compares 0x01 to 0x03 and figures out that 0x01 is the lower value so it =
takes the branch in line 84 and returns with A_HAS_PRECEDENCE from line =
85 (if both of your components would start with 0x01 it would continue =
to the second byte and so on).</div><div class=3D""><br =
class=3D""></div><div class=3D"">Your first FS nlri has precedence =
because of the =E2=80=9Clower=E2=80=9D value.</div><div class=3D""><br =
class=3D""></div><div class=3D""><blockquote type=3D"cite" class=3D""><div=
 class=3D"gmail_extra"><div class=3D"gmail_quote"><blockquote =
class=3D"gmail_quote" style=3D"margin: 0px 0px 0px 0.8ex; =
border-left-width: 1px; border-left-style: solid; border-left-color: =
rgb(204, 204, 204); padding-left: 1ex;"><div class=3D"" =
style=3D"word-wrap: break-word; line-break: after-white-space;"><div =
class=3D""><div class=3D""><blockquote type=3D"cite" class=3D""><div =
class=3D""><div class=3D""><div class=3D"h5"><div dir=3D"ltr" =
class=3D""><div class=3D"">01&nbsp;<b class=3D"">18 58 58 =
58</b>&nbsp;04&nbsp;<b class=3D"">01 46 81 50&nbsp; ----&gt; =
Dst.Prefix:&nbsp;<a href=3D"http://88.88.88.0/24" target=3D"_blank" =
class=3D"">88.88.88.0/24</a>&nbsp; Port: 70 | =
80</b></div></div></div></div></div></blockquote></div></div></div></block=
quote></div></div></blockquote><br class=3D""></div><div =
class=3D"">Discamer: I assumed that you encoded the components themselfs =
correctly (the 01 46 81 50 and 03 5a c5 6e)</div><div class=3D""><br =
class=3D""></div><div class=3D"">Does this answer your =
question?</div><div class=3D""><br class=3D""></div><div =
class=3D"">Christoph</div><div class=3D""><br class=3D""></div><div =
class=3D""><div class=3D"">
<div style=3D"color: rgb(0, 0, 0); font-family: Helvetica; font-size: =
12px; font-style: normal; font-variant-caps: normal; font-weight: =
normal; letter-spacing: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-size-adjust: auto; =
-webkit-text-stroke-width: 0px;">--&nbsp;<br class=3D"">Christoph =
Loibl<br class=3D""><a href=3D"mailto:c@tix.at" =
class=3D"">c@tix.at</a>&nbsp;| CL8-RIPE | PGP-Key-ID:&nbsp;0x4B2C0055 =
|&nbsp;<a href=3D"http://www.nextlayer.at" =
class=3D"">http://www.nextlayer.at</a></div><div style=3D"color: rgb(0, =
0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: normal; letter-spacing: normal; =
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><br =
class=3D""></div><br class=3D"Apple-interchange-newline">
</div>
<div><br class=3D""><blockquote type=3D"cite" class=3D""><div =
class=3D"">On 15.02.2018, at 05:08, PVLR Pavana Murthy &lt;<a =
href=3D"mailto:pvlrpm@gmail.com" class=3D"">pvlrpm@gmail.com</a>&gt; =
wrote:</div><br class=3D"Apple-interchange-newline"><div class=3D""><div =
dir=3D"ltr" class=3D"">Hi Christoph,<div class=3D"">&nbsp; Even in =
the&nbsp;

<span =
style=3D"color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.8px=
;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;=
font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;tex=
t-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(=
255,255,255);text-decoration-style:initial;text-decoration-color:initial;f=
loat:none;display:inline" class=3D"">RFC5575bis,&nbsp;</span>&nbsp;the =
following is given&nbsp;&nbsp;for comparing non-prefix type =
components.&nbsp;</div><div class=3D""><br class=3D"">

<pre class=3D"gmail-newpage" style=3D"font-size: 13.3333px; margin-top: =
0px; margin-bottom: 0px; font-style: normal; font-variant-ligatures: =
normal; font-variant-caps: normal; font-weight: 400; letter-spacing: =
normal; text-align: start; text-indent: 0px; text-transform: none; =
word-spacing: 0px;"> else:
               # assuming comp_a.value, comp_b.value of type bytearray
               if len(comp_a.value) =3D=3D len(comp_b.value):
                   if comp_a.value &gt; comp_b.value:
                       return B_HAS_PRECEDENCE
                   if comp_a.value &lt; comp_b.value:
                       return A_HAS_PRECEDENCE
                   # components equal -&gt; continue with next component
               else:
                   common =3D min(len(comp_a.value), len(comp_b.value))
                   if comp_a.value[:common] &gt; comp_b.value[:common]:
                       return B_HAS_PRECEDENCE
                   elif comp_a.value[:common] &lt; =
comp_b.value[:common]:
                       return A_HAS_PRECEDENCE
                   # the first common bytes match
                   elif len(comp_a.value) &gt; len(comp_b.value):
                       return A_HAS_PRECEDENCE
                   else:
                       return B_HAS_PRECEDENCE</pre><pre =
class=3D"gmail-newpage" style=3D"font-size: 13.3333px; margin-top: 0px; =
margin-bottom: 0px; font-style: normal; font-variant-ligatures: normal; =
font-variant-caps: normal; font-weight: 400; letter-spacing: normal; =
text-align: start; text-indent: 0px; text-transform: none; word-spacing: =
0px;"><br class=3D""></pre><pre class=3D"gmail-newpage" =
style=3D"font-size: 13.3333px; margin-top: 0px; margin-bottom: 0px; =
font-style: normal; font-variant-ligatures: normal; font-variant-caps: =
normal; letter-spacing: normal; text-align: start; text-indent: 0px; =
text-transform: none; word-spacing: 0px;"><font face=3D"arial, =
helvetica, sans-serif" style=3D"" class=3D""><b class=3D"">What is  =
comp_a.value here ? Is it the binary sting of [op, value]/[op,bitmask] =
or only value/bitmask ?</b></font></pre><pre class=3D"gmail-newpage" =
style=3D"font-size: 13.3333px; margin-top: 0px; margin-bottom: 0px; =
font-style: normal; font-variant-ligatures: normal; font-variant-caps: =
normal; letter-spacing: normal; text-align: start; text-indent: 0px; =
text-transform: none; word-spacing: 0px;"><font face=3D"arial, =
helvetica, sans-serif" style=3D"" class=3D""><b class=3D""><br =
class=3D""></b></font></pre><pre class=3D"gmail-newpage" =
style=3D"font-size: 13.3333px; margin-top: 0px; margin-bottom: 0px; =
font-style: normal; font-variant-ligatures: normal; font-variant-caps: =
normal; letter-spacing: normal; text-align: start; text-indent: 0px; =
text-transform: none; word-spacing: 0px;"><font face=3D"arial, =
helvetica, sans-serif" style=3D"" class=3D"">Thanks,</font></pre><pre =
class=3D"gmail-newpage" style=3D"font-size: 13.3333px; margin-top: 0px; =
margin-bottom: 0px; font-style: normal; font-variant-ligatures: normal; =
font-variant-caps: normal; letter-spacing: normal; text-align: start; =
text-indent: 0px; text-transform: none; word-spacing: 0px;"><font =
face=3D"arial, helvetica, sans-serif" style=3D"" =
class=3D"">Pavana.</font></pre>

</div></div><div class=3D"gmail_extra"><br class=3D""><div =
class=3D"gmail_quote">On Thu, Feb 15, 2018 at 3:11 AM, Christoph Loibl =
<span dir=3D"ltr" class=3D"">&lt;<a href=3D"mailto:c@tix.at" =
target=3D"_blank" class=3D"">c@tix.at</a>&gt;</span> wrote:<br =
class=3D""><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 =
.8ex;border-left:1px #ccc solid;padding-left:1ex"><div =
style=3D"word-wrap:break-word;line-break:after-white-space" class=3D"">Hi =
Pavana,<div class=3D""><br class=3D""></div><div class=3D"">Did you have =
a look into the actual code (thanks to Job=E2=80=99s comment) that is =
contained in the RFC5575bis draft which should be identical from the =
behaviour:</div><div class=3D""><br class=3D""></div><div class=3D""><a =
href=3D"https://tools.ietf.org/html/draft-ietf-idr-rfc5575bis-06" =
target=3D"_blank" class=3D"">https://tools.ietf.org/html/<wbr =
class=3D"">draft-ietf-idr-rfc5575bis-06</a></div><div class=3D""><br =
class=3D""></div><div class=3D"">Christoph</div><div class=3D""><br =
class=3D""><div class=3D"">
<div style=3D"font-family: Helvetica; font-size: 12px; font-style: =
normal; font-variant-caps: normal; font-weight: normal; letter-spacing: =
normal; text-align: start; text-indent: 0px; text-transform: none; =
white-space: normal; word-spacing: 0px;" class=3D"">--&nbsp;<br =
class=3D"">Christoph Loibl<br class=3D""><a href=3D"mailto:c@tix.at" =
target=3D"_blank" class=3D"">c@tix.at</a>&nbsp;| CL8-RIPE | =
PGP-Key-ID:&nbsp;0x4B2C0055 |&nbsp;<a href=3D"http://www.nextlayer.at/" =
target=3D"_blank" class=3D"">http://www.nextlayer.at</a></div><div =
style=3D"font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: normal; letter-spacing: normal; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; word-spacing: 0px;" class=3D""><br class=3D""></div><br =
class=3D"m_-4693473135615231940Apple-interchange-newline">
</div>
<div class=3D""><br class=3D""><blockquote type=3D"cite" class=3D""><div =
class=3D""><div class=3D"h5"><div class=3D"">On 12.02.2018, at 12:03, =
PVLR Pavana Murthy &lt;<a href=3D"mailto:pvlrpm@gmail.com" =
target=3D"_blank" class=3D"">pvlrpm@gmail.com</a>&gt; wrote:</div><br =
class=3D"m_-4693473135615231940Apple-interchange-newline"></div></div><div=
 class=3D""><div class=3D""><div class=3D"h5"><div dir=3D"ltr" =
class=3D"">Hello,<div class=3D"">&nbsp; In the RFC 5575, the following =
is given for the comparing the Flowspec components of types other then =
prefix.</div><div class=3D""><font face=3D"comic sans ms, sans-serif" =
class=3D""><br class=3D""></font></div><div class=3D""><font face=3D"comic=
 sans ms, sans-serif" class=3D"">} else {</font></div><div =
class=3D""><font face=3D"comic sans ms, sans-serif" class=3D"">common =
=3D</font></div><div class=3D""><font face=3D"comic sans ms, sans-serif" =
class=3D"">MIN(component_length(comp1), =
component_length(comp2));</font></div><div class=3D""><font face=3D"comic =
sans ms, sans-serif" class=3D"">cmp =3D memcmp(data(comp1), data(comp2), =
common);</font></div><div class=3D""><font face=3D"comic sans ms, =
sans-serif" class=3D"">// not equal, lowest value has =
precedence</font></div><div class=3D""><font face=3D"comic sans ms, =
sans-serif" class=3D"">// equal, longest string has =
precedence</font></div><div class=3D""><font face=3D"comic sans ms, =
sans-serif" class=3D"">}&nbsp;</font></div><div class=3D""><br =
class=3D""></div><div class=3D""><br class=3D""></div><div =
class=3D"">Here, what does <b class=3D"">data</b> refrer to&nbsp; =
?</div><div class=3D""><br class=3D""></div><div class=3D"">Is it the =
binary form of 1) [op, value]&gt; / [op, bitmask]&nbsp; or 2) Just =
[value] / [bitmask]</div><div class=3D""><br class=3D""></div><div =
class=3D"">eg:<br class=3D""></div><div class=3D""><br =
class=3D""></div><div class=3D""><br class=3D""></div><div =
class=3D"">1)&nbsp; 01 <b class=3D"">18 58 58 58</b> 04 <b class=3D"">01 =
46 81 50&nbsp; ----&gt; Dst.Prefix: <a href=3D"http://88.88.88.0/24" =
target=3D"_blank" class=3D"">88.88.88.0/24</a>&nbsp; Port: 70 | =
80</b></div><div class=3D""><b class=3D"">&nbsp;</b></div><div =
class=3D"">2)&nbsp; 01<b class=3D""> 18 58 58 58 </b>04<b class=3D""> 03 =
5a c5 6e&nbsp; &nbsp; ----&gt;&nbsp;&nbsp;

<b =
style=3D"color:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;=
font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;l=
etter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;=
white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text=
-decoration-style:initial;text-decoration-color:initial" =
class=3D"">Dst.Prefix: <a href=3D"http://88.88.88.0/24" target=3D"_blank" =
class=3D"">88.88.88.0/24</a>&nbsp; Port:</b>&nbsp;&gt;=3D90 &amp; &lt;=3D =
110</b><br class=3D""></div><div class=3D""><b class=3D""><br =
class=3D""></b></div><div class=3D""><b class=3D"">In the above FS =
rules,&nbsp; Dst. Prefix is same in both, so we need to compare the data =
of next type 4 (Port).&nbsp;</b></div><div class=3D""><b class=3D"">So =
do we need to do memcmp of&nbsp;&nbsp;(<b =
style=3D"color:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;=
font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;l=
etter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;=
white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text=
-decoration-style:initial;text-decoration-color:initial" class=3D"">01 =
46 81 50) and&nbsp;&nbsp;(<b =
style=3D"color:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;=
font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;l=
etter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;=
white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text=
-decoration-style:initial;text-decoration-color:initial" class=3D"">03 =
5a c5 6e) ?</b></b></b></div><div class=3D""><b class=3D""><b =
style=3D"color:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;=
font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;l=
etter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;=
white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text=
-decoration-style:initial;text-decoration-color:initial" class=3D""><b =
style=3D"color:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;=
font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;l=
etter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;=
white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text=
-decoration-style:initial;text-decoration-color:initial" class=3D""><br =
class=3D""></b></b></b></div><div class=3D""><span =
style=3D"color:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;=
font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;l=
etter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;=
white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text=
-decoration-style:initial;text-decoration-color:initial" class=3D""><span =
style=3D"color:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;=
font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;l=
etter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;=
white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text=
-decoration-style:initial;text-decoration-color:initial" =
class=3D"">Thanks,</span></span></div><div class=3D""><span =
style=3D"font-weight:bold;color:rgb(34,34,34);font-family:arial,sans-serif=
;font-size:small;font-style:normal;font-variant-ligatures:normal;font-vari=
ant-caps:normal;letter-spacing:normal;text-align:start;text-indent:0px;tex=
t-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(=
255,255,255);text-decoration-style:initial;text-decoration-color:initial" =
class=3D""><span =
style=3D"color:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;=
font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;l=
etter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;=
white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text=
-decoration-style:initial;text-decoration-color:initial;font-weight:normal=
" class=3D"">Pavana</span><b =
style=3D"font-weight:bold;color:rgb(34,34,34);font-family:arial,sans-serif=
;font-size:small;font-style:normal;font-variant-ligatures:normal;font-vari=
ant-caps:normal;letter-spacing:normal;text-align:start;text-indent:0px;tex=
t-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(=
255,255,255);text-decoration-style:initial;text-decoration-color:initial" =
class=3D"">.</b></span></div><div class=3D""><b class=3D""><br =
class=3D""></b></div><div class=3D""><b class=3D""><br =
class=3D""></b></div><div class=3D""><b class=3D""><br =
class=3D""></b></div></div></div></div>
______________________________<wbr class=3D"">_________________<br =
class=3D"">Idr mailing list<br class=3D""><a href=3D"mailto:Idr@ietf.org" =
target=3D"_blank" class=3D"">Idr@ietf.org</a><br class=3D""><a =
href=3D"https://www.ietf.org/mailman/listinfo/idr" target=3D"_blank" =
class=3D"">https://www.ietf.org/mailman/<wbr =
class=3D"">listinfo/idr</a><br class=3D""></div></blockquote></div><br =
class=3D""></div></div></blockquote></div><br class=3D""></div>
</div></blockquote></div><br class=3D""></div></body></html>=

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From: PVLR Pavana Murthy <pvlrpm@gmail.com>
Date: Thu, 15 Feb 2018 14:35:49 +0530
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To: Christoph Loibl <c@tix.at>
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Subject: Re: [Idr] BGP Flowspec rules precedence order (RFC 5575)
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Hi Christoph,
   Thanks a lot for the detailed explanation. That answers my question
completely :-).



On Thu, Feb 15, 2018 at 1:07 PM, Christoph Loibl <c@tix.at> wrote:

> Hi Pavana,
>
> You can rather easily test the behaviour when you feed your case into the
> python function:
>
> def main():
>     fs1 =3D FS_nlri(components=3D[
>         FS_component(component_type=3DIP_DESTINATION,
> value=3Dipaddress.ip_network('88.88.88.0/24')),
>         FS_component(component_type=3D4, value=3Dbytearray([0x01, 0x46, 0=
x81,
> 0x50]))
>     ])
>
>     fs2 =3D FS_nlri(components=3D[
>         FS_component(component_type=3DIP_DESTINATION,
> value=3Dipaddress.ip_network('88.88.88.0/24')),
>         FS_component(component_type=3D4, value=3Dbytearray([0x03, 0x5a, 0=
xc5,
> 0x6e]))
>     ])
>     print(flow_rule_cmp(fs1, fs2))
>
> What happens is (I refer to line numbers of the code in the github repo
> https://github.com/stoffi92/flowspec-cmp/blob/master/flow_cmp.py :
>
> *) The IP components are compared and as you mentioned: no decision can b=
e
> made since the ip components are equal. (we reach line 74 for the equal i=
p
> components and continue with the next iteration)
>
> *) The second component _types_ are equal but not IP (we end up in the
> branch in line 80 since the components are type=3D4 and not 1 or 2)
>
> *) The length of the second components is compared and equal, so we
> continue in line 82
>
> ** See below: this is basically where the compare that you asked for
> happens **
>
> *) Now we come to the point where we compare the string of bytes one by
> one. As long as they are equal. (this is basically what memcmp does - thi=
s
> is not very explicit in the python code, since it is done by the <, >
> operators for the bytearray implicitly)
>
> In your case what it does is, that it compares 0x01 to 0x03 and figures
> out that 0x01 is the lower value so it takes the branch in line 84 and
> returns with A_HAS_PRECEDENCE from line 85 (if both of your components
> would start with 0x01 it would continue to the second byte and so on).
>
> Your first FS nlri has precedence because of the =E2=80=9Clower=E2=80=9D =
value.
>
> 01 *18 58 58 58* 04 *01 46 81 50  ----> Dst.Prefix: 88.88.88.0/24
>> <http://88.88.88.0/24>  Port: 70 | 80*
>>
>>
> Discamer: I assumed that you encoded the components themselfs correctly
> (the 01 46 81 50 and 03 5a c5 6e)
>
> Does this answer your question?
>
> Christoph
>
> --
> Christoph Loibl
> c@tix.at | CL8-RIPE | PGP-Key-ID: 0x4B2C0055 | http://www.nextlayer.at
>
>
>
> On 15.02.2018, at 05:08, PVLR Pavana Murthy <pvlrpm@gmail.com> wrote:
>
> Hi Christoph,
>   Even in the  RFC5575bis,  the following is given  for comparing
> non-prefix type components.
>
>  else:
>                # assuming comp_a.value, comp_b.value of type bytearray
>                if len(comp_a.value) =3D=3D len(comp_b.value):
>                    if comp_a.value > comp_b.value:
>                        return B_HAS_PRECEDENCE
>                    if comp_a.value < comp_b.value:
>                        return A_HAS_PRECEDENCE
>                    # components equal -> continue with next component
>                else:
>                    common =3D min(len(comp_a.value), len(comp_b.value))
>                    if comp_a.value[:common] > comp_b.value[:common]:
>                        return B_HAS_PRECEDENCE
>                    elif comp_a.value[:common] < comp_b.value[:common]:
>                        return A_HAS_PRECEDENCE
>                    # the first common bytes match
>                    elif len(comp_a.value) > len(comp_b.value):
>                        return A_HAS_PRECEDENCE
>                    else:
>                        return B_HAS_PRECEDENCE
>
>
> *What is  comp_a.value here ? Is it the binary sting of [op, value]/[op,b=
itmask] or only value/bitmask ?*
>
>
> Thanks,
>
> Pavana.
>
>
> On Thu, Feb 15, 2018 at 3:11 AM, Christoph Loibl <c@tix.at> wrote:
>
>> Hi Pavana,
>>
>> Did you have a look into the actual code (thanks to Job=E2=80=99s commen=
t) that
>> is contained in the RFC5575bis draft which should be identical from the
>> behaviour:
>>
>> https://tools.ietf.org/html/draft-ietf-idr-rfc5575bis-06
>>
>> Christoph
>>
>> --
>> Christoph Loibl
>> c@tix.at | CL8-RIPE | PGP-Key-ID: 0x4B2C0055 | http://www.nextlayer.at
>>
>>
>>
>> On 12.02.2018, at 12:03, PVLR Pavana Murthy <pvlrpm@gmail.com> wrote:
>>
>> Hello,
>>   In the RFC 5575, the following is given for the comparing the Flowspec
>> components of types other then prefix.
>>
>> } else {
>> common =3D
>> MIN(component_length(comp1), component_length(comp2));
>> cmp =3D memcmp(data(comp1), data(comp2), common);
>> // not equal, lowest value has precedence
>> // equal, longest string has precedence
>> }
>>
>>
>> Here, what does *data* refrer to  ?
>>
>> Is it the binary form of 1) [op, value]> / [op, bitmask]  or 2) Just
>> [value] / [bitmask]
>>
>> eg:
>>
>>
>> 1)  01 *18 58 58 58* 04 *01 46 81 50  ----> Dst.Prefix: 88.88.88.0/24
>> <http://88.88.88.0/24>  Port: 70 | 80*
>>
>> 2)  01* 18 58 58 58 *04* 03 5a c5 6e    ---->   Dst.Prefix:
>> 88.88.88.0/24 <http://88.88.88.0/24>  Port: >=3D90 & <=3D 110*
>>
>> *In the above FS rules,  Dst. Prefix is same in both, so we need to
>> compare the data of next type 4 (Port). *
>> *So do we need to do memcmp of  (01 46 81 50) and  (03 5a c5 6e) ?*
>>
>> Thanks,
>> Pavana*.*
>>
>>
>>
>> _______________________________________________
>> Idr mailing list
>> Idr@ietf.org
>> https://www.ietf.org/mailman/listinfo/idr
>>
>>
>>
>
>

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<div dir=3D"ltr">Hi Christoph,<div>=C2=A0 =C2=A0Thanks a lot for the detail=
ed explanation. That answers my question completely :-).</div><div><br></di=
v><div><br></div></div><div class=3D"gmail_extra"><br><div class=3D"gmail_q=
uote">On Thu, Feb 15, 2018 at 1:07 PM, Christoph Loibl <span dir=3D"ltr">&l=
t;<a href=3D"mailto:c@tix.at" target=3D"_blank">c@tix.at</a>&gt;</span> wro=
te:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-=
left:1px #ccc solid;padding-left:1ex"><div style=3D"word-wrap:break-word;li=
ne-break:after-white-space">Hi Pavana,<div><br></div><div>You can rather ea=
sily test the behaviour when you feed your case into the python function:</=
div><div><br></div><div><div><font face=3D"Courier" size=3D"1">def main():<=
/font></div><div><font face=3D"Courier" size=3D"1">=C2=A0 =C2=A0 fs1 =3D FS=
_nlri(components=3D[</font></div><div><font face=3D"Courier" size=3D"1">=C2=
=A0 =C2=A0 =C2=A0 =C2=A0 FS_component(component_type=3D<wbr>IP_DESTINATION,=
 value=3Dipaddress.ip_network(&#39;<a href=3D"http://88.88.88.0/24&#39;)" t=
arget=3D"_blank">88<wbr>.88.88.0/24&#39;)</a>),</font></div><div><font face=
=3D"Courier" size=3D"1">=C2=A0 =C2=A0 =C2=A0 =C2=A0 FS_component(component_=
type=3D4, value=3Dbytearray([0x01, 0x46, 0x81, 0x50]))</font></div><div><fo=
nt face=3D"Courier" size=3D"1">=C2=A0 =C2=A0 ])</font></div><div><font face=
=3D"Courier" size=3D"1"><br></font></div><div><font face=3D"Courier" size=
=3D"1">=C2=A0 =C2=A0 fs2 =3D FS_nlri(components=3D[</font></div><div><font =
face=3D"Courier" size=3D"1">=C2=A0 =C2=A0 =C2=A0 =C2=A0 FS_component(compon=
ent_type=3D<wbr>IP_DESTINATION, value=3Dipaddress.ip_network(&#39;<a href=
=3D"http://88.88.88.0/24&#39;)" target=3D"_blank">88<wbr>.88.88.0/24&#39;)<=
/a>),</font></div><div><font face=3D"Courier" size=3D"1">=C2=A0 =C2=A0 =C2=
=A0 =C2=A0 FS_component(component_type=3D4, value=3Dbytearray([0x03, 0x5a, =
0xc5, 0x6e]))</font></div><div><font face=3D"Courier" size=3D"1">=C2=A0 =C2=
=A0 ])</font></div><div><font face=3D"Courier" size=3D"1">=C2=A0 =C2=A0 pri=
nt(flow_rule_cmp(fs1, fs2))</font></div><div><br></div><div>What happens is=
 (I refer to line numbers of the code in the github repo</div><div><a href=
=3D"https://github.com/stoffi92/flowspec-cmp/blob/master/flow_cmp.py" targe=
t=3D"_blank">https://github.com/stoffi92/<wbr>flowspec-cmp/blob/master/flow=
_<wbr>cmp.py</a>=C2=A0:</div></div><div><br></div><div>*) The IP components=
 are compared and as you mentioned: no decision can be made since the ip co=
mponents are equal. (we reach line 74 for the equal ip components and conti=
nue with the next iteration)</div><div><br></div><div>*) The second compone=
nt _types_ are equal but not IP (we end up in the branch in line 80 since t=
he components are type=3D4 and not 1 or 2)</div><div><br></div><div>*) The =
length of the second components is compared and equal, so we continue in li=
ne 82</div><div><br></div><div>** See below: this is basically where the co=
mpare that you asked for happens **</div><div><br></div><div>*) Now we come=
 to the point where we compare the string of bytes one by one. As long as t=
hey are equal. (this is basically what memcmp does - this is not very expli=
cit in the python code, since it is done by the &lt;, &gt; operators for th=
e bytearray implicitly)</div><div><br></div><div>In your case what it does =
is, that it compares 0x01 to 0x03 and figures out that 0x01 is the lower va=
lue so it takes the branch in line 84 and returns with A_HAS_PRECEDENCE fro=
m line 85 (if both of your components would start with 0x01 it would contin=
ue to the second byte and so on).</div><div><br></div><div>Your first FS nl=
ri has precedence because of the =E2=80=9Clower=E2=80=9D value.</div><span =
class=3D""><div><br></div><div><blockquote type=3D"cite"><div class=3D"gmai=
l_extra"><div class=3D"gmail_quote"><blockquote class=3D"gmail_quote" style=
=3D"margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;=
border-left-color:rgb(204,204,204);padding-left:1ex"><div style=3D"word-wra=
p:break-word;line-break:after-white-space"><div><div><blockquote type=3D"ci=
te"><div><div><div class=3D"m_-4395167006316299433h5"><div dir=3D"ltr"><div=
>01=C2=A0<b>18 58 58 58</b>=C2=A004=C2=A0<b>01 46 81 50=C2=A0 ----&gt; Dst.=
Prefix:=C2=A0<a href=3D"http://88.88.88.0/24" target=3D"_blank">88.88.88.0/=
24</a>=C2=A0 Port: 70 | 80</b></div></div></div></div></div></blockquote></=
div></div></div></blockquote></div></div></blockquote><br></div></span><div=
>Discamer: I assumed that you encoded the components themselfs correctly (t=
he 01 46 81 50 and 03 5a c5 6e)</div><div><br></div><div>Does this answer y=
our question?</div><span class=3D"HOEnZb"><font color=3D"#888888"><div><br>=
</div><div>Christoph</div><div><br></div></font></span><div><span class=3D"=
"><div>
<div style=3D"color:rgb(0,0,0);font-family:Helvetica;font-size:12px;font-st=
yle:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:norma=
l;text-align:start;text-indent:0px;text-transform:none;white-space:normal;w=
ord-spacing:0px">--=C2=A0<br>Christoph Loibl<br><a href=3D"mailto:c@tix.at"=
 target=3D"_blank">c@tix.at</a>=C2=A0| CL8-RIPE | PGP-Key-ID:=C2=A00x4B2C00=
55 |=C2=A0<a href=3D"http://www.nextlayer.at" target=3D"_blank">http://www.=
nextlayer.at</a></div><div style=3D"color:rgb(0,0,0);font-family:Helvetica;=
font-size:12px;font-style:normal;font-variant-caps:normal;font-weight:norma=
l;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:non=
e;white-space:normal;word-spacing:0px"><br></div><br class=3D"m_-4395167006=
316299433Apple-interchange-newline">
</div>
</span><div><div class=3D"h5"><div><br><blockquote type=3D"cite"><div>On 15=
.02.2018, at 05:08, PVLR Pavana Murthy &lt;<a href=3D"mailto:pvlrpm@gmail.c=
om" target=3D"_blank">pvlrpm@gmail.com</a>&gt; wrote:</div><br class=3D"m_-=
4395167006316299433Apple-interchange-newline"><div><div dir=3D"ltr">Hi Chri=
stoph,<div>=C2=A0 Even in the=C2=A0

<span style=3D"color:rgb(34,34,34);font-family:arial,sans-serif;font-size:1=
2.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:nor=
mal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;=
text-transform:none;white-space:normal;word-spacing:0px;background-color:rg=
b(255,255,255);text-decoration-style:initial;text-decoration-color:initial;=
float:none;display:inline">RFC5575bis,=C2=A0</span>=C2=A0the following is g=
iven=C2=A0=C2=A0for comparing non-prefix type components.=C2=A0</div><div><=
br>

<pre class=3D"m_-4395167006316299433gmail-newpage" style=3D"font-size:13.33=
33px;margin-top:0px;margin-bottom:0px;font-style:normal;font-variant-ligatu=
res:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;t=
ext-align:start;text-indent:0px;text-transform:none;word-spacing:0px"> else=
:
               # assuming comp_a.value, comp_b.value of type bytearray
               if len(comp_a.value) =3D=3D len(comp_b.value):
                   if comp_a.value &gt; comp_b.value:
                       return B_HAS_PRECEDENCE
                   if comp_a.value &lt; comp_b.value:
                       return A_HAS_PRECEDENCE
                   # components equal -&gt; continue with next component
               else:
                   common =3D min(len(comp_a.value), len(comp_b.value))
                   if comp_a.value[:common] &gt; comp_b.value[:common]:
                       return B_HAS_PRECEDENCE
                   elif comp_a.value[:common] &lt; comp_b.value[:common]:
                       return A_HAS_PRECEDENCE
                   # the first common bytes match
                   elif len(comp_a.value) &gt; len(comp_b.value):
                       return A_HAS_PRECEDENCE
                   else:
                       return B_HAS_PRECEDENCE</pre><pre class=3D"m_-439516=
7006316299433gmail-newpage" style=3D"font-size:13.3333px;margin-top:0px;mar=
gin-bottom:0px;font-style:normal;font-variant-ligatures:normal;font-variant=
-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-in=
dent:0px;text-transform:none;word-spacing:0px"><br></pre><pre class=3D"m_-4=
395167006316299433gmail-newpage" style=3D"font-size:13.3333px;margin-top:0p=
x;margin-bottom:0px;font-style:normal;font-variant-ligatures:normal;font-va=
riant-caps:normal;letter-spacing:normal;text-align:start;text-indent:0px;te=
xt-transform:none;word-spacing:0px"><font face=3D"arial, helvetica, sans-se=
rif"><b>What is  comp_a.value here ? Is it the binary sting of [op, value]/=
[op,bitmask] or only value/bitmask ?</b></font></pre><pre class=3D"m_-43951=
67006316299433gmail-newpage" style=3D"font-size:13.3333px;margin-top:0px;ma=
rgin-bottom:0px;font-style:normal;font-variant-ligatures:normal;font-varian=
t-caps:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-t=
ransform:none;word-spacing:0px"><font face=3D"arial, helvetica, sans-serif"=
><b><br></b></font></pre><pre class=3D"m_-4395167006316299433gmail-newpage"=
 style=3D"font-size:13.3333px;margin-top:0px;margin-bottom:0px;font-style:n=
ormal;font-variant-ligatures:normal;font-variant-caps:normal;letter-spacing=
:normal;text-align:start;text-indent:0px;text-transform:none;word-spacing:0=
px"><font face=3D"arial, helvetica, sans-serif">Thanks,</font></pre><pre cl=
ass=3D"m_-4395167006316299433gmail-newpage" style=3D"font-size:13.3333px;ma=
rgin-top:0px;margin-bottom:0px;font-style:normal;font-variant-ligatures:nor=
mal;font-variant-caps:normal;letter-spacing:normal;text-align:start;text-in=
dent:0px;text-transform:none;word-spacing:0px"><font face=3D"arial, helveti=
ca, sans-serif">Pavana.</font></pre>

</div></div><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">On Th=
u, Feb 15, 2018 at 3:11 AM, Christoph Loibl <span dir=3D"ltr">&lt;<a href=
=3D"mailto:c@tix.at" target=3D"_blank">c@tix.at</a>&gt;</span> wrote:<br><b=
lockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px =
#ccc solid;padding-left:1ex"><div style=3D"word-wrap:break-word;line-break:=
after-white-space">Hi Pavana,<div><br></div><div>Did you have a look into t=
he actual code (thanks to Job=E2=80=99s comment) that is contained in the R=
FC5575bis draft which should be identical from the behaviour:</div><div><br=
></div><div><a href=3D"https://tools.ietf.org/html/draft-ietf-idr-rfc5575bi=
s-06" target=3D"_blank">https://tools.ietf.org/html/dr<wbr>aft-ietf-idr-rfc=
5575bis-06</a></div><div><br></div><div>Christoph</div><div><br><div>
<div style=3D"font-family:Helvetica;font-size:12px;font-style:normal;font-v=
ariant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:star=
t;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px">=
--=C2=A0<br>Christoph Loibl<br><a href=3D"mailto:c@tix.at" target=3D"_blank=
">c@tix.at</a>=C2=A0| CL8-RIPE | PGP-Key-ID:=C2=A00x4B2C0055 |=C2=A0<a href=
=3D"http://www.nextlayer.at/" target=3D"_blank">http://www.nextlayer.at</a>=
</div><div style=3D"font-family:Helvetica;font-size:12px;font-style:normal;=
font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-alig=
n:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing=
:0px"><br></div><br class=3D"m_-4395167006316299433m_-4693473135615231940Ap=
ple-interchange-newline">
</div>
<div><br><blockquote type=3D"cite"><div><div class=3D"m_-439516700631629943=
3h5"><div>On 12.02.2018, at 12:03, PVLR Pavana Murthy &lt;<a href=3D"mailto=
:pvlrpm@gmail.com" target=3D"_blank">pvlrpm@gmail.com</a>&gt; wrote:</div><=
br class=3D"m_-4395167006316299433m_-4693473135615231940Apple-interchange-n=
ewline"></div></div><div><div><div class=3D"m_-4395167006316299433h5"><div =
dir=3D"ltr">Hello,<div>=C2=A0 In the RFC 5575, the following is given for t=
he comparing the Flowspec components of types other then prefix.</div><div>=
<font face=3D"comic sans ms, sans-serif"><br></font></div><div><font face=
=3D"comic sans ms, sans-serif">} else {</font></div><div><font face=3D"comi=
c sans ms, sans-serif">common =3D</font></div><div><font face=3D"comic sans=
 ms, sans-serif">MIN(component_length(comp1), component_length(comp2));</fo=
nt></div><div><font face=3D"comic sans ms, sans-serif">cmp =3D memcmp(data(=
comp1), data(comp2), common);</font></div><div><font face=3D"comic sans ms,=
 sans-serif">// not equal, lowest value has precedence</font></div><div><fo=
nt face=3D"comic sans ms, sans-serif">// equal, longest string has preceden=
ce</font></div><div><font face=3D"comic sans ms, sans-serif">}=C2=A0</font>=
</div><div><br></div><div><br></div><div>Here, what does <b>data</b> refrer=
 to=C2=A0 ?</div><div><br></div><div>Is it the binary form of 1) [op, value=
]&gt; / [op, bitmask]=C2=A0 or 2) Just [value] / [bitmask]</div><div><br></=
div><div>eg:<br></div><div><br></div><div><br></div><div>1)=C2=A0 01 <b>18 =
58 58 58</b> 04 <b>01 46 81 50=C2=A0 ----&gt; Dst.Prefix: <a href=3D"http:/=
/88.88.88.0/24" target=3D"_blank">88.88.88.0/24</a>=C2=A0 Port: 70 | 80</b>=
</div><div><b>=C2=A0</b></div><div>2)=C2=A0 01<b> 18 58 58 58 </b>04<b> 03 =
5a c5 6e=C2=A0 =C2=A0 ----&gt;=C2=A0=C2=A0

<b style=3D"color:rgb(34,34,34);font-family:arial,sans-serif;font-size:smal=
l;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;=
letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;=
white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-=
decoration-style:initial;text-decoration-color:initial">Dst.Prefix: <a href=
=3D"http://88.88.88.0/24" target=3D"_blank">88.88.88.0/24</a>=C2=A0 Port:</=
b>=C2=A0&gt;=3D90 &amp; &lt;=3D 110</b><br></div><div><b><br></b></div><div=
><b>In the above FS rules,=C2=A0 Dst. Prefix is same in both, so we need to=
 compare the data of next type 4 (Port).=C2=A0</b></div><div><b>So do we ne=
ed to do memcmp of=C2=A0=C2=A0(<b style=3D"color:rgb(34,34,34);font-family:=
arial,sans-serif;font-size:small;font-style:normal;font-variant-ligatures:n=
ormal;font-variant-caps:normal;letter-spacing:normal;text-align:start;text-=
indent:0px;text-transform:none;white-space:normal;word-spacing:0px;backgrou=
nd-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-col=
or:initial">01 46 81 50) and=C2=A0=C2=A0(<b style=3D"color:rgb(34,34,34);fo=
nt-family:arial,sans-serif;font-size:small;font-style:normal;font-variant-l=
igatures:normal;font-variant-caps:normal;letter-spacing:normal;text-align:s=
tart;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0p=
x;background-color:rgb(255,255,255);text-decoration-style:initial;text-deco=
ration-color:initial">03 5a c5 6e) ?</b></b></b></div><div><b><b style=3D"c=
olor:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;font-style:=
normal;font-variant-ligatures:normal;font-variant-caps:normal;letter-spacin=
g:normal;text-align:start;text-indent:0px;text-transform:none;white-space:n=
ormal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-st=
yle:initial;text-decoration-color:initial"><b style=3D"color:rgb(34,34,34);=
font-family:arial,sans-serif;font-size:small;font-style:normal;font-variant=
-ligatures:normal;font-variant-caps:normal;letter-spacing:normal;text-align=
:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:=
0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-de=
coration-color:initial"><br></b></b></b></div><div><span style=3D"color:rgb=
(34,34,34);font-family:arial,sans-serif;font-size:small;font-style:normal;f=
ont-variant-ligatures:normal;font-variant-caps:normal;letter-spacing:normal=
;text-align:start;text-indent:0px;text-transform:none;white-space:normal;wo=
rd-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:init=
ial;text-decoration-color:initial"><span style=3D"color:rgb(34,34,34);font-=
family:arial,sans-serif;font-size:small;font-style:normal;font-variant-liga=
tures:normal;font-variant-caps:normal;letter-spacing:normal;text-align:star=
t;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;b=
ackground-color:rgb(255,255,255);text-decoration-style:initial;text-decorat=
ion-color:initial">Thanks,</span></span></div><div><span style=3D"font-weig=
ht:bold;color:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;fo=
nt-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;lett=
er-spacing:normal;text-align:start;text-indent:0px;text-transform:none;whit=
e-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-deco=
ration-style:initial;text-decoration-color:initial"><span style=3D"color:rg=
b(34,34,34);font-family:arial,sans-serif;font-size:small;font-style:normal;=
font-variant-ligatures:normal;font-variant-caps:normal;letter-spacing:norma=
l;text-align:start;text-indent:0px;text-transform:none;white-space:normal;w=
ord-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:ini=
tial;text-decoration-color:initial;font-weight:normal">Pavana</span><b styl=
e=3D"font-weight:bold;color:rgb(34,34,34);font-family:arial,sans-serif;font=
-size:small;font-style:normal;font-variant-ligatures:normal;font-variant-ca=
ps:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-trans=
form:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,=
255);text-decoration-style:initial;text-decoration-color:initial">.</b></sp=
an></div><div><b><br></b></div><div><b><br></b></div><div><b><br></b></div>=
</div></div></div>
______________________________<wbr>_________________<br>Idr mailing list<br=
><a href=3D"mailto:Idr@ietf.org" target=3D"_blank">Idr@ietf.org</a><br><a h=
ref=3D"https://www.ietf.org/mailman/listinfo/idr" target=3D"_blank">https:/=
/www.ietf.org/mailman/l<wbr>istinfo/idr</a><br></div></blockquote></div><br=
></div></div></blockquote></div><br></div>
</div></blockquote></div><br></div></div></div></div></blockquote></div><br=
></div>

--f403045cf650bbd72405653c8886--


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Subject: Re: [Idr] Early Code Point allocation for draft-ietf-idr-eag-distribution-05 (12/8 to 12/22)
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Les - 

 

Not yet.   I have been sick for a week.  I'm trying to push things through
later today. 

 

Sue 

 

From: Idr [mailto:idr-bounces@ietf.org] On Behalf Of Les Ginsberg (ginsberg)
Sent: Tuesday, February 13, 2018 9:40 PM
To: Susan Hares; idr@ietf.org
Cc: idr-chairs@ietf.org
Subject: Re: [Idr] Early Code Point allocation for
draft-ietf-idr-eag-distribution-05 (12/8 to 12/22)

 

Sue -

 

Has early allocation been completed?

I don't see any code point assigned in the BGP-LS registry (apologies if I
missed it).

 

Thanx.

 

    Les

 

 

From: Idr [mailto:idr-bounces@ietf.org] On Behalf Of Susan Hares
Sent: Friday, January 19, 2018 7:45 PM
To: idr@ietf.org
Cc: idr-chairs@ietf.org
Subject: Re: [Idr] Early Code Point allocation for
draft-ietf-idr-eag-distribution-05 (12/8 to 12/22)

 

WG: 

 

We've received 7 positive comments for early allocation of the
draft-ietf-idr-eag-distribution-05.txt work.  There were no problems pointed
to with the draft-ietf-idr-eag-distribution-05.txt specification.   The WG
chairs usually like a few more positive comments, but the December time
period (12/8 to 12/22) may have reduced the number of comments.  We received
no substantial number of comments after the first week. 

 

Cisco has completed an implementation and is looking for an interoperability
test prior to shipping code. The work has implementations that need the
early allocation, a stable specification, and these positive comments on the
list.  I've received several comments requesting the processing of this
call.  Based on the WG continued request to get implementations early
allocation of code points, I'm going to declare WG consensus on allocating
these code points.  I will forward this early allocation request to Alvaro
Retana for processing. 

 

I think this points to the fact that we should go to single week early
allocation request.   The drafts either succeed or fail on the first week's
work. 

 

 

Sue Hares

WG Co-chair 

 

PS - I think this points to the fact that we should go to single week early
allocation request.   The drafts either succeed or fail on the first week's
work.   John and I are always looking for feedback to determine if we are
following the wishes of the IDR WG in getting this early allocations.    

 

 


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<html xmlns:v=3D"urn:schemas-microsoft-com:vml" =
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xmlns:w=3D"urn:schemas-microsoft-com:office:word" =
xmlns:m=3D"http://schemas.microsoft.com/office/2004/12/omml" =
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<o:idmap v:ext=3D"edit" data=3D"1" />
</o:shapelayout></xml><![endif]--></head><body lang=3DEN-US link=3Dblue =
vlink=3Dpurple><div class=3DWordSection1><p class=3DMsoNormal><span =
style=3D'color:#1F497D'>Les &#8211; <o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'color:#1F497D'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span style=3D'color:#1F497D'>Not yet.&nbsp;&nbsp; I =
have been sick for a week.&nbsp; I&#8217;m trying to push things through =
later today. <o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'color:#1F497D'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span style=3D'color:#1F497D'>Sue =
<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'color:#1F497D'><o:p>&nbsp;</o:p></span></p><div><div =
style=3D'border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in'><p class=3DMsoNormal><b><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span>=
</b><span style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'> =
Idr [mailto:idr-bounces@ietf.org] <b>On Behalf Of </b>Les Ginsberg =
(ginsberg)<br><b>Sent:</b> Tuesday, February 13, 2018 9:40 =
PM<br><b>To:</b> Susan Hares; idr@ietf.org<br><b>Cc:</b> =
idr-chairs@ietf.org<br><b>Subject:</b> Re: [Idr] Early Code Point =
allocation for draft-ietf-idr-eag-distribution-05 (12/8 to =
12/22)<o:p></o:p></span></p></div></div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal><span =
style=3D'color:#1F497D'>Sue &#8211;<o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'color:#1F497D'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span style=3D'color:#1F497D'>Has early allocation =
been completed?<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'color:#1F497D'>I don&#8217;t see any code point assigned in the =
BGP-LS registry (apologies if I missed it).<o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'color:#1F497D'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'color:#1F497D'>Thanx.<o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'color:#1F497D'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span style=3D'color:#1F497D'>&nbsp;&nbsp;&nbsp; =
Les<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'color:#1F497D'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'color:#1F497D'><o:p>&nbsp;</o:p></span></p><div =
style=3D'border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt'><div><div style=3D'border:none;border-top:solid #E1E1E1 =
1.0pt;padding:3.0pt 0in 0in 0in'><p class=3DMsoNormal><b>From:</b> Idr =
[<a =
href=3D"mailto:idr-bounces@ietf.org">mailto:idr-bounces@ietf.org</a>] =
<b>On Behalf Of </b>Susan Hares<br><b>Sent:</b> Friday, January 19, 2018 =
7:45 PM<br><b>To:</b> <a =
href=3D"mailto:idr@ietf.org">idr@ietf.org</a><br><b>Cc:</b> <a =
href=3D"mailto:idr-chairs@ietf.org">idr-chairs@ietf.org</a><br><b>Subject=
:</b> Re: [Idr] Early Code Point allocation for =
draft-ietf-idr-eag-distribution-05 (12/8 to =
12/22)<o:p></o:p></p></div></div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal>WG: =
<o:p></o:p></p><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><p =
class=3DMsoNormal>We&#8217;ve received 7 positive comments for early =
allocation of the draft-ietf-idr-eag-distribution-05.txt work.&nbsp; =
There were no problems pointed to with the =
draft-ietf-idr-eag-distribution-05.txt specification. &nbsp;&nbsp;The WG =
chairs usually like a few more positive comments, but the December time =
period (12/8 to 12/22) may have reduced the number of comments. &nbsp;We =
received no substantial number of comments after the first week. =
<o:p></o:p></p><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><p =
class=3DMsoNormal>Cisco has completed an implementation and is looking =
for an interoperability test prior to shipping code. The work has =
implementations that need the early allocation, a stable specification, =
and these positive comments on the list. &nbsp;I&#8217;ve received =
several comments requesting the processing of this call.&nbsp; Based on =
the WG continued request to get implementations early allocation of code =
points, I&#8217;m going to declare WG consensus on allocating these code =
points. &nbsp;I will forward this early allocation request to Alvaro =
Retana for processing. <o:p></o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal>I think this =
points to the fact that we should go to single week early allocation =
request. &nbsp;&nbsp;The drafts either succeed or fail on the first =
week&#8217;s work. <o:p></o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal>Sue =
Hares<o:p></o:p></p><p class=3DMsoNormal>WG Co-chair <o:p></o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal>PS - I think =
this points to the fact that we should go to single week early =
allocation request. &nbsp;&nbsp;The drafts either succeed or fail on the =
first week&#8217;s work.&nbsp;&nbsp; John and I are always looking for =
feedback to determine if we are following the wishes of the IDR WG in =
getting this early allocations.&nbsp; &nbsp;&nbsp;<o:p></o:p></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span =
style=3D'font-size:24.0pt;font-family:"Times New =
Roman","serif";color:black'><o:p>&nbsp;</o:p></span></b></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p></div></div></body></html>
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Dear idr WG:

This draft has been through the WG and IESG process and it is waiting final
approval for publication.

During the process some changes have been made, some of them significant
enough that I want to call out for your attention.  Please take a look at
the latest version, specifically the updated text related to multiple
prefixes/paths in sections 4.1 and 4.2.  For your convenience, I think that
the diff between -14 and -16 provides the clearest view:

https://www.ietf.org/rfcdiff?url1=3Ddraft-ietf-idr-bgp-prefix-sid-14&url2=
=3Ddraft-ietf-idr-bgp-prefix-sid-16


I think the changes are fine and that they don=E2=80=99t require the docume=
nt
returning to the WG.  But I just want to give you the opportunity to look
at them just in case.  If anyone has concerns, please reply to this
message.  I plan on approving the document for publication by the end of
next week (Feb/23).

Thanks!

Alvaro.

On February 13, 2018 at 10:31:47 PM, internet-drafts@ietf.org (
internet-drafts@ietf.org) wrote:


A New Internet-Draft is available from the on-line Internet-Drafts
directories.
This draft is a work item of the Inter-Domain Routing WG of the IETF.

Title : Segment Routing Prefix SID extensions for BGP
Authors : Stefano Previdi
Clarence Filsfils
Acee Lindem
Arjun Sreekantiah
Hannes Gredler
Filename : draft-ietf-idr-bgp-prefix-sid-16.txt
Pages : 19
Date : 2018-02-13

Abstract:
The Segment Routing (SR) architecture allows a node to steer a packet
flow through any topological path and service chain by leveraging
source routing. The ingress node prepends an SR header to a packet
containing a set of segment identifiers (SID). Each SID represents a
topological or a service-based instruction. Per-flow state is
maintained only on the ingress node of the SR domain.

This document defines an optional, transitive BGP attribute for
announcing BGP Prefix Segment Identifiers (BGP Prefix-SID)
information.



The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-idr-bgp-prefix-sid/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-idr-bgp-prefix-sid-16
https://datatracker.ietf.org/doc/html/draft-ietf-idr-bgp-prefix-sid-16

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-idr-bgp-prefix-sid-16


Please note that it may take a couple of minutes from the time of
submission
until the htmlized version and diff are available at tools.ietf.org.

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/

_______________________________________________
I-D-Announce mailing list
I-D-Announce@ietf.org
https://www.ietf.org/mailman/listinfo/i-d-announce
Internet-Draft directories: http://www.ietf.org/shadow.html
or ftp://ftp.ietf.org/ietf/1shadow-sites.txt

--001a113d735ae76e15056540534d
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<html><head><style>body{font-family:Helvetica,Arial;font-size:13px}</style>=
</head><body style=3D"word-wrap:break-word"><div id=3D"bloop_customfont" st=
yle=3D"font-family:Helvetica,Arial;font-size:13px;color:rgba(0,0,0,1.0);mar=
gin:0px;line-height:auto">Dear idr WG:</div><div id=3D"bloop_customfont" st=
yle=3D"font-family:Helvetica,Arial;font-size:13px;color:rgba(0,0,0,1.0);mar=
gin:0px;line-height:auto"><br></div><div id=3D"bloop_customfont" style=3D"f=
ont-family:Helvetica,Arial;font-size:13px;color:rgba(0,0,0,1.0);margin:0px;=
line-height:auto">This draft has been through the WG and IESG process and i=
t is waiting final approval for publication.</div><div id=3D"bloop_customfo=
nt" style=3D"font-family:Helvetica,Arial;font-size:13px;color:rgba(0,0,0,1.=
0);margin:0px;line-height:auto"><br></div><div id=3D"bloop_customfont" styl=
e=3D"font-family:Helvetica,Arial;font-size:13px;color:rgba(0,0,0,1.0);margi=
n:0px;line-height:auto">During the process some changes have been made, som=
e of them significant enough that I want to call out for your attention.=C2=
=A0 Please take a look at the latest version, specifically the updated text=
 related to multiple prefixes/paths in sections 4.1 and 4.2.=C2=A0 For your=
 convenience, I think that the diff between -14 and -16 provides the cleare=
st view:</div><div id=3D"bloop_customfont" style=3D"font-family:Helvetica,A=
rial;font-size:13px;color:rgba(0,0,0,1.0);margin:0px;line-height:auto"><br>=
</div><div id=3D"bloop_customfont" style=3D"margin:0px"><a href=3D"https://=
www.ietf.org/rfcdiff?url1=3Ddraft-ietf-idr-bgp-prefix-sid-14&amp;url2=3Ddra=
ft-ietf-idr-bgp-prefix-sid-16">https://www.ietf.org/rfcdiff?url1=3Ddraft-ie=
tf-idr-bgp-prefix-sid-14&amp;url2=3Ddraft-ietf-idr-bgp-prefix-sid-16</a>=C2=
=A0</div><div id=3D"bloop_customfont" style=3D"margin:0px"><br></div><div i=
d=3D"bloop_customfont" style=3D"margin:0px">I think the changes are fine an=
d that they don=E2=80=99t require the document returning to the WG.=C2=A0 B=
ut I just want to give you the opportunity to look at them just in case.=C2=
=A0 If anyone has concerns, please reply to this message.=C2=A0 I plan on a=
pproving the document for publication by the end of next week (Feb/23).</di=
v><div id=3D"bloop_customfont" style=3D"margin:0px"><br></div><div id=3D"bl=
oop_customfont" style=3D"margin:0px">Thanks!</div><div id=3D"bloop_customfo=
nt" style=3D"margin:0px"><br></div><div id=3D"bloop_customfont" style=3D"ma=
rgin:0px">Alvaro.</div> <br><p class=3D"airmail_on">On February 13, 2018 at=
 10:31:47 PM, <a href=3D"mailto:internet-drafts@ietf.org">internet-drafts@i=
etf.org</a> (<a href=3D"mailto:internet-drafts@ietf.org">internet-drafts@ie=
tf.org</a>) wrote:</p> <blockquote type=3D"cite" class=3D"clean_bq"><span><=
div><div></div><div>
<br>A New Internet-Draft is available from the on-line Internet-Drafts dire=
ctories.
<br>This draft is a work item of the Inter-Domain Routing WG of the IETF.
<br>
<br>        Title           : Segment Routing Prefix SID extensions for BGP
<br>        Authors         : Stefano Previdi
<br>                          Clarence Filsfils
<br>                          Acee Lindem
<br>                          Arjun Sreekantiah
<br>                          Hannes Gredler
<br>	Filename        : draft-ietf-idr-bgp-prefix-sid-16.txt
<br>	Pages           : 19
<br>	Date            : 2018-02-13
<br>
<br>Abstract:
<br>   The Segment Routing (SR) architecture allows a node to steer a packe=
t
<br>   flow through any topological path and service chain by leveraging
<br>   source routing.  The ingress node prepends an SR header to a packet
<br>   containing a set of segment identifiers (SID).  Each SID represents =
a
<br>   topological or a service-based instruction.  Per-flow state is
<br>   maintained only on the ingress node of the SR domain.
<br>
<br>   This document defines an optional, transitive BGP attribute for
<br>   announcing BGP Prefix Segment Identifiers (BGP Prefix-SID)
<br>   information.
<br>
<br>
<br>
<br>The IETF datatracker status page for this draft is:
<br><a href=3D"https://datatracker.ietf.org/doc/draft-ietf-idr-bgp-prefix-s=
id/">https://datatracker.ietf.org/doc/draft-ietf-idr-bgp-prefix-sid/</a>
<br>
<br>There are also htmlized versions available at:
<br><a href=3D"https://tools.ietf.org/html/draft-ietf-idr-bgp-prefix-sid-16=
">https://tools.ietf.org/html/draft-ietf-idr-bgp-prefix-sid-16</a>
<br><a href=3D"https://datatracker.ietf.org/doc/html/draft-ietf-idr-bgp-pre=
fix-sid-16">https://datatracker.ietf.org/doc/html/draft-ietf-idr-bgp-prefix=
-sid-16</a>
<br>
<br>A diff from the previous version is available at:
<br><a href=3D"https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-idr-bgp-prefi=
x-sid-16">https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-idr-bgp-prefix-sid=
-16</a>
<br>
<br>
<br>Please note that it may take a couple of minutes from the time of submi=
ssion
<br>until the htmlized version and diff are available at <a href=3D"http://=
tools.ietf.org">tools.ietf.org</a>.
<br>
<br>Internet-Drafts are also available by anonymous FTP at:
<br><a href=3D"ftp://ftp.ietf.org/internet-drafts/">ftp://ftp.ietf.org/inte=
rnet-drafts/</a>
<br>
<br>_______________________________________________
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<br></div></div></span></blockquote> <div id=3D"bloop_sign_1518701348549694=
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From: PVLR Pavana Murthy <pvlrpm@gmail.com>
Date: Thu, 15 Feb 2018 20:05:08 +0530
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Subject: [Idr] Use of 'not' & 'm' bits in BGP flowspec components of type [op, bitmask] (RFC 5575)
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--f403045cf65076aa8105654122ea
Content-Type: text/plain; charset="UTF-8"

Hello,
   The following is given in the RFC.

  0   1   2   3   4   5   6   7
+---+---+---+---+---+---+---+---+
| e | a |   len | 0 | 0 |not| m |
+---+---+---+---+---+---+---+---+

not - NOT bit. If set, logical negation of operation.

m - Match bit. If set, this is a bitwise match operation
defined as "(data & value) == value"; if unset, (data &
value) evaluates to TRUE if any of the bits in the value
mask are set in the data.


I will try to use all the combinations of 'not' and 'm' bits. Please let me
know if the following my understanding is correct.

I will try to use the mask with SYN, ACK bits of TCP header for this.
[CWR ECE URG ACK PSH RST SYN FIN]
mask = 0x12


   1. not-0, m-0  (data & mask) != 0 i.e. either SYN or ACK bits should
   have been set in TCP header.
   2. not-0, m-1  (data & mask)  == mask i.e. SYN and ACK bits both should
   be set in TCP header.
   3. not-1,m-0   (data & mask) == 0    i.e. both SYN and  ACK bits should
   not  be set in TCP header.
   4. not-1, m-1  (data & mask) != mask i.e. at least one of  SYN or ACK
   bits should not be set in TCP header.


Thanks,
Pavana.

--f403045cf65076aa8105654122ea
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><font face=3D"verdana, sans-serif">Hello,</font><div><font=
 face=3D"verdana, sans-serif">=C2=A0 =C2=A0The following is given in the RF=
C</font>.=C2=A0</div><div><br></div><div><div><font face=3D"monospace, mono=
space">=C2=A0 0=C2=A0 =C2=A01=C2=A0 =C2=A02=C2=A0 =C2=A03=C2=A0 =C2=A04=C2=
=A0 =C2=A05=C2=A0 =C2=A06=C2=A0 =C2=A07</font></div><div><font face=3D"mono=
space, monospace">+---+---+---+---+---+---+---+---+</font></div><div><font =
face=3D"monospace, monospace">| e | a |=C2=A0 =C2=A0len | 0 | 0 |not| m |</=
font></div><div><font face=3D"monospace, monospace">+---+---+---+---+---+--=
-+---+---+</font></div><div><br></div><div><font face=3D"monospace, monospa=
ce">not - NOT bit. If set, logical negation of operation.</font></div><div>=
<font face=3D"monospace, monospace"><br></font></div><div><font face=3D"mon=
ospace, monospace">m - Match bit. If set, this is a bitwise match operation=
</font></div><div><font face=3D"monospace, monospace">defined as &quot;(dat=
a &amp; value) =3D=3D value&quot;; if unset, (data &amp;</font></div><div><=
font face=3D"monospace, monospace">value) evaluates to TRUE if any of the b=
its in the value</font></div><div><font face=3D"monospace, monospace">mask =
are set in the data.</font></div><div><br></div></div><div><font face=3D"ve=
rdana, sans-serif"><br></font></div><div><font face=3D"verdana, sans-serif"=
>I will try to use all the combinations of &#39;not&#39; and &#39;m&#39; bi=
ts. Please let me know if the following my understanding is correct.=C2=A0<=
/font></div><div><font face=3D"verdana, sans-serif"><br></font></div><div><=
font face=3D"verdana, sans-serif">I will try to use the mask with SYN, ACK =
bits of TCP header for this.</font></div><div><font face=3D"verdana, sans-s=
erif">[CWR ECE URG ACK PSH RST SYN FIN]<br></font></div><div><font face=3D"=
verdana, sans-serif">mask =3D 0x12</font></div><div><font face=3D"monospace=
, monospace"><br></font></div><div><ol><li><font face=3D"verdana, sans-seri=
f">not-0, m-0=C2=A0 (data &amp; mask) !=3D 0 i.e. either SYN or ACK bits sh=
ould have been set in TCP header.</font></li><li><font face=3D"verdana, san=
s-serif">not-0, m-1=C2=A0 (data &amp; mask)=C2=A0 =3D=3D mask i.e. SYN and =
ACK bits both should be set in TCP header.</font></li><li><font face=3D"ver=
dana, sans-serif">not-1,m-0=C2=A0 =C2=A0(data &amp; mask) =3D=3D 0=C2=A0 =
=C2=A0 i.e. both SYN and=C2=A0 ACK bits should not=C2=A0 be set in TCP head=
er.</font></li><li><font face=3D"verdana, sans-serif">not-1, m-1=C2=A0 (dat=
a &amp; mask) !=3D mask i.e. at least one of=C2=A0 SYN or ACK bits should n=
ot be set in TCP header.</font></li></ol><div><br></div></div><div><font fa=
ce=3D"verdana, sans-serif">Thanks,</font></div><div><font face=3D"verdana, =
sans-serif">Pavana.</font></div><div><font face=3D"monospace, monospace">=
=C2=A0</font></div><div><font face=3D"monospace, monospace"><br></font></di=
v></div>

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Archived-At: <https://mailarchive.ietf.org/arch/msg/idr/3LXnvH-10NaSG0xS1sx4gvoFgTk>
Subject: Re: [Idr] Review Updates to draft-ietf-idr-bgp-prefix-sid
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I note that the document still has the following text:

"a BGP speaker receiving a prefix with a BGP Prefix-SID attribute and a 
label NLRI field of Implicit NULL"

Am I the only one who doesn't know what the numeric value of "a label 
NLRI field of Implicit NULL" is?  There does not appear to be a 
definition of the numeric value of  "Implicit NULL" in RFC 8277, which 
is the only relevant item in the normative references.  Is a reference 
to RFC 3032 Section 2.1 required?


On 2/15/2018 8:37 AM, Alvaro Retana wrote:
> Dear idr WG:
>
> This draft has been through the WG and IESG process and it is waiting 
> final approval for publication.
>
> During the process some changes have been made, some of them 
> significant enough that I want to call out for your attention. Please 
> take a look at the latest version, specifically the updated text 
> related to multiple prefixes/paths in sections 4.1 and 4.2.  For your 
> convenience, I think that the diff between -14 and -16 provides the 
> clearest view:
>
> https://www.ietf.org/rfcdiff?url1=draft-ietf-idr-bgp-prefix-sid-14&url2=draft-ietf-idr-bgp-prefix-sid-16 
> <https://urldefense.proofpoint.com/v2/url?u=https-3A__www.ietf.org_rfcdiff-3Furl1-3Ddraft-2Dietf-2Didr-2Dbgp-2Dprefix-2Dsid-2D14-26url2-3Ddraft-2Dietf-2Didr-2Dbgp-2Dprefix-2Dsid-2D16&d=DwMFaQ&c=HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=-DXB84eU9m4cIlq2OOcCJCQQAwJXQQswyu3F0kG0VNo&m=yF0495B-NVp5DIlASsUbsM45SPzz8uoC8OecJguM3vA&s=o2an32VlUxyFhi7bKueRpn-9Nnv_ixMZmg44gSvPndA&e=> 
>
>
> I think the changes are fine and that they don’t require the document 
> returning to the WG.  But I just want to give you the opportunity to 
> look at them just in case.  If anyone has concerns, please reply to 
> this message.  I plan on approving the document for publication by the 
> end of next week (Feb/23).
>
> Thanks!
>
> Alvaro.
>
> On February 13, 2018 at 10:31:47 PM, internet-drafts@ietf.org 
> <mailto:internet-drafts@ietf.org> (internet-drafts@ietf.org 
> <mailto:internet-drafts@ietf.org>) wrote:
>
>>
>> A New Internet-Draft is available from the on-line Internet-Drafts 
>> directories.
>> This draft is a work item of the Inter-Domain Routing WG of the IETF.
>>
>> Title : Segment Routing Prefix SID extensions for BGP
>> Authors : Stefano Previdi
>> Clarence Filsfils
>> Acee Lindem
>> Arjun Sreekantiah
>> Hannes Gredler
>> Filename : draft-ietf-idr-bgp-prefix-sid-16.txt
>> Pages : 19
>> Date : 2018-02-13
>>
>> Abstract:
>> The Segment Routing (SR) architecture allows a node to steer a packet
>> flow through any topological path and service chain by leveraging
>> source routing. The ingress node prepends an SR header to a packet
>> containing a set of segment identifiers (SID). Each SID represents a
>> topological or a service-based instruction. Per-flow state is
>> maintained only on the ingress node of the SR domain.
>>
>> This document defines an optional, transitive BGP attribute for
>> announcing BGP Prefix Segment Identifiers (BGP Prefix-SID)
>> information.
>>
>>
>>
>> The IETF datatracker status page for this draft is:
>> https://datatracker.ietf.org/doc/draft-ietf-idr-bgp-prefix-sid/ 
>> <https://urldefense.proofpoint.com/v2/url?u=https-3A__datatracker.ietf.org_doc_draft-2Dietf-2Didr-2Dbgp-2Dprefix-2Dsid_&d=DwMFaQ&c=HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=-DXB84eU9m4cIlq2OOcCJCQQAwJXQQswyu3F0kG0VNo&m=yF0495B-NVp5DIlASsUbsM45SPzz8uoC8OecJguM3vA&s=N0tgIIQyJcbiz8sY8xJGqoiz9XY0NgyZ4b2MCWOxPHU&e=> 
>>
>>
>> There are also htmlized versions available at:
>> https://tools.ietf.org/html/draft-ietf-idr-bgp-prefix-sid-16 
>> <https://urldefense.proofpoint.com/v2/url?u=https-3A__tools.ietf.org_html_draft-2Dietf-2Didr-2Dbgp-2Dprefix-2Dsid-2D16&d=DwMFaQ&c=HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=-DXB84eU9m4cIlq2OOcCJCQQAwJXQQswyu3F0kG0VNo&m=yF0495B-NVp5DIlASsUbsM45SPzz8uoC8OecJguM3vA&s=wwl2a9XgSSGYQmBMLUyjioJyIjaResJU63tV8Lh0oPw&e=> 
>>
>> https://datatracker.ietf.org/doc/html/draft-ietf-idr-bgp-prefix-sid-16 
>> <https://urldefense.proofpoint.com/v2/url?u=https-3A__datatracker.ietf.org_doc_html_draft-2Dietf-2Didr-2Dbgp-2Dprefix-2Dsid-2D16&d=DwMFaQ&c=HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=-DXB84eU9m4cIlq2OOcCJCQQAwJXQQswyu3F0kG0VNo&m=yF0495B-NVp5DIlASsUbsM45SPzz8uoC8OecJguM3vA&s=_PKFP2HU-RTOgNjv3cQOhwYyuwh5P5aOJa6mVSQzeCo&e=> 
>>
>>
>> A diff from the previous version is available at:
>> https://www.ietf.org/rfcdiff?url2=draft-ietf-idr-bgp-prefix-sid-16 
>> <https://urldefense.proofpoint.com/v2/url?u=https-3A__www.ietf.org_rfcdiff-3Furl2-3Ddraft-2Dietf-2Didr-2Dbgp-2Dprefix-2Dsid-2D16&d=DwMFaQ&c=HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=-DXB84eU9m4cIlq2OOcCJCQQAwJXQQswyu3F0kG0VNo&m=yF0495B-NVp5DIlASsUbsM45SPzz8uoC8OecJguM3vA&s=7Ss6_8lzJDl0U3F8b4M9edpF1XG9JtyoZsQT_UModj0&e=> 
>>
>>
>>
>> Please note that it may take a couple of minutes from the time of 
>> submission
>> until the htmlized version and diff are available at tools.ietf.org 
>> <https://urldefense.proofpoint.com/v2/url?u=http-3A__tools.ietf.org&d=DwMFaQ&c=HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=-DXB84eU9m4cIlq2OOcCJCQQAwJXQQswyu3F0kG0VNo&m=yF0495B-NVp5DIlASsUbsM45SPzz8uoC8OecJguM3vA&s=IsdTJ6aSeBNSSLkVINQYQNQkfE9P-u1y5XX5UWwn_Mc&e=>. 
>>
>>
>> Internet-Drafts are also available by anonymous FTP at:
>> ftp://ftp.ietf.org/internet-drafts/ 
>> <https://urldefense.proofpoint.com/v2/url?u=ftp-3A__ftp.ietf.org_internet-2Ddrafts_&d=DwMFaQ&c=HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=-DXB84eU9m4cIlq2OOcCJCQQAwJXQQswyu3F0kG0VNo&m=yF0495B-NVp5DIlASsUbsM45SPzz8uoC8OecJguM3vA&s=nTLjy0PEOtD6YPTrGm-XSaWEAWSxs_Tt4Wy7Bj2QzUo&e=> 
>>
>>
>> _______________________________________________
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>> https://www.ietf.org/mailman/listinfo/i-d-announce 
>> <https://urldefense.proofpoint.com/v2/url?u=https-3A__www.ietf.org_mailman_listinfo_i-2Dd-2Dannounce&d=DwMFaQ&c=HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=-DXB84eU9m4cIlq2OOcCJCQQAwJXQQswyu3F0kG0VNo&m=yF0495B-NVp5DIlASsUbsM45SPzz8uoC8OecJguM3vA&s=ov1NLTv8StMXZBSroef794vxZBfq-prK4hAHyagtjEA&e=> 
>>
>> Internet-Draft directories: http://www.ietf.org/shadow.html 
>> <https://urldefense.proofpoint.com/v2/url?u=http-3A__www.ietf.org_shadow.html&d=DwMFaQ&c=HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=-DXB84eU9m4cIlq2OOcCJCQQAwJXQQswyu3F0kG0VNo&m=yF0495B-NVp5DIlASsUbsM45SPzz8uoC8OecJguM3vA&s=d7rR32qUs_sytae8S7msinAcVI7aDCB9yocrL2B8YkU&e=> 
>>
>> or ftp://ftp.ietf.org/ietf/1shadow-sites.txt 
>> <https://urldefense.proofpoint.com/v2/url?u=ftp-3A__ftp.ietf.org_ietf_1shadow-2Dsites.txt&d=DwMFaQ&c=HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=-DXB84eU9m4cIlq2OOcCJCQQAwJXQQswyu3F0kG0VNo&m=yF0495B-NVp5DIlASsUbsM45SPzz8uoC8OecJguM3vA&s=MRB2kIaIcnJ0jVfRmVl4puiURIx9GFD_qwYk4i48Pow&e=> 
>>
>
>
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    <font size="-1">I note that the document still has the following
      text:</font><br>
    <br>
    "a BGP speaker receiving a prefix with a BGP Prefix-SID attribute
    and a label NLRI field of Implicit NULL"<br>
    <br>
    <font size="-1">Am I the only one who doesn't know what the numeric
      value of "a label NLRI field of Implicit NULL" is?  There does not
      appear to be a definition of the numeric value of  "Implicit NULL"
      in RFC 8277, which is the only relevant item in the normative
      references.  Is a reference to RFC 3032 Section 2.1 required?</font><br>
    <br>
    <br>
    <div class="moz-cite-prefix">On 2/15/2018 8:37 AM, Alvaro Retana
      wrote:<br>
    </div>
    <blockquote type="cite"
cite="mid:CAMMESszyqjqm+m3J00GWG1Dw0OjYdo-GGXePxcWvyBp4sgtm6Q@mail.gmail.com">
      <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
      <style>body{font-family:Helvetica,Arial;font-size:13px}</style>
      <div id="bloop_customfont"
style="font-family:Helvetica,Arial;font-size:13px;color:rgba(0,0,0,1.0);margin:0px;line-height:auto">Dear
        idr WG:</div>
      <div id="bloop_customfont"
style="font-family:Helvetica,Arial;font-size:13px;color:rgba(0,0,0,1.0);margin:0px;line-height:auto"><br>
      </div>
      <div id="bloop_customfont"
style="font-family:Helvetica,Arial;font-size:13px;color:rgba(0,0,0,1.0);margin:0px;line-height:auto">This
        draft has been through the WG and IESG process and it is waiting
        final approval for publication.</div>
      <div id="bloop_customfont"
style="font-family:Helvetica,Arial;font-size:13px;color:rgba(0,0,0,1.0);margin:0px;line-height:auto"><br>
      </div>
      <div id="bloop_customfont"
style="font-family:Helvetica,Arial;font-size:13px;color:rgba(0,0,0,1.0);margin:0px;line-height:auto">During
        the process some changes have been made, some of them
        significant enough that I want to call out for your attention. 
        Please take a look at the latest version, specifically the
        updated text related to multiple prefixes/paths in sections 4.1
        and 4.2.  For your convenience, I think that the diff between
        -14 and -16 provides the clearest view:</div>
      <div id="bloop_customfont"
style="font-family:Helvetica,Arial;font-size:13px;color:rgba(0,0,0,1.0);margin:0px;line-height:auto"><br>
      </div>
      <div id="bloop_customfont" style="margin:0px"><a
href="https://urldefense.proofpoint.com/v2/url?u=https-3A__www.ietf.org_rfcdiff-3Furl1-3Ddraft-2Dietf-2Didr-2Dbgp-2Dprefix-2Dsid-2D14-26url2-3Ddraft-2Dietf-2Didr-2Dbgp-2Dprefix-2Dsid-2D16&amp;d=DwMFaQ&amp;c=HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&amp;r=-DXB84eU9m4cIlq2OOcCJCQQAwJXQQswyu3F0kG0VNo&amp;m=yF0495B-NVp5DIlASsUbsM45SPzz8uoC8OecJguM3vA&amp;s=o2an32VlUxyFhi7bKueRpn-9Nnv_ixMZmg44gSvPndA&amp;e="
          moz-do-not-send="true">https://www.ietf.org/rfcdiff?url1=draft-ietf-idr-bgp-prefix-sid-14&amp;url2=draft-ietf-idr-bgp-prefix-sid-16</a> </div>
      <div id="bloop_customfont" style="margin:0px"><br>
      </div>
      <div id="bloop_customfont" style="margin:0px">I think the changes
        are fine and that they don’t require the document returning to
        the WG.  But I just want to give you the opportunity to look at
        them just in case.  If anyone has concerns, please reply to this
        message.  I plan on approving the document for publication by
        the end of next week (Feb/23).</div>
      <div id="bloop_customfont" style="margin:0px"><br>
      </div>
      <div id="bloop_customfont" style="margin:0px">Thanks!</div>
      <div id="bloop_customfont" style="margin:0px"><br>
      </div>
      <div id="bloop_customfont" style="margin:0px">Alvaro.</div>
      <br>
      <p class="airmail_on">On February 13, 2018 at 10:31:47 PM, <a
          href="mailto:internet-drafts@ietf.org" moz-do-not-send="true">internet-drafts@ietf.org</a>
        (<a href="mailto:internet-drafts@ietf.org"
          moz-do-not-send="true">internet-drafts@ietf.org</a>) wrote:</p>
      <blockquote type="cite" class="clean_bq"><span>
          <div>
            <div>
              <br>
              A New Internet-Draft is available from the on-line
              Internet-Drafts directories.
              <br>
              This draft is a work item of the Inter-Domain Routing WG
              of the IETF.
              <br>
              <br>
              Title : Segment Routing Prefix SID extensions for BGP
              <br>
              Authors : Stefano Previdi
              <br>
              Clarence Filsfils
              <br>
              Acee Lindem
              <br>
              Arjun Sreekantiah
              <br>
              Hannes Gredler
              <br>
              Filename : draft-ietf-idr-bgp-prefix-sid-16.txt
              <br>
              Pages : 19
              <br>
              Date : 2018-02-13
              <br>
              <br>
              Abstract:
              <br>
              The Segment Routing (SR) architecture allows a node to
              steer a packet
              <br>
              flow through any topological path and service chain by
              leveraging
              <br>
              source routing. The ingress node prepends an SR header to
              a packet
              <br>
              containing a set of segment identifiers (SID). Each SID
              represents a
              <br>
              topological or a service-based instruction. Per-flow state
              is
              <br>
              maintained only on the ingress node of the SR domain.
              <br>
              <br>
              This document defines an optional, transitive BGP
              attribute for
              <br>
              announcing BGP Prefix Segment Identifiers (BGP Prefix-SID)
              <br>
              information.
              <br>
              <br>
              <br>
              <br>
              The IETF datatracker status page for this draft is:
              <br>
              <a
href="https://urldefense.proofpoint.com/v2/url?u=https-3A__datatracker.ietf.org_doc_draft-2Dietf-2Didr-2Dbgp-2Dprefix-2Dsid_&amp;d=DwMFaQ&amp;c=HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&amp;r=-DXB84eU9m4cIlq2OOcCJCQQAwJXQQswyu3F0kG0VNo&amp;m=yF0495B-NVp5DIlASsUbsM45SPzz8uoC8OecJguM3vA&amp;s=N0tgIIQyJcbiz8sY8xJGqoiz9XY0NgyZ4b2MCWOxPHU&amp;e="
                moz-do-not-send="true">https://datatracker.ietf.org/doc/draft-ietf-idr-bgp-prefix-sid/</a>
              <br>
              <br>
              There are also htmlized versions available at:
              <br>
              <a
href="https://urldefense.proofpoint.com/v2/url?u=https-3A__tools.ietf.org_html_draft-2Dietf-2Didr-2Dbgp-2Dprefix-2Dsid-2D16&amp;d=DwMFaQ&amp;c=HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&amp;r=-DXB84eU9m4cIlq2OOcCJCQQAwJXQQswyu3F0kG0VNo&amp;m=yF0495B-NVp5DIlASsUbsM45SPzz8uoC8OecJguM3vA&amp;s=wwl2a9XgSSGYQmBMLUyjioJyIjaResJU63tV8Lh0oPw&amp;e="
                moz-do-not-send="true">https://tools.ietf.org/html/draft-ietf-idr-bgp-prefix-sid-16</a>
              <br>
              <a
href="https://urldefense.proofpoint.com/v2/url?u=https-3A__datatracker.ietf.org_doc_html_draft-2Dietf-2Didr-2Dbgp-2Dprefix-2Dsid-2D16&amp;d=DwMFaQ&amp;c=HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&amp;r=-DXB84eU9m4cIlq2OOcCJCQQAwJXQQswyu3F0kG0VNo&amp;m=yF0495B-NVp5DIlASsUbsM45SPzz8uoC8OecJguM3vA&amp;s=_PKFP2HU-RTOgNjv3cQOhwYyuwh5P5aOJa6mVSQzeCo&amp;e="
                moz-do-not-send="true">https://datatracker.ietf.org/doc/html/draft-ietf-idr-bgp-prefix-sid-16</a>
              <br>
              <br>
              A diff from the previous version is available at:
              <br>
              <a
href="https://urldefense.proofpoint.com/v2/url?u=https-3A__www.ietf.org_rfcdiff-3Furl2-3Ddraft-2Dietf-2Didr-2Dbgp-2Dprefix-2Dsid-2D16&amp;d=DwMFaQ&amp;c=HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&amp;r=-DXB84eU9m4cIlq2OOcCJCQQAwJXQQswyu3F0kG0VNo&amp;m=yF0495B-NVp5DIlASsUbsM45SPzz8uoC8OecJguM3vA&amp;s=7Ss6_8lzJDl0U3F8b4M9edpF1XG9JtyoZsQT_UModj0&amp;e="
                moz-do-not-send="true">https://www.ietf.org/rfcdiff?url2=draft-ietf-idr-bgp-prefix-sid-16</a>
              <br>
              <br>
              <br>
              Please note that it may take a couple of minutes from the
              time of submission
              <br>
              until the htmlized version and diff are available at <a
href="https://urldefense.proofpoint.com/v2/url?u=http-3A__tools.ietf.org&amp;d=DwMFaQ&amp;c=HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&amp;r=-DXB84eU9m4cIlq2OOcCJCQQAwJXQQswyu3F0kG0VNo&amp;m=yF0495B-NVp5DIlASsUbsM45SPzz8uoC8OecJguM3vA&amp;s=IsdTJ6aSeBNSSLkVINQYQNQkfE9P-u1y5XX5UWwn_Mc&amp;e="
                moz-do-not-send="true">tools.ietf.org</a>.
              <br>
              <br>
              Internet-Drafts are also available by anonymous FTP at:
              <br>
              <a
href="https://urldefense.proofpoint.com/v2/url?u=ftp-3A__ftp.ietf.org_internet-2Ddrafts_&amp;d=DwMFaQ&amp;c=HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&amp;r=-DXB84eU9m4cIlq2OOcCJCQQAwJXQQswyu3F0kG0VNo&amp;m=yF0495B-NVp5DIlASsUbsM45SPzz8uoC8OecJguM3vA&amp;s=nTLjy0PEOtD6YPTrGm-XSaWEAWSxs_Tt4Wy7Bj2QzUo&amp;e="
                moz-do-not-send="true">ftp://ftp.ietf.org/internet-drafts/</a>
              <br>
              <br>
              _______________________________________________
              <br>
              I-D-Announce mailing list
              <br>
              <a href="mailto:I-D-Announce@ietf.org"
                moz-do-not-send="true">I-D-Announce@ietf.org</a>
              <br>
              <a
href="https://urldefense.proofpoint.com/v2/url?u=https-3A__www.ietf.org_mailman_listinfo_i-2Dd-2Dannounce&amp;d=DwMFaQ&amp;c=HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&amp;r=-DXB84eU9m4cIlq2OOcCJCQQAwJXQQswyu3F0kG0VNo&amp;m=yF0495B-NVp5DIlASsUbsM45SPzz8uoC8OecJguM3vA&amp;s=ov1NLTv8StMXZBSroef794vxZBfq-prK4hAHyagtjEA&amp;e="
                moz-do-not-send="true">https://www.ietf.org/mailman/listinfo/i-d-announce</a>
              <br>
              Internet-Draft directories: <a
href="https://urldefense.proofpoint.com/v2/url?u=http-3A__www.ietf.org_shadow.html&amp;d=DwMFaQ&amp;c=HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&amp;r=-DXB84eU9m4cIlq2OOcCJCQQAwJXQQswyu3F0kG0VNo&amp;m=yF0495B-NVp5DIlASsUbsM45SPzz8uoC8OecJguM3vA&amp;s=d7rR32qUs_sytae8S7msinAcVI7aDCB9yocrL2B8YkU&amp;e="
                moz-do-not-send="true">http://www.ietf.org/shadow.html</a>
              <br>
              or <a
href="https://urldefense.proofpoint.com/v2/url?u=ftp-3A__ftp.ietf.org_ietf_1shadow-2Dsites.txt&amp;d=DwMFaQ&amp;c=HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&amp;r=-DXB84eU9m4cIlq2OOcCJCQQAwJXQQswyu3F0kG0VNo&amp;m=yF0495B-NVp5DIlASsUbsM45SPzz8uoC8OecJguM3vA&amp;s=MRB2kIaIcnJ0jVfRmVl4puiURIx9GFD_qwYk4i48Pow&amp;e="
                moz-do-not-send="true">ftp://ftp.ietf.org/ietf/1shadow-sites.txt</a>
              <br>
            </div>
          </div>
        </span></blockquote>
      <br>
      <fieldset class="mimeAttachmentHeader"></fieldset>
      <br>
      <pre wrap="">_______________________________________________
Idr mailing list
<a class="moz-txt-link-abbreviated" href="mailto:Idr@ietf.org">Idr@ietf.org</a>
<a class="moz-txt-link-freetext" href="https://urldefense.proofpoint.com/v2/url?u=https-3A__www.ietf.org_mailman_listinfo_idr&amp;d=DwICAg&amp;c=HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&amp;r=-DXB84eU9m4cIlq2OOcCJCQQAwJXQQswyu3F0kG0VNo&amp;m=yF0495B-NVp5DIlASsUbsM45SPzz8uoC8OecJguM3vA&amp;s=BzTPrKQqOu71SaROHiK_7IeUpNHd2pDnQ11o3H5_ChE&amp;e=">https://urldefense.proofpoint.com/v2/url?u=https-3A__www.ietf.org_mailman_listinfo_idr&amp;d=DwICAg&amp;c=HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&amp;r=-DXB84eU9m4cIlq2OOcCJCQQAwJXQQswyu3F0kG0VNo&amp;m=yF0495B-NVp5DIlASsUbsM45SPzz8uoC8OecJguM3vA&amp;s=BzTPrKQqOu71SaROHiK_7IeUpNHd2pDnQ11o3H5_ChE&amp;e=</a>
</pre>
    </blockquote>
    <br>
  </body>
</html>

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To: Eric C Rosen <erosen@juniper.net>
Cc: Alvaro Retana <aretana.ietf@gmail.com>, idr wg <idr@ietf.org>, idr-chairs@ietf.org,  draft-ietf-idr-bgp-prefix-sid@ietf.org, Susan Hares <shares@ndzh.com>
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Subject: Re: [Idr] Review Updates to draft-ietf-idr-bgp-prefix-sid
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Hi Eric,

Isn't the fact that a value is defined in IANA registry sufficient ?

https://www.iana.org/assignments/mpls-label-values/mpls-label-values.xhtml

Do we have to quote all RFCs which define label values at each subsequent
work ?

Thx,
R.



On Thu, Feb 15, 2018 at 4:07 PM, Eric C Rosen <erosen@juniper.net> wrote:

> I note that the document still has the following text:
>
> "a BGP speaker receiving a prefix with a BGP Prefix-SID attribute and a
> label NLRI field of Implicit NULL"
>
> Am I the only one who doesn't know what the numeric value of "a label NLR=
I
> field of Implicit NULL" is?  There does not appear to be a definition of
> the numeric value of  "Implicit NULL" in RFC 8277, which is the only
> relevant item in the normative references.  Is a reference to RFC 3032
> Section 2.1 required?
>
>
>
> On 2/15/2018 8:37 AM, Alvaro Retana wrote:
>
> Dear idr WG:
>
> This draft has been through the WG and IESG process and it is waiting
> final approval for publication.
>
> During the process some changes have been made, some of them significant
> enough that I want to call out for your attention.  Please take a look at
> the latest version, specifically the updated text related to multiple
> prefixes/paths in sections 4.1 and 4.2.  For your convenience, I think th=
at
> the diff between -14 and -16 provides the clearest view:
>
> https://www.ietf.org/rfcdiff?url1=3Ddraft-ietf-idr-bgp-
> prefix-sid-14&url2=3Ddraft-ietf-idr-bgp-prefix-sid-16
> <https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__www.ietf.org_rfcd=
iff-3Furl1-3Ddraft-2Dietf-2Didr-2Dbgp-2Dprefix-2Dsid-2D14-26url2-3Ddraft-2D=
ietf-2Didr-2Dbgp-2Dprefix-2Dsid-2D16&d=3DDwMFaQ&c=3DHAkYuh63rsuhr6Scbfh0UjB=
XeMK-ndb3voDTXcWzoCI&r=3D-DXB84eU9m4cIlq2OOcCJCQQAwJXQQswyu3F0kG0VNo&m=3DyF=
0495B-NVp5DIlASsUbsM45SPzz8uoC8OecJguM3vA&s=3Do2an32VlUxyFhi7bKueRpn-9Nnv_i=
xMZmg44gSvPndA&e=3D>
>
>
> I think the changes are fine and that they don=E2=80=99t require the docu=
ment
> returning to the WG.  But I just want to give you the opportunity to look
> at them just in case.  If anyone has concerns, please reply to this
> message.  I plan on approving the document for publication by the end of
> next week (Feb/23).
>
> Thanks!
>
> Alvaro.
>
> On February 13, 2018 at 10:31:47 PM, internet-drafts@ietf.org (
> internet-drafts@ietf.org) wrote:
>
>
> A New Internet-Draft is available from the on-line Internet-Drafts
> directories.
> This draft is a work item of the Inter-Domain Routing WG of the IETF.
>
> Title : Segment Routing Prefix SID extensions for BGP
> Authors : Stefano Previdi
> Clarence Filsfils
> Acee Lindem
> Arjun Sreekantiah
> Hannes Gredler
> Filename : draft-ietf-idr-bgp-prefix-sid-16.txt
> Pages : 19
> Date : 2018-02-13
>
> Abstract:
> The Segment Routing (SR) architecture allows a node to steer a packet
> flow through any topological path and service chain by leveraging
> source routing. The ingress node prepends an SR header to a packet
> containing a set of segment identifiers (SID). Each SID represents a
> topological or a service-based instruction. Per-flow state is
> maintained only on the ingress node of the SR domain.
>
> This document defines an optional, transitive BGP attribute for
> announcing BGP Prefix Segment Identifiers (BGP Prefix-SID)
> information.
>
>
>
> The IETF datatracker status page for this draft is:
> https://datatracker.ietf.org/doc/draft-ietf-idr-bgp-prefix-sid/
> <https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__datatracker.ietf.=
org_doc_draft-2Dietf-2Didr-2Dbgp-2Dprefix-2Dsid_&d=3DDwMFaQ&c=3DHAkYuh63rsu=
hr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=3D-DXB84eU9m4cIlq2OOcCJCQQAwJXQQswyu3F0k=
G0VNo&m=3DyF0495B-NVp5DIlASsUbsM45SPzz8uoC8OecJguM3vA&s=3DN0tgIIQyJcbiz8sY8=
xJGqoiz9XY0NgyZ4b2MCWOxPHU&e=3D>
>
> There are also htmlized versions available at:
> https://tools.ietf.org/html/draft-ietf-idr-bgp-prefix-sid-16
> <https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__tools.ietf.org_ht=
ml_draft-2Dietf-2Didr-2Dbgp-2Dprefix-2Dsid-2D16&d=3DDwMFaQ&c=3DHAkYuh63rsuh=
r6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=3D-DXB84eU9m4cIlq2OOcCJCQQAwJXQQswyu3F0kG=
0VNo&m=3DyF0495B-NVp5DIlASsUbsM45SPzz8uoC8OecJguM3vA&s=3Dwwl2a9XgSSGYQmBMLU=
yjioJyIjaResJU63tV8Lh0oPw&e=3D>
> https://datatracker.ietf.org/doc/html/draft-ietf-idr-bgp-prefix-sid-16
> <https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__datatracker.ietf.=
org_doc_html_draft-2Dietf-2Didr-2Dbgp-2Dprefix-2Dsid-2D16&d=3DDwMFaQ&c=3DHA=
kYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=3D-DXB84eU9m4cIlq2OOcCJCQQAwJXQ=
Qswyu3F0kG0VNo&m=3DyF0495B-NVp5DIlASsUbsM45SPzz8uoC8OecJguM3vA&s=3D_PKFP2HU=
-RTOgNjv3cQOhwYyuwh5P5aOJa6mVSQzeCo&e=3D>
>
> A diff from the previous version is available at:
> https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-idr-bgp-prefix-sid-16
> <https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__www.ietf.org_rfcd=
iff-3Furl2-3Ddraft-2Dietf-2Didr-2Dbgp-2Dprefix-2Dsid-2D16&d=3DDwMFaQ&c=3DHA=
kYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=3D-DXB84eU9m4cIlq2OOcCJCQQAwJXQ=
Qswyu3F0kG0VNo&m=3DyF0495B-NVp5DIlASsUbsM45SPzz8uoC8OecJguM3vA&s=3D7Ss6_8lz=
JDl0U3F8b4M9edpF1XG9JtyoZsQT_UModj0&e=3D>
>
>
> Please note that it may take a couple of minutes from the time of
> submission
> until the htmlized version and diff are available at tools.ietf.org
> <https://urldefense.proofpoint.com/v2/url?u=3Dhttp-3A__tools.ietf.org&d=
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lq2OOcCJCQQAwJXQQswyu3F0kG0VNo&m=3DyF0495B-NVp5DIlASsUbsM45SPzz8uoC8OecJguM=
3vA&s=3DIsdTJ6aSeBNSSLkVINQYQNQkfE9P-u1y5XX5UWwn_Mc&e=3D>.
>
>
> Internet-Drafts are also available by anonymous FTP at:
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Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small">Hi Eric,</div><div class=3D"gmail_defau=
lt" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></=
div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-=
serif;font-size:small">Isn&#39;t the fact that a value is defined in IANA r=
egistry sufficient ?=C2=A0</div><div class=3D"gmail_default" style=3D"font-=
family:arial,helvetica,sans-serif;font-size:small"><br></div><div class=3D"=
gmail_default"><font face=3D"arial, helvetica, sans-serif"><a href=3D"https=
://www.iana.org/assignments/mpls-label-values/mpls-label-values.xhtml">http=
s://www.iana.org/assignments/mpls-label-values/mpls-label-values.xhtml</a><=
/font><br></div><div class=3D"gmail_default"><font face=3D"arial, helvetica=
, sans-serif"><br></font></div><div class=3D"gmail_default"><font face=3D"a=
rial, helvetica, sans-serif">Do we have to quote all RFCs which define labe=
l=C2=A0</font><span style=3D"font-family:arial,helvetica,sans-serif">values=
 at each subsequent work ?=C2=A0</span></div><div class=3D"gmail_default"><=
span style=3D"font-family:arial,helvetica,sans-serif"><br></span></div><div=
 class=3D"gmail_default"><span style=3D"font-family:arial,helvetica,sans-se=
rif">Thx,</span></div><div class=3D"gmail_default"><span style=3D"font-fami=
ly:arial,helvetica,sans-serif">R.</span></div><div class=3D"gmail_default">=
<font face=3D"arial, helvetica, sans-serif"><br></font></div><div class=3D"=
gmail_default"><font face=3D"arial, helvetica, sans-serif"><br></font></div=
></div><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">On Thu, Fe=
b 15, 2018 at 4:07 PM, Eric C Rosen <span dir=3D"ltr">&lt;<a href=3D"mailto=
:erosen@juniper.net" target=3D"_blank">erosen@juniper.net</a>&gt;</span> wr=
ote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border=
-left:1px #ccc solid;padding-left:1ex">
 =20
   =20
 =20
  <div text=3D"#000000" bgcolor=3D"#FFFFFF">
    <font size=3D"-1">I note that the document still has the following
      text:</font><br>
    <br>
    &quot;a BGP speaker receiving a prefix with a BGP Prefix-SID attribute
    and a label NLRI field of Implicit NULL&quot;<br>
    <br>
    <font size=3D"-1">Am I the only one who doesn&#39;t know what the numer=
ic
      value of &quot;a label NLRI field of Implicit NULL&quot; is?=C2=A0 Th=
ere does not
      appear to be a definition of the numeric value of=C2=A0 &quot;Implici=
t NULL&quot;
      in RFC 8277, which is the only relevant item in the normative
      references.=C2=A0 Is a reference to RFC 3032 Section 2.1 required?</f=
ont><div><div class=3D"h5"><br>
    <br>
    <br>
    <div class=3D"m_-7198941616784111413moz-cite-prefix">On 2/15/2018 8:37 =
AM, Alvaro Retana
      wrote:<br>
    </div>
    </div></div><blockquote type=3D"cite"><div><div class=3D"h5">
     =20
     =20
      <div id=3D"m_-7198941616784111413bloop_customfont" style=3D"font-fami=
ly:Helvetica,Arial;font-size:13px;color:rgba(0,0,0,1.0);margin:0px;line-hei=
ght:auto">Dear
        idr WG:</div>
      <div id=3D"m_-7198941616784111413bloop_customfont" style=3D"font-fami=
ly:Helvetica,Arial;font-size:13px;color:rgba(0,0,0,1.0);margin:0px;line-hei=
ght:auto"><br>
      </div>
      <div id=3D"m_-7198941616784111413bloop_customfont" style=3D"font-fami=
ly:Helvetica,Arial;font-size:13px;color:rgba(0,0,0,1.0);margin:0px;line-hei=
ght:auto">This
        draft has been through the WG and IESG process and it is waiting
        final approval for publication.</div>
      <div id=3D"m_-7198941616784111413bloop_customfont" style=3D"font-fami=
ly:Helvetica,Arial;font-size:13px;color:rgba(0,0,0,1.0);margin:0px;line-hei=
ght:auto"><br>
      </div>
      <div id=3D"m_-7198941616784111413bloop_customfont" style=3D"font-fami=
ly:Helvetica,Arial;font-size:13px;color:rgba(0,0,0,1.0);margin:0px;line-hei=
ght:auto">During
        the process some changes have been made, some of them
        significant enough that I want to call out for your attention.=C2=
=A0
        Please take a look at the latest version, specifically the
        updated text related to multiple prefixes/paths in sections 4.1
        and 4.2.=C2=A0 For your convenience, I think that the diff between
        -14 and -16 provides the clearest view:</div>
      <div id=3D"m_-7198941616784111413bloop_customfont" style=3D"font-fami=
ly:Helvetica,Arial;font-size:13px;color:rgba(0,0,0,1.0);margin:0px;line-hei=
ght:auto"><br>
      </div>
      <div id=3D"m_-7198941616784111413bloop_customfont" style=3D"margin:0p=
x"><a href=3D"https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__www.ie=
tf.org_rfcdiff-3Furl1-3Ddraft-2Dietf-2Didr-2Dbgp-2Dprefix-2Dsid-2D14-26url2=
-3Ddraft-2Dietf-2Didr-2Dbgp-2Dprefix-2Dsid-2D16&amp;d=3DDwMFaQ&amp;c=3DHAkY=
uh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&amp;r=3D-DXB84eU9m4cIlq2OOcCJCQQAwJ=
XQQswyu3F0kG0VNo&amp;m=3DyF0495B-NVp5DIlASsUbsM45SPzz8uoC8OecJguM3vA&amp;s=
=3Do2an32VlUxyFhi7bKueRpn-9Nnv_ixMZmg44gSvPndA&amp;e=3D" target=3D"_blank">=
https://www.ietf.org/rfcdiff?<wbr>url1=3Ddraft-ietf-idr-bgp-<wbr>prefix-sid=
-14&amp;url2=3Ddraft-ietf-<wbr>idr-bgp-prefix-sid-16</a>=C2=A0</div>
      <div id=3D"m_-7198941616784111413bloop_customfont" style=3D"margin:0p=
x"><br>
      </div>
      <div id=3D"m_-7198941616784111413bloop_customfont" style=3D"margin:0p=
x">I think the changes
        are fine and that they don=E2=80=99t require the document returning=
 to
        the WG.=C2=A0 But I just want to give you the opportunity to look a=
t
        them just in case.=C2=A0 If anyone has concerns, please reply to th=
is
        message.=C2=A0 I plan on approving the document for publication by
        the end of next week (Feb/23).</div>
      <div id=3D"m_-7198941616784111413bloop_customfont" style=3D"margin:0p=
x"><br>
      </div>
      <div id=3D"m_-7198941616784111413bloop_customfont" style=3D"margin:0p=
x">Thanks!</div>
      <div id=3D"m_-7198941616784111413bloop_customfont" style=3D"margin:0p=
x"><br>
      </div>
      <div id=3D"m_-7198941616784111413bloop_customfont" style=3D"margin:0p=
x">Alvaro.</div>
      <br>
      <p class=3D"m_-7198941616784111413airmail_on">On February 13, 2018 at=
 10:31:47 PM, <a href=3D"mailto:internet-drafts@ietf.org" target=3D"_blank"=
>internet-drafts@ietf.org</a>
        (<a href=3D"mailto:internet-drafts@ietf.org" target=3D"_blank">inte=
rnet-drafts@ietf.org</a>) wrote:</p>
      <blockquote type=3D"cite" class=3D"m_-7198941616784111413clean_bq"><s=
pan>
          <div>
            <div>
              <br>
              A New Internet-Draft is available from the on-line
              Internet-Drafts directories.
              <br>
              This draft is a work item of the Inter-Domain Routing WG
              of the IETF.
              <br>
              <br>
              Title : Segment Routing Prefix SID extensions for BGP
              <br>
              Authors : Stefano Previdi
              <br>
              Clarence Filsfils
              <br>
              Acee Lindem
              <br>
              Arjun Sreekantiah
              <br>
              Hannes Gredler
              <br>
              Filename : draft-ietf-idr-bgp-prefix-sid-<wbr>16.txt
              <br>
              Pages : 19
              <br>
              Date : 2018-02-13
              <br>
              <br>
              Abstract:
              <br>
              The Segment Routing (SR) architecture allows a node to
              steer a packet
              <br>
              flow through any topological path and service chain by
              leveraging
              <br>
              source routing. The ingress node prepends an SR header to
              a packet
              <br>
              containing a set of segment identifiers (SID). Each SID
              represents a
              <br>
              topological or a service-based instruction. Per-flow state
              is
              <br>
              maintained only on the ingress node of the SR domain.
              <br>
              <br>
              This document defines an optional, transitive BGP
              attribute for
              <br>
              announcing BGP Prefix Segment Identifiers (BGP Prefix-SID)
              <br>
              information.
              <br>
              <br>
              <br>
              <br>
              The IETF datatracker status page for this draft is:
              <br>
              <a href=3D"https://urldefense.proofpoint.com/v2/url?u=3Dhttps=
-3A__datatracker.ietf.org_doc_draft-2Dietf-2Didr-2Dbgp-2Dprefix-2Dsid_&amp;=
d=3DDwMFaQ&amp;c=3DHAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&amp;r=3D-DXB=
84eU9m4cIlq2OOcCJCQQAwJXQQswyu3F0kG0VNo&amp;m=3DyF0495B-NVp5DIlASsUbsM45SPz=
z8uoC8OecJguM3vA&amp;s=3DN0tgIIQyJcbiz8sY8xJGqoiz9XY0NgyZ4b2MCWOxPHU&amp;e=
=3D" target=3D"_blank">https://datatracker.ietf.org/<wbr>doc/draft-ietf-idr=
-bgp-prefix-<wbr>sid/</a>
              <br>
              <br>
              There are also htmlized versions available at:
              <br>
              <a href=3D"https://urldefense.proofpoint.com/v2/url?u=3Dhttps=
-3A__tools.ietf.org_html_draft-2Dietf-2Didr-2Dbgp-2Dprefix-2Dsid-2D16&amp;d=
=3DDwMFaQ&amp;c=3DHAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&amp;r=3D-DXB8=
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8uoC8OecJguM3vA&amp;s=3Dwwl2a9XgSSGYQmBMLUyjioJyIjaResJU63tV8Lh0oPw&amp;e=
=3D" target=3D"_blank">https://tools.ietf.org/html/<wbr>draft-ietf-idr-bgp-=
prefix-sid-<wbr>16</a>
              <br>
              <a href=3D"https://urldefense.proofpoint.com/v2/url?u=3Dhttps=
-3A__datatracker.ietf.org_doc_html_draft-2Dietf-2Didr-2Dbgp-2Dprefix-2Dsid-=
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Co&amp;e=3D" target=3D"_blank">https://datatracker.ietf.org/<wbr>doc/html/d=
raft-ietf-idr-bgp-<wbr>prefix-sid-16</a>
              <br>
              <br>
              A diff from the previous version is available at:
              <br>
              <a href=3D"https://urldefense.proofpoint.com/v2/url?u=3Dhttps=
-3A__www.ietf.org_rfcdiff-3Furl2-3Ddraft-2Dietf-2Didr-2Dbgp-2Dprefix-2Dsid-=
2D16&amp;d=3DDwMFaQ&amp;c=3DHAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&amp=
;r=3D-DXB84eU9m4cIlq2OOcCJCQQAwJXQQswyu3F0kG0VNo&amp;m=3DyF0495B-NVp5DIlASs=
UbsM45SPzz8uoC8OecJguM3vA&amp;s=3D7Ss6_8lzJDl0U3F8b4M9edpF1XG9JtyoZsQT_UMod=
j0&amp;e=3D" target=3D"_blank">https://www.ietf.org/rfcdiff?<wbr>url2=3Ddra=
ft-ietf-idr-bgp-<wbr>prefix-sid-16</a>
              <br>
              <br>
              <br>
              Please note that it may take a couple of minutes from the
              time of submission
              <br>
              until the htmlized version and diff are available at <a href=
=3D"https://urldefense.proofpoint.com/v2/url?u=3Dhttp-3A__tools.ietf.org&am=
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Pzz8uoC8OecJguM3vA&amp;s=3DIsdTJ6aSeBNSSLkVINQYQNQkfE9P-u1y5XX5UWwn_Mc&amp;=
e=3D" target=3D"_blank">tools.ietf.org</a>.
              <br>
              <br>
              Internet-Drafts are also available by anonymous FTP at:
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              <a href=3D"https://urldefense.proofpoint.com/v2/url?u=3Dftp-3=
A__ftp.ietf.org_internet-2Ddrafts_&amp;d=3DDwMFaQ&amp;c=3DHAkYuh63rsuhr6Scb=
fh0UjBXeMK-ndb3voDTXcWzoCI&amp;r=3D-DXB84eU9m4cIlq2OOcCJCQQAwJXQQswyu3F0kG0=
VNo&amp;m=3DyF0495B-NVp5DIlASsUbsM45SPzz8uoC8OecJguM3vA&amp;s=3DnTLjy0PEOtD=
6YPTrGm-XSaWEAWSxs_Tt4Wy7Bj2QzUo&amp;e=3D" target=3D"_blank">ftp://ftp.ietf=
.org/internet-<wbr>drafts/</a>
              <br>
              <br>
              ______________________________<wbr>_________________
              <br>
              I-D-Announce mailing list
              <br>
              <a href=3D"mailto:I-D-Announce@ietf.org" target=3D"_blank">I-=
D-Announce@ietf.org</a>
              <br>
              <a href=3D"https://urldefense.proofpoint.com/v2/url?u=3Dhttps=
-3A__www.ietf.org_mailman_listinfo_i-2Dd-2Dannounce&amp;d=3DDwMFaQ&amp;c=3D=
HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&amp;r=3D-DXB84eU9m4cIlq2OOcCJCQ=
QAwJXQQswyu3F0kG0VNo&amp;m=3DyF0495B-NVp5DIlASsUbsM45SPzz8uoC8OecJguM3vA&am=
p;s=3Dov1NLTv8StMXZBSroef794vxZBfq-prK4hAHyagtjEA&amp;e=3D" target=3D"_blan=
k">https://www.ietf.org/mailman/<wbr>listinfo/i-d-announce</a>
              <br>
              Internet-Draft directories: <a href=3D"https://urldefense.pro=
ofpoint.com/v2/url?u=3Dhttp-3A__www.ietf.org_shadow.html&amp;d=3DDwMFaQ&amp=
;c=3DHAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&amp;r=3D-DXB84eU9m4cIlq2OO=
cCJCQQAwJXQQswyu3F0kG0VNo&amp;m=3DyF0495B-NVp5DIlASsUbsM45SPzz8uoC8OecJguM3=
vA&amp;s=3Dd7rR32qUs_sytae8S7msinAcVI7aDCB9yocrL2B8YkU&amp;e=3D" target=3D"=
_blank">http://www.ietf.org/shadow.<wbr>html</a>
              <br>
              or <a href=3D"https://urldefense.proofpoint.com/v2/url?u=3Dft=
p-3A__ftp.ietf.org_ietf_1shadow-2Dsites.txt&amp;d=3DDwMFaQ&amp;c=3DHAkYuh63=
rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&amp;r=3D-DXB84eU9m4cIlq2OOcCJCQQAwJXQQs=
wyu3F0kG0VNo&amp;m=3DyF0495B-NVp5DIlASsUbsM45SPzz8uoC8OecJguM3vA&amp;s=3DMR=
B2kIaIcnJ0jVfRmVl4puiURIx9GFD_qwYk4i48Pow&amp;e=3D" target=3D"_blank">ftp:/=
/ftp.ietf.org/ietf/<wbr>1shadow-sites.txt</a>
              <br>
            </div>
          </div>
        </span></blockquote>
      <br>
      <fieldset class=3D"m_-7198941616784111413mimeAttachmentHeader"></fiel=
dset>
      <br>
      </div></div><pre>______________________________<wbr>_________________
Idr mailing list
<a class=3D"m_-7198941616784111413moz-txt-link-abbreviated" href=3D"mailto:=
Idr@ietf.org" target=3D"_blank">Idr@ietf.org</a>
<a class=3D"m_-7198941616784111413moz-txt-link-freetext" href=3D"https://ur=
ldefense.proofpoint.com/v2/url?u=3Dhttps-3A__www.ietf.org_mailman_listinfo_=
idr&amp;d=3DDwICAg&amp;c=3DHAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&amp;=
r=3D-DXB84eU9m4cIlq2OOcCJCQQAwJXQQswyu3F0kG0VNo&amp;m=3DyF0495B-NVp5DIlASsU=
bsM45SPzz8uoC8OecJguM3vA&amp;s=3DBzTPrKQqOu71SaROHiK_7IeUpNHd2pDnQ11o3H5_Ch=
E&amp;e=3D" target=3D"_blank">https://urldefense.proofpoint.<wbr>com/v2/url=
?u=3Dhttps-3A__www.<wbr>ietf.org_mailman_listinfo_idr&amp;<wbr>d=3DDwICAg&a=
mp;c=3D<wbr>HAkYuh63rsuhr6Scbfh0UjBXeMK-<wbr>ndb3voDTXcWzoCI&amp;r=3D-<wbr>=
DXB84eU9m4cIlq2OOcCJCQQAwJXQQs<wbr>wyu3F0kG0VNo&amp;m=3DyF0495B-<wbr>NVp5DI=
lASsUbsM45SPzz8uoC8OecJg<wbr>uM3vA&amp;s=3DBzTPrKQqOu71SaROHiK_<wbr>7IeUpNH=
d2pDnQ11o3H5_ChE&amp;e=3D</a>
</pre>
    </blockquote>
    <br>
  </div>

<br>______________________________<wbr>_________________<br>
Idr mailing list<br>
<a href=3D"mailto:Idr@ietf.org">Idr@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/idr" rel=3D"noreferrer" ta=
rget=3D"_blank">https://www.ietf.org/mailman/<wbr>listinfo/idr</a><br>
<br></blockquote></div><br></div>

--94eb2c1b531e62478d056544fa4d--


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From: "Acee Lindem (acee)" <acee@cisco.com>
To: Robert Raszuk <robert@raszuk.net>, Eric C Rosen <erosen@juniper.net>
CC: Alvaro Retana <aretana.ietf@gmail.com>, idr wg <idr@ietf.org>, "idr-chairs@ietf.org" <idr-chairs@ietf.org>, "draft-ietf-idr-bgp-prefix-sid@ietf.org" <draft-ietf-idr-bgp-prefix-sid@ietf.org>, Susan Hares <shares@ndzh.com>
Thread-Topic: [Idr] Review Updates to draft-ietf-idr-bgp-prefix-sid
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Archived-At: <https://mailarchive.ietf.org/arch/msg/idr/kE3hi7dNJv-MBj1J3am16gIFvVA>
Subject: Re: [Idr] Review Updates to draft-ietf-idr-bgp-prefix-sid
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A reference to the IANA "Special Purpose MPLS Label Values" registry 
would be more appropriate than my suggestion of a reference to RFC 3032.


On 2/15/2018 2:23 PM, Acee Lindem (acee) wrote:
>
> As the late-inning “closer” on this draft, I’m fine either way.
>
> Thanks,
>
> Acee
>
> *From: *<rraszuk@gmail.com> on behalf of Robert Raszuk <robert@raszuk.net>
> *Date: *Thursday, February 15, 2018 at 2:10 PM
> *To: *Eric C Rosen <erosen@juniper.net>
> *Cc: *Alvaro Retana <aretana.ietf@gmail.com>, IDR List <idr@ietf.org>, 
> "idr-chairs@ietf.org" <idr-chairs@ietf.org>, 
> "draft-ietf-idr-bgp-prefix-sid@ietf.org" 
> <draft-ietf-idr-bgp-prefix-sid@ietf.org>, Susan Hares <shares@ndzh.com>
> *Subject: *Re: [Idr] Review Updates to draft-ietf-idr-bgp-prefix-sid
> *Resent-From: *<alias-bounces@ietf.org>
> *Resent-To: *Stefano Previdi <stefano@previdi.net>, <cf@cisco.com>, 
> Acee Lindem <acee@cisco.com>, Arjun Sreekantiah <arjunhrs@gmail.com>, 
> <hannes@rtbrick.com>
> *Resent-Date: *Thursday, February 15, 2018 at 2:10 PM
>
> Hi Eric,
>
> Isn't the fact that a value is defined in IANA registry sufficient ?
>
> https://www.iana.org/assignments/mpls-label-values/mpls-label-values.xhtml<https://urldefense.proofpoint.com/v2/url?u=https-3A__www.iana.org_assignments_mpls-2Dlabel-2Dvalues_mpls-2Dlabel-2Dvalues.xhtml&d=DwMGaQ&c=HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=-DXB84eU9m4cIlq2OOcCJCQQAwJXQQswyu3F0kG0VNo&m=vtBIsDLv8jXDv1Fhpw5RUW4tFl3JG34pHtmL1Q6byW8&s=hEnyhlX4MtRvi4X7iZXuIpq647X-KvZjmH8ZuJXcxa0&e=>
>
> Do we have to quote all RFCs which define label values at each 
> subsequent work ?
>
> Thx,
>
> R.
>
> On Thu, Feb 15, 2018 at 4:07 PM, Eric C Rosen 
> <erosen@juniper.net<mailto:erosen@juniper.net>> wrote:
>
>     I note that the document still has the following text:
>
>     "a BGP speaker receiving a prefix with a BGP Prefix-SID attribute
>     and a label NLRI field of Implicit NULL"
>
>     Am I the only one who doesn't know what the numeric value of "a
>     label NLRI field of Implicit NULL" is?  There does not appear to
>     be a definition of the numeric value of "Implicit NULL" in RFC
>     8277, which is the only relevant item in the normative
>     references.  Is a reference to RFC 3032 Section 2.1 required?
>
>
>
>     On 2/15/2018 8:37 AM, Alvaro Retana wrote:
>
>         Dear idr WG:
>
>         This draft has been through the WG and IESG process and it is
>         waiting final approval for publication.
>
>         During the process some changes have been made, some of them
>         significant enough that I want to call out for your
>         attention.  Please take a look at the latest version,
>         specifically the updated text related to multiple
>         prefixes/paths in sections 4.1 and 4.2. For your convenience,
>         I think that the diff between -14 and -16 provides the
>         clearest view:
>
>         https://www.ietf.org/rfcdiff?url1=draft-ietf-idr-bgp-prefix-sid-14&url2=draft-ietf-idr-bgp-prefix-sid-16<https://urldefense.proofpoint.com/v2/url?u=https-3A__www.ietf.org_rfcdiff-3Furl1-3Ddraft-2Dietf-2Didr-2Dbgp-2Dprefix-2Dsid-2D14-26url2-3Ddraft-2Dietf-2Didr-2Dbgp-2Dprefix-2Dsid-2D16&d=DwMFaQ&c=HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=-DXB84eU9m4cIlq2OOcCJCQQAwJXQQswyu3F0kG0VNo&m=yF0495B-NVp5DIlASsUbsM45SPzz8uoC8OecJguM3vA&s=o2an32VlUxyFhi7bKueRpn-9Nnv_ixMZmg44gSvPndA&e=>
>
>         I think the changes are fine and that they don’t require the
>         document returning to the WG.  But I just want to give you the
>         opportunity to look at them just in case. If anyone has
>         concerns, please reply to this message.  I plan on approving
>         the document for publication by the end of next week (Feb/23).
>
>         Thanks!
>
>         Alvaro.
>
>         On February 13, 2018 at 10:31:47 PM,
>         internet-drafts@ietf.org<mailto:internet-drafts@ietf.org>(internet-drafts@ietf.org<mailto:internet-drafts@ietf.org>)
>         wrote:
>
>
>             A New Internet-Draft is available from the on-line
>             Internet-Drafts directories.
>             This draft is a work item of the Inter-Domain Routing WG
>             of the IETF.
>
>             Title : Segment Routing Prefix SID extensions for BGP
>             Authors : Stefano Previdi
>             Clarence Filsfils
>             Acee Lindem
>             Arjun Sreekantiah
>             Hannes Gredler
>             Filename : draft-ietf-idr-bgp-prefix-sid-16.txt
>             Pages : 19
>             Date : 2018-02-13
>
>             Abstract:
>             The Segment Routing (SR) architecture allows a node to
>             steer a packet
>             flow through any topological path and service chain by
>             leveraging
>             source routing. The ingress node prepends an SR header to
>             a packet
>             containing a set of segment identifiers (SID). Each SID
>             represents a
>             topological or a service-based instruction. Per-flow state is
>             maintained only on the ingress node of the SR domain.
>
>             This document defines an optional, transitive BGP
>             attribute for
>             announcing BGP Prefix Segment Identifiers (BGP Prefix-SID)
>             information.
>
>
>
>             The IETF datatracker status page for this draft is:
>             https://datatracker.ietf.org/doc/draft-ietf-idr-bgp-prefix-sid/<https://urldefense.proofpoint.com/v2/url?u=https-3A__datatracker.ietf.org_doc_draft-2Dietf-2Didr-2Dbgp-2Dprefix-2Dsid_&d=DwMFaQ&c=HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=-DXB84eU9m4cIlq2OOcCJCQQAwJXQQswyu3F0kG0VNo&m=yF0495B-NVp5DIlASsUbsM45SPzz8uoC8OecJguM3vA&s=N0tgIIQyJcbiz8sY8xJGqoiz9XY0NgyZ4b2MCWOxPHU&e=>
>
>             There are also htmlized versions available at:
>             https://tools.ietf.org/html/draft-ietf-idr-bgp-prefix-sid-16<https://urldefense.proofpoint.com/v2/url?u=https-3A__tools.ietf.org_html_draft-2Dietf-2Didr-2Dbgp-2Dprefix-2Dsid-2D16&d=DwMFaQ&c=HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=-DXB84eU9m4cIlq2OOcCJCQQAwJXQQswyu3F0kG0VNo&m=yF0495B-NVp5DIlASsUbsM45SPzz8uoC8OecJguM3vA&s=wwl2a9XgSSGYQmBMLUyjioJyIjaResJU63tV8Lh0oPw&e=>
>             https://datatracker.ietf.org/doc/html/draft-ietf-idr-bgp-prefix-sid-16<https://urldefense.proofpoint.com/v2/url?u=https-3A__datatracker.ietf.org_doc_html_draft-2Dietf-2Didr-2Dbgp-2Dprefix-2Dsid-2D16&d=DwMFaQ&c=HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=-DXB84eU9m4cIlq2OOcCJCQQAwJXQQswyu3F0kG0VNo&m=yF0495B-NVp5DIlASsUbsM45SPzz8uoC8OecJguM3vA&s=_PKFP2HU-RTOgNjv3cQOhwYyuwh5P5aOJa6mVSQzeCo&e=>
>
>             A diff from the previous version is available at:
>             https://www.ietf.org/rfcdiff?url2=draft-ietf-idr-bgp-prefix-sid-16<https://urldefense.proofpoint.com/v2/url?u=https-3A__www.ietf.org_rfcdiff-3Furl2-3Ddraft-2Dietf-2Didr-2Dbgp-2Dprefix-2Dsid-2D16&d=DwMFaQ&c=HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=-DXB84eU9m4cIlq2OOcCJCQQAwJXQQswyu3F0kG0VNo&m=yF0495B-NVp5DIlASsUbsM45SPzz8uoC8OecJguM3vA&s=7Ss6_8lzJDl0U3F8b4M9edpF1XG9JtyoZsQT_UModj0&e=>
>
>
>             Please note that it may take a couple of minutes from the
>             time of submission
>             until the htmlized version and diff are available at
>             tools.ietf.org<https://urldefense.proofpoint.com/v2/url?u=http-3A__tools.ietf.org&d=DwMFaQ&c=HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=-DXB84eU9m4cIlq2OOcCJCQQAwJXQQswyu3F0kG0VNo&m=yF0495B-NVp5DIlASsUbsM45SPzz8uoC8OecJguM3vA&s=IsdTJ6aSeBNSSLkVINQYQNQkfE9P-u1y5XX5UWwn_Mc&e=>.
>
>
>             Internet-Drafts are also available by anonymous FTP at:
>             ftp://ftp.ietf.org/internet-drafts/<https://urldefense.proofpoint.com/v2/url?u=ftp-3A__ftp.ietf.org_internet-2Ddrafts_&d=DwMFaQ&c=HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=-DXB84eU9m4cIlq2OOcCJCQQAwJXQQswyu3F0kG0VNo&m=yF0495B-NVp5DIlASsUbsM45SPzz8uoC8OecJguM3vA&s=nTLjy0PEOtD6YPTrGm-XSaWEAWSxs_Tt4Wy7Bj2QzUo&e=>
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>             _______________________________________________
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    A reference to the IANA "Special Purpose MPLS Label Values" registry
    would be more appropriate than my suggestion of a reference to RFC
    3032.<br>
    <br>
    <br>
    <div class="moz-cite-prefix">On 2/15/2018 2:23 PM, Acee Lindem
      (acee) wrote:<br>
    </div>
    <blockquote type="cite"
      cite="mid:97ABECBF-8B47-42A4-925F-EA8DBD4998C9@cisco.com">
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      <div class="WordSection1">
        <p class="MsoNormal">As the late-inning “closer” on this draft,
          I’m fine either way.
          <o:p></o:p></p>
        <p class="MsoNormal">Thanks,<o:p></o:p></p>
        <p class="MsoNormal">Acee <o:p></o:p></p>
        <p class="MsoNormal"> <o:p></o:p></p>
        <div style="border:none;border-top:solid #B5C4DF
          1.0pt;padding:3.0pt 0in 0in 0in">
          <p class="MsoNormal" style="margin-left:.5in"><b><span
                style="font-size:12.0pt;color:black">From:
              </span></b><span style="font-size:12.0pt;color:black"><a class="moz-txt-link-rfc2396E" href="mailto:rraszuk@gmail.com">&lt;rraszuk@gmail.com&gt;</a>
              on behalf of Robert Raszuk <a class="moz-txt-link-rfc2396E" href="mailto:robert@raszuk.net">&lt;robert@raszuk.net&gt;</a><br>
              <b>Date: </b>Thursday, February 15, 2018 at 2:10 PM<br>
              <b>To: </b>Eric C Rosen <a class="moz-txt-link-rfc2396E" href="mailto:erosen@juniper.net">&lt;erosen@juniper.net&gt;</a><br>
              <b>Cc: </b>Alvaro Retana <a class="moz-txt-link-rfc2396E" href="mailto:aretana.ietf@gmail.com">&lt;aretana.ietf@gmail.com&gt;</a>,
              IDR List <a class="moz-txt-link-rfc2396E" href="mailto:idr@ietf.org">&lt;idr@ietf.org&gt;</a>, <a class="moz-txt-link-rfc2396E" href="mailto:idr-chairs@ietf.org">"idr-chairs@ietf.org"</a>
              <a class="moz-txt-link-rfc2396E" href="mailto:idr-chairs@ietf.org">&lt;idr-chairs@ietf.org&gt;</a>,
              <a class="moz-txt-link-rfc2396E" href="mailto:draft-ietf-idr-bgp-prefix-sid@ietf.org">"draft-ietf-idr-bgp-prefix-sid@ietf.org"</a>
              <a class="moz-txt-link-rfc2396E" href="mailto:draft-ietf-idr-bgp-prefix-sid@ietf.org">&lt;draft-ietf-idr-bgp-prefix-sid@ietf.org&gt;</a>, Susan
              Hares <a class="moz-txt-link-rfc2396E" href="mailto:shares@ndzh.com">&lt;shares@ndzh.com&gt;</a><br>
              <b>Subject: </b>Re: [Idr] Review Updates to
              draft-ietf-idr-bgp-prefix-sid<br>
              <b>Resent-From: </b><a class="moz-txt-link-rfc2396E" href="mailto:alias-bounces@ietf.org">&lt;alias-bounces@ietf.org&gt;</a><br>
              <b>Resent-To: </b>Stefano Previdi
              <a class="moz-txt-link-rfc2396E" href="mailto:stefano@previdi.net">&lt;stefano@previdi.net&gt;</a>, <a class="moz-txt-link-rfc2396E" href="mailto:cf@cisco.com">&lt;cf@cisco.com&gt;</a>, Acee
              Lindem <a class="moz-txt-link-rfc2396E" href="mailto:acee@cisco.com">&lt;acee@cisco.com&gt;</a>, Arjun Sreekantiah
              <a class="moz-txt-link-rfc2396E" href="mailto:arjunhrs@gmail.com">&lt;arjunhrs@gmail.com&gt;</a>, <a class="moz-txt-link-rfc2396E" href="mailto:hannes@rtbrick.com">&lt;hannes@rtbrick.com&gt;</a><br>
              <b>Resent-Date: </b>Thursday, February 15, 2018 at 2:10
              PM<o:p></o:p></span></p>
        </div>
        <div>
          <p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
        </div>
        <div>
          <div>
            <p class="MsoNormal" style="margin-left:.5in"><a
                name="_MailOriginalBody" moz-do-not-send="true"><span
                  style="font-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif">Hi
                  Eric,<o:p></o:p></span></a></p>
          </div>
          <div>
            <p class="MsoNormal" style="margin-left:.5in"><span
                style="mso-bookmark:_MailOriginalBody"><span
                  style="font-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif"><o:p> </o:p></span></span></p>
          </div>
          <div>
            <p class="MsoNormal" style="margin-left:.5in"><span
                style="mso-bookmark:_MailOriginalBody"><span
                  style="font-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif">Isn't
                  the fact that a value is defined in IANA registry
                  sufficient ? <o:p></o:p></span></span></p>
          </div>
          <div>
            <p class="MsoNormal" style="margin-left:.5in"><span
                style="mso-bookmark:_MailOriginalBody"><span
                  style="font-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif"><o:p> </o:p></span></span></p>
          </div>
          <div>
            <p class="MsoNormal" style="margin-left:.5in"><span
                style="mso-bookmark:_MailOriginalBody"></span><a
href="https://urldefense.proofpoint.com/v2/url?u=https-3A__www.iana.org_assignments_mpls-2Dlabel-2Dvalues_mpls-2Dlabel-2Dvalues.xhtml&amp;d=DwMGaQ&amp;c=HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&amp;r=-DXB84eU9m4cIlq2OOcCJCQQAwJXQQswyu3F0kG0VNo&amp;m=vtBIsDLv8jXDv1Fhpw5RUW4tFl3JG34pHtmL1Q6byW8&amp;s=hEnyhlX4MtRvi4X7iZXuIpq647X-KvZjmH8ZuJXcxa0&amp;e="
                moz-do-not-send="true"><span
                  style="mso-bookmark:_MailOriginalBody"><span
                    style="font-family:&quot;Arial&quot;,sans-serif">https://www.iana.org/assignments/mpls-label-values/mpls-label-values.xhtml</span></span><span
                  style="mso-bookmark:_MailOriginalBody"></span></a><span
                style="mso-bookmark:_MailOriginalBody"><o:p></o:p></span></p>
          </div>
          <div>
            <p class="MsoNormal" style="margin-left:.5in"><span
                style="mso-bookmark:_MailOriginalBody"><o:p> </o:p></span></p>
          </div>
          <div>
            <p class="MsoNormal" style="margin-left:.5in"><span
                style="mso-bookmark:_MailOriginalBody"><span
                  style="font-family:&quot;Arial&quot;,sans-serif">Do we
                  have to quote all RFCs which define label values at
                  each subsequent work ? </span></span><span
                style="mso-bookmark:_MailOriginalBody"><o:p></o:p></span></p>
          </div>
          <div>
            <p class="MsoNormal" style="margin-left:.5in"><span
                style="mso-bookmark:_MailOriginalBody"><o:p> </o:p></span></p>
          </div>
          <div>
            <p class="MsoNormal" style="margin-left:.5in"><span
                style="mso-bookmark:_MailOriginalBody"><span
                  style="font-family:&quot;Arial&quot;,sans-serif">Thx,</span></span><span
                style="mso-bookmark:_MailOriginalBody"><o:p></o:p></span></p>
          </div>
          <div>
            <p class="MsoNormal" style="margin-left:.5in"><span
                style="mso-bookmark:_MailOriginalBody"><span
                  style="font-family:&quot;Arial&quot;,sans-serif">R.</span></span><span
                style="mso-bookmark:_MailOriginalBody"><o:p></o:p></span></p>
          </div>
          <div>
            <p class="MsoNormal" style="margin-left:.5in"><span
                style="mso-bookmark:_MailOriginalBody"><o:p> </o:p></span></p>
          </div>
          <div>
            <p class="MsoNormal" style="margin-left:.5in"><span
                style="mso-bookmark:_MailOriginalBody"><o:p> </o:p></span></p>
          </div>
        </div>
        <div>
          <p class="MsoNormal" style="margin-left:.5in"><span
              style="mso-bookmark:_MailOriginalBody"><o:p> </o:p></span></p>
          <div>
            <p class="MsoNormal" style="margin-left:.5in"><span
                style="mso-bookmark:_MailOriginalBody">On Thu, Feb 15,
                2018 at 4:07 PM, Eric C Rosen &lt;</span><a
                href="mailto:erosen@juniper.net" target="_blank"
                moz-do-not-send="true"><span
                  style="mso-bookmark:_MailOriginalBody">erosen@juniper.net</span><span
                  style="mso-bookmark:_MailOriginalBody"></span></a><span
                style="mso-bookmark:_MailOriginalBody">&gt; wrote:<o:p></o:p></span></p>
            <blockquote style="border:none;border-left:solid #CCCCCC
              1.0pt;padding:0in 0in 0in
              6.0pt;margin-left:4.8pt;margin-right:0in">
              <div>
                <p class="MsoNormal" style="margin-left:.5in"><span
                    style="mso-bookmark:_MailOriginalBody"><span
                      style="font-size:10.0pt">I note that the document
                      still has the following text:</span></span><span
                    style="mso-bookmark:_MailOriginalBody"><br>
                    <br>
                    "a BGP speaker receiving a prefix with a BGP
                    Prefix-SID attribute and a label NLRI field of
                    Implicit NULL"<br>
                    <br>
                  </span><span style="mso-bookmark:_MailOriginalBody"><span
                      style="font-size:10.0pt">Am I the only one who
                      doesn't know what the numeric value of "a label
                      NLRI field of Implicit NULL" is?  There does not
                      appear to be a definition of the numeric value of 
                      "Implicit NULL" in RFC 8277, which is the only
                      relevant item in the normative references.  Is a
                      reference to RFC 3032 Section 2.1 required?</span></span><span
                    style="mso-bookmark:_MailOriginalBody">
                    <o:p></o:p></span></p>
                <div>
                  <div>
                    <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:12.0pt;margin-left:.5in"><span
                        style="mso-bookmark:_MailOriginalBody"><br>
                        <br>
                        <o:p></o:p></span></p>
                    <div>
                      <p class="MsoNormal" style="margin-left:.5in"><span
                          style="mso-bookmark:_MailOriginalBody">On
                          2/15/2018 8:37 AM, Alvaro Retana wrote:<o:p></o:p></span></p>
                    </div>
                  </div>
                </div>
                <blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
                  <div>
                    <div>
                      <div id="m_-7198941616784111413bloop_customfont">
                        <p class="MsoNormal" style="margin-left:.5in"><span
                            style="mso-bookmark:_MailOriginalBody"><span
style="font-size:10.0pt;font-family:Helvetica">Dear idr WG:<o:p></o:p></span></span></p>
                      </div>
                      <div id="m_-7198941616784111413bloop_customfont">
                        <p class="MsoNormal" style="margin-left:.5in"><span
                            style="mso-bookmark:_MailOriginalBody"><span
style="font-size:10.0pt;font-family:Helvetica"><o:p> </o:p></span></span></p>
                      </div>
                      <div id="m_-7198941616784111413bloop_customfont">
                        <p class="MsoNormal" style="margin-left:.5in"><span
                            style="mso-bookmark:_MailOriginalBody"><span
style="font-size:10.0pt;font-family:Helvetica">This draft has been
                              through the WG and IESG process and it is
                              waiting final approval for publication.<o:p></o:p></span></span></p>
                      </div>
                      <div id="m_-7198941616784111413bloop_customfont">
                        <p class="MsoNormal" style="margin-left:.5in"><span
                            style="mso-bookmark:_MailOriginalBody"><span
style="font-size:10.0pt;font-family:Helvetica"><o:p> </o:p></span></span></p>
                      </div>
                      <div id="m_-7198941616784111413bloop_customfont">
                        <p class="MsoNormal" style="margin-left:.5in"><span
                            style="mso-bookmark:_MailOriginalBody"><span
style="font-size:10.0pt;font-family:Helvetica">During the process some
                              changes have been made, some of them
                              significant enough that I want to call out
                              for your attention.  Please take a look at
                              the latest version, specifically the
                              updated text related to multiple
                              prefixes/paths in sections 4.1 and 4.2. 
                              For your convenience, I think that the
                              diff between -14 and -16 provides the
                              clearest view:<o:p></o:p></span></span></p>
                      </div>
                      <div id="m_-7198941616784111413bloop_customfont">
                        <p class="MsoNormal" style="margin-left:.5in"><span
                            style="mso-bookmark:_MailOriginalBody"><span
style="font-size:10.0pt;font-family:Helvetica"><o:p> </o:p></span></span></p>
                      </div>
                      <div id="m_-7198941616784111413bloop_customfont">
                        <p class="MsoNormal" style="margin-left:.5in"><span
                            style="mso-bookmark:_MailOriginalBody"></span><a
href="https://urldefense.proofpoint.com/v2/url?u=https-3A__www.ietf.org_rfcdiff-3Furl1-3Ddraft-2Dietf-2Didr-2Dbgp-2Dprefix-2Dsid-2D14-26url2-3Ddraft-2Dietf-2Didr-2Dbgp-2Dprefix-2Dsid-2D16&amp;d=DwMFaQ&amp;c=HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&amp;r=-DXB84eU9m4cIlq2OOcCJCQQAwJXQQswyu3F0kG0VNo&amp;m=yF0495B-NVp5DIlASsUbsM45SPzz8uoC8OecJguM3vA&amp;s=o2an32VlUxyFhi7bKueRpn-9Nnv_ixMZmg44gSvPndA&amp;e="
                            target="_blank" moz-do-not-send="true"><span
                              style="mso-bookmark:_MailOriginalBody">https://www.ietf.org/rfcdiff?url1=draft-ietf-idr-bgp-prefix-sid-14&amp;url2=draft-ietf-idr-bgp-prefix-sid-16</span><span
                              style="mso-bookmark:_MailOriginalBody"></span></a><span
                            style="mso-bookmark:_MailOriginalBody"> <o:p></o:p></span></p>
                      </div>
                      <div id="m_-7198941616784111413bloop_customfont">
                        <p class="MsoNormal" style="margin-left:.5in"><span
                            style="mso-bookmark:_MailOriginalBody"><o:p> </o:p></span></p>
                      </div>
                      <div id="m_-7198941616784111413bloop_customfont">
                        <p class="MsoNormal" style="margin-left:.5in"><span
                            style="mso-bookmark:_MailOriginalBody">I
                            think the changes are fine and that they
                            don’t require the document returning to the
                            WG.  But I just want to give you the
                            opportunity to look at them just in case. 
                            If anyone has concerns, please reply to this
                            message.  I plan on approving the document
                            for publication by the end of next week
                            (Feb/23).<o:p></o:p></span></p>
                      </div>
                      <div id="m_-7198941616784111413bloop_customfont">
                        <p class="MsoNormal" style="margin-left:.5in"><span
                            style="mso-bookmark:_MailOriginalBody"><o:p> </o:p></span></p>
                      </div>
                      <div id="m_-7198941616784111413bloop_customfont">
                        <p class="MsoNormal" style="margin-left:.5in"><span
                            style="mso-bookmark:_MailOriginalBody">Thanks!<o:p></o:p></span></p>
                      </div>
                      <div id="m_-7198941616784111413bloop_customfont">
                        <p class="MsoNormal" style="margin-left:.5in"><span
                            style="mso-bookmark:_MailOriginalBody"><o:p> </o:p></span></p>
                      </div>
                      <div id="m_-7198941616784111413bloop_customfont">
                        <p class="MsoNormal" style="margin-left:.5in"><span
                            style="mso-bookmark:_MailOriginalBody">Alvaro.<o:p></o:p></span></p>
                      </div>
                      <p class="MsoNormal" style="margin-left:.5in"><span
                          style="mso-bookmark:_MailOriginalBody"><o:p> </o:p></span></p>
                      <p class="m-7198941616784111413airmailon"
                        style="margin-left:.5in"><span
                          style="mso-bookmark:_MailOriginalBody">On
                          February 13, 2018 at 10:31:47 PM,
                        </span><a href="mailto:internet-drafts@ietf.org"
                          target="_blank" moz-do-not-send="true"><span
                            style="mso-bookmark:_MailOriginalBody">internet-drafts@ietf.org</span><span
                            style="mso-bookmark:_MailOriginalBody"></span></a><span
                          style="mso-bookmark:_MailOriginalBody"> (</span><a
                          href="mailto:internet-drafts@ietf.org"
                          target="_blank" moz-do-not-send="true"><span
                            style="mso-bookmark:_MailOriginalBody">internet-drafts@ietf.org</span><span
                            style="mso-bookmark:_MailOriginalBody"></span></a><span
                          style="mso-bookmark:_MailOriginalBody">)
                          wrote:<o:p></o:p></span></p>
                      <blockquote
                        style="margin-top:5.0pt;margin-bottom:5.0pt">
                        <div>
                          <div>
                            <p class="MsoNormal"
                              style="margin-left:.5in"><span
                                style="mso-bookmark:_MailOriginalBody"><br>
                                A New Internet-Draft is available from
                                the on-line Internet-Drafts directories.
                                <br>
                                This draft is a work item of the
                                Inter-Domain Routing WG of the IETF. <br>
                                <br>
                                Title : Segment Routing Prefix SID
                                extensions for BGP <br>
                                Authors : Stefano Previdi <br>
                                Clarence Filsfils <br>
                                Acee Lindem <br>
                                Arjun Sreekantiah <br>
                                Hannes Gredler <br>
                                Filename :
                                draft-ietf-idr-bgp-prefix-sid-16.txt <br>
                                Pages : 19 <br>
                                Date : 2018-02-13 <br>
                                <br>
                                Abstract: <br>
                                The Segment Routing (SR) architecture
                                allows a node to steer a packet <br>
                                flow through any topological path and
                                service chain by leveraging <br>
                                source routing. The ingress node
                                prepends an SR header to a packet <br>
                                containing a set of segment identifiers
                                (SID). Each SID represents a <br>
                                topological or a service-based
                                instruction. Per-flow state is <br>
                                maintained only on the ingress node of
                                the SR domain. <br>
                                <br>
                                This document defines an optional,
                                transitive BGP attribute for <br>
                                announcing BGP Prefix Segment
                                Identifiers (BGP Prefix-SID) <br>
                                information. <br>
                                <br>
                                <br>
                                <br>
                                The IETF datatracker status page for
                                this draft is: <br>
                              </span><a
href="https://urldefense.proofpoint.com/v2/url?u=https-3A__datatracker.ietf.org_doc_draft-2Dietf-2Didr-2Dbgp-2Dprefix-2Dsid_&amp;d=DwMFaQ&amp;c=HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&amp;r=-DXB84eU9m4cIlq2OOcCJCQQAwJXQQswyu3F0kG0VNo&amp;m=yF0495B-NVp5DIlASsUbsM45SPzz8uoC8OecJguM3vA&amp;s=N0tgIIQyJcbiz8sY8xJGqoiz9XY0NgyZ4b2MCWOxPHU&amp;e="
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                  <pre style="margin-left:.5in"><span style="mso-bookmark:_MailOriginalBody">_______________________________________________<o:p></o:p></span></pre>
                  <pre style="margin-left:.5in"><span style="mso-bookmark:_MailOriginalBody">Idr mailing list<o:p></o:p></span></pre>
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                <p class="MsoNormal" style="margin-left:.5in"><span
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From: "Acee Lindem (acee)" <acee@cisco.com>
To: Eric C Rosen <erosen@juniper.net>, Robert Raszuk <robert@raszuk.net>
CC: Alvaro Retana <aretana.ietf@gmail.com>, idr wg <idr@ietf.org>, "idr-chairs@ietf.org" <idr-chairs@ietf.org>, "draft-ietf-idr-bgp-prefix-sid@ietf.org" <draft-ietf-idr-bgp-prefix-sid@ietf.org>, Susan Hares <shares@ndzh.com>
Thread-Topic: [Idr] Review Updates to draft-ietf-idr-bgp-prefix-sid
Thread-Index: AQHTpmIgFs+SSO9cV0+ODlSbDcKpmaOl5FyAgABD6YD//6/UAIAAWNiA//+xkIA=
Date: Thu, 15 Feb 2018 20:00:34 +0000
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From: "Acee Lindem (acee)" <acee@cisco.com>
To: Alvaro Retana <aretana.ietf@gmail.com>, "idr@ietf.org" <idr@ietf.org>
CC: "draft-ietf-idr-bgp-prefix-sid@ietf.org" <draft-ietf-idr-bgp-prefix-sid@ietf.org>, "idr-chairs@ietf.org" <idr-chairs@ietf.org>, Susan Hares <shares@ndzh.com>
Thread-Topic: Review Updates to draft-ietf-idr-bgp-prefix-sid
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Date: Sat, 17 Feb 2018 20:40:59 +0000
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Date: Sat, 17 Feb 2018 13:23:35 -0800
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To: "Acee Lindem (acee)" <acee@cisco.com>
Cc: Alvaro Retana <aretana.ietf@gmail.com>, "idr@ietf.org" <idr@ietf.org>,  "idr-chairs@ietf.org" <idr-chairs@ietf.org>, Susan Hares <shares@ndzh.com>,  "draft-ietf-idr-bgp-prefix-sid@ietf.org" <draft-ietf-idr-bgp-prefix-sid@ietf.org>
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Subject: Re: [Idr] Review Updates to draft-ietf-idr-bgp-prefix-sid
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strong +1 from having reviewed the draft in SG if it's really not
implemented by anyone ... This will

1. simplify the draft significantly and improve its readability
2. remove bunch of weird corner cases I commented on that would need
specification if v6 is in it

Otherwise only serious comments pending was the clarity/correctness of the
forwarding section (but I admit I did NOT read the newest version published
so maybe they have been taken up) AFAIR ..

On Sat, Feb 17, 2018 at 12:40 PM, Acee Lindem (acee) <acee@cisco.com> wrote=
:

> Dear Alvaro and IDR WG:
>
>
>
>      There is one more change we=E2=80=99d like to make to the draft that=
 requires
> WG approval. One revelation during the review process for this draft is
> that the SRv6 use case as currently documented isn=E2=80=99t really that =
compelling
> and there are some details that are unspecified. Other than validation, t=
he
> IPv6 SID TLV hasn=E2=80=99t been implemented. Consequently, we=E2=80=99d =
like to remove the
> IPv6 SID TLV and SRv6 dataplane specification from the draft. Are there a=
ny
> objections (other than the obvious one that it is very late to be making
> this change)?
>
>
>
> Here are a list of implementations and none have implemented the IPv6 SID=
:
>
> https://trac.ietf.org/trac/idr/wiki/draft-ietf-idr-bgp-
> prefix-sid%20implementations
>
>
>
> Note that the code point for the IPv6 SID would be deprecated since
> validation has been implemented in several implementations.
>
>
>
> If there are no objections, I could make this change next week and we
> could allow for an additional week for review.
>
>
>
> Thanks,
>
> Acee
>
>
>
>
>
>
>
>
>
> *From: *Alvaro Retana <aretana.ietf@gmail.com>
> *Date: *Thursday, February 15, 2018 at 8:37 AM
> *To: *IDR List <idr@ietf.org>
> *Cc: *"draft-ietf-idr-bgp-prefix-sid@ietf.org" <draft-ietf-idr-bgp-prefix=
-
> sid@ietf.org>, "idr-chairs@ietf.org" <idr-chairs@ietf.org>, Susan Hares <
> shares@ndzh.com>
> *Subject: *Review Updates to draft-ietf-idr-bgp-prefix-sid
> *Resent-From: *<alias-bounces@ietf.org>
> *Resent-To: *Stefano Previdi <stefano@previdi.net>, <cf@cisco.com>, Acee
> Lindem <acee@cisco.com>, Arjun Sreekantiah <arjunhrs@gmail.com>, <
> hannes@rtbrick.com>
> *Resent-Date: *Thursday, February 15, 2018 at 8:37 AM
>
>
>
> Dear idr WG:
>
>
>
> This draft has been through the WG and IESG process and it is waiting
> final approval for publication.
>
>
>
> During the process some changes have been made, some of them significant
> enough that I want to call out for your attention.  Please take a look at
> the latest version, specifically the updated text related to multiple
> prefixes/paths in sections 4.1 and 4.2.  For your convenience, I think th=
at
> the diff between -14 and -16 provides the clearest view:
>
>
>
> https://www.ietf.org/rfcdiff?url1=3Ddraft-ietf-idr-bgp-
> prefix-sid-14&url2=3Ddraft-ietf-idr-bgp-prefix-sid-16
>
>
>
> I think the changes are fine and that they don=E2=80=99t require the docu=
ment
> returning to the WG.  But I just want to give you the opportunity to look
> at them just in case.  If anyone has concerns, please reply to this
> message.  I plan on approving the document for publication by the end of
> next week (Feb/23).
>
>
>
> Thanks!
>
>
>
> Alvaro.
>
>
>
> On February 13, 2018 at 10:31:47 PM, internet-drafts@ietf.org (
> internet-drafts@ietf.org) wrote:
>
>
> A New Internet-Draft is available from the on-line Internet-Drafts
> directories.
> This draft is a work item of the Inter-Domain Routing WG of the IETF.
>
> Title : Segment Routing Prefix SID extensions for BGP
> Authors : Stefano Previdi
> Clarence Filsfils
> Acee Lindem
> Arjun Sreekantiah
> Hannes Gredler
> Filename : draft-ietf-idr-bgp-prefix-sid-16.txt
> Pages : 19
> Date : 2018-02-13
>
> Abstract:
> The Segment Routing (SR) architecture allows a node to steer a packet
> flow through any topological path and service chain by leveraging
> source routing. The ingress node prepends an SR header to a packet
> containing a set of segment identifiers (SID). Each SID represents a
> topological or a service-based instruction. Per-flow state is
> maintained only on the ingress node of the SR domain.
>
> This document defines an optional, transitive BGP attribute for
> announcing BGP Prefix Segment Identifiers (BGP Prefix-SID)
> information.
>
>
>
> The IETF datatracker status page for this draft is:
> https://datatracker.ietf.org/doc/draft-ietf-idr-bgp-prefix-sid/
>
> There are also htmlized versions available at:
> https://tools.ietf.org/html/draft-ietf-idr-bgp-prefix-sid-16
> https://datatracker.ietf.org/doc/html/draft-ietf-idr-bgp-prefix-sid-16
>
> A diff from the previous version is available at:
> https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-idr-bgp-prefix-sid-16
>
>
> Please note that it may take a couple of minutes from the time of
> submission
> until the htmlized version and diff are available at tools.ietf.org.
>
> Internet-Drafts are also available by anonymous FTP at:
> ftp://ftp.ietf.org/internet-drafts/
>
> _______________________________________________
> I-D-Announce mailing list
> I-D-Announce@ietf.org
> https://www.ietf.org/mailman/listinfo/i-d-announce
> Internet-Draft directories: http://www.ietf.org/shadow.html
> or ftp://ftp.ietf.org/ietf/1shadow-sites.txt
>
>
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr
>
>

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Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div><div><div>strong +1 from having reviewed the draft in=
 SG if it&#39;s really not implemented by anyone ... This will<br><br></div=
>1. simplify the draft significantly and improve its readability <br></div>=
2. remove bunch of weird corner cases I commented on that would need specif=
ication if v6 is in it <br><br></div>Otherwise only serious comments pendin=
g was the clarity/correctness of the forwarding section (but I admit I did =
NOT read the newest version published so maybe they have been taken up) AFA=
IR .. <br></div><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">O=
n Sat, Feb 17, 2018 at 12:40 PM, Acee Lindem (acee) <span dir=3D"ltr">&lt;<=
a href=3D"mailto:acee@cisco.com" target=3D"_blank">acee@cisco.com</a>&gt;</=
span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8e=
x;border-left:1px #ccc solid;padding-left:1ex">





<div link=3D"blue" vlink=3D"purple" lang=3D"EN-US">
<div class=3D"m_-1234778154279074976WordSection1">
<p class=3D"MsoNormal">Dear Alvaro and IDR WG: <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 There is one more change we=
=E2=80=99d like to make to the draft that requires WG approval. One revelat=
ion during the review process for this draft is that the SRv6 use case as c=
urrently documented isn=E2=80=99t really that compelling and there are
 some details that are unspecified. Other than validation, the IPv6 SID TLV=
 hasn=E2=80=99t been implemented. Consequently, we=E2=80=99d like to remove=
 the IPv6 SID TLV and SRv6 dataplane specification from the draft. Are ther=
e any objections (other than the obvious one that
 it is very late to be making this change)? <u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0=C2=A0=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">Here are a list of implementations and none have imp=
lemented the IPv6 SID:<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u><u></u></p>
<p class=3D"MsoNormal"><a href=3D"https://trac.ietf.org/trac/idr/wiki/draft=
-ietf-idr-bgp-prefix-sid%20implementations" target=3D"_blank">https://trac.=
ietf.org/trac/<wbr>idr/wiki/draft-ietf-idr-bgp-<wbr>prefix-sid%20implementa=
tions</a><u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">Note that the code point for the IPv6 SID would be d=
eprecated since validation has been implemented in several implementations.=
 =C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">If there are no objections, I could make this change=
 next week and we could allow for an additional week for review.
<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">Acee <u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div style=3D"border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><b><span style=3D"font-si=
ze:12.0pt;color:black">From:
</span></b><span style=3D"font-size:12.0pt;color:black">Alvaro Retana &lt;<=
a href=3D"mailto:aretana.ietf@gmail.com" target=3D"_blank">aretana.ietf@gma=
il.com</a>&gt;<br>
<b>Date: </b>Thursday, February 15, 2018 at 8:37 AM<br>
<b>To: </b>IDR List &lt;<a href=3D"mailto:idr@ietf.org" target=3D"_blank">i=
dr@ietf.org</a>&gt;<br>
<b>Cc: </b>&quot;<a href=3D"mailto:draft-ietf-idr-bgp-prefix-sid@ietf.org" =
target=3D"_blank">draft-ietf-idr-bgp-prefix-<wbr>sid@ietf.org</a>&quot; &lt=
;<a href=3D"mailto:draft-ietf-idr-bgp-prefix-sid@ietf.org" target=3D"_blank=
">draft-ietf-idr-bgp-prefix-<wbr>sid@ietf.org</a>&gt;, &quot;<a href=3D"mai=
lto:idr-chairs@ietf.org" target=3D"_blank">idr-chairs@ietf.org</a>&quot; &l=
t;<a href=3D"mailto:idr-chairs@ietf.org" target=3D"_blank">idr-chairs@ietf.=
org</a>&gt;, Susan Hares &lt;<a href=3D"mailto:shares@ndzh.com" target=3D"_=
blank">shares@ndzh.com</a>&gt;<br>
<b>Subject: </b>Review Updates to draft-ietf-idr-bgp-prefix-sid<span class=
=3D""><br>
<b>Resent-From: </b>&lt;<a href=3D"mailto:alias-bounces@ietf.org" target=3D=
"_blank">alias-bounces@ietf.org</a>&gt;<br>
<b>Resent-To: </b>Stefano Previdi &lt;<a href=3D"mailto:stefano@previdi.net=
" target=3D"_blank">stefano@previdi.net</a>&gt;, &lt;<a href=3D"mailto:cf@c=
isco.com" target=3D"_blank">cf@cisco.com</a>&gt;, Acee Lindem &lt;<a href=
=3D"mailto:acee@cisco.com" target=3D"_blank">acee@cisco.com</a>&gt;, Arjun =
Sreekantiah &lt;<a href=3D"mailto:arjunhrs@gmail.com" target=3D"_blank">arj=
unhrs@gmail.com</a>&gt;, &lt;<a href=3D"mailto:hannes@rtbrick.com" target=
=3D"_blank">hannes@rtbrick.com</a>&gt;<br>
</span><b>Resent-Date: </b>Thursday, February 15, 2018 at 8:37 AM<u></u><u>=
</u></span></p>
</div><div><div class=3D"h5">
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><u></u>=C2=A0<u></u></p>
</div>
<div id=3D"m_-1234778154279074976bloop_customfont">
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><a name=3D"m_-12347781542=
79074976__MailOriginalBody"><span style=3D"font-size:10.0pt;font-family:Hel=
vetica">Dear idr WG:<u></u><u></u></span></a></p>
</div>
<div id=3D"m_-1234778154279074976bloop_customfont">
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><span style=3D"font=
-size:10.0pt;font-family:Helvetica"><u></u>=C2=A0<u></u></span></span></p>
</div>
<div id=3D"m_-1234778154279074976bloop_customfont">
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><span style=3D"font=
-size:10.0pt;font-family:Helvetica">This draft has been through the WG and =
IESG process and it is waiting final approval for publication.<u></u><u></u=
></span></span></p>
</div>
<div id=3D"m_-1234778154279074976bloop_customfont">
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><span style=3D"font=
-size:10.0pt;font-family:Helvetica"><u></u>=C2=A0<u></u></span></span></p>
</div>
<div id=3D"m_-1234778154279074976bloop_customfont">
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><span style=3D"font=
-size:10.0pt;font-family:Helvetica">During the process some changes have be=
en made, some of them significant enough that I want to call out for your
 attention.=C2=A0 Please take a look at the latest version, specifically th=
e updated text related to multiple prefixes/paths in sections 4.1 and 4.2.=
=C2=A0 For your convenience, I think that the diff between -14 and -16 prov=
ides the clearest view:<u></u><u></u></span></span></p>
</div>
<div id=3D"m_-1234778154279074976bloop_customfont">
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><span style=3D"font=
-size:10.0pt;font-family:Helvetica"><u></u>=C2=A0<u></u></span></span></p>
</div>
<div id=3D"m_-1234778154279074976bloop_customfont">
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span></span><a href=3D"h=
ttps://www.ietf.org/rfcdiff?url1=3Ddraft-ietf-idr-bgp-prefix-sid-14&amp;url=
2=3Ddraft-ietf-idr-bgp-prefix-sid-16" target=3D"_blank"><span>https://www.i=
etf.org/rfcdiff?<wbr>url1=3Ddraft-ietf-idr-bgp-<wbr>prefix-sid-14&amp;url2=
=3Ddraft-ietf-<wbr>idr-bgp-prefix-sid-16</span><span></span></a><span>=C2=
=A0<u></u><u></u></span></p>
</div>
<div id=3D"m_-1234778154279074976bloop_customfont">
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><u></u>=C2=A0<u></u=
></span></p>
</div>
<div id=3D"m_-1234778154279074976bloop_customfont">
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span>I think the changes=
 are fine and that they don=E2=80=99t require the document returning to the=
 WG.=C2=A0 But I just want to give you the opportunity to look at them just=
 in case.=C2=A0
 If anyone has concerns, please reply to this message.=C2=A0 I plan on appr=
oving the document for publication by the end of next week (Feb/23).<u></u>=
<u></u></span></p>
</div>
<div id=3D"m_-1234778154279074976bloop_customfont">
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><u></u>=C2=A0<u></u=
></span></p>
</div>
<div id=3D"m_-1234778154279074976bloop_customfont">
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span>Thanks!<u></u><u></=
u></span></p>
</div>
<div id=3D"m_-1234778154279074976bloop_customfont">
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><u></u>=C2=A0<u></u=
></span></p>
</div>
<div id=3D"m_-1234778154279074976bloop_customfont">
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span>Alvaro.<u></u><u></=
u></span></p>
</div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><u></u>=C2=A0<u></u=
></span></p>
<p class=3D"m_-1234778154279074976airmailon" style=3D"margin-left:.5in"><sp=
an>On February 13, 2018 at 10:31:47 PM,
</span><a href=3D"mailto:internet-drafts@ietf.org" target=3D"_blank"><span>=
internet-drafts@ietf.org</span><span></span></a><span> (</span><a href=3D"m=
ailto:internet-drafts@ietf.org" target=3D"_blank"><span>internet-drafts@iet=
f.org</span><span></span></a><span>)
 wrote:<u></u><u></u></span></p>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><br>
A New Internet-Draft is available from the on-line Internet-Drafts director=
ies. <br>
This draft is a work item of the Inter-Domain Routing WG of the IETF. <br>
<br>
Title : Segment Routing Prefix SID extensions for BGP <br>
Authors : Stefano Previdi <br>
Clarence Filsfils <br>
Acee Lindem <br>
Arjun Sreekantiah <br>
Hannes Gredler <br>
Filename : draft-ietf-idr-bgp-prefix-sid-<wbr>16.txt <br>
Pages : 19 <br>
Date : 2018-02-13 <br>
<br>
Abstract: <br>
The Segment Routing (SR) architecture allows a node to steer a packet <br>
flow through any topological path and service chain by leveraging <br>
source routing. The ingress node prepends an SR header to a packet <br>
containing a set of segment identifiers (SID). Each SID represents a <br>
topological or a service-based instruction. Per-flow state is <br>
maintained only on the ingress node of the SR domain. <br>
<br>
This document defines an optional, transitive BGP attribute for <br>
announcing BGP Prefix Segment Identifiers (BGP Prefix-SID) <br>
information. <br>
<br>
<br>
<br>
The IETF datatracker status page for this draft is: <br>
</span><a href=3D"https://datatracker.ietf.org/doc/draft-ietf-idr-bgp-prefi=
x-sid/" target=3D"_blank"><span>https://datatracker.ietf.org/<wbr>doc/draft=
-ietf-idr-bgp-prefix-<wbr>sid/</span><span></span></a><span>
<br>
<br>
There are also htmlized versions available at: <br>
</span><a href=3D"https://tools.ietf.org/html/draft-ietf-idr-bgp-prefix-sid=
-16" target=3D"_blank"><span>https://tools.ietf.org/html/<wbr>draft-ietf-id=
r-bgp-prefix-sid-<wbr>16</span><span></span></a><span>
<br>
</span><a href=3D"https://datatracker.ietf.org/doc/html/draft-ietf-idr-bgp-=
prefix-sid-16" target=3D"_blank"><span>https://datatracker.ietf.org/<wbr>do=
c/html/draft-ietf-idr-bgp-<wbr>prefix-sid-16</span><span></span></a><span>
<br>
<br>
A diff from the previous version is available at: <br>
</span><a href=3D"https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-idr-bgp-pr=
efix-sid-16" target=3D"_blank"><span>https://www.ietf.org/rfcdiff?<wbr>url2=
=3Ddraft-ietf-idr-bgp-<wbr>prefix-sid-16</span><span></span></a><span>
<br>
<br>
<br>
Please note that it may take a couple of minutes from the time of submissio=
n <br>
until the htmlized version and diff are available at </span><a href=3D"http=
://tools.ietf.org" target=3D"_blank"><span>tools.ietf.org</span><span></spa=
n></a><span>.
<br>
<br>
Internet-Drafts are also available by anonymous FTP at: <br>
</span><a href=3D"ftp://ftp.ietf.org/internet-drafts/" target=3D"_blank"><s=
pan>ftp://ftp.ietf.org/internet-<wbr>drafts/</span><span></span></a><span>
<br>
<br>
______________________________<wbr>_________________ <br>
I-D-Announce mailing list <br>
</span><a href=3D"mailto:I-D-Announce@ietf.org" target=3D"_blank"><span>I-D=
-Announce@ietf.org</span><span></span></a><span>
<br>
</span><a href=3D"https://www.ietf.org/mailman/listinfo/i-d-announce" targe=
t=3D"_blank"><span>https://www.ietf.org/mailman/<wbr>listinfo/i-d-announce<=
/span><span></span></a><span>
<br>
Internet-Draft directories: </span><a href=3D"http://www.ietf.org/shadow.ht=
ml" target=3D"_blank"><span>http://www.ietf.org/shadow.<wbr>html</span><spa=
n></span></a><span>
<br>
or </span><a href=3D"ftp://ftp.ietf.org/ietf/1shadow-sites.txt" target=3D"_=
blank"><span>ftp://ftp.ietf.org/ietf/<wbr>1shadow-sites.txt</span><span></s=
pan></a><span>
<u></u><u></u></span></p>
</div>
</div>
</blockquote>
</div></div></div>
</div>

<br>______________________________<wbr>_________________<br>
Idr mailing list<br>
<a href=3D"mailto:Idr@ietf.org">Idr@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/idr" rel=3D"noreferrer" ta=
rget=3D"_blank">https://www.ietf.org/mailman/<wbr>listinfo/idr</a><br>
<br></blockquote></div><br></div>

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From: "Acee Lindem (acee)" <acee@cisco.com>
To: Tony Przygienda <tonysietf@gmail.com>
CC: Alvaro Retana <aretana.ietf@gmail.com>, "idr@ietf.org" <idr@ietf.org>, "idr-chairs@ietf.org" <idr-chairs@ietf.org>, Susan Hares <shares@ndzh.com>, "draft-ietf-idr-bgp-prefix-sid@ietf.org" <draft-ietf-idr-bgp-prefix-sid@ietf.org>
Thread-Topic: [Idr] Review Updates to draft-ietf-idr-bgp-prefix-sid
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--_004_790D778D19CF4A2E81DD547C69E2E7BFciscocom_--


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From: Robert Raszuk <robert@raszuk.net>
Date: Sat, 17 Feb 2018 22:45:18 +0100
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To: "Acee Lindem (acee)" <acee@cisco.com>
Cc: Tony Przygienda <tonysietf@gmail.com>, "idr@ietf.org" <idr@ietf.org>,  "draft-ietf-idr-bgp-prefix-sid@ietf.org" <draft-ietf-idr-bgp-prefix-sid@ietf.org>, Susan Hares <shares@ndzh.com>,  "idr-chairs@ietf.org" <idr-chairs@ietf.org>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/idr/Bn5O0oIcT2aNJZpCOrf139e0UmU>
Subject: Re: [Idr] Review Updates to draft-ietf-idr-bgp-prefix-sid
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Hi Acee,

Changes look good in general.

I would however keep reference to RFC4760 as  RFC3107 / RFC8277 are
actively using it :-).

Also since you removed the reference to SAFI 2/1 I would think the
paragraph describing it needs to be changes to say:

The BGP Prefix-SID attribute defined in this document can be attached
to prefixes from BGP labeled IPv4/IPv6 Unicast ([RFC8277
<https://tools.ietf.org/html/rfc8277>]).


instead of:


The BGP Prefix-SID attribute defined in this document can be attached
to prefixes from Address Family Identifier (AFI)/ Subsequent Address
Family Identifier (SAFI) combinations:

   Multiprotocol BGP labeled IPv4/IPv6 Unicast ([RFC8277
<https://tools.ietf.org/html/rfc8277>]).


Thx,

Robert.


On Sat, Feb 17, 2018 at 10:36 PM, Acee Lindem (acee) <acee@cisco.com> wrote=
:

> Hi Tony,
>
> Thanks for the support. I=E2=80=99ve attached the changes I=E2=80=99m pro=
posing =E2=80=93 it is
> actually a pretty straight forward extraction.
>
> Thanks,
> Acee
>
>
>
> *From: *Tony Przygienda <tonysietf@gmail.com>
> *Date: *Saturday, February 17, 2018 at 4:24 PM
> *To: *Acee Lindem <acee@cisco.com>
> *Cc: *Alvaro Retana <aretana.ietf@gmail.com>, IDR List <idr@ietf.org>, "
> idr-chairs@ietf.org" <idr-chairs@ietf.org>, Susan Hares <shares@ndzh.com>=
,
> "draft-ietf-idr-bgp-prefix-sid@ietf.org" <draft-ietf-idr-bgp-prefix-
> sid@ietf.org>
> *Subject: *Re: [Idr] Review Updates to draft-ietf-idr-bgp-prefix-sid
>
>
>
> strong +1 from having reviewed the draft in SG if it's really not
> implemented by anyone ... This will
>
> 1. simplify the draft significantly and improve its readability
>
> 2. remove bunch of weird corner cases I commented on that would need
> specification if v6 is in it
>
> Otherwise only serious comments pending was the clarity/correctness of th=
e
> forwarding section (but I admit I did NOT read the newest version publish=
ed
> so maybe they have been taken up) AFAIR ..
>
>
>
> On Sat, Feb 17, 2018 at 12:40 PM, Acee Lindem (acee) <acee@cisco.com>
> wrote:
>
> Dear Alvaro and IDR WG:
>
>
>
>      There is one more change we=E2=80=99d like to make to the draft that=
 requires
> WG approval. One revelation during the review process for this draft is
> that the SRv6 use case as currently documented isn=E2=80=99t really that =
compelling
> and there are some details that are unspecified. Other than validation, t=
he
> IPv6 SID TLV hasn=E2=80=99t been implemented. Consequently, we=E2=80=99d =
like to remove the
> IPv6 SID TLV and SRv6 dataplane specification from the draft. Are there a=
ny
> objections (other than the obvious one that it is very late to be making
> this change)?
>
>
>
> Here are a list of implementations and none have implemented the IPv6 SID=
:
>
> https://trac.ietf.org/trac/idr/wiki/draft-ietf-idr-bgp-
> prefix-sid%20implementations
>
>
>
> Note that the code point for the IPv6 SID would be deprecated since
> validation has been implemented in several implementations.
>
>
>
> If there are no objections, I could make this change next week and we
> could allow for an additional week for review.
>
>
>
> Thanks,
>
> Acee
>
>
>
>
>
>
>
>
>
> *From: *Alvaro Retana <aretana.ietf@gmail.com>
> *Date: *Thursday, February 15, 2018 at 8:37 AM
> *To: *IDR List <idr@ietf.org>
> *Cc: *"draft-ietf-idr-bgp-prefix-sid@ietf.org" <draft-ietf-idr-bgp-prefix=
-
> sid@ietf.org>, "idr-chairs@ietf.org" <idr-chairs@ietf.org>, Susan Hares <
> shares@ndzh.com>
> *Subject: *Review Updates to draft-ietf-idr-bgp-prefix-sid
> *Resent-From: *<alias-bounces@ietf.org>
> *Resent-To: *Stefano Previdi <stefano@previdi.net>, <cf@cisco.com>, Acee
> Lindem <acee@cisco.com>, Arjun Sreekantiah <arjunhrs@gmail.com>, <
> hannes@rtbrick.com>
> *Resent-Date: *Thursday, February 15, 2018 at 8:37 AM
>
>
>
> Dear idr WG:
>
>
>
> This draft has been through the WG and IESG process and it is waiting
> final approval for publication.
>
>
>
> During the process some changes have been made, some of them significant
> enough that I want to call out for your attention.  Please take a look at
> the latest version, specifically the updated text related to multiple
> prefixes/paths in sections 4.1 and 4.2.  For your convenience, I think th=
at
> the diff between -14 and -16 provides the clearest view:
>
>
>
> https://www.ietf.org/rfcdiff?url1=3Ddraft-ietf-idr-bgp-
> prefix-sid-14&url2=3Ddraft-ietf-idr-bgp-prefix-sid-16
>
>
>
> I think the changes are fine and that they don=E2=80=99t require the docu=
ment
> returning to the WG.  But I just want to give you the opportunity to look
> at them just in case.  If anyone has concerns, please reply to this
> message.  I plan on approving the document for publication by the end of
> next week (Feb/23).
>
>
>
> Thanks!
>
>
>
> Alvaro.
>
>
>
> On February 13, 2018 at 10:31:47 PM, internet-drafts@ietf.org (
> internet-drafts@ietf.org) wrote:
>
>
> A New Internet-Draft is available from the on-line Internet-Drafts
> directories.
> This draft is a work item of the Inter-Domain Routing WG of the IETF.
>
> Title : Segment Routing Prefix SID extensions for BGP
> Authors : Stefano Previdi
> Clarence Filsfils
> Acee Lindem
> Arjun Sreekantiah
> Hannes Gredler
> Filename : draft-ietf-idr-bgp-prefix-sid-16.txt
> Pages : 19
> Date : 2018-02-13
>
> Abstract:
> The Segment Routing (SR) architecture allows a node to steer a packet
> flow through any topological path and service chain by leveraging
> source routing. The ingress node prepends an SR header to a packet
> containing a set of segment identifiers (SID). Each SID represents a
> topological or a service-based instruction. Per-flow state is
> maintained only on the ingress node of the SR domain.
>
> This document defines an optional, transitive BGP attribute for
> announcing BGP Prefix Segment Identifiers (BGP Prefix-SID)
> information.
>
>
>
> The IETF datatracker status page for this draft is:
> https://datatracker.ietf.org/doc/draft-ietf-idr-bgp-prefix-sid/
>
> There are also htmlized versions available at:
> https://tools.ietf.org/html/draft-ietf-idr-bgp-prefix-sid-16
> https://datatracker.ietf.org/doc/html/draft-ietf-idr-bgp-prefix-sid-16
>
> A diff from the previous version is available at:
> https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-idr-bgp-prefix-sid-16
>
>
> Please note that it may take a couple of minutes from the time of
> submission
> until the htmlized version and diff are available at tools.ietf.org.
>
> Internet-Drafts are also available by anonymous FTP at:
> ftp://ftp.ietf.org/internet-drafts/
>
> _______________________________________________
> I-D-Announce mailing list
> I-D-Announce@ietf.org
> https://www.ietf.org/mailman/listinfo/i-d-announce
> Internet-Draft directories: http://www.ietf.org/shadow.html
> or ftp://ftp.ietf.org/ietf/1shadow-sites.txt
>
>
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr
>
>
>
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr
>
>

--f40304389254899c1a05656f603d
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small">Hi Acee,</div><div class=3D"gmail_defau=
lt" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></=
div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-=
serif;font-size:small">Changes look good in general.=C2=A0</div><div class=
=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-siz=
e:small"><br></div><div class=3D"gmail_default" style=3D"font-family:arial,=
helvetica,sans-serif;font-size:small">I would however keep reference to RFC=
4760 as=C2=A0 RFC3107 / RFC8277 are actively using it :-).=C2=A0</div><div =
class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;fon=
t-size:small"><br></div><div class=3D"gmail_default" style=3D"font-family:a=
rial,helvetica,sans-serif;font-size:small">Also since you removed the refer=
ence to SAFI 2/1 I would think the paragraph describing it needs to be chan=
ges to say:</div><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small">

<pre class=3D"gmail-newpage" style=3D"font-size:13.3333px;margin-top:0px;ma=
rgin-bottom:0px;color:rgb(0,0,0);font-style:normal;font-variant-ligatures:n=
ormal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-a=
lign:start;text-indent:0px;text-transform:none;word-spacing:0px;text-decora=
tion-style:initial;text-decoration-color:initial">The BGP Prefix-SID attrib=
ute defined in this document can be attached
to prefixes from BGP labeled IPv4/IPv6 Unicast ([<a href=3D"https://tools.i=
etf.org/html/rfc8277" title=3D"&quot;Using BGP to Bind MPLS Labels to Addre=
ss Prefixes&quot;">RFC8277</a>]).
</pre><pre class=3D"gmail-newpage" style=3D"font-size:13.3333px;margin-top:=
0px;margin-bottom:0px;color:rgb(0,0,0);font-style:normal;font-variant-ligat=
ures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;=
text-align:start;text-indent:0px;text-transform:none;word-spacing:0px;text-=
decoration-style:initial;text-decoration-color:initial"><br></pre><pre clas=
s=3D"gmail-newpage" style=3D"font-size:13.3333px;margin-top:0px;margin-bott=
om:0px;color:rgb(0,0,0);font-style:normal;font-variant-ligatures:normal;fon=
t-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:star=
t;text-indent:0px;text-transform:none;word-spacing:0px;text-decoration-styl=
e:initial;text-decoration-color:initial">instead of: </pre><pre class=3D"gm=
ail-newpage" style=3D"font-size:13.3333px;margin-top:0px;margin-bottom:0px;=
color:rgb(0,0,0);font-style:normal;font-variant-ligatures:normal;font-varia=
nt-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-=
indent:0px;text-transform:none;word-spacing:0px;text-decoration-style:initi=
al;text-decoration-color:initial"><br></pre><pre class=3D"gmail-newpage" st=
yle=3D"font-size:13.3333px;margin-top:0px;margin-bottom:0px;color:rgb(0,0,0=
);font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;=
font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text=
-transform:none;word-spacing:0px;text-decoration-style:initial;text-decorat=
ion-color:initial"><pre class=3D"gmail-newpage" style=3D"font-size:13.3333p=
x;margin-top:0px;margin-bottom:0px;color:rgb(0,0,0);font-style:normal;font-=
variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-sp=
acing:normal;text-align:start;text-indent:0px;text-transform:none;word-spac=
ing:0px;text-decoration-style:initial;text-decoration-color:initial">The BG=
P Prefix-SID attribute defined in this document can be attached
to prefixes from Address Family Identifier (AFI)/ Subsequent Address
Family Identifier (SAFI) combinations:

   Multiprotocol BGP labeled IPv4/IPv6 Unicast ([<a href=3D"https://tools.i=
etf.org/html/rfc8277" title=3D"&quot;Using BGP to Bind MPLS Labels to Addre=
ss Prefixes&quot;">RFC8277</a>]).</pre><pre class=3D"gmail-newpage" style=
=3D"font-size:13.3333px;margin-top:0px;margin-bottom:0px;color:rgb(0,0,0);f=
ont-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;fon=
t-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-tr=
ansform:none;word-spacing:0px;text-decoration-style:initial;text-decoration=
-color:initial"><br></pre><pre class=3D"gmail-newpage" style=3D"font-size:1=
3.3333px;margin-top:0px;margin-bottom:0px;color:rgb(0,0,0);font-style:norma=
l;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;le=
tter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;wo=
rd-spacing:0px;text-decoration-style:initial;text-decoration-color:initial"=
>Thx,<br></pre></pre></div><div class=3D"gmail_default" style=3D"font-famil=
y:arial,helvetica,sans-serif;font-size:small">Robert.</div><div class=3D"gm=
ail_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:smal=
l"><br></div></div><div class=3D"gmail_extra"><br><div class=3D"gmail_quote=
">On Sat, Feb 17, 2018 at 10:36 PM, Acee Lindem (acee) <span dir=3D"ltr">&l=
t;<a href=3D"mailto:acee@cisco.com" target=3D"_blank">acee@cisco.com</a>&gt=
;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 =
.8ex;border-left:1px #ccc solid;padding-left:1ex">





<div lang=3D"EN-US" link=3D"blue" vlink=3D"purple">
<div class=3D"m_-4395876633103843533WordSection1">
<p class=3D"MsoNormal">Hi Tony, <u></u><u></u></p>
<p class=3D"MsoNormal">Thanks for the support. I=E2=80=99ve attached the ch=
anges I=E2=80=99m proposing =E2=80=93 it is actually a pretty straight forw=
ard extraction.
<u></u><u></u></p>
<p class=3D"MsoNormal">Thanks,<br>
Acee <u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div style=3D"border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><b><span style=3D"font-si=
ze:12.0pt;color:black">From:
</span></b><span style=3D"font-size:12.0pt;color:black">Tony Przygienda &lt=
;<a href=3D"mailto:tonysietf@gmail.com" target=3D"_blank">tonysietf@gmail.c=
om</a>&gt;<br>
<b>Date: </b>Saturday, February 17, 2018 at 4:24 PM<br>
<b>To: </b>Acee Lindem &lt;<a href=3D"mailto:acee@cisco.com" target=3D"_bla=
nk">acee@cisco.com</a>&gt;<br>
<b>Cc: </b>Alvaro Retana &lt;<a href=3D"mailto:aretana.ietf@gmail.com" targ=
et=3D"_blank">aretana.ietf@gmail.com</a>&gt;, IDR List &lt;<a href=3D"mailt=
o:idr@ietf.org" target=3D"_blank">idr@ietf.org</a>&gt;, &quot;<a href=3D"ma=
ilto:idr-chairs@ietf.org" target=3D"_blank">idr-chairs@ietf.org</a>&quot; &=
lt;<a href=3D"mailto:idr-chairs@ietf.org" target=3D"_blank">idr-chairs@ietf=
.org</a>&gt;, Susan Hares &lt;<a href=3D"mailto:shares@ndzh.com" target=3D"=
_blank">shares@ndzh.com</a>&gt;, &quot;<a href=3D"mailto:draft-ietf-idr-bgp=
-prefix-sid@ietf.org" target=3D"_blank">draft-ietf-idr-bgp-prefix-<wbr>sid@=
ietf.org</a>&quot; &lt;<a href=3D"mailto:draft-ietf-idr-bgp-prefix-sid@ietf=
.org" target=3D"_blank">draft-ietf-idr-bgp-prefix-<wbr>sid@ietf.org</a>&gt;=
<span class=3D""><br>
<b>Subject: </b>Re: [Idr] Review Updates to draft-ietf-idr-bgp-prefix-sid<u=
></u><u></u></span></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><u></u>=C2=A0<u></u></p>
</div>
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"margin-right:0in;margin-bottom:12.0pt;margi=
n-left:.5in">
<a name=3D"m_-4395876633103843533__MailOriginalBody">strong +1 from having =
reviewed the draft in SG if it&#39;s really not implemented by anyone ... T=
his will<u></u><u></u></a></p>
</div><div><div class=3D"h5">
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span>1. simplify the dra=
ft significantly and improve its readability
<u></u><u></u></span></p>
</div></div></div><div><div class=3D"h5">
<p class=3D"MsoNormal" style=3D"margin-right:0in;margin-bottom:12.0pt;margi=
n-left:.5in">
<span>2. remove bunch of weird corner cases I commented on that would need =
specification if v6 is in it
<u></u><u></u></span></p>
</div></div></div><div><div class=3D"h5">
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span>Otherwise only seri=
ous comments pending was the clarity/correctness of the forwarding section =
(but I admit I did NOT read the newest version published so maybe they have
 been taken up) AFAIR .. <u></u><u></u></span></p>
</div></div></div><div><div class=3D"h5">
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><u></u>=C2=A0<u></u=
></span></p>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span>On Sat, Feb 17, 201=
8 at 12:40 PM, Acee Lindem (acee) &lt;</span><a href=3D"mailto:acee@cisco.c=
om" target=3D"_blank"><span>acee@cisco.com</span><span></span></a><span>&gt=
;
 wrote:<u></u><u></u></span></p>
<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>
<p class=3D"MsoNormal" style=3D"margin-left:.5in">
<span>Dear Alvaro and IDR WG: <u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in">
<span>=C2=A0<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in">
<span>=C2=A0=C2=A0=C2=A0=C2=A0 There is one more change we=E2=80=99d like t=
o make to the draft that requires WG approval. One revelation during the re=
view process for this draft is that the SRv6 use case as currently document=
ed isn=E2=80=99t really that
 compelling and there are some details that are unspecified. Other than val=
idation, the IPv6 SID TLV hasn=E2=80=99t been implemented. Consequently, we=
=E2=80=99d like to remove the IPv6 SID TLV and SRv6 dataplane specification=
 from the draft. Are there any objections (other
 than the obvious one that it is very late to be making this change)? <u></=
u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in">
<span>=C2=A0=C2=A0=C2=A0<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in">
<span>Here are a list of implementations and none have implemented the IPv6=
 SID:<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in">
<span></span><a href=3D"https://trac.ietf.org/trac/idr/wiki/draft-ietf-idr-=
bgp-prefix-sid%20implementations" target=3D"_blank"><span>https://trac.ietf=
.org/trac/<wbr>idr/wiki/draft-ietf-idr-bgp-<wbr>prefix-sid%20implementation=
s</span><span></span></a><span><u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in">
<span>=C2=A0<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in">
<span>Note that the code point for the IPv6 SID would be deprecated since v=
alidation has been implemented in several implementations. =C2=A0<u></u><u>=
</u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in">
<span>=C2=A0<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in">
<span>If there are no objections, I could make this change next week and we=
 could allow for an additional week for review.
<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in">
<span>=C2=A0<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in">
<span>Thanks,<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in">
<span>Acee <u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in">
<span>=C2=A0<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in">
<span>=C2=A0<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in">
<span>=C2=A0<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in">
<span>=C2=A0<u></u><u></u></span></p>
<div style=3D"border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal" style=3D"margin-left:1.0in">
<span><b><span style=3D"font-size:12.0pt;color:black">From:
</span></b></span><span><span style=3D"font-size:12.0pt;color:black">Alvaro=
 Retana &lt;</span></span><a href=3D"mailto:aretana.ietf@gmail.com" target=
=3D"_blank"><span><span style=3D"font-size:12.0pt">aretana.ietf@gmail.com</=
span></span><span></span></a><span><span style=3D"font-size:12.0pt;color:bl=
ack">&gt;<br>
<b>Date: </b>Thursday, February 15, 2018 at 8:37 AM<br>
<b>To: </b>IDR List &lt;</span></span><a href=3D"mailto:idr@ietf.org" targe=
t=3D"_blank"><span><span style=3D"font-size:12.0pt">idr@ietf.org</span></sp=
an><span></span></a><span><span style=3D"font-size:12.0pt;color:black">&gt;=
<br>
<b>Cc: </b>&quot;</span></span><a href=3D"mailto:draft-ietf-idr-bgp-prefix-=
sid@ietf.org" target=3D"_blank"><span><span style=3D"font-size:12.0pt">draf=
t-ietf-idr-bgp-prefix-<wbr>sid@ietf.org</span></span><span></span></a><span=
><span style=3D"font-size:12.0pt;color:black">&quot;
 &lt;</span></span><a href=3D"mailto:draft-ietf-idr-bgp-prefix-sid@ietf.org=
" target=3D"_blank"><span><span style=3D"font-size:12.0pt">draft-ietf-idr-b=
gp-prefix-<wbr>sid@ietf.org</span></span><span></span></a><span><span style=
=3D"font-size:12.0pt;color:black">&gt;,
 &quot;</span></span><a href=3D"mailto:idr-chairs@ietf.org" target=3D"_blan=
k"><span><span style=3D"font-size:12.0pt">idr-chairs@ietf.org</span></span>=
<span></span></a><span><span style=3D"font-size:12.0pt;color:black">&quot;
 &lt;</span></span><a href=3D"mailto:idr-chairs@ietf.org" target=3D"_blank"=
><span><span style=3D"font-size:12.0pt">idr-chairs@ietf.org</span></span><s=
pan></span></a><span><span style=3D"font-size:12.0pt;color:black">&gt;,
 Susan Hares &lt;</span></span><a href=3D"mailto:shares@ndzh.com" target=3D=
"_blank"><span><span style=3D"font-size:12.0pt">shares@ndzh.com</span></spa=
n><span></span></a><span><span style=3D"font-size:12.0pt;color:black">&gt;<=
br>
<b>Subject: </b>Review Updates to draft-ietf-idr-bgp-prefix-sid<br>
<b>Resent-From: </b>&lt;</span></span><a href=3D"mailto:alias-bounces@ietf.=
org" target=3D"_blank"><span><span style=3D"font-size:12.0pt">alias-bounces=
@ietf.org</span></span><span></span></a><span><span style=3D"font-size:12.0=
pt;color:black">&gt;<br>
<b>Resent-To: </b>Stefano Previdi &lt;</span></span><a href=3D"mailto:stefa=
no@previdi.net" target=3D"_blank"><span><span style=3D"font-size:12.0pt">st=
efano@previdi.net</span></span><span></span></a><span><span style=3D"font-s=
ize:12.0pt;color:black">&gt;,
 &lt;</span></span><a href=3D"mailto:cf@cisco.com" target=3D"_blank"><span>=
<span style=3D"font-size:12.0pt">cf@cisco.com</span></span><span></span></a=
><span><span style=3D"font-size:12.0pt;color:black">&gt;,
 Acee Lindem &lt;</span></span><a href=3D"mailto:acee@cisco.com" target=3D"=
_blank"><span><span style=3D"font-size:12.0pt">acee@cisco.com</span></span>=
<span></span></a><span><span style=3D"font-size:12.0pt;color:black">&gt;,
 Arjun Sreekantiah &lt;</span></span><a href=3D"mailto:arjunhrs@gmail.com" =
target=3D"_blank"><span><span style=3D"font-size:12.0pt">arjunhrs@gmail.com=
</span></span><span></span></a><span><span style=3D"font-size:12.0pt;color:=
black">&gt;,
 &lt;</span></span><a href=3D"mailto:hannes@rtbrick.com" target=3D"_blank">=
<span><span style=3D"font-size:12.0pt">hannes@rtbrick.com</span></span><spa=
n></span></a><span><span style=3D"font-size:12.0pt;color:black">&gt;<br>
<b>Resent-Date: </b>Thursday, February 15, 2018 at 8:37 AM</span><u></u><u>=
</u></span></p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:1.0in">
<span>=C2=A0<u></u><u></u></span></p>
</div>
<div id=3D"m_-4395876633103843533m_-1234778154279074976bloop_customfont">
<p class=3D"MsoNormal" style=3D"margin-left:1.0in">
<span><a name=3D"m_-4395876633103843533_m_-1234778154279074976__MailOrigina=
lBody"><span style=3D"font-size:10.0pt;font-family:Helvetica">Dear idr WG:<=
/span></a><u></u><u></u></span></p>
</div>
<div id=3D"m_-4395876633103843533m_-1234778154279074976bloop_customfont">
<p class=3D"MsoNormal" style=3D"margin-left:1.0in">
<span><span style=3D"font-size:10.0pt;font-family:Helvetica">=C2=A0</span><=
u></u><u></u></span></p>
</div>
<div id=3D"m_-4395876633103843533m_-1234778154279074976bloop_customfont">
<p class=3D"MsoNormal" style=3D"margin-left:1.0in">
<span><span style=3D"font-size:10.0pt;font-family:Helvetica">This draft has=
 been through the WG and IESG process and it is waiting final approval for =
publication.</span><u></u><u></u></span></p>
</div>
<div id=3D"m_-4395876633103843533m_-1234778154279074976bloop_customfont">
<p class=3D"MsoNormal" style=3D"margin-left:1.0in">
<span><span style=3D"font-size:10.0pt;font-family:Helvetica">=C2=A0</span><=
u></u><u></u></span></p>
</div>
<div id=3D"m_-4395876633103843533m_-1234778154279074976bloop_customfont">
<p class=3D"MsoNormal" style=3D"margin-left:1.0in">
<span><span style=3D"font-size:10.0pt;font-family:Helvetica">During the pro=
cess some changes have been made, some of them significant enough that I wa=
nt to call out for your attention.=C2=A0 Please take a look at the latest v=
ersion,
 specifically the updated text related to multiple prefixes/paths in sectio=
ns 4.1 and 4.2.=C2=A0 For your convenience, I think that the diff between -=
14 and -16 provides the clearest view:</span><u></u><u></u></span></p>
</div>
<div id=3D"m_-4395876633103843533m_-1234778154279074976bloop_customfont">
<p class=3D"MsoNormal" style=3D"margin-left:1.0in">
<span><span style=3D"font-size:10.0pt;font-family:Helvetica">=C2=A0</span><=
u></u><u></u></span></p>
</div>
<div id=3D"m_-4395876633103843533m_-1234778154279074976bloop_customfont">
<p class=3D"MsoNormal" style=3D"margin-left:1.0in">
<span></span><a href=3D"https://www.ietf.org/rfcdiff?url1=3Ddraft-ietf-idr-=
bgp-prefix-sid-14&amp;url2=3Ddraft-ietf-idr-bgp-prefix-sid-16" target=3D"_b=
lank"><span>https://www.ietf.org/rfcdiff?<wbr>url1=3Ddraft-ietf-idr-bgp-<wb=
r>prefix-sid-14&amp;url2=3Ddraft-ietf-<wbr>idr-bgp-prefix-sid-16</span><spa=
n></span></a><span>=C2=A0<u></u><u></u></span></p>
</div>
<div id=3D"m_-4395876633103843533m_-1234778154279074976bloop_customfont">
<p class=3D"MsoNormal" style=3D"margin-left:1.0in">
<span>=C2=A0<u></u><u></u></span></p>
</div>
<div id=3D"m_-4395876633103843533m_-1234778154279074976bloop_customfont">
<p class=3D"MsoNormal" style=3D"margin-left:1.0in">
<span>I think the changes are fine and that they don=E2=80=99t require the =
document returning to the WG.=C2=A0 But I just want to give you the opportu=
nity to look at them just in case.=C2=A0 If anyone has concerns, please rep=
ly to this
 message.=C2=A0 I plan on approving the document for publication by the end=
 of next week (Feb/23).<u></u><u></u></span></p>
</div>
<div id=3D"m_-4395876633103843533m_-1234778154279074976bloop_customfont">
<p class=3D"MsoNormal" style=3D"margin-left:1.0in">
<span>=C2=A0<u></u><u></u></span></p>
</div>
<div id=3D"m_-4395876633103843533m_-1234778154279074976bloop_customfont">
<p class=3D"MsoNormal" style=3D"margin-left:1.0in">
<span>Thanks!<u></u><u></u></span></p>
</div>
<div id=3D"m_-4395876633103843533m_-1234778154279074976bloop_customfont">
<p class=3D"MsoNormal" style=3D"margin-left:1.0in">
<span>=C2=A0<u></u><u></u></span></p>
</div>
<div id=3D"m_-4395876633103843533m_-1234778154279074976bloop_customfont">
<p class=3D"MsoNormal" style=3D"margin-left:1.0in">
<span>Alvaro.<u></u><u></u></span></p>
</div>
<p class=3D"MsoNormal" style=3D"margin-left:1.0in">
<span>=C2=A0<u></u><u></u></span></p>
<p class=3D"m_-4395876633103843533m-1234778154279074976airmailon" style=3D"=
margin-left:1.0in"><span>On February 13, 2018 at 10:31:47 PM,
</span><a href=3D"mailto:internet-drafts@ietf.org" target=3D"_blank"><span>=
internet-drafts@ietf.org</span><span></span></a><span> (</span><a href=3D"m=
ailto:internet-drafts@ietf.org" target=3D"_blank"><span>internet-drafts@iet=
f.org</span><span></span></a><span>)
 wrote:<u></u><u></u></span></p>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:1.0in">
<span><br>
A New Internet-Draft is available from the on-line Internet-Drafts director=
ies. <br>
This draft is a work item of the Inter-Domain Routing WG of the IETF. <br>
<br>
Title : Segment Routing Prefix SID extensions for BGP <br>
Authors : Stefano Previdi <br>
Clarence Filsfils <br>
Acee Lindem <br>
Arjun Sreekantiah <br>
Hannes Gredler <br>
Filename : draft-ietf-idr-bgp-prefix-sid-<wbr>16.txt <br>
Pages : 19 <br>
Date : 2018-02-13 <br>
<br>
Abstract: <br>
The Segment Routing (SR) architecture allows a node to steer a packet <br>
flow through any topological path and service chain by leveraging <br>
source routing. The ingress node prepends an SR header to a packet <br>
containing a set of segment identifiers (SID). Each SID represents a <br>
topological or a service-based instruction. Per-flow state is <br>
maintained only on the ingress node of the SR domain. <br>
<br>
This document defines an optional, transitive BGP attribute for <br>
announcing BGP Prefix Segment Identifiers (BGP Prefix-SID) <br>
information. <br>
<br>
<br>
<br>
The IETF datatracker status page for this draft is: <br>
</span><a href=3D"https://datatracker.ietf.org/doc/draft-ietf-idr-bgp-prefi=
x-sid/" target=3D"_blank"><span>https://datatracker.ietf.org/<wbr>doc/draft=
-ietf-idr-bgp-prefix-<wbr>sid/</span><span></span></a><span>
<br>
<br>
There are also htmlized versions available at: <br>
</span><a href=3D"https://tools.ietf.org/html/draft-ietf-idr-bgp-prefix-sid=
-16" target=3D"_blank"><span>https://tools.ietf.org/html/<wbr>draft-ietf-id=
r-bgp-prefix-sid-<wbr>16</span><span></span></a><span>
<br>
</span><a href=3D"https://datatracker.ietf.org/doc/html/draft-ietf-idr-bgp-=
prefix-sid-16" target=3D"_blank"><span>https://datatracker.ietf.org/<wbr>do=
c/html/draft-ietf-idr-bgp-<wbr>prefix-sid-16</span><span></span></a><span>
<br>
<br>
A diff from the previous version is available at: <br>
</span><a href=3D"https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-idr-bgp-pr=
efix-sid-16" target=3D"_blank"><span>https://www.ietf.org/rfcdiff?<wbr>url2=
=3Ddraft-ietf-idr-bgp-<wbr>prefix-sid-16</span><span></span></a><span>
<br>
<br>
<br>
Please note that it may take a couple of minutes from the time of submissio=
n <br>
until the htmlized version and diff are available at </span><a href=3D"http=
://tools.ietf.org" target=3D"_blank"><span>tools.ietf.org</span><span></spa=
n></a><span>.
<br>
<br>
Internet-Drafts are also available by anonymous FTP at: <br>
</span><a href=3D"ftp://ftp.ietf.org/internet-drafts/" target=3D"_blank"><s=
pan>ftp://ftp.ietf.org/internet-<wbr>drafts/</span><span></span></a><span>
<br>
<br>
______________________________<wbr>_________________ <br>
I-D-Announce mailing list <br>
</span><a href=3D"mailto:I-D-Announce@ietf.org" target=3D"_blank"><span>I-D=
-Announce@ietf.org</span><span></span></a><span>
<br>
</span><a href=3D"https://www.ietf.org/mailman/listinfo/i-d-announce" targe=
t=3D"_blank"><span>https://www.ietf.org/mailman/<wbr>listinfo/i-d-announce<=
/span><span></span></a><span>
<br>
Internet-Draft directories: </span><a href=3D"http://www.ietf.org/shadow.ht=
ml" target=3D"_blank"><span>http://www.ietf.org/shadow.<wbr>html</span><spa=
n></span></a><span>
<br>
or </span><a href=3D"ftp://ftp.ietf.org/ietf/1shadow-sites.txt" target=3D"_=
blank"><span>ftp://ftp.ietf.org/ietf/<wbr>1shadow-sites.txt</span><span></s=
pan></a><span>
<u></u><u></u></span></p>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"margin-right:0in;margin-bottom:12.0pt;margi=
n-left:.5in">
<span><br>
______________________________<wbr>_________________<br>
Idr mailing list<br>
</span><a href=3D"mailto:Idr@ietf.org" target=3D"_blank"><span>Idr@ietf.org=
</span><span></span></a><span><br>
</span><a href=3D"https://www.ietf.org/mailman/listinfo/idr" target=3D"_bla=
nk"><span>https://www.ietf.org/mailman/<wbr>listinfo/idr</span><span></span=
></a><span><u></u><u></u></span></p>
</blockquote>
</div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><u></u>=C2=A0<u></u=
></span></p>
</div>
</div></div></div>
</div>

<br>______________________________<wbr>_________________<br>
Idr mailing list<br>
<a href=3D"mailto:Idr@ietf.org">Idr@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/idr" rel=3D"noreferrer" ta=
rget=3D"_blank">https://www.ietf.org/mailman/<wbr>listinfo/idr</a><br>
<br></blockquote></div><br></div>

--f40304389254899c1a05656f603d--


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From: "Acee Lindem (acee)" <acee@cisco.com>
To: Robert Raszuk <robert@raszuk.net>
CC: Tony Przygienda <tonysietf@gmail.com>, "idr@ietf.org" <idr@ietf.org>, "draft-ietf-idr-bgp-prefix-sid@ietf.org" <draft-ietf-idr-bgp-prefix-sid@ietf.org>, Susan Hares <shares@ndzh.com>, "idr-chairs@ietf.org" <idr-chairs@ietf.org>
Thread-Topic: [Idr] Review Updates to draft-ietf-idr-bgp-prefix-sid
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Date: Sat, 17 Feb 2018 22:00:38 +0000
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Subject: Re: [Idr] Review Updates to draft-ietf-idr-bgp-prefix-sid
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From: Jeff Tantsura <jefftant.ietf@gmail.com>
Date: Sat, 17 Feb 2018 23:05:56 +0000
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To: "Acee Lindem (acee)" <acee@cisco.com>
Cc: Susan Hares <shares@ndzh.com>, Tony Przygienda <tonysietf@gmail.com>,  "draft-ietf-idr-bgp-prefix-sid@ietf.org" <draft-ietf-idr-bgp-prefix-sid@ietf.org>,  "idr-chairs@ietf.org" <idr-chairs@ietf.org>, "idr@ietf.org" <idr@ietf.org>
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Subject: Re: [Idr] Review Updates to draft-ietf-idr-bgp-prefix-sid
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Acee,

Changes look good to me!
Jeff

On Sat, Feb 17, 2018 at 13:37 Acee Lindem (acee) <acee@cisco.com> wrote:

> Hi Tony,
>
> Thanks for the support. I=E2=80=99ve attached the changes I=E2=80=99m pro=
posing =E2=80=93 it is
> actually a pretty straight forward extraction.
>
> Thanks,
> Acee
>
>
>
> *From: *Tony Przygienda <tonysietf@gmail.com>
> *Date: *Saturday, February 17, 2018 at 4:24 PM
> *To: *Acee Lindem <acee@cisco.com>
> *Cc: *Alvaro Retana <aretana.ietf@gmail.com>, IDR List <idr@ietf.org>, "
> idr-chairs@ietf.org" <idr-chairs@ietf.org>, Susan Hares <shares@ndzh.com>=
,
> "draft-ietf-idr-bgp-prefix-sid@ietf.org" <
> draft-ietf-idr-bgp-prefix-sid@ietf.org>
>
>
> *Subject: *Re: [Idr] Review Updates to draft-ietf-idr-bgp-prefix-sid
>
>
>
> strong +1 from having reviewed the draft in SG if it's really not
> implemented by anyone ... This will
>
> 1. simplify the draft significantly and improve its readability
>
> 2. remove bunch of weird corner cases I commented on that would need
> specification if v6 is in it
>
> Otherwise only serious comments pending was the clarity/correctness of th=
e
> forwarding section (but I admit I did NOT read the newest version publish=
ed
> so maybe they have been taken up) AFAIR ..
>
>
>
> On Sat, Feb 17, 2018 at 12:40 PM, Acee Lindem (acee) <acee@cisco.com>
> wrote:
>
> Dear Alvaro and IDR WG:
>
>
>
>      There is one more change we=E2=80=99d like to make to the draft that=
 requires
> WG approval. One revelation during the review process for this draft is
> that the SRv6 use case as currently documented isn=E2=80=99t really that =
compelling
> and there are some details that are unspecified. Other than validation, t=
he
> IPv6 SID TLV hasn=E2=80=99t been implemented. Consequently, we=E2=80=99d =
like to remove the
> IPv6 SID TLV and SRv6 dataplane specification from the draft. Are there a=
ny
> objections (other than the obvious one that it is very late to be making
> this change)?
>
>
>
> Here are a list of implementations and none have implemented the IPv6 SID=
:
>
>
> https://trac.ietf.org/trac/idr/wiki/draft-ietf-idr-bgp-prefix-sid%20imple=
mentations
>
>
>
> Note that the code point for the IPv6 SID would be deprecated since
> validation has been implemented in several implementations.
>
>
>
> If there are no objections, I could make this change next week and we
> could allow for an additional week for review.
>
>
>
> Thanks,
>
> Acee
>
>
>
>
>
>
>
>
>
> *From: *Alvaro Retana <aretana.ietf@gmail.com>
> *Date: *Thursday, February 15, 2018 at 8:37 AM
> *To: *IDR List <idr@ietf.org>
> *Cc: *"draft-ietf-idr-bgp-prefix-sid@ietf.org" <
> draft-ietf-idr-bgp-prefix-sid@ietf.org>, "idr-chairs@ietf.org" <
> idr-chairs@ietf.org>, Susan Hares <shares@ndzh.com>
> *Subject: *Review Updates to draft-ietf-idr-bgp-prefix-sid
> *Resent-From: *<alias-bounces@ietf.org>
> *Resent-To: *Stefano Previdi <stefano@previdi.net>, <cf@cisco.com>, Acee
> Lindem <acee@cisco.com>, Arjun Sreekantiah <arjunhrs@gmail.com>, <
> hannes@rtbrick.com>
> *Resent-Date: *Thursday, February 15, 2018 at 8:37 AM
>
>
>
> Dear idr WG:
>
>
>
> This draft has been through the WG and IESG process and it is waiting
> final approval for publication.
>
>
>
> During the process some changes have been made, some of them significant
> enough that I want to call out for your attention.  Please take a look at
> the latest version, specifically the updated text related to multiple
> prefixes/paths in sections 4.1 and 4.2.  For your convenience, I think th=
at
> the diff between -14 and -16 provides the clearest view:
>
>
>
>
> https://www.ietf.org/rfcdiff?url1=3Ddraft-ietf-idr-bgp-prefix-sid-14&url2=
=3Ddraft-ietf-idr-bgp-prefix-sid-16
>
>
>
>
> I think the changes are fine and that they don=E2=80=99t require the docu=
ment
> returning to the WG.  But I just want to give you the opportunity to look
> at them just in case.  If anyone has concerns, please reply to this
> message.  I plan on approving the document for publication by the end of
> next week (Feb/23).
>
>
>
> Thanks!
>
>
>
> Alvaro.
>
>
>
> On February 13, 2018 at 10:31:47 PM, internet-drafts@ietf.org (
> internet-drafts@ietf.org) wrote:
>
>
> A New Internet-Draft is available from the on-line Internet-Drafts
> directories.
> This draft is a work item of the Inter-Domain Routing WG of the IETF.
>
> Title : Segment Routing Prefix SID extensions for BGP
> Authors : Stefano Previdi
> Clarence Filsfils
> Acee Lindem
> Arjun Sreekantiah
> Hannes Gredler
> Filename : draft-ietf-idr-bgp-prefix-sid-16.txt
> Pages : 19
> Date : 2018-02-13
>
> Abstract:
> The Segment Routing (SR) architecture allows a node to steer a packet
> flow through any topological path and service chain by leveraging
> source routing. The ingress node prepends an SR header to a packet
> containing a set of segment identifiers (SID). Each SID represents a
> topological or a service-based instruction. Per-flow state is
> maintained only on the ingress node of the SR domain.
>
> This document defines an optional, transitive BGP attribute for
> announcing BGP Prefix Segment Identifiers (BGP Prefix-SID)
> information.
>
>
>
> The IETF datatracker status page for this draft is:
> https://datatracker.ietf.org/doc/draft-ietf-idr-bgp-prefix-sid/
>
> There are also htmlized versions available at:
> https://tools.ietf.org/html/draft-ietf-idr-bgp-prefix-sid-16
> https://datatracker.ietf.org/doc/html/draft-ietf-idr-bgp-prefix-sid-16
>
> A diff from the previous version is available at:
> https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-idr-bgp-prefix-sid-16
>
>
> Please note that it may take a couple of minutes from the time of
> submission
> until the htmlized version and diff are available at tools.ietf.org.
>
> Internet-Drafts are also available by anonymous FTP at:
> ftp://ftp.ietf.org/internet-drafts/
>
> _______________________________________________
> I-D-Announce mailing list
> I-D-Announce@ietf.org
> https://www.ietf.org/mailman/listinfo/i-d-announce
> Internet-Draft directories: http://www.ietf.org/shadow.html
> or ftp://ftp.ietf.org/ietf/1shadow-sites.txt
>
>
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr
>
>
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr
>

--001a113fbe787e05d70565708185
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div><div dir=3D"auto">Acee,</div><div dir=3D"auto"><br></div><div dir=3D"a=
uto">Changes look good to me!</div><div dir=3D"auto">Jeff</div><br><div cla=
ss=3D"gmail_quote"><div>On Sat, Feb 17, 2018 at 13:37 Acee Lindem (acee) &l=
t;<a href=3D"mailto:acee@cisco.com">acee@cisco.com</a>&gt; wrote:<br></div>=
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">





<div lang=3D"EN-US" link=3D"blue" vlink=3D"purple">
<div class=3D"m_5086320324803535612WordSection1">
<p class=3D"MsoNormal">Hi Tony, <u></u><u></u></p>
<p class=3D"MsoNormal">Thanks for the support. I=E2=80=99ve attached the ch=
anges I=E2=80=99m proposing =E2=80=93 it is actually a pretty straight forw=
ard extraction.
<u></u><u></u></p>
<p class=3D"MsoNormal">Thanks,<br>
Acee <u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div style=3D"border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><b><span style=3D"font-si=
ze:12.0pt;color:black">From:
</span></b><span style=3D"font-size:12.0pt;color:black">Tony Przygienda &lt=
;<a href=3D"mailto:tonysietf@gmail.com" target=3D"_blank">tonysietf@gmail.c=
om</a>&gt;<br>
<b>Date: </b>Saturday, February 17, 2018 at 4:24 PM<br>
<b>To: </b>Acee Lindem &lt;<a href=3D"mailto:acee@cisco.com" target=3D"_bla=
nk">acee@cisco.com</a>&gt;<br>
<b>Cc: </b>Alvaro Retana &lt;<a href=3D"mailto:aretana.ietf@gmail.com" targ=
et=3D"_blank">aretana.ietf@gmail.com</a>&gt;, IDR List &lt;<a href=3D"mailt=
o:idr@ietf.org" target=3D"_blank">idr@ietf.org</a>&gt;, &quot;<a href=3D"ma=
ilto:idr-chairs@ietf.org" target=3D"_blank">idr-chairs@ietf.org</a>&quot; &=
lt;<a href=3D"mailto:idr-chairs@ietf.org" target=3D"_blank">idr-chairs@ietf=
.org</a>&gt;, Susan Hares &lt;<a href=3D"mailto:shares@ndzh.com" target=3D"=
_blank">shares@ndzh.com</a>&gt;, &quot;<a href=3D"mailto:draft-ietf-idr-bgp=
-prefix-sid@ietf.org" target=3D"_blank">draft-ietf-idr-bgp-prefix-sid@ietf.=
org</a>&quot; &lt;<a href=3D"mailto:draft-ietf-idr-bgp-prefix-sid@ietf.org"=
 target=3D"_blank">draft-ietf-idr-bgp-prefix-sid@ietf.org</a>&gt;</span></p=
></div></div></div><div lang=3D"EN-US" link=3D"blue" vlink=3D"purple"><div =
class=3D"m_5086320324803535612WordSection1"><div style=3D"border:none;borde=
r-top:solid #b5c4df 1.0pt;padding:3.0pt 0in 0in 0in"><p class=3D"MsoNormal"=
 style=3D"margin-left:.5in"><span style=3D"font-size:12.0pt;color:black"><b=
r>
<b>Subject: </b>Re: [Idr] Review Updates to draft-ietf-idr-bgp-prefix-sid<u=
></u><u></u></span></p></div></div></div><div lang=3D"EN-US" link=3D"blue" =
vlink=3D"purple"><div class=3D"m_5086320324803535612WordSection1"><div styl=
e=3D"border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in 0in 0in">=
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span style=3D"font-size:=
12.0pt;color:black"></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><u></u>=C2=A0<u></u></p>
</div>
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"margin-right:0in;margin-bottom:12.0pt;margi=
n-left:.5in">
<a name=3D"m_5086320324803535612__MailOriginalBody">strong +1 from having r=
eviewed the draft in SG if it&#39;s really not implemented by anyone ... Th=
is will<u></u><u></u></a></p>
</div></div></div></div></div></div><div lang=3D"EN-US" link=3D"blue" vlink=
=3D"purple"><div class=3D"m_5086320324803535612WordSection1"><div><div><div=
>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span>1. simplify the dra=
ft significantly and improve its readability
<u></u><u></u></span></p>
</div></div></div></div></div><div lang=3D"EN-US" link=3D"blue" vlink=3D"pu=
rple"><div class=3D"m_5086320324803535612WordSection1"><div><div>
<p class=3D"MsoNormal" style=3D"margin-right:0in;margin-bottom:12.0pt;margi=
n-left:.5in">
<span>2. remove bunch of weird corner cases I commented on that would need =
specification if v6 is in it
<u></u><u></u></span></p>
</div></div></div></div><div lang=3D"EN-US" link=3D"blue" vlink=3D"purple">=
<div class=3D"m_5086320324803535612WordSection1"><div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span>Otherwise only seri=
ous comments pending was the clarity/correctness of the forwarding section =
(but I admit I did NOT read the newest version published so maybe they have
 been taken up) AFAIR .. <u></u><u></u></span></p>
</div></div></div><div lang=3D"EN-US" link=3D"blue" vlink=3D"purple"><div c=
lass=3D"m_5086320324803535612WordSection1">
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><u></u>=C2=A0<u></u=
></span></p>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span>On Sat, Feb 17, 201=
8 at 12:40 PM, Acee Lindem (acee) &lt;</span><a href=3D"mailto:acee@cisco.c=
om" target=3D"_blank"><span>acee@cisco.com</span><span></span></a><span>&gt=
;
 wrote:<u></u><u></u></span></p>
<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>
<p class=3D"MsoNormal" style=3D"margin-left:.5in">
<span>Dear Alvaro and IDR WG: <u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in">
<span>=C2=A0<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in">
<span>=C2=A0=C2=A0=C2=A0=C2=A0 There is one more change we=E2=80=99d like t=
o make to the draft that requires WG approval. One revelation during the re=
view process for this draft is that the SRv6 use case as currently document=
ed isn=E2=80=99t really that
 compelling and there are some details that are unspecified. Other than val=
idation, the IPv6 SID TLV hasn=E2=80=99t been implemented. Consequently, we=
=E2=80=99d like to remove the IPv6 SID TLV and SRv6 dataplane specification=
 from the draft. Are there any objections (other
 than the obvious one that it is very late to be making this change)? <u></=
u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in">
<span>=C2=A0=C2=A0=C2=A0<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in">
<span>Here are a list of implementations and none have implemented the IPv6=
 SID:<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in">
<span></span><a href=3D"https://trac.ietf.org/trac/idr/wiki/draft-ietf-idr-=
bgp-prefix-sid%20implementations" target=3D"_blank"><span>https://trac.ietf=
.org/trac/idr/wiki/draft-ietf-idr-bgp-prefix-sid%20implementations</span><s=
pan></span></a><span><u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in">
<span>=C2=A0<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in">
<span>Note that the code point for the IPv6 SID would be deprecated since v=
alidation has been implemented in several implementations. =C2=A0<u></u><u>=
</u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in">
<span>=C2=A0<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in">
<span>If there are no objections, I could make this change next week and we=
 could allow for an additional week for review.
<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in">
<span>=C2=A0<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in">
<span>Thanks,<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in">
<span>Acee <u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in">
<span>=C2=A0<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in">
<span>=C2=A0<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in">
<span>=C2=A0<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in">
<span>=C2=A0<u></u><u></u></span></p>
<div style=3D"border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal" style=3D"margin-left:1.0in">
<span><b><span style=3D"font-size:12.0pt;color:black">From:
</span></b></span><span><span style=3D"font-size:12.0pt;color:black">Alvaro=
 Retana &lt;</span></span><a href=3D"mailto:aretana.ietf@gmail.com" target=
=3D"_blank"><span><span style=3D"font-size:12.0pt">aretana.ietf@gmail.com</=
span></span><span></span></a><span><span style=3D"font-size:12.0pt;color:bl=
ack">&gt;<br>
<b>Date: </b>Thursday, February 15, 2018 at 8:37 AM<br>
<b>To: </b>IDR List &lt;</span></span><a href=3D"mailto:idr@ietf.org" targe=
t=3D"_blank"><span><span style=3D"font-size:12.0pt">idr@ietf.org</span></sp=
an><span></span></a><span><span style=3D"font-size:12.0pt;color:black">&gt;=
<br>
<b>Cc: </b>&quot;</span></span><a href=3D"mailto:draft-ietf-idr-bgp-prefix-=
sid@ietf.org" target=3D"_blank"><span><span style=3D"font-size:12.0pt">draf=
t-ietf-idr-bgp-prefix-sid@ietf.org</span></span><span></span></a><span><spa=
n style=3D"font-size:12.0pt;color:black">&quot;
 &lt;</span></span><a href=3D"mailto:draft-ietf-idr-bgp-prefix-sid@ietf.org=
" target=3D"_blank"><span><span style=3D"font-size:12.0pt">draft-ietf-idr-b=
gp-prefix-sid@ietf.org</span></span><span></span></a><span><span style=3D"f=
ont-size:12.0pt;color:black">&gt;,
 &quot;</span></span><a href=3D"mailto:idr-chairs@ietf.org" target=3D"_blan=
k"><span><span style=3D"font-size:12.0pt">idr-chairs@ietf.org</span></span>=
<span></span></a><span><span style=3D"font-size:12.0pt;color:black">&quot;
 &lt;</span></span><a href=3D"mailto:idr-chairs@ietf.org" target=3D"_blank"=
><span><span style=3D"font-size:12.0pt">idr-chairs@ietf.org</span></span><s=
pan></span></a><span><span style=3D"font-size:12.0pt;color:black">&gt;,
 Susan Hares &lt;</span></span><a href=3D"mailto:shares@ndzh.com" target=3D=
"_blank"><span><span style=3D"font-size:12.0pt">shares@ndzh.com</span></spa=
n><span></span></a><span><span style=3D"font-size:12.0pt;color:black">&gt;<=
br>
<b>Subject: </b>Review Updates to draft-ietf-idr-bgp-prefix-sid<br>
<b>Resent-From: </b>&lt;</span></span><a href=3D"mailto:alias-bounces@ietf.=
org" target=3D"_blank"><span><span style=3D"font-size:12.0pt">alias-bounces=
@ietf.org</span></span><span></span></a><span><span style=3D"font-size:12.0=
pt;color:black">&gt;<br>
<b>Resent-To: </b>Stefano Previdi &lt;</span></span><a href=3D"mailto:stefa=
no@previdi.net" target=3D"_blank"><span><span style=3D"font-size:12.0pt">st=
efano@previdi.net</span></span><span></span></a><span><span style=3D"font-s=
ize:12.0pt;color:black">&gt;,
 &lt;</span></span><a href=3D"mailto:cf@cisco.com" target=3D"_blank"><span>=
<span style=3D"font-size:12.0pt">cf@cisco.com</span></span><span></span></a=
><span><span style=3D"font-size:12.0pt;color:black">&gt;,
 Acee Lindem &lt;</span></span><a href=3D"mailto:acee@cisco.com" target=3D"=
_blank"><span><span style=3D"font-size:12.0pt">acee@cisco.com</span></span>=
<span></span></a><span><span style=3D"font-size:12.0pt;color:black">&gt;,
 Arjun Sreekantiah &lt;</span></span><a href=3D"mailto:arjunhrs@gmail.com" =
target=3D"_blank"><span><span style=3D"font-size:12.0pt">arjunhrs@gmail.com=
</span></span><span></span></a><span><span style=3D"font-size:12.0pt;color:=
black">&gt;,
 &lt;</span></span><a href=3D"mailto:hannes@rtbrick.com" target=3D"_blank">=
<span><span style=3D"font-size:12.0pt">hannes@rtbrick.com</span></span><spa=
n></span></a><span><span style=3D"font-size:12.0pt;color:black">&gt;<br>
<b>Resent-Date: </b>Thursday, February 15, 2018 at 8:37 AM</span><u></u><u>=
</u></span></p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:1.0in">
<span>=C2=A0<u></u><u></u></span></p>
</div>
<div id=3D"m_5086320324803535612m_-1234778154279074976bloop_customfont">
<p class=3D"MsoNormal" style=3D"margin-left:1.0in">
<span><a name=3D"m_5086320324803535612_m_-1234778154279074976__MailOriginal=
Body"><span style=3D"font-size:10.0pt;font-family:Helvetica">Dear idr WG:</=
span></a><u></u><u></u></span></p>
</div>
<div id=3D"m_5086320324803535612m_-1234778154279074976bloop_customfont">
<p class=3D"MsoNormal" style=3D"margin-left:1.0in">
<span><span style=3D"font-size:10.0pt;font-family:Helvetica">=C2=A0</span><=
u></u><u></u></span></p>
</div>
<div id=3D"m_5086320324803535612m_-1234778154279074976bloop_customfont">
<p class=3D"MsoNormal" style=3D"margin-left:1.0in">
<span><span style=3D"font-size:10.0pt;font-family:Helvetica">This draft has=
 been through the WG and IESG process and it is waiting final approval for =
publication.</span><u></u><u></u></span></p>
</div>
<div id=3D"m_5086320324803535612m_-1234778154279074976bloop_customfont">
<p class=3D"MsoNormal" style=3D"margin-left:1.0in">
<span><span style=3D"font-size:10.0pt;font-family:Helvetica">=C2=A0</span><=
u></u><u></u></span></p>
</div>
<div id=3D"m_5086320324803535612m_-1234778154279074976bloop_customfont">
<p class=3D"MsoNormal" style=3D"margin-left:1.0in">
<span><span style=3D"font-size:10.0pt;font-family:Helvetica">During the pro=
cess some changes have been made, some of them significant enough that I wa=
nt to call out for your attention.=C2=A0 Please take a look at the latest v=
ersion,
 specifically the updated text related to multiple prefixes/paths in sectio=
ns 4.1 and 4.2.=C2=A0 For your convenience, I think that the diff between -=
14 and -16 provides the clearest view:</span><u></u><u></u></span></p>
</div>
<div id=3D"m_5086320324803535612m_-1234778154279074976bloop_customfont">
<p class=3D"MsoNormal" style=3D"margin-left:1.0in">
<span><span style=3D"font-size:10.0pt;font-family:Helvetica">=C2=A0</span><=
u></u><u></u></span></p>
</div>
<div id=3D"m_5086320324803535612m_-1234778154279074976bloop_customfont">
<p class=3D"MsoNormal" style=3D"margin-left:1.0in">
<span></span><a href=3D"https://www.ietf.org/rfcdiff?url1=3Ddraft-ietf-idr-=
bgp-prefix-sid-14&amp;url2=3Ddraft-ietf-idr-bgp-prefix-sid-16" target=3D"_b=
lank"><span>https://www.ietf.org/rfcdiff?url1=3Ddraft-ietf-idr-bgp-prefix-s=
id-14&amp;url2=3Ddraft-ietf-idr-bgp-prefix-sid-16</span><span></span></a><s=
pan>=C2=A0<u></u><u></u></span></p>
</div>
<div id=3D"m_5086320324803535612m_-1234778154279074976bloop_customfont">
<p class=3D"MsoNormal" style=3D"margin-left:1.0in">
<span>=C2=A0<u></u><u></u></span></p>
</div>
<div id=3D"m_5086320324803535612m_-1234778154279074976bloop_customfont">
<p class=3D"MsoNormal" style=3D"margin-left:1.0in">
<span>I think the changes are fine and that they don=E2=80=99t require the =
document returning to the WG.=C2=A0 But I just want to give you the opportu=
nity to look at them just in case.=C2=A0 If anyone has concerns, please rep=
ly to this
 message.=C2=A0 I plan on approving the document for publication by the end=
 of next week (Feb/23).<u></u><u></u></span></p>
</div>
<div id=3D"m_5086320324803535612m_-1234778154279074976bloop_customfont">
<p class=3D"MsoNormal" style=3D"margin-left:1.0in">
<span>=C2=A0<u></u><u></u></span></p>
</div>
<div id=3D"m_5086320324803535612m_-1234778154279074976bloop_customfont">
<p class=3D"MsoNormal" style=3D"margin-left:1.0in">
<span>Thanks!<u></u><u></u></span></p>
</div>
<div id=3D"m_5086320324803535612m_-1234778154279074976bloop_customfont">
<p class=3D"MsoNormal" style=3D"margin-left:1.0in">
<span>=C2=A0<u></u><u></u></span></p>
</div>
<div id=3D"m_5086320324803535612m_-1234778154279074976bloop_customfont">
<p class=3D"MsoNormal" style=3D"margin-left:1.0in">
<span>Alvaro.<u></u><u></u></span></p>
</div>
<p class=3D"MsoNormal" style=3D"margin-left:1.0in">
<span>=C2=A0<u></u><u></u></span></p>
<p class=3D"m_5086320324803535612m-1234778154279074976airmailon" style=3D"m=
argin-left:1.0in"><span>On February 13, 2018 at 10:31:47 PM,
</span><a href=3D"mailto:internet-drafts@ietf.org" target=3D"_blank"><span>=
internet-drafts@ietf.org</span><span></span></a><span> (</span><a href=3D"m=
ailto:internet-drafts@ietf.org" target=3D"_blank"><span>internet-drafts@iet=
f.org</span><span></span></a><span>)
 wrote:<u></u><u></u></span></p>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:1.0in">
<span><br>
A New Internet-Draft is available from the on-line Internet-Drafts director=
ies. <br>
This draft is a work item of the Inter-Domain Routing WG of the IETF. <br>
<br>
Title : Segment Routing Prefix SID extensions for BGP <br>
Authors : Stefano Previdi <br>
Clarence Filsfils <br>
Acee Lindem <br>
Arjun Sreekantiah <br>
Hannes Gredler <br>
Filename : draft-ietf-idr-bgp-prefix-sid-16.txt <br>
Pages : 19 <br>
Date : 2018-02-13 <br>
<br>
Abstract: <br>
The Segment Routing (SR) architecture allows a node to steer a packet <br>
flow through any topological path and service chain by leveraging <br>
source routing. The ingress node prepends an SR header to a packet <br>
containing a set of segment identifiers (SID). Each SID represents a <br>
topological or a service-based instruction. Per-flow state is <br>
maintained only on the ingress node of the SR domain. <br>
<br>
This document defines an optional, transitive BGP attribute for <br>
announcing BGP Prefix Segment Identifiers (BGP Prefix-SID) <br>
information. <br>
<br>
<br>
<br>
The IETF datatracker status page for this draft is: <br>
</span><a href=3D"https://datatracker.ietf.org/doc/draft-ietf-idr-bgp-prefi=
x-sid/" target=3D"_blank"><span>https://datatracker.ietf.org/doc/draft-ietf=
-idr-bgp-prefix-sid/</span><span></span></a><span>
<br>
<br>
There are also htmlized versions available at: <br>
</span><a href=3D"https://tools.ietf.org/html/draft-ietf-idr-bgp-prefix-sid=
-16" target=3D"_blank"><span>https://tools.ietf.org/html/draft-ietf-idr-bgp=
-prefix-sid-16</span><span></span></a><span>
<br>
</span><a href=3D"https://datatracker.ietf.org/doc/html/draft-ietf-idr-bgp-=
prefix-sid-16" target=3D"_blank"><span>https://datatracker.ietf.org/doc/htm=
l/draft-ietf-idr-bgp-prefix-sid-16</span><span></span></a><span>
<br>
<br>
A diff from the previous version is available at: <br>
</span><a href=3D"https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-idr-bgp-pr=
efix-sid-16" target=3D"_blank"><span>https://www.ietf.org/rfcdiff?url2=3Ddr=
aft-ietf-idr-bgp-prefix-sid-16</span><span></span></a><span>
<br>
<br>
<br>
Please note that it may take a couple of minutes from the time of submissio=
n <br>
until the htmlized version and diff are available at </span><a href=3D"http=
://tools.ietf.org" target=3D"_blank"><span>tools.ietf.org</span><span></spa=
n></a><span>.
<br>
<br>
Internet-Drafts are also available by anonymous FTP at: <br>
</span><a href=3D"ftp://ftp.ietf.org/internet-drafts/" target=3D"_blank"><s=
pan>ftp://ftp.ietf.org/internet-drafts/</span><span></span></a><span>
<br>
<br>
_______________________________________________ <br>
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Internet-Draft directories: </span><a href=3D"http://www.ietf.org/shadow.ht=
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<br>
or </span><a href=3D"ftp://ftp.ietf.org/ietf/1shadow-sites.txt" target=3D"_=
blank"><span>ftp://ftp.ietf.org/ietf/1shadow-sites.txt</span><span></span><=
/a><span>
<u></u><u></u></span></p>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"margin-right:0in;margin-bottom:12.0pt;margi=
n-left:.5in">
<span><br>
_______________________________________________<br>
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</blockquote>
</div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><u></u>=C2=A0<u></u=
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</div>
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Subject: Re: [Idr] Review Updates to draft-ietf-idr-bgp-prefix-sid
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--f403045ea08eb745f405657a7087
Content-Type: text/plain; charset="UTF-8"

Hi Acee,

Since we are at the open surgery of this draft there is one more point
which did not got resolved during our offline discussion. Feedback from WG
is welcome here.

The draft RECOMMENDS the following procedure in case of a conflict:

... it is RECOMMENDED that the first prefix using the label index is selected.


In BGP there is no guarantee about ordered delivery of BGP prefixes.  It
may work such in some specific topologies but not in any arbitrary one. So
if we recommend to pick one prefix on R1 and different prefix on R2 and
install in forwarding the same SID for those I am afraid the data plane
will get quite severely messed up and even finding it during
troubleshooting will be quite hard.

Also as pointed out already MPLS anycast SID may on purpose use the same
label across nodes according to draft-ietf-spring-mpls-anycast-segments-02.
Now if we want to accomplish the same in BGP we would need to advertise
different prefixes with the same SID (in MPLS-SR index). the above
paragraph does prevents that. Note that adding and advertising the _same_
prefix from different nodes will not work as BGP speakers may pick only one
(best path) and use it for forwarding. IBGP or EBGP multipath may not
always be enabled/use same set.

The crux of the issue when advertising SIDs in BGP is not so much about
prefixes, but their next hops which unfortunately the draft does not even
mention once.

Kind regards,
Robert.

--f403045ea08eb745f405657a7087
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small">Hi Acee,</div><div class=3D"gmail_defau=
lt" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></=
div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-=
serif;font-size:small">Since we are at the open surgery of this draft there=
 is one more point which did not got resolved during our offline discussion=
. Feedback from WG is welcome here.<br></div><div class=3D"gmail_default" s=
tyle=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></div><=
div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif=
;font-size:small">The draft RECOMMENDS the following procedure in case of a=
 conflict:=C2=A0</div><div class=3D"gmail_default" style=3D"font-family:ari=
al,helvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_defa=
ult" style=3D"font-family:arial,helvetica,sans-serif;font-size:small">

<pre class=3D"gmail-newpage" style=3D"font-size:13.3333px;margin-top:0px;ma=
rgin-bottom:0px;color:rgb(0,0,0);font-style:normal;font-variant-ligatures:n=
ormal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-a=
lign:start;text-indent:0px;text-transform:none;word-spacing:0px;text-decora=
tion-style:initial;text-decoration-color:initial">... it is RECOMMENDED tha=
t the first prefix using the label index is selected.</pre>

<br></div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica=
,sans-serif;font-size:small">

<span style=3D"color:rgb(34,34,34);font-family:arial,helvetica,sans-serif;f=
ont-size:small;font-style:normal;font-variant-ligatures:normal;font-variant=
-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-in=
dent:0px;text-transform:none;white-space:normal;word-spacing:0px;background=
-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color=
:initial;float:none;display:inline">In BGP there is no guarantee about orde=
red delivery of BGP prefixes.=C2=A0</span>=C2=A0It may work such in some sp=
ecific topologies but not in any arbitrary one. So if we recommend to pick =
one prefix on R1 and different prefix on R2 and install in forwarding the s=
ame SID for those I am afraid the data plane will get quite severely messed=
 up and even finding it during troubleshooting will be quite hard.=C2=A0<br=
></div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sa=
ns-serif;font-size:small"><br></div><div class=3D"gmail_default" style=3D"f=
ont-family:arial,helvetica,sans-serif;font-size:small">Also as pointed out =
already MPLS anycast SID may on purpose use the same label across nodes acc=
ording to=C2=A0draft-ietf-spring-mpls-anycast-segments-02. Now if we want t=
o accomplish the same in BGP we would need to advertise different prefixes =
with the same SID (in MPLS-SR index). the above paragraph does prevents tha=
t. Note that adding and advertising the _same_ prefix from different nodes =
will not work as BGP speakers may pick only one (best path) and use it for =
forwarding. IBGP or EBGP multipath may not always be enabled/use same set.<=
/div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans=
-serif;font-size:small"><br></div><div class=3D"gmail_default" style=3D"fon=
t-family:arial,helvetica,sans-serif;font-size:small">The crux of the issue =
when advertising SIDs in BGP is not so much about prefixes, but their next =
hops which unfortunately the draft does not even mention once.</div><div cl=
ass=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-=
size:small"><br></div><div class=3D"gmail_default" style=3D"font-family:ari=
al,helvetica,sans-serif;font-size:small">Kind regards,</div><div class=3D"g=
mail_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:sma=
ll">Robert.=C2=A0</div><div class=3D"gmail_default" style=3D"font-family:ar=
ial,helvetica,sans-serif;font-size:small"><br></div></div>

--f403045ea08eb745f405657a7087--


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From: "Ketan Talaulikar (ketant)" <ketant@cisco.com>
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CC: "idr@ietf.org" <idr@ietf.org>
Thread-Topic: [Idr] Review Updates to draft-ietf-idr-bgp-prefix-sid
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From: "Acee Lindem (acee)" <acee@cisco.com>
To: Robert Raszuk <robert@raszuk.net>
CC: "idr@ietf.org" <idr@ietf.org>
Thread-Topic: [Idr] Review Updates to draft-ietf-idr-bgp-prefix-sid
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Date: Sun, 18 Feb 2018 12:38:00 +0000
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Subject: Re: [Idr] Review Updates to draft-ietf-idr-bgp-prefix-sid
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Robert and Acee:

=20

If we do =E2=80=9Copen surgery=E2=80=9D, this document will need to go =
back through the process (WG LC, IETF LC, and IESG Review).=20

=20

Sue Hares

IDR co-chiar

=20

From: Idr [mailto:idr-bounces@ietf.org] On Behalf Of Robert Raszuk
Sent: Sunday, February 18, 2018 5:57 AM
To: Acee Lindem (acee)
Cc: idr@ietf.org
Subject: Re: [Idr] Review Updates to draft-ietf-idr-bgp-prefix-sid

=20

Hi Acee,

=20

Since we are at the open surgery of this draft there is one more point =
which did not got resolved during our offline discussion. Feedback from =
WG is welcome here.

=20

The draft RECOMMENDS the following procedure in case of a conflict:=20

=20

... it is RECOMMENDED that the first prefix using the label index is =
selected.

=20

In BGP there is no guarantee about ordered delivery of BGP prefixes.  It =
may work such in some specific topologies but not in any arbitrary one. =
So if we recommend to pick one prefix on R1 and different prefix on R2 =
and install in forwarding the same SID for those I am afraid the data =
plane will get quite severely messed up and even finding it during =
troubleshooting will be quite hard.=20

=20

Also as pointed out already MPLS anycast SID may on purpose use the same =
label across nodes according to =
draft-ietf-spring-mpls-anycast-segments-02. Now if we want to accomplish =
the same in BGP we would need to advertise different prefixes with the =
same SID (in MPLS-SR index). the above paragraph does prevents that. =
Note that adding and advertising the _same_ prefix from different nodes =
will not work as BGP speakers may pick only one (best path) and use it =
for forwarding. IBGP or EBGP multipath may not always be enabled/use =
same set.

=20

The crux of the issue when advertising SIDs in BGP is not so much about =
prefixes, but their next hops which unfortunately the draft does not =
even mention once.

=20

Kind regards,

Robert.=20

=20


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	margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
	{page:WordSection1;}
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<o:shapedefaults v:ext=3D"edit" spidmax=3D"1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext=3D"edit">
<o:idmap v:ext=3D"edit" data=3D"1" />
</o:shapelayout></xml><![endif]--></head><body lang=3DEN-US link=3Dblue =
vlink=3Dpurple><div class=3DWordSection1><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Robert and Acee:<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>If we do =E2=80=9Copen surgery=E2=80=9D, this document will need to =
go back through the process (WG LC, IETF LC, and IESG Review). =
<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Sue Hares<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>IDR co-chiar<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><b><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span>=
</b><span style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'> =
Idr [mailto:idr-bounces@ietf.org] <b>On Behalf Of </b>Robert =
Raszuk<br><b>Sent:</b> Sunday, February 18, 2018 5:57 AM<br><b>To:</b> =
Acee Lindem (acee)<br><b>Cc:</b> idr@ietf.org<br><b>Subject:</b> Re: =
[Idr] Review Updates to =
draft-ietf-idr-bgp-prefix-sid<o:p></o:p></span></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><div><div><p =
class=3DMsoNormal><span style=3D'font-family:"Arial","sans-serif"'>Hi =
Acee,<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-family:"Arial","sans-serif"'><o:p>&nbsp;</o:p></span></p></=
div><div><p class=3DMsoNormal><span =
style=3D'font-family:"Arial","sans-serif"'>Since we are at the open =
surgery of this draft there is one more point which did not got resolved =
during our offline discussion. Feedback from WG is welcome =
here.<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-family:"Arial","sans-serif"'><o:p>&nbsp;</o:p></span></p></=
div><div><p class=3DMsoNormal><span =
style=3D'font-family:"Arial","sans-serif"'>The draft RECOMMENDS the =
following procedure in case of a =
conflict:&nbsp;<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
style=3D'font-family:"Arial","sans-serif"'><o:p>&nbsp;</o:p></span></p></=
div><div><pre =
style=3D'font-variant-ligatures:normal;font-variant-caps:normal;text-alig=
n:start;text-decoration-style:initial;text-decoration-color:initial;word-=
spacing:0px'><span style=3D'color:black'>... it is RECOMMENDED that the =
first prefix using the label index is =
selected.<o:p></o:p></span></pre><p class=3DMsoNormal><span =
style=3D'font-family:"Arial","sans-serif"'><o:p>&nbsp;</o:p></span></p></=
div><div><p class=3DMsoNormal><span =
style=3D'font-family:"Arial","sans-serif";color:#222222;background:white'=
>In BGP there is no guarantee about ordered delivery of BGP =
prefixes.&nbsp;</span><span =
style=3D'font-family:"Arial","sans-serif"'>&nbsp;It may work such in =
some specific topologies but not in any arbitrary one. So if we =
recommend to pick one prefix on R1 and different prefix on R2 and =
install in forwarding the same SID for those I am afraid the data plane =
will get quite severely messed up and even finding it during =
troubleshooting will be quite =
hard.&nbsp;<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-family:"Arial","sans-serif"'><o:p>&nbsp;</o:p></span></p></=
div><div><p class=3DMsoNormal><span =
style=3D'font-family:"Arial","sans-serif"'>Also as pointed out already =
MPLS anycast SID may on purpose use the same label across nodes =
according to&nbsp;draft-ietf-spring-mpls-anycast-segments-02. Now if we =
want to accomplish the same in BGP we would need to advertise different =
prefixes with the same SID (in MPLS-SR index). the above paragraph does =
prevents that. Note that adding and advertising the _same_ prefix from =
different nodes will not work as BGP speakers may pick only one (best =
path) and use it for forwarding. IBGP or EBGP multipath may not always =
be enabled/use same set.<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
style=3D'font-family:"Arial","sans-serif"'><o:p>&nbsp;</o:p></span></p></=
div><div><p class=3DMsoNormal><span =
style=3D'font-family:"Arial","sans-serif"'>The crux of the issue when =
advertising SIDs in BGP is not so much about prefixes, but their next =
hops which unfortunately the draft does not even mention =
once.<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-family:"Arial","sans-serif"'><o:p>&nbsp;</o:p></span></p></=
div><div><p class=3DMsoNormal><span =
style=3D'font-family:"Arial","sans-serif"'>Kind =
regards,<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-family:"Arial","sans-serif"'>Robert.&nbsp;<o:p></o:p></span=
></p></div><div><p class=3DMsoNormal><span =
style=3D'font-family:"Arial","sans-serif"'><o:p>&nbsp;</o:p></span></p></=
div></div></div></body></html>
------=_NextPart_000_0050_01D3A8A6.CA4ABED0--


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From: Robert Raszuk <robert@raszuk.net>
Date: Sun, 18 Feb 2018 16:54:39 +0100
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To: "Acee Lindem (acee)" <acee@cisco.com>
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Subject: Re: [Idr] Review Updates to draft-ietf-idr-bgp-prefix-sid
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--94eb2c1b4ec859ba0605657e98f0
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

Hi Acee,

We are talking about 3107 here. That is to construct MPLS forwarding data
plane.

What goes into data plane is label and next hop - NLRI prefix really does
not matter here. The switching path is MPLS2MPLS not IP2MPLS in my point.

So what is going to happen if someone verbatim follows what is written in
this paragraph is that two prefixes P1 & P2 with different next hops NH1 &
NH2 and the same SID index S are present in BGP. This is the "conflict"
paragraph is trying to address.

Now some router R1 will receive P1 first and some other router R2 will
receive P2 first.

So what get's programmed into data plane is this:

R1 - lookup label: S index +base with next hop: NH1

R2 - lookup label: S index + base with next hop NH2

As you can see creating a rule based on the order in which different
prefixes are received will result in rather messy data plane.

Cheers,
R.









On Sun, Feb 18, 2018 at 1:38 PM, Acee Lindem (acee) <acee@cisco.com> wrote:

> Hi Robert,
>
>
>
> *From: *<rraszuk@gmail.com> on behalf of Robert Raszuk <robert@raszuk.net=
>
> *Date: *Sunday, February 18, 2018 at 5:57 AM
> *To: *Acee Lindem <acee@cisco.com>
> *Cc: *IDR List <idr@ietf.org>
> *Subject: *Re: [Idr] Review Updates to draft-ietf-idr-bgp-prefix-sid
>
>
>
> Hi Acee,
>
>
>
> Since we are at the open surgery of this draft there is one more point
> which did not got resolved during our offline discussion. Feedback from W=
G
> is welcome here.
>
>
>
> The draft RECOMMENDS the following procedure in case of a conflict:
>
>
>
> ... it is RECOMMENDED that the first prefix using the label index is sele=
cted.
>
>
>
> In BGP there is no guarantee about ordered delivery of BGP prefixes.  It
> may work such in some specific topologies but not in any arbitrary one. S=
o
> if we recommend to pick one prefix on R1 and different prefix on R2 and
> install in forwarding the same SID for those I am afraid the data plane
> will get quite severely messed up and even finding it during
> troubleshooting will be quite hard.
>
>
>
> Also as pointed out already MPLS anycast SID may on purpose use the same
> label across nodes according to draft-ietf-spring-mpls-anycast-segments-0=
2.
> Now if we want to accomplish the same in BGP we would need to advertise
> different prefixes with the same SID (in MPLS-SR index). the above
> paragraph does prevents that. Note that adding and advertising the _same_
> prefix from different nodes will not work as BGP speakers may pick only o=
ne
> (best path) and use it for forwarding. IBGP or EBGP multipath may not
> always be enabled/use same set.
>
>
>
> I don=E2=80=99t understand this concern either. The text applies to diffe=
rence
> prefixes, not an anycast where multiple BGP speakers with advertise the
> same <prefix, SID> tuple.
>
>
>
> Thanks,
>
> Acee
>
>
>
> The crux of the issue when advertising SIDs in BGP is not so much about
> prefixes, but their next hops which unfortunately the draft does not even
> mention once.
>
>
>
> Kind regards,
>
> Robert.
>
>
>

--94eb2c1b4ec859ba0605657e98f0
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small">Hi Acee,</div><div class=3D"gmail_defau=
lt" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></=
div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-=
serif;font-size:small">We are talking about 3107 here. That is to construct=
 MPLS forwarding data plane.</div><div class=3D"gmail_default" style=3D"fon=
t-family:arial,helvetica,sans-serif;font-size:small"><br></div><div class=
=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-siz=
e:small">What goes into data plane is label and next hop - NLRI prefix real=
ly does not matter here. The switching path is MPLS2MPLS not IP2MPLS in my =
point.=C2=A0</div><div class=3D"gmail_default" style=3D"font-family:arial,h=
elvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_default"=
 style=3D"font-family:arial,helvetica,sans-serif;font-size:small">So what i=
s going to happen if someone verbatim follows what is written in this parag=
raph is that two prefixes P1 &amp; P2 with different next hops NH1 &amp; NH=
2 and the same SID index S are present in BGP. This is the &quot;conflict&q=
uot; paragraph is trying to address.=C2=A0</div><div class=3D"gmail_default=
" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></di=
v><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-se=
rif;font-size:small">Now some router R1 will receive P1 first and some othe=
r router R2 will receive P2 first.=C2=A0</div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></div>=
<div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-seri=
f;font-size:small">So what get&#39;s programmed into data plane is this:=C2=
=A0</div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,=
sans-serif;font-size:small"><br></div><div class=3D"gmail_default" style=3D=
"font-family:arial,helvetica,sans-serif;font-size:small">R1 - lookup label:=
 S index +base with next hop: NH1=C2=A0</div><div class=3D"gmail_default" s=
tyle=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></div><=
div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif=
;font-size:small">R2 - lookup label: S index + base with next hop NH2</div>=
<div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-seri=
f;font-size:small"><br></div><div class=3D"gmail_default" style=3D"font-fam=
ily:arial,helvetica,sans-serif;font-size:small">As you can see creating a r=
ule based on the order in which different prefixes are received will result=
 in rather messy data plane.</div><div class=3D"gmail_default" style=3D"fon=
t-family:arial,helvetica,sans-serif;font-size:small"><br></div><div class=
=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-siz=
e:small">Cheers,</div><div class=3D"gmail_default" style=3D"font-family:ari=
al,helvetica,sans-serif;font-size:small">R.</div><div class=3D"gmail_defaul=
t" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></d=
iv><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-s=
erif;font-size:small"><br></div><div class=3D"gmail_default" style=3D"font-=
family:arial,helvetica,sans-serif;font-size:small"><br></div><div class=3D"=
gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:sm=
all"><br></div><div class=3D"gmail_default" style=3D"font-family:arial,helv=
etica,sans-serif;font-size:small"><br></div><div class=3D"gmail_default" st=
yle=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></div><d=
iv class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;=
font-size:small"><br></div><div class=3D"gmail_default" style=3D"font-famil=
y:arial,helvetica,sans-serif;font-size:small"><br></div></div><div class=3D=
"gmail_extra"><br><div class=3D"gmail_quote">On Sun, Feb 18, 2018 at 1:38 P=
M, Acee Lindem (acee) <span dir=3D"ltr">&lt;<a href=3D"mailto:acee@cisco.co=
m" target=3D"_blank">acee@cisco.com</a>&gt;</span> wrote:<br><blockquote cl=
ass=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;p=
adding-left:1ex">





<div lang=3D"EN-US" link=3D"#0563C1" vlink=3D"#954F72">
<div class=3D"m_-299340581709666798WordSection1">
<p class=3D"MsoNormal">Hi Robert, <u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div style=3D"border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><b><span style=3D"font-si=
ze:12.0pt;color:black">From:
</span></b><span style=3D"font-size:12.0pt;color:black">&lt;<a href=3D"mail=
to:rraszuk@gmail.com" target=3D"_blank">rraszuk@gmail.com</a>&gt; on behalf=
 of Robert Raszuk &lt;<a href=3D"mailto:robert@raszuk.net" target=3D"_blank=
">robert@raszuk.net</a>&gt;<br>
<b>Date: </b>Sunday, February 18, 2018 at 5:57 AM<br>
<b>To: </b>Acee Lindem &lt;<a href=3D"mailto:acee@cisco.com" target=3D"_bla=
nk">acee@cisco.com</a>&gt;<br>
<b>Cc: </b>IDR List &lt;<a href=3D"mailto:idr@ietf.org" target=3D"_blank">i=
dr@ietf.org</a>&gt;<span class=3D""><br>
<b>Subject: </b>Re: [Idr] Review Updates to draft-ietf-idr-bgp-prefix-sid<u=
></u><u></u></span></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><u></u>=C2=A0<u></u></p>
</div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><a name=3D"m_-29934058170=
9666798__MailOriginalBody"><span style=3D"font-size:12.0pt;font-family:&quo=
t;Arial&quot;,sans-serif">Hi Acee,<u></u><u></u></span></a></p>
</div><span class=3D"">
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><span style=3D"font=
-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif"><u></u>=C2=A0<u></u>=
</span></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><span style=3D"font=
-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif">Since we are at the =
open surgery of this draft there is one more point which did not got resolv=
ed during
 our offline discussion. Feedback from WG is welcome here.<u></u><u></u></s=
pan></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><span style=3D"font=
-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif"><u></u>=C2=A0<u></u>=
</span></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><span style=3D"font=
-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif">The draft RECOMMENDS=
 the following procedure in case of a conflict:=C2=A0<u></u><u></u></span><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><span style=3D"font=
-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif"><u></u>=C2=A0<u></u>=
</span></span></p>
</div>
<div>
<pre style=3D"margin-left:.5in;font-variant-ligatures:normal;font-variant-c=
aps:normal;text-align:start;text-decoration-style:initial;text-decoration-c=
olor:initial;word-spacing:0px"><span><span style=3D"color:black">... it is =
RECOMMENDED that the first prefix using the label index is selected.<u></u>=
<u></u></span></span></pre>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><span style=3D"font=
-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif"><u></u>=C2=A0<u></u>=
</span></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><span style=3D"font=
-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif;color:#222222;backgro=
und:white">In BGP there is no guarantee about ordered delivery of BGP prefi=
xes.=C2=A0</span></span><span><span style=3D"font-size:12.0pt;font-family:&=
quot;Arial&quot;,sans-serif">=C2=A0It
 may work such in some specific topologies but not in any arbitrary one. So=
 if we recommend to pick one prefix on R1 and different prefix on R2 and in=
stall in forwarding the same SID for those I am afraid the data plane will =
get quite severely messed up and
 even finding it during troubleshooting will be quite hard.=C2=A0<u></u><u>=
</u></span></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><span style=3D"font=
-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif"><u></u>=C2=A0<u></u>=
</span></span></p>
</div>
</span><div><span class=3D"">
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><span style=3D"font=
-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif">Also as pointed out =
already MPLS anycast SID may on purpose use the same label across nodes acc=
ording to=C2=A0draft-ietf-spring-mpls-<wbr>anycast-segments-02.
 Now if we want to accomplish the same in BGP we would need to advertise di=
fferent prefixes with the same SID (in MPLS-SR index). the above paragraph =
does prevents that. Note that adding and advertising the _same_ prefix from=
 different nodes will not work as
 BGP speakers may pick only one (best path) and use it for forwarding. IBGP=
 or EBGP multipath may not always be enabled/use same set.<u></u><u></u></s=
pan></span></p>
<p class=3D"MsoNormal"><span><u></u>=C2=A0<u></u></span></p>
</span><p class=3D"MsoNormal"><span>I don=E2=80=99t understand this concern=
 either. The text applies to difference prefixes, not an anycast where mult=
iple BGP speakers with advertise the same &lt;prefix, SID&gt; tuple.
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span>Thanks,<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span>Acee <u></u><u></u></span></p>
</div><span class=3D"">
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><span style=3D"font=
-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif"><u></u>=C2=A0<u></u>=
</span></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><span style=3D"font=
-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif">The crux of the issu=
e when advertising SIDs in BGP is not so much about prefixes, but their nex=
t hops which
 unfortunately the draft does not even mention once.<u></u><u></u></span></=
span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><span style=3D"font=
-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif"><u></u>=C2=A0<u></u>=
</span></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><span style=3D"font=
-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif">Kind regards,<u></u>=
<u></u></span></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><span style=3D"font=
-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif">Robert.=C2=A0<u></u>=
<u></u></span></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><span style=3D"font=
-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif"><u></u>=C2=A0<u></u>=
</span></span></p>
</div>
</span></div>
</div>
</div>

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

--94eb2c1b4ec859ba0605657e98f0--


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--f40304389254b5884a05657ea0e8
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

Hi Sue,

Well Acee said himself few email back:

"Dear Alvaro and IDR WG:



     There is one more change we=E2=80=99d like to make to the draft that r=
equires
WG approval."


I maybe just don't 'know what formally this "WG approval" is :)


Thx,
R.





On Sun, Feb 18, 2018 at 4:54 PM, Susan Hares <shares@ndzh.com> wrote:

> Robert and Acee:
>
>
>
> If we do =E2=80=9Copen surgery=E2=80=9D, this document will need to go ba=
ck through the
> process (WG LC, IETF LC, and IESG Review).
>
>
>
> Sue Hares
>
> IDR co-chiar
>
>
>
> *From:* Idr [mailto:idr-bounces@ietf.org] *On Behalf Of *Robert Raszuk
> *Sent:* Sunday, February 18, 2018 5:57 AM
> *To:* Acee Lindem (acee)
> *Cc:* idr@ietf.org
> *Subject:* Re: [Idr] Review Updates to draft-ietf-idr-bgp-prefix-sid
>
>
>
> Hi Acee,
>
>
>
> Since we are at the open surgery of this draft there is one more point
> which did not got resolved during our offline discussion. Feedback from W=
G
> is welcome here.
>
>
>
> The draft RECOMMENDS the following procedure in case of a conflict:
>
>
>
> ... it is RECOMMENDED that the first prefix using the label index is sele=
cted.
>
>
>
> In BGP there is no guarantee about ordered delivery of BGP prefixes.  It
> may work such in some specific topologies but not in any arbitrary one. S=
o
> if we recommend to pick one prefix on R1 and different prefix on R2 and
> install in forwarding the same SID for those I am afraid the data plane
> will get quite severely messed up and even finding it during
> troubleshooting will be quite hard.
>
>
>
> Also as pointed out already MPLS anycast SID may on purpose use the same
> label across nodes according to draft-ietf-spring-mpls-anycast-segments-0=
2.
> Now if we want to accomplish the same in BGP we would need to advertise
> different prefixes with the same SID (in MPLS-SR index). the above
> paragraph does prevents that. Note that adding and advertising the _same_
> prefix from different nodes will not work as BGP speakers may pick only o=
ne
> (best path) and use it for forwarding. IBGP or EBGP multipath may not
> always be enabled/use same set.
>
>
>
> The crux of the issue when advertising SIDs in BGP is not so much about
> prefixes, but their next hops which unfortunately the draft does not even
> mention once.
>
>
>
> Kind regards,
>
> Robert.
>
>
>

--f40304389254b5884a05657ea0e8
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small">Hi Sue,</div><div class=3D"gmail_defaul=
t" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></d=
iv><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-s=
erif;font-size:small">Well Acee said himself few email back:=C2=A0</div><di=
v class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;f=
ont-size:small"><br></div><div class=3D"gmail_default" style=3D"font-family=
:arial,helvetica,sans-serif;font-size:small">

<p class=3D"MsoNormal" style=3D"margin:0px;color:rgb(34,34,34);font-family:=
arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:=
normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-=
align:start;text-indent:0px;text-transform:none;white-space:normal;word-spa=
cing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;te=
xt-decoration-color:initial">&quot;Dear Alvaro and IDR WG:<u></u><u></u></p=
><p class=3D"MsoNormal" style=3D"margin:0px;color:rgb(34,34,34);font-family=
:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures=
:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text=
-align:start;text-indent:0px;text-transform:none;white-space:normal;word-sp=
acing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;t=
ext-decoration-color:initial"><u></u>=C2=A0<u></u></p><p class=3D"MsoNormal=
" style=3D"margin:0px;color:rgb(34,34,34);font-family:arial,sans-serif;font=
-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-c=
aps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-inde=
nt:0px;text-transform:none;white-space:normal;word-spacing:0px;background-c=
olor:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:i=
nitial">=C2=A0=C2=A0=C2=A0=C2=A0 There is one more change we=E2=80=99d like=
 to make to the draft that requires WG approval.&quot;</p><p class=3D"MsoNo=
rmal" style=3D"margin:0px;color:rgb(34,34,34);font-family:arial,sans-serif;=
font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-varia=
nt-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-=
indent:0px;text-transform:none;white-space:normal;word-spacing:0px;backgrou=
nd-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-col=
or:initial"><br></p><p class=3D"MsoNormal" style=3D"margin:0px;color:rgb(34=
,34,34);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;fon=
t-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-=
spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-s=
pace:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decorat=
ion-style:initial;text-decoration-color:initial">I maybe just don&#39;t &#3=
9;know what formally this &quot;WG approval&quot; is :)</p><p class=3D"MsoN=
ormal" style=3D"margin:0px;color:rgb(34,34,34);font-family:arial,sans-serif=
;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-vari=
ant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text=
-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;backgro=
und-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-co=
lor:initial"><br></p><p class=3D"MsoNormal" style=3D"margin:0px;color:rgb(3=
4,34,34);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;fo=
nt-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter=
-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-=
space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decora=
tion-style:initial;text-decoration-color:initial">Thx,<br>R.</p><p class=3D=
"MsoNormal" style=3D"margin:0px;color:rgb(34,34,34);font-family:arial,sans-=
serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font=
-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start=
;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;ba=
ckground-color:rgb(255,255,255);text-decoration-style:initial;text-decorati=
on-color:initial"><br></p><p class=3D"MsoNormal" style=3D"margin:0px;color:=
rgb(34,34,34);font-family:arial,sans-serif;font-size:12.8px;font-style:norm=
al;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;l=
etter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;w=
hite-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-d=
ecoration-style:initial;text-decoration-color:initial"><br></p>

<br></div></div><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">O=
n Sun, Feb 18, 2018 at 4:54 PM, Susan Hares <span dir=3D"ltr">&lt;<a href=
=3D"mailto:shares@ndzh.com" target=3D"_blank">shares@ndzh.com</a>&gt;</span=
> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;bo=
rder-left:1px #ccc solid;padding-left:1ex"><div lang=3D"EN-US" link=3D"blue=
" vlink=3D"purple"><div class=3D"m_7907446468484849890WordSection1"><p clas=
s=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&q=
uot;,&quot;sans-serif&quot;;color:#1f497d">Robert and Acee:<u></u><u></u></=
span></p><p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family=
:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u>=
</u></span></p><p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-=
family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1f497d">If we do =
=E2=80=9Copen surgery=E2=80=9D, this document will need to go back through =
the process (WG LC, IETF LC, and IESG Review). <u></u><u></u></span></p><p =
class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Calib=
ri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></span><=
/p><p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,&quot;sans-serif&quot;;color:#1f497d">Sue Hares<u></u><u></u=
></span></p><p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-fam=
ily:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1f497d">IDR co-chiar<=
u></u><u></u></span></p><p class=3D"MsoNormal"><span style=3D"font-size:11.=
0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1f497d"><=
u></u>=C2=A0<u></u></span></p><p class=3D"MsoNormal"><b><span style=3D"font=
-size:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;">From:</=
span></b><span style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,&qu=
ot;sans-serif&quot;"> Idr [mailto:<a href=3D"mailto:idr-bounces@ietf.org" t=
arget=3D"_blank">idr-bounces@ietf.org</a>] <b>On Behalf Of </b>Robert Raszu=
k<br><b>Sent:</b> Sunday, February 18, 2018 5:57 AM<br><b>To:</b> Acee Lind=
em (acee)<br><b>Cc:</b> <a href=3D"mailto:idr@ietf.org" target=3D"_blank">i=
dr@ietf.org</a><span class=3D""><br><b>Subject:</b> Re: [Idr] Review Update=
s to draft-ietf-idr-bgp-prefix-sid<u></u><u></u></span></span></p><p class=
=3D"MsoNormal"><u></u>=C2=A0<u></u></p><div><div><p class=3D"MsoNormal"><sp=
an style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">Hi Acee,<=
u></u><u></u></span></p></div><div><div class=3D"h5"><div><p class=3D"MsoNo=
rmal"><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">=
<u></u>=C2=A0<u></u></span></p></div><div><p class=3D"MsoNormal"><span styl=
e=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">Since we are at =
the open surgery of this draft there is one more point which did not got re=
solved during our offline discussion. Feedback from WG is welcome here.<u><=
/u><u></u></span></p></div><div><p class=3D"MsoNormal"><span style=3D"font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;"><u></u>=C2=A0<u></u></span=
></p></div><div><p class=3D"MsoNormal"><span style=3D"font-family:&quot;Ari=
al&quot;,&quot;sans-serif&quot;">The draft RECOMMENDS the following procedu=
re in case of a conflict:=C2=A0<u></u><u></u></span></p></div><div><p class=
=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-seri=
f&quot;"><u></u>=C2=A0<u></u></span></p></div><div><pre style=3D"font-varia=
nt-ligatures:normal;font-variant-caps:normal;text-align:start;text-decorati=
on-style:initial;text-decoration-color:initial;word-spacing:0px"><span styl=
e=3D"color:black">... it is RECOMMENDED that the first prefix using the lab=
el index is selected.<u></u><u></u></span></pre><p class=3D"MsoNormal"><spa=
n style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;"><u></u>=C2=
=A0<u></u></span></p></div><div><p class=3D"MsoNormal"><span style=3D"font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#222222;background:wh=
ite">In BGP there is no guarantee about ordered delivery of BGP prefixes.=
=C2=A0</span><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&=
quot;">=C2=A0It may work such in some specific topologies but not in any ar=
bitrary one. So if we recommend to pick one prefix on R1 and different pref=
ix on R2 and install in forwarding the same SID for those I am afraid the d=
ata plane will get quite severely messed up and even finding it during trou=
bleshooting will be quite hard.=C2=A0<u></u><u></u></span></p></div><div><p=
 class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,&quot;san=
s-serif&quot;"><u></u>=C2=A0<u></u></span></p></div><div><p class=3D"MsoNor=
mal"><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">A=
lso as pointed out already MPLS anycast SID may on purpose use the same lab=
el across nodes according to=C2=A0draft-ietf-spring-mpls-<wbr>anycast-segme=
nts-02. Now if we want to accomplish the same in BGP we would need to adver=
tise different prefixes with the same SID (in MPLS-SR index). the above par=
agraph does prevents that. Note that adding and advertising the _same_ pref=
ix from different nodes will not work as BGP speakers may pick only one (be=
st path) and use it for forwarding. IBGP or EBGP multipath may not always b=
e enabled/use same set.<u></u><u></u></span></p></div><div><p class=3D"MsoN=
ormal"><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;"=
><u></u>=C2=A0<u></u></span></p></div><div><p class=3D"MsoNormal"><span sty=
le=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">The crux of the=
 issue when advertising SIDs in BGP is not so much about prefixes, but thei=
r next hops which unfortunately the draft does not even mention once.<u></u=
><u></u></span></p></div><div><p class=3D"MsoNormal"><span style=3D"font-fa=
mily:&quot;Arial&quot;,&quot;sans-serif&quot;"><u></u>=C2=A0<u></u></span><=
/p></div><div><p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial=
&quot;,&quot;sans-serif&quot;">Kind regards,<u></u><u></u></span></p></div>=
<div><p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,&q=
uot;sans-serif&quot;">Robert.=C2=A0<u></u><u></u></span></p></div><div><p c=
lass=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-=
serif&quot;"><u></u>=C2=A0<u></u></span></p></div></div></div></div></div><=
/div></blockquote></div><br></div>

--f40304389254b5884a05657ea0e8--


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Subject: Re: [Idr] Review Updates to draft-ietf-idr-bgp-prefix-sid
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Robert:=20

=20

<process moment on>=20

As an AD, Alvaro may change to the document (see the history and his =
comments).  Due to the substantial nature of his comments during the AD =
evaluation and IESG review, the WG must approve the changes.   =
Alvaro=E2=80=99s checking to see if the WG agrees with his changes.   If =
the IDR WG agrees with it, then document does go forward to the RFC =
editor.   If WG objects,  then document will be return to the IDR for =
=E2=80=9Csurgery=E2=80=9D, and then go through the process again (IDR WG =
LC, IETF LC, IESG evaluation. =20

=20

Such is the power of the AD review and changes suggest to the authors.   =


<process moment off>=20

=20

I hope this process moment provides a cheerily chuckle in your day.  =20

=20

Sue=20

=20

=20

From: Idr [mailto:idr-bounces@ietf.org] On Behalf Of Robert Raszuk
Sent: Sunday, February 18, 2018 10:57 AM
To: Susan Hares
Cc: idr wg
Subject: Re: [Idr] Review Updates to draft-ietf-idr-bgp-prefix-sid

=20

Hi Sue,

=20

Well Acee said himself few email back:=20

=20

"Dear Alvaro and IDR WG:

=20

     There is one more change we=E2=80=99d like to make to the draft =
that requires WG approval."

=20

I maybe just don't 'know what formally this "WG approval" is :)

=20

Thx,
R.

=20

=20

=20

=20

On Sun, Feb 18, 2018 at 4:54 PM, Susan Hares <shares@ndzh.com> wrote:

Robert and Acee:

=20

If we do =E2=80=9Copen surgery=E2=80=9D, this document will need to go =
back through the process (WG LC, IETF LC, and IESG Review).=20

=20

Sue Hares

IDR co-chiar

=20

From: Idr [mailto:idr-bounces@ietf.org] On Behalf Of Robert Raszuk
Sent: Sunday, February 18, 2018 5:57 AM
To: Acee Lindem (acee)
Cc: idr@ietf.org
Subject: Re: [Idr] Review Updates to draft-ietf-idr-bgp-prefix-sid

=20

Hi Acee,

=20

Since we are at the open surgery of this draft there is one more point =
which did not got resolved during our offline discussion. Feedback from =
WG is welcome here.

=20

The draft RECOMMENDS the following procedure in case of a conflict:=20

=20

... it is RECOMMENDED that the first prefix using the label index is =
selected.

=20

In BGP there is no guarantee about ordered delivery of BGP prefixes.  It =
may work such in some specific topologies but not in any arbitrary one. =
So if we recommend to pick one prefix on R1 and different prefix on R2 =
and install in forwarding the same SID for those I am afraid the data =
plane will get quite severely messed up and even finding it during =
troubleshooting will be quite hard.=20

=20

Also as pointed out already MPLS anycast SID may on purpose use the same =
label across nodes according to =
draft-ietf-spring-mpls-anycast-segments-02. Now if we want to accomplish =
the same in BGP we would need to advertise different prefixes with the =
same SID (in MPLS-SR index). the above paragraph does prevents that. =
Note that adding and advertising the _same_ prefix from different nodes =
will not work as BGP speakers may pick only one (best path) and use it =
for forwarding. IBGP or EBGP multipath may not always be enabled/use =
same set.

=20

The crux of the issue when advertising SIDs in BGP is not so much about =
prefixes, but their next hops which unfortunately the draft does not =
even mention once.

=20

Kind regards,

Robert.=20

=20

=20


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</o:shapelayout></xml><![endif]--></head><body lang=3DEN-US link=3Dblue =
vlink=3Dpurple><div class=3DWordSection1><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Robert: <o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&lt;process moment on&gt; <o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>As an AD, Alvaro may change to the document (see the history and his =
comments).=C2=A0 Due to the substantial nature of his comments during =
the AD evaluation and IESG review, the WG must approve the changes. =
=C2=A0=C2=A0Alvaro=E2=80=99s checking to see if the WG agrees with his =
changes.=C2=A0=C2=A0 If the IDR WG agrees with it, then document does go =
forward to the RFC editor. =C2=A0=C2=A0If WG objects, =C2=A0then =
document will be return to the IDR for =E2=80=9Csurgery=E2=80=9D, and =
then go through the process again (IDR WG LC, IETF LC, IESG evaluation. =
=C2=A0<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Such is the power of the AD review and changes suggest to the =
authors.=C2=A0 =C2=A0<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&lt;process moment off&gt; <o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>I hope this process moment provides a cheerily chuckle in your =
day.=C2=A0 =C2=A0<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Sue <o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><b><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span>=
</b><span style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'> =
Idr [mailto:idr-bounces@ietf.org] <b>On Behalf Of </b>Robert =
Raszuk<br><b>Sent:</b> Sunday, February 18, 2018 10:57 AM<br><b>To:</b> =
Susan Hares<br><b>Cc:</b> idr wg<br><b>Subject:</b> Re: [Idr] Review =
Updates to draft-ietf-idr-bgp-prefix-sid<o:p></o:p></span></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><div><div><p =
class=3DMsoNormal><span style=3D'font-family:"Arial","sans-serif"'>Hi =
Sue,<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-family:"Arial","sans-serif"'><o:p>&nbsp;</o:p></span></p></=
div><div><p class=3DMsoNormal><span =
style=3D'font-family:"Arial","sans-serif"'>Well Acee said himself few =
email back:&nbsp;<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
style=3D'font-family:"Arial","sans-serif"'><o:p>&nbsp;</o:p></span></p></=
div><div><p class=3DMsoNormal =
style=3D'background:white;font-variant-ligatures:normal;font-variant-caps=
:normal;text-align:start;text-decoration-style:initial;text-decoration-co=
lor:initial;word-spacing:0px'><span =
style=3D'font-size:9.5pt;font-family:"Arial","sans-serif";color:#222222'>=
&quot;Dear Alvaro and IDR WG:<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'background:white;font-variant-ligatures:normal;font-variant-caps=
:normal;text-align:start;text-decoration-style:initial;text-decoration-co=
lor:initial;word-spacing:0px'><span =
style=3D'font-size:9.5pt;font-family:"Arial","sans-serif";color:#222222'>=
&nbsp;<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'background:white;font-variant-ligatures:normal;font-variant-caps=
:normal;text-align:start;text-decoration-style:initial;text-decoration-co=
lor:initial;word-spacing:0px'><span =
style=3D'font-size:9.5pt;font-family:"Arial","sans-serif";color:#222222'>=
&nbsp;&nbsp;&nbsp;&nbsp; There is one more change we=E2=80=99d like to =
make to the draft that requires WG =
approval.&quot;<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'background:white;font-variant-ligatures:normal;font-variant-caps=
:normal;text-align:start;text-decoration-style:initial;text-decoration-co=
lor:initial;word-spacing:0px'><span =
style=3D'font-size:9.5pt;font-family:"Arial","sans-serif";color:#222222'>=
<o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal =
style=3D'background:white;font-variant-ligatures:normal;font-variant-caps=
:normal;text-align:start;text-decoration-style:initial;text-decoration-co=
lor:initial;word-spacing:0px'><span =
style=3D'font-size:9.5pt;font-family:"Arial","sans-serif";color:#222222'>=
I maybe just don't 'know what formally this &quot;WG approval&quot; is =
:)<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'background:white;font-variant-ligatures:normal;font-variant-caps=
:normal;text-align:start;text-decoration-style:initial;text-decoration-co=
lor:initial;word-spacing:0px'><span =
style=3D'font-size:9.5pt;font-family:"Arial","sans-serif";color:#222222'>=
<o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal =
style=3D'background:white;font-variant-ligatures:normal;font-variant-caps=
:normal;text-align:start;text-decoration-style:initial;text-decoration-co=
lor:initial;word-spacing:0px'><span =
style=3D'font-size:9.5pt;font-family:"Arial","sans-serif";color:#222222'>=
Thx,<br>R.<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'background:white;font-variant-ligatures:normal;font-variant-caps=
:normal;text-align:start;text-decoration-style:initial;text-decoration-co=
lor:initial;word-spacing:0px'><span =
style=3D'font-size:9.5pt;font-family:"Arial","sans-serif";color:#222222'>=
<o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal =
style=3D'background:white;font-variant-ligatures:normal;font-variant-caps=
:normal;text-align:start;text-decoration-style:initial;text-decoration-co=
lor:initial;word-spacing:0px'><span =
style=3D'font-size:9.5pt;font-family:"Arial","sans-serif";color:#222222'>=
<o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-family:"Arial","sans-serif"'><o:p>&nbsp;</o:p></span></p></=
div></div><div><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><div><p =
class=3DMsoNormal>On Sun, Feb 18, 2018 at 4:54 PM, Susan Hares &lt;<a =
href=3D"mailto:shares@ndzh.com" =
target=3D"_blank">shares@ndzh.com</a>&gt; =
wrote:<o:p></o:p></p><div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Robert and Acee:</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>If we do =E2=80=9Copen surgery=E2=80=9D, this document will need to =
go back through the process (WG LC, IETF LC, and IESG Review). =
</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Sue Hares</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>IDR co-chiar</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span>=
</b><span style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'> =
Idr [mailto:<a href=3D"mailto:idr-bounces@ietf.org" =
target=3D"_blank">idr-bounces@ietf.org</a>] <b>On Behalf Of </b>Robert =
Raszuk<br><b>Sent:</b> Sunday, February 18, 2018 5:57 AM<br><b>To:</b> =
Acee Lindem (acee)<br><b>Cc:</b> <a href=3D"mailto:idr@ietf.org" =
target=3D"_blank">idr@ietf.org</a><br><b>Subject:</b> Re: [Idr] Review =
Updates to draft-ietf-idr-bgp-prefix-sid</span><o:p></o:p></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>&nbsp;<o:p><=
/o:p></p><div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-family:"Arial","sans-serif"'>Hi =
Acee,</span><o:p></o:p></p></div><div><div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-family:"Arial","sans-serif"'>&nbsp;</span><o:p></o:p></p></=
div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-family:"Arial","sans-serif"'>Since we are at the open =
surgery of this draft there is one more point which did not got resolved =
during our offline discussion. Feedback from WG is welcome =
here.</span><o:p></o:p></p></div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-family:"Arial","sans-serif"'>&nbsp;</span><o:p></o:p></p></=
div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-family:"Arial","sans-serif"'>The draft RECOMMENDS the =
following procedure in case of a =
conflict:&nbsp;</span><o:p></o:p></p></div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-family:"Arial","sans-serif"'>&nbsp;</span><o:p></o:p></p></=
div><div><pre =
style=3D'font-variant-ligatures:normal;font-variant-caps:normal;text-alig=
n:start;text-decoration-style:initial;text-decoration-color:initial;word-=
spacing:0px'><span style=3D'color:black'>... it is RECOMMENDED that the =
first prefix using the label index is =
selected.</span><o:p></o:p></pre><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-family:"Arial","sans-serif"'>&nbsp;</span><o:p></o:p></p></=
div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-family:"Arial","sans-serif";color:#222222;background:white'=
>In BGP there is no guarantee about ordered delivery of BGP =
prefixes.&nbsp;</span><span =
style=3D'font-family:"Arial","sans-serif"'>&nbsp;It may work such in =
some specific topologies but not in any arbitrary one. So if we =
recommend to pick one prefix on R1 and different prefix on R2 and =
install in forwarding the same SID for those I am afraid the data plane =
will get quite severely messed up and even finding it during =
troubleshooting will be quite =
hard.&nbsp;</span><o:p></o:p></p></div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-family:"Arial","sans-serif"'>&nbsp;</span><o:p></o:p></p></=
div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-family:"Arial","sans-serif"'>Also as pointed out already =
MPLS anycast SID may on purpose use the same label across nodes =
according to&nbsp;draft-ietf-spring-mpls-anycast-segments-02. Now if we =
want to accomplish the same in BGP we would need to advertise different =
prefixes with the same SID (in MPLS-SR index). the above paragraph does =
prevents that. Note that adding and advertising the _same_ prefix from =
different nodes will not work as BGP speakers may pick only one (best =
path) and use it for forwarding. IBGP or EBGP multipath may not always =
be enabled/use same set.</span><o:p></o:p></p></div><div><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-family:"Arial","sans-serif"'>&nbsp;</span><o:p></o:p></p></=
div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-family:"Arial","sans-serif"'>The crux of the issue when =
advertising SIDs in BGP is not so much about prefixes, but their next =
hops which unfortunately the draft does not even mention =
once.</span><o:p></o:p></p></div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-family:"Arial","sans-serif"'>&nbsp;</span><o:p></o:p></p></=
div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-family:"Arial","sans-serif"'>Kind =
regards,</span><o:p></o:p></p></div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-family:"Arial","sans-serif"'>Robert.&nbsp;</span><o:p></o:p=
></p></div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-family:"Arial","sans-serif"'>&nbsp;</span><o:p></o:p></p></=
div></div></div></div></div></div></div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p></div></div></body></html>
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From: "Acee Lindem (acee)" <acee@cisco.com>
To: Robert Raszuk <robert@raszuk.net>
CC: "idr@ietf.org" <idr@ietf.org>
Thread-Topic: [Idr] Review Updates to draft-ietf-idr-bgp-prefix-sid
Thread-Index: AQHTqC+e7Nh2hXcdJUOHYf0GVX2qqKOpbpWA//+v4gCAAFYvAP//sHaAgAEszgD//8hUgAARWJ2A///GMgA=
Date: Sun, 18 Feb 2018 17:27:48 +0000
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--_000_2580CE53A0354C36A7B062A995D59A0Cciscocom_--


From nobody Sun Feb 18 09:34:54 2018
Return-Path: <rraszuk@gmail.com>
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From: Robert Raszuk <robert@raszuk.net>
Date: Sun, 18 Feb 2018 18:34:48 +0100
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To: "Acee Lindem (acee)" <acee@cisco.com>
Cc: "idr@ietf.org" <idr@ietf.org>
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Subject: Re: [Idr] Review Updates to draft-ietf-idr-bgp-prefix-sid
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Acee,

>  it is not broken since MPLS switching is stll hop-by-hop

If NH1 and NH2 point in opposite directions you have permanent forwarding
loop between hops when packet arrives with label S+base. Is it really not a
prove of it being slightly broken ?

Thx,
R.

On Sun, Feb 18, 2018 at 6:27 PM, Acee Lindem (acee) <acee@cisco.com> wrote:

> Hi Robert,
>
>
>
> *From: *<rraszuk@gmail.com> on behalf of Robert Raszuk <robert@raszuk.net=
>
> *Date: *Sunday, February 18, 2018 at 10:54 AM
> *To: *Acee Lindem <acee@cisco.com>
> *Cc: *IDR List <idr@ietf.org>
> *Subject: *Re: [Idr] Review Updates to draft-ietf-idr-bgp-prefix-sid
>
>
>
> Hi Acee,
>
>
>
> We are talking about 3107 here. That is to construct MPLS forwarding data
> plane.
>
>
>
> What goes into data plane is label and next hop - NLRI prefix really does
> not matter here. The switching path is MPLS2MPLS not IP2MPLS in my point.
>
>
>
> So what is going to happen if someone verbatim follows what is written in
> this paragraph is that two prefixes P1 & P2 with different next hops NH1 =
&
> NH2 and the same SID index S are present in BGP. This is the "conflict"
> paragraph is trying to address.
>
>
>
> Now some router R1 will receive P1 first and some other router R2 will
> receive P2 first.
>
>
>
> So what get's programmed into data plane is this:
>
>
>
> R1 - lookup label: S index +base with next hop: NH1
>
>
>
> R2 - lookup label: S index + base with next hop NH2
>
>
>
> As you can see creating a rule based on the order in which different
> prefixes are received will result in rather messy data plane.
>
>
>
> There are two reasons that different prefixes would be advertised with th=
e
> same label index, misconfiguration or transition. This rule was posited t=
o
> decrease the number of changes necessary in the case of a transition. In
> any case, while the data plane is messy, it is not broken since MPLS
> switching is stll hop-by-hop using the RFC 8277 label.
>
>
>
> Thanks,
>
> Acee
>
>
>
> Cheers,
>
> R.
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> On Sun, Feb 18, 2018 at 1:38 PM, Acee Lindem (acee) <acee@cisco.com>
> wrote:
>
> Hi Robert,
>
>
>
> *From: *<rraszuk@gmail.com> on behalf of Robert Raszuk <robert@raszuk.net=
>
> *Date: *Sunday, February 18, 2018 at 5:57 AM
> *To: *Acee Lindem <acee@cisco.com>
> *Cc: *IDR List <idr@ietf.org>
> *Subject: *Re: [Idr] Review Updates to draft-ietf-idr-bgp-prefix-sid
>
>
>
> Hi Acee,
>
>
>
> Since we are at the open surgery of this draft there is one more point
> which did not got resolved during our offline discussion. Feedback from W=
G
> is welcome here.
>
>
>
> The draft RECOMMENDS the following procedure in case of a conflict:
>
>
>
> ... it is RECOMMENDED that the first prefix using the label index is sele=
cted.
>
>
>
> In BGP there is no guarantee about ordered delivery of BGP prefixes.  It
> may work such in some specific topologies but not in any arbitrary one. S=
o
> if we recommend to pick one prefix on R1 and different prefix on R2 and
> install in forwarding the same SID for those I am afraid the data plane
> will get quite severely messed up and even finding it during
> troubleshooting will be quite hard.
>
>
>
> Also as pointed out already MPLS anycast SID may on purpose use the same
> label across nodes according to draft-ietf-spring-mpls-anycast-segments-0=
2.
> Now if we want to accomplish the same in BGP we would need to advertise
> different prefixes with the same SID (in MPLS-SR index). the above
> paragraph does prevents that. Note that adding and advertising the _same_
> prefix from different nodes will not work as BGP speakers may pick only o=
ne
> (best path) and use it for forwarding. IBGP or EBGP multipath may not
> always be enabled/use same set.
>
>
>
> I don=E2=80=99t understand this concern either. The text applies to diffe=
rence
> prefixes, not an anycast where multiple BGP speakers with advertise the
> same <prefix, SID> tuple.
>
>
>
> Thanks,
>
> Acee
>
>
>
> The crux of the issue when advertising SIDs in BGP is not so much about
> prefixes, but their next hops which unfortunately the draft does not even
> mention once.
>
>
>
> Kind regards,
>
> Robert.
>
>
>
>
>

--f40304389254867bab05657ffed7
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small">Acee,=C2=A0</div><div class=3D"gmail_de=
fault" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br=
></div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sa=
ns-serif;font-size:small">

<span style=3D"color:rgb(34,34,34);font-family:arial,sans-serif;font-size:1=
2.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:nor=
mal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;=
text-transform:none;white-space:normal;word-spacing:0px;background-color:rg=
b(255,255,255);text-decoration-style:initial;text-decoration-color:initial;=
float:none;display:inline"><span>&gt;=C2=A0=C2=A0</span>it is not broken si=
nce MPLS switching is stll hop-by-hop</span>

<br></div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica=
,sans-serif;font-size:small"><br></div><div class=3D"gmail_default" style=
=3D"font-family:arial,helvetica,sans-serif;font-size:small">If NH1 and NH2 =
point in opposite directions you have permanent forwarding loop between hop=
s when packet arrives with label S+base. Is it really not a prove of it bei=
ng slightly broken ?=C2=A0</div><div class=3D"gmail_default" style=3D"font-=
family:arial,helvetica,sans-serif;font-size:small"><br></div><div class=3D"=
gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:sm=
all">Thx,<br>R.</div></div><div class=3D"gmail_extra"><br><div class=3D"gma=
il_quote">On Sun, Feb 18, 2018 at 6:27 PM, Acee Lindem (acee) <span dir=3D"=
ltr">&lt;<a href=3D"mailto:acee@cisco.com" target=3D"_blank">acee@cisco.com=
</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin=
:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">





<div lang=3D"EN-US" link=3D"blue" vlink=3D"purple">
<div class=3D"m_-1928578547321069347WordSection1">
<p class=3D"MsoNormal">Hi Robert, <u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div style=3D"border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><b><span style=3D"font-si=
ze:12.0pt;color:black">From:
</span></b><span style=3D"font-size:12.0pt;color:black">&lt;<a href=3D"mail=
to:rraszuk@gmail.com" target=3D"_blank">rraszuk@gmail.com</a>&gt; on behalf=
 of Robert Raszuk &lt;<a href=3D"mailto:robert@raszuk.net" target=3D"_blank=
">robert@raszuk.net</a>&gt;<br>
<b>Date: </b>Sunday, February 18, 2018 at 10:54 AM<span class=3D""><br>
<b>To: </b>Acee Lindem &lt;<a href=3D"mailto:acee@cisco.com" target=3D"_bla=
nk">acee@cisco.com</a>&gt;<br>
<b>Cc: </b>IDR List &lt;<a href=3D"mailto:idr@ietf.org" target=3D"_blank">i=
dr@ietf.org</a>&gt;<br>
<b>Subject: </b>Re: [Idr] Review Updates to draft-ietf-idr-bgp-prefix-sid<u=
></u><u></u></span></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><u></u>=C2=A0<u></u></p>
</div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><a name=3D"m_-19285785473=
21069347__MailOriginalBody"><span style=3D"font-size:12.0pt;font-family:&qu=
ot;Arial&quot;,sans-serif">Hi Acee,<u></u><u></u></span></a></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><span style=3D"font=
-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif"><u></u>=C2=A0<u></u>=
</span></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><span style=3D"font=
-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif">We are talking about=
 3107 here. That is to construct MPLS forwarding data plane.<u></u><u></u><=
/span></span></p>
</div><span class=3D"">
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><span style=3D"font=
-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif"><u></u>=C2=A0<u></u>=
</span></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><span style=3D"font=
-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif">What goes into data =
plane is label and next hop - NLRI prefix really does not matter here. The =
switching
 path is MPLS2MPLS not IP2MPLS in my point.=C2=A0<u></u><u></u></span></spa=
n></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><span style=3D"font=
-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif"><u></u>=C2=A0<u></u>=
</span></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><span style=3D"font=
-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif">So what is going to =
happen if someone verbatim follows what is written in this paragraph is tha=
t two prefixes
 P1 &amp; P2 with different next hops NH1 &amp; NH2 and the same SID index =
S are present in BGP. This is the &quot;conflict&quot; paragraph is trying =
to address.=C2=A0<u></u><u></u></span></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><span style=3D"font=
-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif"><u></u>=C2=A0<u></u>=
</span></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><span style=3D"font=
-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif">Now some router R1 w=
ill receive P1 first and some other router R2 will receive P2 first.=C2=A0<=
u></u><u></u></span></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><span style=3D"font=
-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif"><u></u>=C2=A0<u></u>=
</span></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><span style=3D"font=
-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif">So what get&#39;s pr=
ogrammed into data plane is this:=C2=A0<u></u><u></u></span></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><span style=3D"font=
-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif"><u></u>=C2=A0<u></u>=
</span></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><span style=3D"font=
-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif">R1 - lookup label: S=
 index +base with next hop: NH1=C2=A0<u></u><u></u></span></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><span style=3D"font=
-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif"><u></u>=C2=A0<u></u>=
</span></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><span style=3D"font=
-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif">R2 - lookup label: S=
 index + base with next hop NH2<u></u><u></u></span></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><span style=3D"font=
-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif"><u></u>=C2=A0<u></u>=
</span></span></p>
</div>
</span><div><span class=3D"">
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><span style=3D"font=
-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif">As you can see creat=
ing a rule based on the order in which different prefixes are received will=
 result in
 rather messy data plane.<u></u><u></u></span></span></p>
<p class=3D"MsoNormal"><span><u></u>=C2=A0<u></u></span></p>
</span><p class=3D"MsoNormal"><span>There are two reasons that different pr=
efixes would be advertised with the same label index, misconfiguration or t=
ransition. This rule was posited to decrease the number of changes necessar=
y
 in the case of a transition. In any case, while the data plane is messy, i=
t is not broken since MPLS switching is stll hop-by-hop using the RFC 8277 =
label.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span>Thanks,<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span>Acee <u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><span style=3D"font=
-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif"><u></u>=C2=A0<u></u>=
</span></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><span style=3D"font=
-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif">Cheers,<u></u><u></u=
></span></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><span style=3D"font=
-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif">R.<u></u><u></u></sp=
an></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><span style=3D"font=
-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif"><u></u>=C2=A0<u></u>=
</span></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><span style=3D"font=
-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif"><u></u>=C2=A0<u></u>=
</span></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><span style=3D"font=
-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif"><u></u>=C2=A0<u></u>=
</span></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><span style=3D"font=
-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif"><u></u>=C2=A0<u></u>=
</span></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><span style=3D"font=
-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif"><u></u>=C2=A0<u></u>=
</span></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><span style=3D"font=
-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif"><u></u>=C2=A0<u></u>=
</span></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><span style=3D"font=
-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif"><u></u>=C2=A0<u></u>=
</span></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><span style=3D"font=
-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif"><u></u>=C2=A0<u></u>=
</span></span></p>
</div>
</div><span class=3D"">
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><u></u>=C2=A0<u></u=
></span></p>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span>On Sun, Feb 18, 201=
8 at 1:38 PM, Acee Lindem (acee) &lt;</span><a href=3D"mailto:acee@cisco.co=
m" target=3D"_blank"><span>acee@cisco.com</span><span></span></a><span>&gt;
 wrote:<u></u><u></u></span></p>
<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>
<p class=3D"MsoNormal" style=3D"margin-left:.5in">
<span>Hi Robert, <u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in">
<span>=C2=A0<u></u><u></u></span></p>
<div style=3D"border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal" style=3D"margin-left:1.0in">
<span><b><span style=3D"font-size:12.0pt;color:black">From:
</span></b></span><span><span style=3D"font-size:12.0pt;color:black">&lt;</=
span></span><a href=3D"mailto:rraszuk@gmail.com" target=3D"_blank"><span><s=
pan style=3D"font-size:12.0pt">rraszuk@gmail.com</span></span><span></span>=
</a><span><span style=3D"font-size:12.0pt;color:black">&gt;
 on behalf of Robert Raszuk &lt;</span></span><a href=3D"mailto:robert@rasz=
uk.net" target=3D"_blank"><span><span style=3D"font-size:12.0pt">robert@ras=
zuk.net</span></span><span></span></a><span><span style=3D"font-size:12.0pt=
;color:black">&gt;<br>
<b>Date: </b>Sunday, February 18, 2018 at 5:57 AM<br>
<b>To: </b>Acee Lindem &lt;</span></span><a href=3D"mailto:acee@cisco.com" =
target=3D"_blank"><span><span style=3D"font-size:12.0pt">acee@cisco.com</sp=
an></span><span></span></a><span><span style=3D"font-size:12.0pt;color:blac=
k">&gt;<br>
<b>Cc: </b>IDR List &lt;</span></span><a href=3D"mailto:idr@ietf.org" targe=
t=3D"_blank"><span><span style=3D"font-size:12.0pt">idr@ietf.org</span></sp=
an><span></span></a><span><span style=3D"font-size:12.0pt;color:black">&gt;=
<br>
<b>Subject: </b>Re: [Idr] Review Updates to draft-ietf-idr-bgp-prefix-sid</=
span><u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:1.0in">
<span>=C2=A0<u></u><u></u></span></p>
</div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:1.0in">
<span><a name=3D"m_-1928578547321069347_m_-299340581709666798__MailOriginal=
Body"><span style=3D"font-size:12.0pt;font-family:&quot;Arial&quot;,sans-se=
rif">Hi Acee,</span></a><u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:1.0in">
<span><span style=3D"font-size:12.0pt;font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0</span><u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:1.0in">
<span><span style=3D"font-size:12.0pt;font-family:&quot;Arial&quot;,sans-se=
rif">Since we are at the open surgery of this draft there is one more point=
 which did not got resolved during our offline discussion. Feedback from WG=
 is welcome
 here.</span><u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:1.0in">
<span><span style=3D"font-size:12.0pt;font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0</span><u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:1.0in">
<span><span style=3D"font-size:12.0pt;font-family:&quot;Arial&quot;,sans-se=
rif">The draft RECOMMENDS the following procedure in case of a conflict:=C2=
=A0</span><u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:1.0in">
<span><span style=3D"font-size:12.0pt;font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0</span><u></u><u></u></span></p>
</div>
<div>
<pre style=3D"margin-left:1.0in;font-variant-ligatures:normal;font-variant-=
caps:normal;text-align:start;text-decoration-style:initial;text-decoration-=
color:initial;word-spacing:0px"><span><span style=3D"color:black">... it is=
 RECOMMENDED that the first prefix using the label index is selected.</span=
><u></u><u></u></span></pre>
<p class=3D"MsoNormal" style=3D"margin-left:1.0in">
<span><span style=3D"font-size:12.0pt;font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0</span><u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:1.0in">
<span><span style=3D"font-size:12.0pt;font-family:&quot;Arial&quot;,sans-se=
rif;color:#222222;background:white">In BGP there is no guarantee about orde=
red delivery of BGP prefixes.=C2=A0</span></span><span><span style=3D"font-=
size:12.0pt;font-family:&quot;Arial&quot;,sans-serif">=C2=A0It
 may work such in some specific topologies but not in any arbitrary one. So=
 if we recommend to pick one prefix on R1 and different prefix on R2 and in=
stall in forwarding the same SID for those I am afraid the data plane will =
get quite severely messed up and
 even finding it during troubleshooting will be quite hard.=C2=A0</span><u>=
</u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:1.0in">
<span><span style=3D"font-size:12.0pt;font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0</span><u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:1.0in">
<span><span style=3D"font-size:12.0pt;font-family:&quot;Arial&quot;,sans-se=
rif">Also as pointed out already MPLS anycast SID may on purpose use the sa=
me label across nodes according to=C2=A0draft-ietf-spring-mpls-<wbr>anycast=
-segments-02. Now
 if we want to accomplish the same in BGP we would need to advertise differ=
ent prefixes with the same SID (in MPLS-SR index). the above paragraph does=
 prevents that. Note that adding and advertising the _same_ prefix from dif=
ferent nodes will not work as BGP
 speakers may pick only one (best path) and use it for forwarding. IBGP or =
EBGP multipath may not always be enabled/use same set.</span><u></u><u></u>=
</span></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in">
<span>=C2=A0<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in">
<span>I don=E2=80=99t understand this concern either. The text applies to d=
ifference prefixes, not an anycast where multiple BGP speakers with adverti=
se the same &lt;prefix, SID&gt; tuple.
<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in">
<span>=C2=A0<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in">
<span>Thanks,<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in">
<span>Acee <u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:1.0in">
<span><span style=3D"font-size:12.0pt;font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0</span><u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:1.0in">
<span><span style=3D"font-size:12.0pt;font-family:&quot;Arial&quot;,sans-se=
rif">The crux of the issue when advertising SIDs in BGP is not so much abou=
t prefixes, but their next hops which unfortunately the draft does not even=
 mention
 once.</span><u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:1.0in">
<span><span style=3D"font-size:12.0pt;font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0</span><u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:1.0in">
<span><span style=3D"font-size:12.0pt;font-family:&quot;Arial&quot;,sans-se=
rif">Kind regards,</span><u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:1.0in">
<span><span style=3D"font-size:12.0pt;font-family:&quot;Arial&quot;,sans-se=
rif">Robert.=C2=A0</span><u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:1.0in">
<span><span style=3D"font-size:12.0pt;font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0</span><u></u><u></u></span></p>
</div>
</div>
</div>
</div>
</blockquote>
</div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span><u></u>=C2=A0<u></u=
></span></p>
</div>
</span></div>
</div>

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

--f40304389254867bab05657ffed7--


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From: Robert Raszuk <robert@raszuk.net>
Date: Sun, 18 Feb 2018 18:34:54 +0100
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To: "Ketan Talaulikar (ketant)" <ketant@cisco.com>
Cc: "Acee Lindem (acee)" <acee@cisco.com>, "idr@ietf.org" <idr@ietf.org>
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Subject: Re: [Idr] Review Updates to draft-ietf-idr-bgp-prefix-sid
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Hi Ketan,

Sorry for mixing two different and independent comments together in my msg
to Acee. One is about "first prefix selection" and let's keep it separate.

As far as anycast point I was talking about anycast SID/index not anycast
prefix. Yes for IP anycast prefix must be the same across nodes. But for SR
data plane I don't see this as such strong requirement.

Imagine R1 and R2 advertsing P1 and P2 with SID S. If you force that P1 &
P2 must be the same you must enable multipath on all the nodes to install S
with both next hops into dataplane.

Contrary if you allow same SID to be installed with different next hops
when it comes with different prefixes you don't have to worry about
multipath being enabled anywhere :). After all it should be up to operator
to decide how he wants to advertise his MPLS indexes.

Remember for mpls2mpls date plane what prefixes are advertised as part of
NLRI does not really matter ...

Anyhow I have a feeling that this discussion belongs to SPRING not to IDR
so let's move it there or take it offline.

Cheers,
R.


On Sun, Feb 18, 2018 at 1:16 PM, Ketan Talaulikar (ketant) <ketant@cisco.co=
m
> wrote:

> Hi Robert,
>
>
>
> I do hope this is not an open surgery of the draft J
>
>
>
> Regarding Anycast prefixes, my understanding was that this, by definition=
,
> means the same prefix being multi-home and originated by more than one
> routers. I did not follow anycast with different prefixes.
>
>
>
> Also, the handling of anycast involves either of the following:
>
> 1)     Pointing to the =E2=80=9Cclosest=E2=80=9D (best on whatever the de=
cision process
> of the protocol involved) originator of the prefix, OR
>
> 2)     Doing load-balancing between the multiple originators (when this
> is possibled/desired).
>
>
>
> So I am not sure I understood the relationship of anycast to the conflict=
.
>
>
>
> Thanks,
>
> Ketan
>
>
>
> *From:* Idr [mailto:idr-bounces@ietf.org] *On Behalf Of *Robert Raszuk
> *Sent:* 18 February 2018 16:27
> *To:* Acee Lindem (acee) <acee@cisco.com>
> *Cc:* idr@ietf.org
> *Subject:* Re: [Idr] Review Updates to draft-ietf-idr-bgp-prefix-sid
>
>
>
> Hi Acee,
>
>
>
> Since we are at the open surgery of this draft there is one more point
> which did not got resolved during our offline discussion. Feedback from W=
G
> is welcome here.
>
>
>
> The draft RECOMMENDS the following procedure in case of a conflict:
>
>
>
> ... it is RECOMMENDED that the first prefix using the label index is sele=
cted.
>
>
>
> In BGP there is no guarantee about ordered delivery of BGP prefixes.  It
> may work such in some specific topologies but not in any arbitrary one. S=
o
> if we recommend to pick one prefix on R1 and different prefix on R2 and
> install in forwarding the same SID for those I am afraid the data plane
> will get quite severely messed up and even finding it during
> troubleshooting will be quite hard.
>
>
>
> Also as pointed out already MPLS anycast SID may on purpose use the same
> label across nodes according to draft-ietf-spring-mpls-anycast-segments-0=
2.
> Now if we want to accomplish the same in BGP we would need to advertise
> different prefixes with the same SID (in MPLS-SR index). the above
> paragraph does prevents that. Note that adding and advertising the _same_
> prefix from different nodes will not work as BGP speakers may pick only o=
ne
> (best path) and use it for forwarding. IBGP or EBGP multipath may not
> always be enabled/use same set.
>
>
>
> The crux of the issue when advertising SIDs in BGP is not so much about
> prefixes, but their next hops which unfortunately the draft does not even
> mention once.
>
>
>
> Kind regards,
>
> Robert.
>
>
>

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<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small">Hi Ketan,</div><div class=3D"gmail_defa=
ult" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br><=
/div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans=
-serif;font-size:small">Sorry for mixing two different and independent comm=
ents together in my msg to Acee. One is about &quot;first prefix selection&=
quot; and let&#39;s keep it separate.=C2=A0</div><div class=3D"gmail_defaul=
t" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></d=
iv><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-s=
erif;font-size:small">As far as anycast point I was talking about anycast S=
ID/index not anycast prefix. Yes for IP anycast prefix must be the same acr=
oss nodes. But for SR data plane I don&#39;t see this as such strong requir=
ement.=C2=A0</div><div class=3D"gmail_default" style=3D"font-family:arial,h=
elvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_default"=
 style=3D"font-family:arial,helvetica,sans-serif;font-size:small">Imagine R=
1 and R2 advertsing P1 and P2 with SID S. If you force that P1 &amp; P2 mus=
t be the same you must enable multipath on all the nodes to install S with =
both next hops into dataplane.=C2=A0</div><div class=3D"gmail_default" styl=
e=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></div><div=
 class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;fo=
nt-size:small">Contrary if you allow same SID to be installed with differen=
t next hops when it comes with different prefixes you don&#39;t have to wor=
ry about multipath being enabled anywhere :). After all it should be up to =
operator to decide how he wants to advertise his MPLS indexes.=C2=A0</div><=
div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif=
;font-size:small"><br></div><div class=3D"gmail_default" style=3D"font-fami=
ly:arial,helvetica,sans-serif;font-size:small">Remember for mpls2mpls date =
plane what prefixes are advertised as part of NLRI does not really matter .=
..</div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,s=
ans-serif;font-size:small"><br></div><div class=3D"gmail_default" style=3D"=
font-family:arial,helvetica,sans-serif;font-size:small">Anyhow I have a fee=
ling that this discussion belongs to SPRING not to IDR so let&#39;s move it=
 there or take it offline.=C2=A0</div><div class=3D"gmail_default" style=3D=
"font-family:arial,helvetica,sans-serif;font-size:small"><br></div><div cla=
ss=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-s=
ize:small">Cheers,<br>R.</div><div class=3D"gmail_default" style=3D"font-fa=
mily:arial,helvetica,sans-serif;font-size:small"><br></div></div><div class=
=3D"gmail_extra"><br><div class=3D"gmail_quote">On Sun, Feb 18, 2018 at 1:1=
6 PM, Ketan Talaulikar (ketant) <span dir=3D"ltr">&lt;<a href=3D"mailto:ket=
ant@cisco.com" target=3D"_blank">ketant@cisco.com</a>&gt;</span> wrote:<br>=
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">





<div lang=3D"EN-IN" link=3D"#0563C1" vlink=3D"#954F72">
<div class=3D"m_2987627722708078728WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Hi Robert,<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">I do hope this is not an open surgery=
 of the draft
</span><span style=3D"font-size:11.0pt;font-family:Wingdings;color:#1f497d"=
>J</span><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1f497d"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Regarding Anycast prefixes, my unders=
tanding was that this, by definition, means the same prefix being multi-hom=
e and originated by
 more than one routers. I did not follow anycast with different prefixes.<u=
></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Also, the handling of anycast involve=
s either of the following:<u></u><u></u></span></p>
<p class=3D"m_2987627722708078728MsoListParagraph"><u></u><span style=3D"fo=
nt-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1f497d"><s=
pan>1)<span style=3D"font:7.0pt &quot;Times New Roman&quot;">=C2=A0=C2=A0=
=C2=A0=C2=A0
</span></span></span><u></u><span style=3D"font-size:11.0pt;font-family:&qu=
ot;Calibri&quot;,sans-serif;color:#1f497d">Pointing to the =E2=80=9Cclosest=
=E2=80=9D (best on whatever the decision process of the protocol involved) =
originator of the prefix, OR<u></u><u></u></span></p>
<p class=3D"m_2987627722708078728MsoListParagraph"><u></u><span style=3D"fo=
nt-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1f497d"><s=
pan>2)<span style=3D"font:7.0pt &quot;Times New Roman&quot;">=C2=A0=C2=A0=
=C2=A0=C2=A0
</span></span></span><u></u><span style=3D"font-size:11.0pt;font-family:&qu=
ot;Calibri&quot;,sans-serif;color:#1f497d">Doing load-balancing between the=
 multiple originators (when this is possibled/desired).<u></u><u></u></span=
></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">So I am not sure I understood the rel=
ationship of anycast to the conflict.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Thanks,<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Ketan<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:11.0pt;fo=
nt-family:&quot;Calibri&quot;,sans-serif">From:</span></b><span lang=3D"EN-=
US" style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif"> =
Idr [mailto:<a href=3D"mailto:idr-bounces@ietf.org" target=3D"_blank">idr-b=
ounces@ietf.org</a>]
<b>On Behalf Of </b>Robert Raszuk<br>
<b>Sent:</b> 18 February 2018 16:27<br>
<b>To:</b> Acee Lindem (acee) &lt;<a href=3D"mailto:acee@cisco.com" target=
=3D"_blank">acee@cisco.com</a>&gt;<br>
<b>Cc:</b> <a href=3D"mailto:idr@ietf.org" target=3D"_blank">idr@ietf.org</=
a><span class=3D""><br>
<b>Subject:</b> Re: [Idr] Review Updates to draft-ietf-idr-bgp-prefix-sid<u=
></u><u></u></span></span></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">Hi Acee,<u></u><u></u></span></p>
</div><div><div class=3D"h5">
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">Since we are at the open surgery of this draft there is one more point=
 which did not got resolved during our offline discussion. Feedback from WG=
 is welcome here.<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">The draft RECOMMENDS the following procedure in case of a conflict:=C2=
=A0<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<pre style=3D"font-variant-ligatures:normal;font-variant-caps:normal;text-a=
lign:start;text-decoration-style:initial;text-decoration-color:initial;word=
-spacing:0px"><span style=3D"color:black">... it is RECOMMENDED that the fi=
rst prefix using the label index is selected.<u></u><u></u></span></pre>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif;color:#222222;background:white">In BGP there is no guarantee about orde=
red delivery of BGP prefixes.=C2=A0</span><span style=3D"font-family:&quot;=
Arial&quot;,sans-serif">=C2=A0It may work such in some specific topologies
 but not in any arbitrary one. So if we recommend to pick one prefix on R1 =
and different prefix on R2 and install in forwarding the same SID for those=
 I am afraid the data plane will get quite severely messed up and even find=
ing it during troubleshooting will
 be quite hard.=C2=A0<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">Also as pointed out already MPLS anycast SID may on purpose use the sa=
me label across nodes according to=C2=A0draft-ietf-spring-mpls-<wbr>anycast=
-segments-02. Now if we want to accomplish the same in BGP
 we would need to advertise different prefixes with the same SID (in MPLS-S=
R index). the above paragraph does prevents that. Note that adding and adve=
rtising the _same_ prefix from different nodes will not work as BGP speaker=
s may pick only one (best path)
 and use it for forwarding. IBGP or EBGP multipath may not always be enable=
d/use same set.<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">The crux of the issue when advertising SIDs in BGP is not so much abou=
t prefixes, but their next hops which unfortunately the draft does not even=
 mention once.<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">Kind regards,<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">Robert.=C2=A0<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><u></u>=C2=A0<u></u></span></p>
</div>
</div></div></div>
</div>
</div>

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

--089e082f8844ec579005657ffef7--


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On February 17, 2018 at 3:41:02 PM, Acee Lindem (acee) (acee@cisco.com)
wrote:

Acee:

Hi!

There is one more change we=E2=80=99d like to make to the draft that requir=
es WG
approval. One revelation during the review process for this draft is that
the SRv6 use case as currently documented isn=E2=80=99t really that compell=
ing and
there are some details that are unspecified. Other than validation, the
IPv6 SID TLV hasn=E2=80=99t been implemented. Consequently, we=E2=80=99d li=
ke to remove the
IPv6 SID TLV and SRv6 dataplane specification from the draft. Are there any
objections (other than the obvious one that it is very late to be making
this change)?



Here are a list of implementations and none have implemented the IPv6 SID:

https://trac.ietf.org/trac/idr/wiki/draft-ietf-idr-bgp-prefix-sid%20impleme=
ntations



Note that the code point for the IPv6 SID would be deprecated since
validation has been implemented in several implementations.



If there are no objections, I could make this change next week and we could
allow for an additional week for review.


This is a significant change!  Thanks for specifically pointing out the
lack support in the implementations for the IPv6 SID.  Please consider
adding an rfc7942-style section to the document.

While I don=E2=80=99t have a specific objection to you simplifying the docu=
ment, it
is a decision that shouldn=E2=80=99t be made *after* the IESG has approved =
the
publication of the document.  OTOH, better late than never!

idr-chairs:  I am returning the document to the WG for discussion and
update.  If the WG reaches consensus on the proposed changes, I want to
make sure that it is done with the understanding that the related IPv6 work
will be done later.  IOW, the result should not be that the IPv6 work is
abandoned =E2=80=94 I am sure that is not the intent.  Note that we don=E2=
=80=99t need to
discuss or adopt a specific alternative before processing this document.

Thanks!

Alvaro.

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<html><head><style>body{font-family:Helvetica,Arial;font-size:13px}</style>=
</head><body style=3D"word-wrap:break-word"><div id=3D"bloop_customfont" st=
yle=3D"color:rgb(0,0,0);margin:0px"><font face=3D"Helvetica">On February 17=
, 2018 at 3:41:02 PM, Acee Lindem (acee) (<a href=3D"mailto:acee@cisco.com"=
>acee@cisco.com</a>) wrote:</font></div><div id=3D"bloop_customfont" style=
=3D"color:rgb(0,0,0);margin:0px"><font face=3D"Helvetica"><br></font></div>=
<div id=3D"bloop_customfont" style=3D"color:rgb(0,0,0);margin:0px"><font fa=
ce=3D"Helvetica">Acee:</font></div><div id=3D"bloop_customfont" style=3D"co=
lor:rgb(0,0,0);margin:0px"><font face=3D"Helvetica"><br></font></div><div i=
d=3D"bloop_customfont" style=3D"color:rgb(0,0,0);margin:0px"><font face=3D"=
Helvetica">Hi!</font></div><div id=3D"bloop_customfont" style=3D"color:rgb(=
0,0,0);margin:0px"><font face=3D"Helvetica"><br></font></div> <blockquote t=
ype=3D"cite" class=3D"clean_bq"><span><div><font face=3D"Helvetica"><p clas=
s=3D"MsoNormal" style=3D"margin:0in 0in 0.0001pt;color:rgb(0,0,0);font-vari=
ant-caps:normal;letter-spacing:normal;text-align:start;text-indent:0px;text=
-transform:none;white-space:normal;word-spacing:0px">There is one more chan=
ge we=E2=80=99d like to make to the draft that requires WG approval. One re=
velation during the review process for this draft is that the SRv6 use case=
 as currently documented isn=E2=80=99t really that compelling and there are=
 some details that are unspecified. Other than validation, the IPv6 SID TLV=
 hasn=E2=80=99t been implemented. Consequently, we=E2=80=99d like to remove=
 the IPv6 SID TLV and SRv6 dataplane specification from the draft. Are ther=
e any objections (other than the obvious one that it is very late to be mak=
ing this change)?<span class=3D"Apple-converted-space">=C2=A0</span></p><p =
class=3D"MsoNormal" style=3D"margin:0in 0in 0.0001pt;color:rgb(0,0,0);font-=
variant-caps:normal;letter-spacing:normal;text-align:start;text-indent:0px;=
text-transform:none;white-space:normal;word-spacing:0px">=C2=A0=C2=A0=C2=A0=
</p><p class=3D"MsoNormal" style=3D"margin:0in 0in 0.0001pt;color:rgb(0,0,0=
);font-variant-caps:normal;letter-spacing:normal;text-align:start;text-inde=
nt:0px;text-transform:none;white-space:normal;word-spacing:0px">Here are a =
list of implementations and none have implemented the IPv6 SID:</p><p class=
=3D"MsoNormal" style=3D"margin:0in 0in 0.0001pt;color:rgb(0,0,0);font-varia=
nt-caps:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-=
transform:none;white-space:normal;word-spacing:0px"></p><p class=3D"MsoNorm=
al" style=3D"margin:0in 0in 0.0001pt;color:rgb(0,0,0);font-variant-caps:nor=
mal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:n=
one;white-space:normal;word-spacing:0px"><a href=3D"https://trac.ietf.org/t=
rac/idr/wiki/draft-ietf-idr-bgp-prefix-sid%20implementations" style=3D"colo=
r:purple;text-decoration:underline">https://trac.ietf.org/trac/idr/wiki/dra=
ft-ietf-idr-bgp-prefix-sid%20implementations</a></p><p class=3D"MsoNormal" =
style=3D"margin:0in 0in 0.0001pt;color:rgb(0,0,0);font-variant-caps:normal;=
letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;=
white-space:normal;word-spacing:0px">=C2=A0</p><p class=3D"MsoNormal" style=
=3D"margin:0in 0in 0.0001pt;color:rgb(0,0,0);font-variant-caps:normal;lette=
r-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white=
-space:normal;word-spacing:0px">Note that the code point for the IPv6 SID w=
ould be deprecated since validation has been implemented in several impleme=
ntations. =C2=A0</p><p class=3D"MsoNormal" style=3D"margin:0in 0in 0.0001pt=
;color:rgb(0,0,0);font-variant-caps:normal;letter-spacing:normal;text-align=
:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:=
0px">=C2=A0</p><p class=3D"MsoNormal" style=3D"margin:0in 0in 0.0001pt;colo=
r:rgb(0,0,0);font-variant-caps:normal;letter-spacing:normal;text-align:star=
t;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px">=
If there are no objections, I could make this change next week and we could=
 allow for an additional week for review.</p></font></div></span></blockquo=
te> <div id=3D"bloop_sign_1519144229685068032" class=3D"bloop_sign"></div><=
div id=3D"bloop_sign_1519144229685068032" class=3D"bloop_sign"><font face=
=3D"Helvetica"><br></font></div><div id=3D"bloop_sign_1519144229685068032" =
class=3D"bloop_sign"><font face=3D"Helvetica">This is a significant change!=
=C2=A0 Thanks for specifically pointing out the lack support in the impleme=
ntations for the IPv6 SID.=C2=A0 Please consider adding an rfc7942-style se=
ction to the document.</font></div><div id=3D"bloop_sign_151914422968506803=
2" class=3D"bloop_sign"><font face=3D"Helvetica"><br></font></div><div id=
=3D"bloop_sign_1519144229685068032" class=3D"bloop_sign"><font face=3D"Helv=
etica">While I don=E2=80=99t have a specific objection to you simplifying t=
he document, it is a decision that shouldn=E2=80=99t be made *after* the IE=
SG has approved the publication of the document.=C2=A0 OTOH, better late th=
an never!</font></div><div id=3D"bloop_sign_1519144229685068032" class=3D"b=
loop_sign"><font face=3D"Helvetica"><br></font></div><div id=3D"bloop_sign_=
1519144229685068032" class=3D"bloop_sign"><font face=3D"Helvetica">idr-chai=
rs: =C2=A0I am returning the document to the WG for discussion and update.=
=C2=A0 If the WG reaches consensus on the proposed changes, I want to make =
sure that it is done with the understanding that the related IPv6 work will=
 be done later.=C2=A0 IOW, the result should not be that the IPv6 work is a=
bandoned =E2=80=94 I am sure that is not the intent.=C2=A0 Note that we don=
=E2=80=99t need to discuss or adopt a specific alternative before processin=
g this document.</font></div><div id=3D"bloop_sign_1519144229685068032" cla=
ss=3D"bloop_sign"><font face=3D"Helvetica"><br></font></div><div id=3D"bloo=
p_sign_1519144229685068032" class=3D"bloop_sign"><font face=3D"Helvetica">T=
hanks!</font></div><div id=3D"bloop_sign_1519144229685068032" class=3D"bloo=
p_sign"><font face=3D"Helvetica"><br></font></div><div id=3D"bloop_sign_151=
9144229685068032" class=3D"bloop_sign"><font face=3D"Helvetica">Alvaro.</fo=
nt></div></body></html>

--001a113d74ea1eb7170565a951ca--


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Subject: [Idr] I-D Action: draft-ietf-idr-bgp-prefix-sid-17.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Inter-Domain Routing WG of the IETF.

        Title           : Segment Routing Prefix SID extensions for BGP
        Authors         : Stefano Previdi
                          Clarence Filsfils
                          Acee Lindem
                          Arjun Sreekantiah
                          Hannes Gredler
	Filename        : draft-ietf-idr-bgp-prefix-sid-17.txt
	Pages           : 16
	Date            : 2018-02-20

Abstract:
   The Segment Routing (SR) architecture allows a node to steer a packet
   flow through any topological path and service chain by leveraging
   source routing.  The ingress node prepends an SR header to a packet
   containing a set of segment identifiers (SID).  Each SID represents a
   topological or a service-based instruction.  Per-flow state is
   maintained only on the ingress node of the SR domain.

   This document defines an optional, transitive BGP attribute for
   announcing BGP Prefix Segment Identifiers (BGP Prefix-SID)
   information.



The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-idr-bgp-prefix-sid/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-idr-bgp-prefix-sid-17
https://datatracker.ietf.org/doc/html/draft-ietf-idr-bgp-prefix-sid-17

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-idr-bgp-prefix-sid-17


Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/


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From: PVLR Pavana Murthy <pvlrpm@gmail.com>
Date: Wed, 21 Feb 2018 12:22:00 +0530
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Subject: Re: [Idr] The Use of 'm' and 'not' bits in bitmask Flowspec component.
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--f403045f525e3196760565b35de4
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 Hi Christoph,
   The following is given in the RFC.

  0   1   2   3   4   5   6   7
+---+---+---+---+---+---+---+---+
| e | a |   len | 0 | 0 |not| m |
+---+---+---+---+---+---+---+---+

not - NOT bit. If set, logical negation of operation.

m - Match bit. If set, this is a bitwise match operation
defined as "(data & value) =3D=3D value"; if unset, (data &
value) evaluates to TRUE if any of the bits in the value
mask are set in the data.


I will try to use all the combinations of 'not' and 'm' bits. Please let me
know if the following my understanding is correct.

I will try to use the mask with SYN, ACK bits of TCP header for this.
[CWR ECE URG ACK PSH RST SYN FIN]
mask =3D 0x12


   1. not-0, m-0  (data & mask) !=3D 0 i.e. either SYN or ACK bits should
   have been set in TCP header.
   2. not-0, m-1  (data & mask)  =3D=3D mask i.e. SYN and ACK bits both sho=
uld
   be set in TCP header.
   3. not-1,m-0   (data & mask) =3D=3D 0    i.e. both SYN and  ACK bits sho=
uld
   not  be set in TCP header.
   4. not-1, m-1  (data & mask) !=3D mask i.e. at least one of  SYN or ACK
   bits should not be set in TCP header.


Thanks,
Pavana.



On Thu, Feb 15, 2018 at 2:35 PM, PVLR Pavana Murthy <pvlrpm@gmail.com>
wrote:

> Hi Christoph,
>    Thanks a lot for the detailed explanation. That answers my question
> completely :-).
>
>
>
> On Thu, Feb 15, 2018 at 1:07 PM, Christoph Loibl <c@tix.at> wrote:
>
>> Hi Pavana,
>>
>> You can rather easily test the behaviour when you feed your case into th=
e
>> python function:
>>
>> def main():
>>     fs1 =3D FS_nlri(components=3D[
>>         FS_component(component_type=3DIP_DESTINATION,
>> value=3Dipaddress.ip_network('88.88.88.0/24')),
>>         FS_component(component_type=3D4, value=3Dbytearray([0x01, 0x46, =
0x81,
>> 0x50]))
>>     ])
>>
>>     fs2 =3D FS_nlri(components=3D[
>>         FS_component(component_type=3DIP_DESTINATION,
>> value=3Dipaddress.ip_network('88.88.88.0/24')),
>>         FS_component(component_type=3D4, value=3Dbytearray([0x03, 0x5a, =
0xc5,
>> 0x6e]))
>>     ])
>>     print(flow_rule_cmp(fs1, fs2))
>>
>> What happens is (I refer to line numbers of the code in the github repo
>> https://github.com/stoffi92/flowspec-cmp/blob/master/flow_cmp.py :
>>
>> *) The IP components are compared and as you mentioned: no decision can
>> be made since the ip components are equal. (we reach line 74 for the equ=
al
>> ip components and continue with the next iteration)
>>
>> *) The second component _types_ are equal but not IP (we end up in the
>> branch in line 80 since the components are type=3D4 and not 1 or 2)
>>
>> *) The length of the second components is compared and equal, so we
>> continue in line 82
>>
>> ** See below: this is basically where the compare that you asked for
>> happens **
>>
>> *) Now we come to the point where we compare the string of bytes one by
>> one. As long as they are equal. (this is basically what memcmp does - th=
is
>> is not very explicit in the python code, since it is done by the <, >
>> operators for the bytearray implicitly)
>>
>> In your case what it does is, that it compares 0x01 to 0x03 and figures
>> out that 0x01 is the lower value so it takes the branch in line 84 and
>> returns with A_HAS_PRECEDENCE from line 85 (if both of your components
>> would start with 0x01 it would continue to the second byte and so on).
>>
>> Your first FS nlri has precedence because of the =E2=80=9Clower=E2=80=9D=
 value.
>>
>> 01 *18 58 58 58* 04 *01 46 81 50  ----> Dst.Prefix: 88.88.88.0/24
>>> <http://88.88.88.0/24>  Port: 70 | 80*
>>>
>>>
>> Discamer: I assumed that you encoded the components themselfs correctly
>> (the 01 46 81 50 and 03 5a c5 6e)
>>
>> Does this answer your question?
>>
>> Christoph
>>
>> --
>> Christoph Loibl
>> c@tix.at | CL8-RIPE | PGP-Key-ID: 0x4B2C0055 | http://www.nextlayer.at
>>
>>
>>
>> On 15.02.2018, at 05:08, PVLR Pavana Murthy <pvlrpm@gmail.com> wrote:
>>
>> Hi Christoph,
>>   Even in the  RFC5575bis,  the following is given  for comparing
>> non-prefix type components.
>>
>>  else:
>>                # assuming comp_a.value, comp_b.value of type bytearray
>>                if len(comp_a.value) =3D=3D len(comp_b.value):
>>                    if comp_a.value > comp_b.value:
>>                        return B_HAS_PRECEDENCE
>>                    if comp_a.value < comp_b.value:
>>                        return A_HAS_PRECEDENCE
>>                    # components equal -> continue with next component
>>                else:
>>                    common =3D min(len(comp_a.value), len(comp_b.value))
>>                    if comp_a.value[:common] > comp_b.value[:common]:
>>                        return B_HAS_PRECEDENCE
>>                    elif comp_a.value[:common] < comp_b.value[:common]:
>>                        return A_HAS_PRECEDENCE
>>                    # the first common bytes match
>>                    elif len(comp_a.value) > len(comp_b.value):
>>                        return A_HAS_PRECEDENCE
>>                    else:
>>                        return B_HAS_PRECEDENCE
>>
>>
>> *What is  comp_a.value here ? Is it the binary sting of [op, value]/[op,=
bitmask] or only value/bitmask ?*
>>
>>
>> Thanks,
>>
>> Pavana.
>>
>>
>> On Thu, Feb 15, 2018 at 3:11 AM, Christoph Loibl <c@tix.at> wrote:
>>
>>> Hi Pavana,
>>>
>>> Did you have a look into the actual code (thanks to Job=E2=80=99s comme=
nt) that
>>> is contained in the RFC5575bis draft which should be identical from the
>>> behaviour:
>>>
>>> https://tools.ietf.org/html/draft-ietf-idr-rfc5575bis-06
>>>
>>> Christoph
>>>
>>> --
>>> Christoph Loibl
>>> c@tix.at | CL8-RIPE | PGP-Key-ID: 0x4B2C0055 | http://www.nextlayer.at
>>>
>>>
>>>
>>> On 12.02.2018, at 12:03, PVLR Pavana Murthy <pvlrpm@gmail.com> wrote:
>>>
>>> Hello,
>>>   In the RFC 5575, the following is given for the comparing the Flowspe=
c
>>> components of types other then prefix.
>>>
>>> } else {
>>> common =3D
>>> MIN(component_length(comp1), component_length(comp2));
>>> cmp =3D memcmp(data(comp1), data(comp2), common);
>>> // not equal, lowest value has precedence
>>> // equal, longest string has precedence
>>> }
>>>
>>>
>>> Here, what does *data* refrer to  ?
>>>
>>> Is it the binary form of 1) [op, value]> / [op, bitmask]  or 2) Just
>>> [value] / [bitmask]
>>>
>>> eg:
>>>
>>>
>>> 1)  01 *18 58 58 58* 04 *01 46 81 50  ----> Dst.Prefix: 88.88.88.0/24
>>> <http://88.88.88.0/24>  Port: 70 | 80*
>>>
>>> 2)  01* 18 58 58 58 *04* 03 5a c5 6e    ---->   Dst.Prefix:
>>> 88.88.88.0/24 <http://88.88.88.0/24>  Port: >=3D90 & <=3D 110*
>>>
>>> *In the above FS rules,  Dst. Prefix is same in both, so we need to
>>> compare the data of next type 4 (Port). *
>>> *So do we need to do memcmp of  (01 46 81 50) and  (03 5a c5 6e) ?*
>>>
>>> Thanks,
>>> Pavana*.*
>>>
>>>
>>>
>>> _______________________________________________
>>> Idr mailing list
>>> Idr@ietf.org
>>> https://www.ietf.org/mailman/listinfo/idr
>>>
>>>
>>>
>>
>>
>

--f403045f525e3196760565b35de4
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">

<font face=3D"verdana, sans-serif" style=3D"color:rgb(34,34,34);font-size:s=
mall;font-style:normal;font-variant-ligatures:normal;font-variant-caps:norm=
al;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;t=
ext-transform:none;white-space:normal;word-spacing:0px;background-color:rgb=
(255,255,255);text-decoration-style:initial;text-decoration-color:initial">=
Hi Christoph,</font><div style=3D"color:rgb(34,34,34);font-family:arial,san=
s-serif;font-size:small;font-style:normal;font-variant-ligatures:normal;fon=
t-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:star=
t;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;b=
ackground-color:rgb(255,255,255);text-decoration-style:initial;text-decorat=
ion-color:initial"><font face=3D"verdana, sans-serif">=C2=A0 =C2=A0The foll=
owing is given in the RFC</font>.=C2=A0</div><div style=3D"color:rgb(34,34,=
34);font-family:arial,sans-serif;font-size:small;font-style:normal;font-var=
iant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spaci=
ng:normal;text-align:start;text-indent:0px;text-transform:none;white-space:=
normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-s=
tyle:initial;text-decoration-color:initial"><br></div><div style=3D"color:r=
gb(34,34,34);font-family:arial,sans-serif;font-size:small;font-style:normal=
;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;let=
ter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;whi=
te-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-dec=
oration-style:initial;text-decoration-color:initial"><div><font face=3D"mon=
ospace, monospace">=C2=A0 0=C2=A0 =C2=A01=C2=A0 =C2=A02=C2=A0 =C2=A03=C2=A0=
 =C2=A04=C2=A0 =C2=A05=C2=A0 =C2=A06=C2=A0 =C2=A07</font></div><div><font f=
ace=3D"monospace, monospace">+---+---+---+---+---+---+---+-<wbr>--+</font><=
/div><div><font face=3D"monospace, monospace">| e | a |=C2=A0 =C2=A0len | 0=
 | 0 |not| m |</font></div><div><font face=3D"monospace, monospace">+---+--=
-+---+---+---+---+---+-<wbr>--+</font></div><div><br></div><div><font face=
=3D"monospace, monospace">not - NOT bit. If set, logical negation of operat=
ion.</font></div><div><font face=3D"monospace, monospace"><br></font></div>=
<div><font face=3D"monospace, monospace">m - Match bit. If set, this is a b=
itwise match operation</font></div><div><font face=3D"monospace, monospace"=
>defined as &quot;(data &amp; value) =3D=3D value&quot;; if unset, (data &a=
mp;</font></div><div><font face=3D"monospace, monospace">value) evaluates t=
o TRUE if any of the bits in the value</font></div><div><font face=3D"monos=
pace, monospace">mask are set in the data.</font></div><div><br></div></div=
><div style=3D"color:rgb(34,34,34);font-family:arial,sans-serif;font-size:s=
mall;font-style:normal;font-variant-ligatures:normal;font-variant-caps:norm=
al;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;t=
ext-transform:none;white-space:normal;word-spacing:0px;background-color:rgb=
(255,255,255);text-decoration-style:initial;text-decoration-color:initial">=
<font face=3D"verdana, sans-serif"><br></font></div><div style=3D"color:rgb=
(34,34,34);font-family:arial,sans-serif;font-size:small;font-style:normal;f=
ont-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;lette=
r-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white=
-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decor=
ation-style:initial;text-decoration-color:initial"><font face=3D"verdana, s=
ans-serif">I will try to use all the combinations of &#39;not&#39; and &#39=
;m&#39; bits. Please let me know if the following my understanding is corre=
ct.=C2=A0</font></div><div style=3D"color:rgb(34,34,34);font-family:arial,s=
ans-serif;font-size:small;font-style:normal;font-variant-ligatures:normal;f=
ont-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:st=
art;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px=
;background-color:rgb(255,255,255);text-decoration-style:initial;text-decor=
ation-color:initial"><font face=3D"verdana, sans-serif"><br></font></div><d=
iv style=3D"color:rgb(34,34,34);font-family:arial,sans-serif;font-size:smal=
l;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;=
font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text=
-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(25=
5,255,255);text-decoration-style:initial;text-decoration-color:initial"><fo=
nt face=3D"verdana, sans-serif">I will try to use the mask with SYN, ACK bi=
ts of TCP header for this.</font></div><div style=3D"color:rgb(34,34,34);fo=
nt-family:arial,sans-serif;font-size:small;font-style:normal;font-variant-l=
igatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:nor=
mal;text-align:start;text-indent:0px;text-transform:none;white-space:normal=
;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:i=
nitial;text-decoration-color:initial"><font face=3D"verdana, sans-serif">[C=
WR ECE URG ACK PSH RST SYN FIN]<br></font></div><div style=3D"color:rgb(34,=
34,34);font-family:arial,sans-serif;font-size:small;font-style:normal;font-=
variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-sp=
acing:normal;text-align:start;text-indent:0px;text-transform:none;white-spa=
ce:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoratio=
n-style:initial;text-decoration-color:initial"><font face=3D"verdana, sans-=
serif">mask =3D 0x12</font></div><div style=3D"color:rgb(34,34,34);font-fam=
ily:arial,sans-serif;font-size:small;font-style:normal;font-variant-ligatur=
es:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;te=
xt-align:start;text-indent:0px;text-transform:none;white-space:normal;word-=
spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial=
;text-decoration-color:initial"><font face=3D"monospace, monospace"><br></f=
ont></div><div style=3D"color:rgb(34,34,34);font-family:arial,sans-serif;fo=
nt-size:small;font-style:normal;font-variant-ligatures:normal;font-variant-=
caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-ind=
ent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-=
color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:=
initial"><ol><li><font face=3D"verdana, sans-serif">not-0, m-0=C2=A0 (data =
&amp; mask) !=3D 0 i.e. either SYN or ACK bits should have been set in TCP =
header.</font></li><li><font face=3D"verdana, sans-serif">not-0, m-1=C2=A0 =
(data &amp; mask)=C2=A0 =3D=3D mask i.e. SYN and ACK bits both should be se=
t in TCP header.</font></li><li><font face=3D"verdana, sans-serif">not-1,m-=
0=C2=A0 =C2=A0(data &amp; mask) =3D=3D 0=C2=A0 =C2=A0 i.e. both SYN and=C2=
=A0 ACK bits should not=C2=A0 be set in TCP header.</font></li><li><font fa=
ce=3D"verdana, sans-serif">not-1, m-1=C2=A0 (data &amp; mask) !=3D mask i.e=
. at least one of=C2=A0 SYN or ACK bits should not be set in TCP header.</f=
ont></li></ol><div><br></div></div><div style=3D"color:rgb(34,34,34);font-f=
amily:arial,sans-serif;font-size:small;font-style:normal;font-variant-ligat=
ures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;=
text-align:start;text-indent:0px;text-transform:none;white-space:normal;wor=
d-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initi=
al;text-decoration-color:initial"><font face=3D"verdana, sans-serif">Thanks=
,</font></div><div style=3D"color:rgb(34,34,34);font-family:arial,sans-seri=
f;font-size:small;font-style:normal;font-variant-ligatures:normal;font-vari=
ant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text=
-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;backgro=
und-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-co=
lor:initial"><font face=3D"verdana, sans-serif">Pavana.</font></div><div st=
yle=3D"color:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;fon=
t-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-=
weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-tran=
sform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255=
,255);text-decoration-style:initial;text-decoration-color:initial"><font fa=
ce=3D"monospace, monospace">=C2=A0</font></div>

<br><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">On Thu, Feb 1=
5, 2018 at 2:35 PM, PVLR Pavana Murthy <span dir=3D"ltr">&lt;<a href=3D"mai=
lto:pvlrpm@gmail.com" target=3D"_blank">pvlrpm@gmail.com</a>&gt;</span> wro=
te:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-=
left:1px #ccc solid;padding-left:1ex"><div dir=3D"ltr">Hi Christoph,<div>=
=C2=A0 =C2=A0Thanks a lot for the detailed explanation. That answers my que=
stion completely :-).</div><div><br></div><div><br></div></div><div class=
=3D"HOEnZb"><div class=3D"h5"><div class=3D"gmail_extra"><br><div class=3D"=
gmail_quote">On Thu, Feb 15, 2018 at 1:07 PM, Christoph Loibl <span dir=3D"=
ltr">&lt;<a href=3D"mailto:c@tix.at" target=3D"_blank">c@tix.at</a>&gt;</sp=
an> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;=
border-left:1px #ccc solid;padding-left:1ex"><div style=3D"word-wrap:break-=
word;line-break:after-white-space">Hi Pavana,<div><br></div><div>You can ra=
ther easily test the behaviour when you feed your case into the python func=
tion:</div><div><br></div><div><div><font face=3D"Courier" size=3D"1">def m=
ain():</font></div><div><font face=3D"Courier" size=3D"1">=C2=A0 =C2=A0 fs1=
 =3D FS_nlri(components=3D[</font></div><div><font face=3D"Courier" size=3D=
"1">=C2=A0 =C2=A0 =C2=A0 =C2=A0 FS_component(component_type=3DIP<wbr>_DESTI=
NATION, value=3Dipaddress.ip_network(&#39;<a href=3D"http://88.88.88.0/24&#=
39;)" target=3D"_blank">88<wbr>.88.88.0/24&#39;)</a>),</font></div><div><fo=
nt face=3D"Courier" size=3D"1">=C2=A0 =C2=A0 =C2=A0 =C2=A0 FS_component(com=
ponent_type=3D4, value=3Dbytearray([0x01, 0x46, 0x81, 0x50]))</font></div><=
div><font face=3D"Courier" size=3D"1">=C2=A0 =C2=A0 ])</font></div><div><fo=
nt face=3D"Courier" size=3D"1"><br></font></div><div><font face=3D"Courier"=
 size=3D"1">=C2=A0 =C2=A0 fs2 =3D FS_nlri(components=3D[</font></div><div><=
font face=3D"Courier" size=3D"1">=C2=A0 =C2=A0 =C2=A0 =C2=A0 FS_component(c=
omponent_type=3DIP<wbr>_DESTINATION, value=3Dipaddress.ip_network(&#39;<a h=
ref=3D"http://88.88.88.0/24&#39;)" target=3D"_blank">88<wbr>.88.88.0/24&#39=
;)</a>),</font></div><div><font face=3D"Courier" size=3D"1">=C2=A0 =C2=A0 =
=C2=A0 =C2=A0 FS_component(component_type=3D4, value=3Dbytearray([0x03, 0x5=
a, 0xc5, 0x6e]))</font></div><div><font face=3D"Courier" size=3D"1">=C2=A0 =
=C2=A0 ])</font></div><div><font face=3D"Courier" size=3D"1">=C2=A0 =C2=A0 =
print(flow_rule_cmp(fs1, fs2))</font></div><div><br></div><div>What happens=
 is (I refer to line numbers of the code in the github repo</div><div><a hr=
ef=3D"https://github.com/stoffi92/flowspec-cmp/blob/master/flow_cmp.py" tar=
get=3D"_blank">https://github.com/stoffi92/fl<wbr>owspec-cmp/blob/master/fl=
ow_cm<wbr>p.py</a>=C2=A0:</div></div><div><br></div><div>*) The IP componen=
ts are compared and as you mentioned: no decision can be made since the ip =
components are equal. (we reach line 74 for the equal ip components and con=
tinue with the next iteration)</div><div><br></div><div>*) The second compo=
nent _types_ are equal but not IP (we end up in the branch in line 80 since=
 the components are type=3D4 and not 1 or 2)</div><div><br></div><div>*) Th=
e length of the second components is compared and equal, so we continue in =
line 82</div><div><br></div><div>** See below: this is basically where the =
compare that you asked for happens **</div><div><br></div><div>*) Now we co=
me to the point where we compare the string of bytes one by one. As long as=
 they are equal. (this is basically what memcmp does - this is not very exp=
licit in the python code, since it is done by the &lt;, &gt; operators for =
the bytearray implicitly)</div><div><br></div><div>In your case what it doe=
s is, that it compares 0x01 to 0x03 and figures out that 0x01 is the lower =
value so it takes the branch in line 84 and returns with A_HAS_PRECEDENCE f=
rom line 85 (if both of your components would start with 0x01 it would cont=
inue to the second byte and so on).</div><div><br></div><div>Your first FS =
nlri has precedence because of the =E2=80=9Clower=E2=80=9D value.</div><spa=
n><div><br></div><div><blockquote type=3D"cite"><div class=3D"gmail_extra">=
<div class=3D"gmail_quote"><blockquote class=3D"gmail_quote" style=3D"margi=
n:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;border-le=
ft-color:rgb(204,204,204);padding-left:1ex"><div style=3D"word-wrap:break-w=
ord;line-break:after-white-space"><div><div><blockquote type=3D"cite"><div>=
<div><div class=3D"m_1852741153055948084m_-4395167006316299433h5"><div dir=
=3D"ltr"><div>01=C2=A0<b>18 58 58 58</b>=C2=A004=C2=A0<b>01 46 81 50=C2=A0 =
----&gt; Dst.Prefix:=C2=A0<a href=3D"http://88.88.88.0/24" target=3D"_blank=
">88.88.88.0/24</a>=C2=A0 Port: 70 | 80</b></div></div></div></div></div></=
blockquote></div></div></div></blockquote></div></div></blockquote><br></di=
v></span><div>Discamer: I assumed that you encoded the components themselfs=
 correctly (the 01 46 81 50 and 03 5a c5 6e)</div><div><br></div><div>Does =
this answer your question?</div><span class=3D"m_1852741153055948084HOEnZb"=
><font color=3D"#888888"><div><br></div><div>Christoph</div><div><br></div>=
</font></span><div><span><div>
<div style=3D"color:rgb(0,0,0);font-family:Helvetica;font-size:12px;font-st=
yle:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:norma=
l;text-align:start;text-indent:0px;text-transform:none;white-space:normal;w=
ord-spacing:0px">--=C2=A0<br>Christoph Loibl<br><a href=3D"mailto:c@tix.at"=
 target=3D"_blank">c@tix.at</a>=C2=A0| CL8-RIPE | PGP-Key-ID:=C2=A00x4B2C00=
55 |=C2=A0<a href=3D"http://www.nextlayer.at" target=3D"_blank">http://www.=
nextlayer.at</a></div><div style=3D"color:rgb(0,0,0);font-family:Helvetica;=
font-size:12px;font-style:normal;font-variant-caps:normal;font-weight:norma=
l;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:non=
e;white-space:normal;word-spacing:0px"><br></div><br class=3D"m_18527411530=
55948084m_-4395167006316299433Apple-interchange-newline">
</div>
</span><div><div class=3D"m_1852741153055948084h5"><div><br><blockquote typ=
e=3D"cite"><div>On 15.02.2018, at 05:08, PVLR Pavana Murthy &lt;<a href=3D"=
mailto:pvlrpm@gmail.com" target=3D"_blank">pvlrpm@gmail.com</a>&gt; wrote:<=
/div><br class=3D"m_1852741153055948084m_-4395167006316299433Apple-intercha=
nge-newline"><div><div dir=3D"ltr">Hi Christoph,<div>=C2=A0 Even in the=C2=
=A0

<span style=3D"color:rgb(34,34,34);font-family:arial,sans-serif;font-size:1=
2.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:nor=
mal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;=
text-transform:none;white-space:normal;word-spacing:0px;background-color:rg=
b(255,255,255);text-decoration-style:initial;text-decoration-color:initial;=
float:none;display:inline">RFC5575bis,=C2=A0</span>=C2=A0the following is g=
iven=C2=A0=C2=A0for comparing non-prefix type components.=C2=A0</div><div><=
br>

<pre class=3D"m_1852741153055948084m_-4395167006316299433gmail-newpage" sty=
le=3D"font-size:13.3333px;margin-top:0px;margin-bottom:0px;font-style:norma=
l;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;le=
tter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;wo=
rd-spacing:0px"> else:
               # assuming comp_a.value, comp_b.value of type bytearray
               if len(comp_a.value) =3D=3D len(comp_b.value):
                   if comp_a.value &gt; comp_b.value:
                       return B_HAS_PRECEDENCE
                   if comp_a.value &lt; comp_b.value:
                       return A_HAS_PRECEDENCE
                   # components equal -&gt; continue with next component
               else:
                   common =3D min(len(comp_a.value), len(comp_b.value))
                   if comp_a.value[:common] &gt; comp_b.value[:common]:
                       return B_HAS_PRECEDENCE
                   elif comp_a.value[:common] &lt; comp_b.value[:common]:
                       return A_HAS_PRECEDENCE
                   # the first common bytes match
                   elif len(comp_a.value) &gt; len(comp_b.value):
                       return A_HAS_PRECEDENCE
                   else:
                       return B_HAS_PRECEDENCE</pre><pre class=3D"m_1852741=
153055948084m_-4395167006316299433gmail-newpage" style=3D"font-size:13.3333=
px;margin-top:0px;margin-bottom:0px;font-style:normal;font-variant-ligature=
s:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;tex=
t-align:start;text-indent:0px;text-transform:none;word-spacing:0px"><br></p=
re><pre class=3D"m_1852741153055948084m_-4395167006316299433gmail-newpage" =
style=3D"font-size:13.3333px;margin-top:0px;margin-bottom:0px;font-style:no=
rmal;font-variant-ligatures:normal;font-variant-caps:normal;letter-spacing:=
normal;text-align:start;text-indent:0px;text-transform:none;word-spacing:0p=
x"><font face=3D"arial, helvetica, sans-serif"><b>What is  comp_a.value her=
e ? Is it the binary sting of [op, value]/[op,bitmask] or only value/bitmas=
k ?</b></font></pre><pre class=3D"m_1852741153055948084m_-43951670063162994=
33gmail-newpage" style=3D"font-size:13.3333px;margin-top:0px;margin-bottom:=
0px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:norma=
l;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:non=
e;word-spacing:0px"><font face=3D"arial, helvetica, sans-serif"><b><br></b>=
</font></pre><pre class=3D"m_1852741153055948084m_-4395167006316299433gmail=
-newpage" style=3D"font-size:13.3333px;margin-top:0px;margin-bottom:0px;fon=
t-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;lette=
r-spacing:normal;text-align:start;text-indent:0px;text-transform:none;word-=
spacing:0px"><font face=3D"arial, helvetica, sans-serif">Thanks,</font></pr=
e><pre class=3D"m_1852741153055948084m_-4395167006316299433gmail-newpage" s=
tyle=3D"font-size:13.3333px;margin-top:0px;margin-bottom:0px;font-style:nor=
mal;font-variant-ligatures:normal;font-variant-caps:normal;letter-spacing:n=
ormal;text-align:start;text-indent:0px;text-transform:none;word-spacing:0px=
"><font face=3D"arial, helvetica, sans-serif">Pavana.</font></pre>

</div></div><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">On Th=
u, Feb 15, 2018 at 3:11 AM, Christoph Loibl <span dir=3D"ltr">&lt;<a href=
=3D"mailto:c@tix.at" target=3D"_blank">c@tix.at</a>&gt;</span> wrote:<br><b=
lockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px =
#ccc solid;padding-left:1ex"><div style=3D"word-wrap:break-word;line-break:=
after-white-space">Hi Pavana,<div><br></div><div>Did you have a look into t=
he actual code (thanks to Job=E2=80=99s comment) that is contained in the R=
FC5575bis draft which should be identical from the behaviour:</div><div><br=
></div><div><a href=3D"https://tools.ietf.org/html/draft-ietf-idr-rfc5575bi=
s-06" target=3D"_blank">https://tools.ietf.org/html/dr<wbr>aft-ietf-idr-rfc=
5575bis-06</a></div><div><br></div><div>Christoph</div><div><br><div>
<div style=3D"font-family:Helvetica;font-size:12px;font-style:normal;font-v=
ariant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:star=
t;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px">=
--=C2=A0<br>Christoph Loibl<br><a href=3D"mailto:c@tix.at" target=3D"_blank=
">c@tix.at</a>=C2=A0| CL8-RIPE | PGP-Key-ID:=C2=A00x4B2C0055 |=C2=A0<a href=
=3D"http://www.nextlayer.at/" target=3D"_blank">http://www.nextlayer.at</a>=
</div><div style=3D"font-family:Helvetica;font-size:12px;font-style:normal;=
font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-alig=
n:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing=
:0px"><br></div><br class=3D"m_1852741153055948084m_-4395167006316299433m_-=
4693473135615231940Apple-interchange-newline">
</div>
<div><br><blockquote type=3D"cite"><div><div class=3D"m_1852741153055948084=
m_-4395167006316299433h5"><div>On 12.02.2018, at 12:03, PVLR Pavana Murthy =
&lt;<a href=3D"mailto:pvlrpm@gmail.com" target=3D"_blank">pvlrpm@gmail.com<=
/a>&gt; wrote:</div><br class=3D"m_1852741153055948084m_-439516700631629943=
3m_-4693473135615231940Apple-interchange-newline"></div></div><div><div><di=
v class=3D"m_1852741153055948084m_-4395167006316299433h5"><div dir=3D"ltr">=
Hello,<div>=C2=A0 In the RFC 5575, the following is given for the comparing=
 the Flowspec components of types other then prefix.</div><div><font face=
=3D"comic sans ms, sans-serif"><br></font></div><div><font face=3D"comic sa=
ns ms, sans-serif">} else {</font></div><div><font face=3D"comic sans ms, s=
ans-serif">common =3D</font></div><div><font face=3D"comic sans ms, sans-se=
rif">MIN(component_length(comp1), component_length(comp2));</font></div><di=
v><font face=3D"comic sans ms, sans-serif">cmp =3D memcmp(data(comp1), data=
(comp2), common);</font></div><div><font face=3D"comic sans ms, sans-serif"=
>// not equal, lowest value has precedence</font></div><div><font face=3D"c=
omic sans ms, sans-serif">// equal, longest string has precedence</font></d=
iv><div><font face=3D"comic sans ms, sans-serif">}=C2=A0</font></div><div><=
br></div><div><br></div><div>Here, what does <b>data</b> refrer to=C2=A0 ?<=
/div><div><br></div><div>Is it the binary form of 1) [op, value]&gt; / [op,=
 bitmask]=C2=A0 or 2) Just [value] / [bitmask]</div><div><br></div><div>eg:=
<br></div><div><br></div><div><br></div><div>1)=C2=A0 01 <b>18 58 58 58</b>=
 04 <b>01 46 81 50=C2=A0 ----&gt; Dst.Prefix: <a href=3D"http://88.88.88.0/=
24" target=3D"_blank">88.88.88.0/24</a>=C2=A0 Port: 70 | 80</b></div><div><=
b>=C2=A0</b></div><div>2)=C2=A0 01<b> 18 58 58 58 </b>04<b> 03 5a c5 6e=C2=
=A0 =C2=A0 ----&gt;=C2=A0=C2=A0

<b style=3D"color:rgb(34,34,34);font-family:arial,sans-serif;font-size:smal=
l;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;=
letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;=
white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-=
decoration-style:initial;text-decoration-color:initial">Dst.Prefix: <a href=
=3D"http://88.88.88.0/24" target=3D"_blank">88.88.88.0/24</a>=C2=A0 Port:</=
b>=C2=A0&gt;=3D90 &amp; &lt;=3D 110</b><br></div><div><b><br></b></div><div=
><b>In the above FS rules,=C2=A0 Dst. Prefix is same in both, so we need to=
 compare the data of next type 4 (Port).=C2=A0</b></div><div><b>So do we ne=
ed to do memcmp of=C2=A0=C2=A0(<b style=3D"color:rgb(34,34,34);font-family:=
arial,sans-serif;font-size:small;font-style:normal;font-variant-ligatures:n=
ormal;font-variant-caps:normal;letter-spacing:normal;text-align:start;text-=
indent:0px;text-transform:none;white-space:normal;word-spacing:0px;backgrou=
nd-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-col=
or:initial">01 46 81 50) and=C2=A0=C2=A0(<b style=3D"color:rgb(34,34,34);fo=
nt-family:arial,sans-serif;font-size:small;font-style:normal;font-variant-l=
igatures:normal;font-variant-caps:normal;letter-spacing:normal;text-align:s=
tart;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0p=
x;background-color:rgb(255,255,255);text-decoration-style:initial;text-deco=
ration-color:initial">03 5a c5 6e) ?</b></b></b></div><div><b><b style=3D"c=
olor:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;font-style:=
normal;font-variant-ligatures:normal;font-variant-caps:normal;letter-spacin=
g:normal;text-align:start;text-indent:0px;text-transform:none;white-space:n=
ormal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-st=
yle:initial;text-decoration-color:initial"><b style=3D"color:rgb(34,34,34);=
font-family:arial,sans-serif;font-size:small;font-style:normal;font-variant=
-ligatures:normal;font-variant-caps:normal;letter-spacing:normal;text-align=
:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:=
0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-de=
coration-color:initial"><br></b></b></b></div><div><span style=3D"color:rgb=
(34,34,34);font-family:arial,sans-serif;font-size:small;font-style:normal;f=
ont-variant-ligatures:normal;font-variant-caps:normal;letter-spacing:normal=
;text-align:start;text-indent:0px;text-transform:none;white-space:normal;wo=
rd-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:init=
ial;text-decoration-color:initial"><span style=3D"color:rgb(34,34,34);font-=
family:arial,sans-serif;font-size:small;font-style:normal;font-variant-liga=
tures:normal;font-variant-caps:normal;letter-spacing:normal;text-align:star=
t;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;b=
ackground-color:rgb(255,255,255);text-decoration-style:initial;text-decorat=
ion-color:initial">Thanks,</span></span></div><div><span style=3D"font-weig=
ht:bold;color:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;fo=
nt-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;lett=
er-spacing:normal;text-align:start;text-indent:0px;text-transform:none;whit=
e-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-deco=
ration-style:initial;text-decoration-color:initial"><span style=3D"color:rg=
b(34,34,34);font-family:arial,sans-serif;font-size:small;font-style:normal;=
font-variant-ligatures:normal;font-variant-caps:normal;letter-spacing:norma=
l;text-align:start;text-indent:0px;text-transform:none;white-space:normal;w=
ord-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:ini=
tial;text-decoration-color:initial;font-weight:normal">Pavana</span><b styl=
e=3D"font-weight:bold;color:rgb(34,34,34);font-family:arial,sans-serif;font=
-size:small;font-style:normal;font-variant-ligatures:normal;font-variant-ca=
ps:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-trans=
form:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,=
255);text-decoration-style:initial;text-decoration-color:initial">.</b></sp=
an></div><div><b><br></b></div><div><b><br></b></div><div><b><br></b></div>=
</div></div></div>
______________________________<wbr>_________________<br>Idr mailing list<br=
><a href=3D"mailto:Idr@ietf.org" target=3D"_blank">Idr@ietf.org</a><br><a h=
ref=3D"https://www.ietf.org/mailman/listinfo/idr" target=3D"_blank">https:/=
/www.ietf.org/mailman/l<wbr>istinfo/idr</a><br></div></blockquote></div><br=
></div></div></blockquote></div><br></div>
</div></blockquote></div><br></div></div></div></div></blockquote></div><br=
></div>
</div></div></blockquote></div><br></div></div>

--f403045f525e3196760565b35de4--


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From: "Acee Lindem (acee)" <acee@cisco.com>
To: Alvaro Retana <aretana.ietf@gmail.com>, "idr@ietf.org" <idr@ietf.org>
CC: "idr-chairs@ietf.org" <idr-chairs@ietf.org>, "draft-ietf-idr-bgp-prefix-sid@ietf.org" <draft-ietf-idr-bgp-prefix-sid@ietf.org>, Susan Hares <shares@ndzh.com>
Thread-Topic: Review Updates to draft-ietf-idr-bgp-prefix-sid
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From: "Susan Hares" <shares@ndzh.com>
To: "'idr wg'" <idr@ietf.org>
Cc: <idr-chairs@ietf.org>, "'Alvaro Retana'" <aretana.ietf@gmail.com>
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Subject: [Idr] WG LC for draft-ietf-idr-bgp-prefix-sid-17.txt (2/23 to 3/9/2018)
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This begins a 2 week IDR WG last call on changes to the BGP Prefix SID
draft. 

 

The changes are removal of the IPv6 SID TLV/SRv6 data plane and
error/conflict handling modifications to section 4. The reasons for removing
the IPv6 SID TLV were explained in
https://mailarchive.ietf.org/arch/msg/idr/3YE8hDCj0ky0NPFoLrTHV2AAEJ8. The
error/conflict handling changes were made based on fruitful  review comments
and discussions very late in the process. 

 

Just to refresh your memory, this draft has return from the IESG to the WG.
It is the intent of the WG chairs if IDR WG reaches consensus on this
version to immediately send it back the IESG for publication.

 

Susan Hares 

 

 

 


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<o:shapedefaults v:ext=3D"edit" spidmax=3D"1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext=3D"edit">
<o:idmap v:ext=3D"edit" data=3D"1" />
</o:shapelayout></xml><![endif]--></head><body lang=3DEN-US link=3Dblue =
vlink=3Dpurple><div class=3DWordSection1><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif"'>This =
begins a 2 week IDR WG last call on changes to the BGP Prefix SID draft. =
<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p>&nbsp;=
</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif"'>The =
changes are removal of the IPv6 SID TLV/SRv6 data plane and =
error/conflict handling modifications to section 4. The reasons for =
removing the IPv6 SID TLV were explained in <a =
href=3D"https://mailarchive.ietf.org/arch/msg/idr/3YE8hDCj0ky0NPFoLrTHV2A=
AEJ8">https://mailarchive.ietf.org/arch/msg/idr/3YE8hDCj0ky0NPFoLrTHV2AAE=
J8</a>. The error/conflict handling changes were made based on =
fruitful&nbsp; review comments and discussions very late in the process. =
<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p>&nbsp;=
</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Just to refresh your memory, this draft has return from the IESG to =
the WG. &nbsp;It is the intent of the WG chairs if IDR WG reaches =
consensus on this version to immediately send it back the IESG for =
publication.<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Susan Hares <o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p>&nbsp;=
</o:p></span></p></div></body></html>
------=_NextPart_000_000E_01D3ACD1.78EB8680--


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From: stefano previdi <stefano@previdi.net>
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Date: Sat, 24 Feb 2018 13:32:39 +0100
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To: Susan Hares <shares@ndzh.com>
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Subject: Re: [Idr] WG LC for draft-ietf-idr-bgp-prefix-sid-17.txt (2/23 to 3/9/2018)
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Sue, All,

I support the current version of the draft and I agree with the latest =
modifications.=20

Thanks.
s.


> On Feb 24, 2018, at 12:09 AM, Susan Hares <shares@ndzh.com> wrote:
>=20
> =20
> This begins a 2 week IDR WG last call on changes to the BGP Prefix SID =
draft.=20
> =20
> The changes are removal of the IPv6 SID TLV/SRv6 data plane and =
error/conflict handling modifications to section 4. The reasons for =
removing the IPv6 SID TLV were explained in =
https://mailarchive.ietf.org/arch/msg/idr/3YE8hDCj0ky0NPFoLrTHV2AAEJ8. =
The error/conflict handling changes were made based on fruitful  review =
comments and discussions very late in the process.=20
> =20
> Just to refresh your memory, this draft has return from the IESG to =
the WG.  It is the intent of the WG chairs if IDR WG reaches consensus =
on this version to immediately send it back the IESG for publication.
> =20
> Susan Hares=20
> =20
> =20
> =20
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr


From nobody Sun Feb 25 22:33:36 2018
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From: "Dongjie (Jimmy)" <jie.dong@huawei.com>
To: "idr@ietf.org" <idr@ietf.org>
Thread-Topic: Call for IETF101 IDR agenda items
Thread-Index: AdOuytBJhZ2HdV6pSPaPBWPCtnvGhA==
Date: Mon, 26 Feb 2018 06:33:23 +0000
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--_000_76CD132C3ADEF848BD84D028D243C927982F7B03NKGEML515MBXchi_
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Dear all,

The agenda of IETF 101 has been published. IDR will meet on Monday (March 1=
9th) from 15:50 to 17:20. Please send any IDR agenda items you might have t=
o me and CC the chairs. Please include the name of the person who will be p=
resenting, and the estimate time you'll need (including Q/A).

If you plan to make a presentation, please keep in mind the IDR tradition, =
"no Internet Draft - no time slot". You should also plan to send your slide=
s to me and CC the chairs no later than 24 hours prior to the IDR meeting, =
though earlier is better. If we don't have your slides by the deadline, you=
 may lose your slot. Please number your slides for the benefit of remote at=
tendees. By default your slides will be converted to PDF and presented from=
 the PDF. If you need to use any fancy builds or transitions, please make s=
ure to arrange this with us in advance. Thanks.

And potential presenters, please take a look at the checklist for presentin=
g at IDR:
https://trac.tools.ietf.org/wg/idr/trac/wiki/Checklist%20for%20presenting%2=
0at%20an%20IDR%20meeting

Best regards,
Jie

--_000_76CD132C3ADEF848BD84D028D243C927982F7B03NKGEML515MBXchi_
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<p class=3D"MsoNormal"><span lang=3D"EN-US">Dear all,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">The agenda of IETF 101 has been=
 published. IDR will meet on Monday (March 19th) from 15:50 to 17:20. Pleas=
e send any IDR agenda items you might have to me and CC the chairs. Please =
include the name of the person who will
 be presenting, and the estimate time you'll need (including Q/A).<o:p></o:=
p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">If you plan to make a presentat=
ion, please keep in mind the IDR tradition, &quot;no Internet Draft - no ti=
me slot&quot;. You should also plan to send your slides to me and CC the ch=
airs no later than 24 hours prior to the IDR meeting,
 though earlier is better. If we don't have your slides by the deadline, yo=
u may lose your slot. Please number your slides for the benefit of remote a=
ttendees. By default your slides will be converted to PDF and presented fro=
m the PDF. If you need to use any
 fancy builds or transitions, please make sure to arrange this with us in a=
dvance. Thanks.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">And potential presenters, pleas=
e take a look at the checklist for presenting at IDR:<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><a href=3D"https://trac.tools.i=
etf.org/wg/idr/trac/wiki/Checklist%20for%20presenting%20at%20an%20IDR%20mee=
ting">https://trac.tools.ietf.org/wg/idr/trac/wiki/Checklist%20for%20presen=
ting%20at%20an%20IDR%20meeting</a><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Best regards,<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Jie<o:p></o:p></span></p>
</div>
</body>
</html>

--_000_76CD132C3ADEF848BD84D028D243C927982F7B03NKGEML515MBXchi_--


From nobody Tue Feb 27 15:11:13 2018
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Subject: [Idr] idr - Requested session has been scheduled for IETF 101
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Dear Susan Hares,

The session(s) that you have requested have been scheduled.
Below is the scheduled session information followed by
the original request. 

idr Session 1 (2:00:00)
    Monday, Afternoon Session II 1550-1720
    Room Name: Buckingham size: 175
    ---------------------------------------------
    


Request Information:


---------------------------------------------------------
Working Group Name: Inter-Domain Routing
Area Name: Routing Area
Session Requester: Susan Hares

Number of Sessions: 1
Length of Session(s):  2 Hours
Number of Attendees: 70
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  Alvaro Retana

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Subject: [Idr] I-D Action: draft-ietf-idr-tunnel-encaps-09.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Inter-Domain Routing WG of the IETF.

        Title           : The BGP Tunnel Encapsulation Attribute
        Authors         : Eric C. Rosen
                          Keyur Patel
                          Gunter Van de Velde
	Filename        : draft-ietf-idr-tunnel-encaps-09.txt
	Pages           : 41
	Date            : 2018-02-28

Abstract:
   RFC 5512 defines a BGP Path Attribute known as the "Tunnel
   Encapsulation Attribute".  This attribute allows one to specify a set
   of tunnels.  For each such tunnel, the attribute can provide the
   information needed to create the tunnel and the corresponding
   encapsulation header.  The attribute can also provide information
   that aids in choosing whether a particular packet is to be sent
   through a particular tunnel.  RFC 5512 states that the attribute is
   only carried in BGP UPDATEs that have the "Encapsulation Subsequent
   Address Family (Encapsulation SAFI)".  This document deprecates the
   Encapsulation SAFI (which has never been used in production), and
   specifies semantics for the attribute when it is carried in UPDATEs
   of certain other SAFIs.  This document adds support for additional
   tunnel types, and allows a remote tunnel endpoint address to be
   specified for each tunnel.  This document also provides support for
   specifying fields of any inner or outer encapsulations that may be
   used by a particular tunnel.

   This document obsoletes RFC 5512.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-idr-tunnel-encaps/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-idr-tunnel-encaps-09
https://datatracker.ietf.org/doc/html/draft-ietf-idr-tunnel-encaps-09

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-idr-tunnel-encaps-09


Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/

