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From: Greg Mirsky <gregimirsky@gmail.com>
Date: Tue, 1 Sep 2020 06:43:39 -0700
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To: Tommy Pauly <tpauly=40apple.com@dmarc.ietf.org>
Cc: "IETF IPPM WG (ippm@ietf.org)" <ippm@ietf.org>
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Subject: Re: [ippm] WGLC for draft-ietf-ippm-capacity-metric-method
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Hi Tommy,
I support the publication of this document. It is well-written and, when
published, become an essential component of industry-wide work on defining
the IP Maximum Capacity metric and its measurement methodology.

Dear Authors,
thank you for this work. I have several questions and a number of editorial
suggestions that you might find useful. I greatly appreciate your
consideration of the comments below:

   - Is this document intended to update an RFC? The first page suggests
   that you have thought about that but have not yet pointed to the RFC to be
   updated. If you decide that the new document does update the existing RFC,
   you may note that also in the Abstract.
   - The document uses a significant number of acronyms that probably are
   not well-known at IETF, e.g., RTD, RTL, etc. I think that adding a
   sub-section Acronyms will be helpful to a reader.
   - A number of references don't work as links, e.g., "[ refs to ITU-T
   SG12, ETSI STQ, BBF liaisons ]". Also, several sections are references by
   title, e.g., "[see section Related Round-Trip Delay and Loss Definitions
   below]", and that makes finding the right place more challenging.
   - In Section 4 a source IP address of a host accompanied with a note
   "such as the globally routable IP address". Should the note be
   interpreted as an example or as a normative statement?
   - Section 4 defines dt as "dt, the duration of N equal sub-intervals in
   I (default 1 sec)". But further in the document, on two occasions, it is
   noted that "all sub-intervals SHOULD be of equal duration". If dt MAY be of
   varying duration, then the definition in Section 4 might be changed to "dt,
   the duration of N sub-intervals in I (default 1 sec)". On the other hand,
   if that definition is interpreted as normative, then s/SHOULD/MUST/2.
   - It is not obvious whether "Note that the UDP transport layer is one
   requirement specified below." applies to the test protocol or something
   else.
   - Also, in Section 4, the last sentence notes that

   Note that time stamps, sequnce numbers, etc. will be established by

   the test protocol.

Perhaps that may be put as a requirement for the test protocol.


   - Security Consideration section references RFC 4656 OWAMP and RFC 5357
   TWAMP. Do you think that adding references to RFC 8672 STAMP and
   draft-ietf-ippm-stamp-option-tlv, as STAMP and its extensions, might be
   used as the protocol to measure the IP Capacity, is helpful?
   - I think that the requirement to provide control of the number of
   concurrent test sessions can be stronger, as the rate-limiting requirement,
   than a recommendation. The requirement is more applicable to the test
   protocol that MUST provide control over the number of simultaneous test
   sessions.

Several nits:

   - s/[copycat
   <https://tools.ietf.org/html/draft-ietf-ippm-capacity-metric-method-03#ref-copycat>
   ][copycat]/[copycat]/
   -  s/sequnce/sequence/
   - A reference in "Type-P is a parallel concept to "population of
   interest" defined in ITU-T Rec. Y.1540." will be helpful.
   - I assume that in "T, the host time of the *first* test packet's
   *arrival* as measured at MP(Dst)", MP stands for Measurement Point. Is that
   correct?
   - Capitalization in "Target performance threshold" throughout the
   document needs consistency, on several occasions, it is used as "target
   performance threshold".

Regards,
Greg


On Fri, Aug 14, 2020 at 2:21 PM Tommy Pauly <tpauly=
40apple.com@dmarc.ietf.org> wrote:

> Hello IPPM,
>
> As discussed at IETF 108, draft-ietf-ippm-capacity-metric-method is
> stable, and the group felt it is ready for Working Group Last Call.
>
> The latest version can be found here:
> https://tools.ietf.org/html/draft-ietf-ippm-capacity-metric-method-02
>
> The last call will end on *Wednesday, September 2*. Please reply to
> ippm@ietf.org with your reviews and comments, and indicate if you think
> the document is ready to progress!
>
> Best,
> Tommy & Ian
> _______________________________________________
> ippm mailing list
> ippm@ietf.org
> https://www.ietf.org/mailman/listinfo/ippm
>

--000000000000a8052505ae40b5c0
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Hi Tommy,<div>I support the publication of this document. =
It is well-written and, when published, become an essential component of in=
dustry-wide work on defining the IP Maximum Capacity metric and its measure=
ment methodology.</div><div><br></div><div>Dear Authors,</div><div>thank yo=
u for this work. I have several questions and a number of editorial suggest=
ions that you might find useful. I greatly appreciate your consideration of=
 the comments below:</div><div><ul><li>Is this document intended to update =
an RFC? The first page suggests that you have thought about that but have n=
ot yet pointed to the RFC to be updated. If you decide that the new documen=
t does update the existing RFC, you may note that also in the Abstract.</li=
><li>The document uses a significant number=C2=A0of acronyms that probably =
are not well-known at IETF, e.g., RTD, RTL, etc. I think that adding a sub-=
section Acronyms will be helpful to a reader.</li><li>A number of reference=
s don&#39;t work as links, e.g., &quot;[ refs to ITU-T SG12, ETSI STQ, BBF =
liaisons ]&quot;. Also, several sections are references by title, e.g., &qu=
ot;[see section Related Round-Trip Delay and Loss Definitions below]&quot;,=
=C2=A0and that makes finding the right place more challenging.</li><li>In S=
ection 4 a source IP address of a host accompanied with a note &quot;such a=
s the globally routable IP address&quot;. Should the note be interpreted=C2=
=A0as an example or as a normative statement?</li><li>Section 4 defines dt =
as &quot;dt, the duration of N equal sub-intervals in I (default 1 sec)&quo=
t;. But further in the document, on two occasions, it is noted that &quot;a=
ll sub-intervals SHOULD be of equal duration&quot;. If dt MAY be of varying=
 duration, then the definition in Section 4 might be changed to &quot;dt, t=
he duration of N sub-intervals in I (default 1 sec)&quot;. On the other han=
d, if that definition is interpreted=C2=A0as normative, then s/SHOULD/MUST/=
2.</li><li>It is not obvious whether &quot;Note that the UDP transport laye=
r is one requirement specified below.&quot; applies to the test protocol or=
 something else.</li><li>Also, in Section 4, the last sentence notes that</=
li></ul></div><blockquote style=3D"margin:0 0 0 40px;border:none;padding:0p=
x"><div>=C2=A0 =C2=A0Note that time stamps, sequnce numbers, etc. will be e=
stablished by</div></blockquote><blockquote style=3D"margin:0 0 0 40px;bord=
er:none;padding:0px"><div>=C2=A0 =C2=A0the test protocol.</div></blockquote=
><blockquote style=3D"margin:0 0 0 40px;border:none;padding:0px"><div>Perha=
ps that may be put as a requirement for the test protocol.</div></blockquot=
e><ul><li>Security Consideration section references RFC 4656 OWAMP and RFC =
5357 TWAMP. Do you think that adding references to RFC 8672 STAMP and draft=
-ietf-ippm-stamp-option-tlv, as STAMP and its extensions, might be used as =
the protocol to measure the IP Capacity, is helpful?</li><li>I think that t=
he requirement to provide control of the number of concurrent test sessions=
 can be stronger, as the rate-limiting requirement, than a recommendation. =
The requirement is more applicable to the test protocol that MUST provide c=
ontrol over the number of simultaneous test sessions.=C2=A0</li></ul><div>S=
everal nits:</div><div><ul><li>s/<span style=3D"color:rgb(14,16,26);backgro=
und:transparent;margin-top:0pt;margin-bottom:0pt">[</span><a style=3D"backg=
round:transparent;margin-top:0pt;margin-bottom:0pt;color:rgb(74,110,224)" t=
arget=3D"_blank" href=3D"https://tools.ietf.org/html/draft-ietf-ippm-capaci=
ty-metric-method-03#ref-copycat" class=3D"gmail-_e75a791d-denali-editor-pag=
e-rtfLink"><span style=3D"background:transparent;margin-top:0pt;margin-bott=
om:0pt">copycat</span></a><span style=3D"color:rgb(14,16,26);background:tra=
nsparent;margin-top:0pt;margin-bottom:0pt">][copycat]/[copycat]/</span></li=
><li>=C2=A0s/sequnce/sequence/</li><li>A reference in &quot;Type-P is a par=
allel concept to &quot;population of interest&quot; defined in ITU-T Rec. Y=
.1540.&quot; will be helpful.<br></li><li>I assume that in &quot;T, the hos=
t time of the *first* test packet&#39;s *arrival* as=C2=A0measured at MP(Ds=
t)&quot;, MP stands for Measurement Point. Is that correct?</li><li>Capital=
ization=C2=A0in &quot;Target performance threshold&quot; throughout the doc=
ument needs consistency, on several occasions, it is used as &quot;target p=
erformance threshold&quot;.</li></ul><div>Regards,</div><div>Greg</div><div=
><br></div></div><div><br></div><div class=3D"gmail_quote"><div dir=3D"ltr"=
 class=3D"gmail_attr">On Fri, Aug 14, 2020 at 2:21 PM Tommy Pauly &lt;tpaul=
y=3D<a href=3D"mailto:40apple.com@dmarc.ietf.org" target=3D"_blank">40apple=
.com@dmarc.ietf.org</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quot=
e" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204)=
;padding-left:1ex"><div>Hello IPPM,<div><br></div><div>As discussed at IETF=
 108, draft-ietf-ippm-capacity-metric-method is stable, and the group felt =
it is ready for Working Group Last Call.</div><div><br></div><div>The lates=
t version can be found here:=C2=A0<a href=3D"https://tools.ietf.org/html/dr=
aft-ietf-ippm-capacity-metric-method-02" target=3D"_blank">https://tools.ie=
tf.org/html/draft-ietf-ippm-capacity-metric-method-02</a></div><div><br></d=
iv><div>The last call will end on <b>Wednesday, September 2</b>. Please rep=
ly to <a href=3D"mailto:ippm@ietf.org" target=3D"_blank">ippm@ietf.org</a>=
=C2=A0with your reviews and comments, and indicate if you think the documen=
t is ready to progress!</div><div><br></div><div>Best,</div><div>Tommy &amp=
; Ian</div></div>_______________________________________________<br>
ippm mailing list<br>
<a href=3D"mailto:ippm@ietf.org" target=3D"_blank">ippm@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/ippm" rel=3D"noreferrer" t=
arget=3D"_blank">https://www.ietf.org/mailman/listinfo/ippm</a><br>
</blockquote></div></div>

--000000000000a8052505ae40b5c0--


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From: Greg Mirsky <gregimirsky@gmail.com>
Date: Tue, 1 Sep 2020 12:25:02 -0700
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To: Benjamin Kaduk <kaduk@mit.edu>
Cc: The IESG <iesg@ietf.org>, draft-ietf-ippm-stamp-option-tlv@ietf.org,  IPPM Chairs <ippm-chairs@ietf.org>, IETF IPPM WG <ippm@ietf.org>,  Martin Duke <martin.h.duke@gmail.com>
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Subject: Re: [ippm] Benjamin Kaduk's Discuss on draft-ietf-ippm-stamp-option-tlv-07: (with DISCUSS and COMMENT)
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Hi Ben,
I hope you're well.
All the changes we've discussed have been included in the new version of
the draft
<https://datatracker.ietf.org/doc/draft-ietf-ippm-stamp-option-tlv/>. Could
you please let me know whether all your DISCUSSes have been satisfactory
addressed?

Best regards,
Greg

On Wed, Aug 19, 2020 at 11:49 AM Greg Mirsky <gregimirsky@gmail.com> wrote:

> Hi Ben,
> I hope this note finds you well.
> I much appreciate the suggestions you've kindly shared in the course of
> our discussion. All the updates have been applied and the new version
> <https://datatracker.ietf.org/doc/draft-ietf-ippm-stamp-option-tlv/> of
> the document has been published. Could you please review the changes and
> let me know whether your DISCUSSes have been addressed?
>
> Regards,
> Greg
>
> On Wed, Jul 22, 2020 at 3:24 PM Greg Mirsky <gregimirsky@gmail.com> wrote:
>
>> Hi Ben,
>> thank you for the clarifications and suggested text that improves the
>> document. Please find my answers and notes below tagged GIM2>>.
>> Attached is the new working version and its diff to -07 (including the
>> new Location TLV section).
>>
>> Regards,
>> Greg
>>
>> PS. I've clipped the COMMENTS as these now have the discussion thread
>> of their own.
>>
>> On Thu, Jul 16, 2020 at 7:48 PM Benjamin Kaduk <kaduk@mit.edu> wrote:
>> >
>> > Hi Greg,
>> >
>> > On Thu, Jul 16, 2020 at 05:38:08PM -0700, Greg Mirsky wrote:
>> > > Hi Benjamin,
>> > > thank you for your thorough review and insightful comments (and
>> DISCUSSes,
>> > > of course).
>> > > I hope it will be okay if I start with addressing DISCUSSes and split
>> > > comments resolution into a separate thread(s).
>> >
>> > Of course!
>> >
>> > > Hence, I've added my answers and notes in-line under tag GIM>>.
>> > >
>> > > Regards,
>> > > Greg
>> > >
>> > > On Tue, Jul 14, 2020 at 7:30 PM Benjamin Kaduk via Datatracker <
>> > > noreply@ietf.org> wrote:
>> > >
>> > > > Benjamin Kaduk has entered the following ballot position for
>> > > > draft-ietf-ippm-stamp-option-tlv-07: 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
>> this
>> > > > 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-ippm-stamp-option-tlv/
>> > > >
>> > > >
>> > > >
>> > > >
>> ----------------------------------------------------------------------
>> > > > DISCUSS:
>> > > >
>> ----------------------------------------------------------------------
>> > > >
>> > > > I support Roman's discusses and am happy to see the ongoing
>> discussion
>> > > > thereof.
>> > > >
>> > > > (1) I think there's a conflict between this document and RFC 8762
>> with
>> > > > respect to the behavior of pure RFC 8762 implementations that
>> receive
>> > > > packets longer than the base packet for the given operational mode.
>> > > >
>> > > > RFC 8762 says (Section 4.3):
>> > > >
>> > > > % The Session-Reflector receives the STAMP-Test packet and verifies
>> it. If
>> > > > % the base STAMP-Test packet is validated, the Session-Reflector
>> that
>> > > > % supports this specification prepares and transmits the reflected
>> test
>> > > > % packet symmetric to the packet received from the Session-Sender
>> copying
>> > > > % the content beyond the size of the base STAMP packet (see Section
>> 4.2).
>> > > >
>> > > > But Section 4 of this document says:
>> > > >
>> > > >                                                    A
>> Session-Reflector
>> > > >    that does not support STAMP extensions is not expected to
>> compare the
>> > > >    value in the Length field of the UDP header and the length of the
>> > > >    STAMP base packet.  Hence the Session-Reflector will transmit the
>> > > >    base STAMP packet.  [...]
>> > > >
>> > > > Does "will transmit the base STAMP packet" mean something other than
>> > > > "with the exact length of the base packet [for the given operational
>> > > > mode]"?
>> > > >
>> > > GIM>> Thank you for pointing out the text in RFC 8672. I agree that
>> text in
>> > > the draft requires re-work. Would the following update make it
>> consistent
>> > > with RFC 8762 (I will accept your suggestion to change the use of the
>> U
>> > > flag so that the Session-Sender sets it to 1 on the transmission.
>> Thus if
>> > > the Session-Sender receives a TLV flag set to 1 in the reflected
>> packet it
>> > > MUST skip the TLV):
>> > > OLD TEXT:
>> > >    A Session-Reflector
>> > >    that does not support STAMP extensions is not expected to compare
>> the
>> > >    value in the Length field of the UDP header and the length of the
>> > >    STAMP base packet.  Hence the Session-Reflector will transmit the
>> > >    base STAMP packet.  It is the local policy on the Session-Sender
>> > >    (similar to the handling of SSID == 0 scenario described in
>> > >    Section 3) that will control the sender's behavior.
>> > > NEW TEXT:
>> > >    A Session-Reflector
>> > >    that does not support STAMP extensions will not process but copy
>> them
>> > >    into the reflected packet, as defined in Section 4.3 [RFC8762].
>> The
>> > >    Session-Sender receives unprocessed TLV indicated by the U flag
>> being
>> > >    set to 1.
>> >
>> > This should make us consistent with RFC 8762, yes.  I think it might be
>> > worth reminding the reader that the Session-Sender will know if it is
>> > talking to a Session-Reflector that does not support STAMP extensions,
>> > because such Session-Reflectors will send a zeroed SSID, though I guess
>> > that behavior is already mentioned a couple sentences later, so maybe it
>> > would be redundant here.
>> >
>> > I'd suggest rewording the last sentence (of the new text) to someething
>> > like "a Session-Sender that supports TLVs will indicate specific TLVs
>> that
>> > it did not process by setting the U flag to 1 in those TLVs", to help
>> > reinforce that the U flag will only be set by a Session-Reflector that
>> > supports extensions/this document at all.
>>
>> GIM2>> Thank you for the suggested text Accepted and it reads as:
>> NEW TEXT:
>>    A Session-Reflector
>>    that does not support STAMP extensions will not process but copy them
>>    into the reflected packet, as defined in Section 4.3 [RFC8762].  A
>>    Session-Reflector that supports TLVs will indicate specific TLVs
>>    that it did not process by setting the U flag to 1 in those TLVs.
>> >
>> > > >
>> > > > (2) As I remarked on (then-) draft-ietf-ippm-stamp, I think we need
>> to
>> > > > require some level of cryptographic protection whenever control
>> > > > information is included in a Session-Sender's test packet.  That is,
>> > > > that a Session-Reflector MUST NOT act on control information
>> received in
>> > > > unauthenticated packets, and specifically, that the HMAC TLV must be
>> > > > used, since the base authenticated STAMP packet's HMAC does not
>> cover
>> > > > the options.
>> > > >
>> > > GIM>> The use of the HMAC TLV is required in the authenticated mode
>> STAMP:
>> > >    The keyed Hashed
>> > >    Message Authentication Code (HMAC) TLV MUST be included in a STAMP
>> > >    test packet in the authenticated mode, excluding the case where the
>> > >    only TLV present is the Extra Padding TLV.
>> > > We can require that in unauthenticated STAMP mode some TLVs be
>> accompanied
>> > > by the HMAC TLV. Would mitigate the exposure of the Session-Reflector?
>> > > Which TLVs, in your opinion, require such a requirement?
>> GIM2>> I have some reservations to say that a particular TLV MUST be
>> accompanied by the HMAC TLV. If a domain secured, an operator may use
>> a TLV, e.g., CoS TLV, without authentication. I think that the current
>> text:
>>    The HMAC TLV MAY be used to protect the integrity of STAMP extensions
>>    in STAMP unauthenticated mode.
>> can be expanded to require that an implementation can enable
>> authentication of extensions via the management plane. It might be as:
>> NEW TEXT:
>>    The HMAC TLV MAY be used to protect the integrity of STAMP extensions
>>    in STAMP unauthenticated mode.  An implementation of STAMP extensions
>>    MUST provide controls to enable the integrity protection of STAMP
>>    extensions in STAMP unauthenticated mode.
>> Would the updated text be acceptable?
>>
>>
>> >
>> > I think the idea was to require the HMAC TLV to accompany those TLVs
>> that
>> > represent "control information", yes.  My initial read of the document
>> > (reflected in my longer comments) says that the Location and Timestamp
>> > Information TLVs would be considered to contain such "control
>> information",
>> > though on reread perhaps the Timestamp Information is not always
>> considered
>> > sensitive.  I'm on the fence about Location, and I think that Class of
>> > Service is pretty clearly on the "control information" side of things
>> > (since it affects the headers of the containing IP packet and
>> consequently
>> > the behavior of the network).
>>
>> GIM2>> I agree that CoS is very close to what we consider "control
>> information" as it includes information that affects how the reflected
>> test packet is transmitted. But as in RFC 8762 itself, HMAC TLV is
>> defined as optional in STAMP unauthenticated mode and, as I think of
>> it, that leaves the choice to an operator whether to protect the
>> integrity of the CoS TLV or not. Do you think that such arrangement is
>> acceptable?
>>
>> >
>> > > >
>> > > > (3) The secdir reviewer's question about dealing with 6-to-4
>> gateways
>> > > > seems to have not gotten a response.  Specifically, the requirement
>> that
>> > > > "[t]he Session-Reflector MUST validate the Length value against the
>> > > > address family of the transport encapsulating the STAMP test packet"
>> > > > seems to require the protocol to fail when sender and reflector use
>> > > > different address families, or perhaps to require the sender to use
>> > > > trial and error to determine which address family is used by the
>> > > > reflector.  Some clarification on the intended operation in such
>> > > > scenarios seems appropriate.
>> > > >
>> > > GIM>> I've misunderstood the question and thank you for clarifying the
>> > > scenario. I now see that IP addresses in the Location TLV must allow
>> > > explicit signaling of the address family while providing space for
>> IPv6.
>> > > So, we introduce sub-TLVs and a new sub-registry for IANA. Does that
>> sound
>> > > reasonable? I'll work on details if you agree with the proposed
>> approach.
>> >
>> > That sounds like it would work.
>> >
>> > > >
>> > > > (4) The ability for a Session-Sender to (MUST-level!) control the
>> DSCP
>> > > > codepoint used by packets generated by a Session-Reflector feels
>> like it
>> > > > opens up significant risk in site-local (security-relevant)
>> policy.  That
>> > > > is, the interpretation of the DSCP codepoints is to large extent
>> > > > site-specific, and allowing a nominally external system to set
>> any/all
>> > > > possible values, without a chance for site policy to be applied and
>> > > > block the use of potentially disruptive DSCP values.  So I think we
>> need
>> > > > to modify the "MUST set", perhaps requiring that either the
>> requested
>> > > > DSCP value is used or the entire TLV/packet/whatever is rejected.
>> > > >
>> > > GIM>> Perhaps we can add a note in the security section that an
>> > > implementation must control the support of each TLV. In other words, a
>> > > particular TLV can be disabled for the given test session.
>> Alternatively,
>> > > the CoS TLV might require the use of the HMAC TLV. I think that the
>> first
>> > > option is sufficient. What do you think? Or would you suggest an
>> entirely
>> > > different approach?
>> >
>> > I think my previous replies here combine to say that use of the CoS TLV
>> > should require ues of the HMAC TLV, but I think it's also good to let an
>> > implementation control the support for each TLV as you propose.  My
>> > intuition is still saying that a separate local policy filter should be
>> > available, though -- just because the peer is authenticated does not
>> > inherently grant them privilege to set arbitrary DSCP values.  In some
>> > sense this is the classic distinction between authentication and
>> > authorization.  In some networks, setting some DSCP values might require
>> > more privilege than setting other such values, and the simple
>> > "authenticated or not" knob provided by the HMAC TLV doesn't allow us to
>> > express that distinction.  (I'm thinking about scenarios where setting a
>> > particular DSCP value privileges the enclosed packet to such a degree
>> that
>> > other traffic on the network suffers significantly as a result -- a
>> "drop
>> > everything and move this packet!" bit, if you will.)
>> GIM2>> Yes, I agree that the CoS TLV might become another loaded gun
>> ith which an operator shoots himself/herself in the foot. Well, one
>> more in a large arsenal we've provided them over the years. I envision
>> that the CoS TLV might be very useful during the service activation
>> testing and then exercising that "drop everything and move this
>> packet!" marking seems reasonable. On the other hand, using the same
>> marking as part of in-service testing requires analysis and
>> consideration. Do you think that additional text to explain the
>> possible impact of CoS TLV on the production network is needed?
>> >
>> > > >
>> > > > (5) If we're not going to remedy the severability of authenticated
>> > > > options from authenticated base packets (which would be my preferred
>> > > > resolution), we need to document that weakness in the security
>> > > > considerations.
>> > > >
>> > > GIM>> I think that the document does require HMAC TLV is used in the
>> > > authenticated mode.  Please see my comments to DISCUSS #2. Would you
>> agree?
>> >
>> > I think my point didn't make it through properly, sorry.
>> >
>> > The issue is not that we need to authenticate both the "base part" and
>> the
>> > "extensions part", but rather that we need a way to say that "base part
>> of
>> > packet 1" and "extensions part of packet 1" go together.  Right now,
>> with
>> > two separate HMACs, the Session-Reflector would happily process a packet
>> > that has "base part of packet 1" and "extensions part of packet 2" and
>> not
>> > even notice that anything was wrong.  (A similar thing could be done to
>> > responses processed at the Session-Sender, of course.)  That is, I can
>> > freely "mix and match" authenticated base parts and authenticated
>> > extensions parts (as an on-path attacker).  Including as input to one of
>> > the HMAC calls a unique value from the other part of the packet will be
>> > enough to tie the two together, and let the recipient detect the
>> > modification.  The most promising candidates for such a "unique
>> per-packet
>> > value" would be the HMAC output itself and the packet sequence number.
>> > Using the HMAC value itself is a more robust cryptographic construction
>> (in
>> > that it authenticates the entire other part by reference), but I suspect
>> > that we'll have to use the sequence number due to implementation
>> > (performance) concerns -- needing to wait for the first HMAC before
>> > extensions can be finalized seems like it would introduce unwanted
>> delay in
>> > the timestamping.  Assuming that implementations actually check the
>> > sequence number for repeats, that should still provide enough
>> protection.
>> >
>> > Thanks,
>> >
>> > Ben
>> >
>> > > >
>> > > >
>>
>

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<div dir=3D"ltr"><div dir=3D"ltr">Hi Ben,<div>I hope you&#39;re well.</div>=
<div>All the changes we&#39;ve discussed have been included in<a href=3D"ht=
tps://datatracker.ietf.org/doc/draft-ietf-ippm-stamp-option-tlv/"> the new =
version of the draft</a>. Could you please let me know whether all your DIS=
CUSSes have been satisfactory addressed?</div><div><br></div><div>Best rega=
rds,</div><div>Greg</div></div><br><div class=3D"gmail_quote"><div dir=3D"l=
tr" class=3D"gmail_attr">On Wed, Aug 19, 2020 at 11:49 AM Greg Mirsky &lt;<=
a href=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt; wrote=
:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.=
8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir=3D"lt=
r">Hi Ben,<div>I hope this note finds you well.</div><div>I much appreciate=
 the suggestions you&#39;ve kindly shared in the course of our discussion. =
All the updates have been applied and<a href=3D"https://datatracker.ietf.or=
g/doc/draft-ietf-ippm-stamp-option-tlv/" target=3D"_blank"> the new version=
</a> of the document has been published. Could you please review the change=
s and let me know whether your DISCUSSes have been addressed?</div><div><br=
></div><div>Regards,</div><div>Greg</div></div><br><div class=3D"gmail_quot=
e"><div dir=3D"ltr" class=3D"gmail_attr">On Wed, Jul 22, 2020 at 3:24 PM Gr=
eg Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gr=
egimirsky@gmail.com</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quot=
e" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204)=
;padding-left:1ex">Hi Ben,<br>
thank you for the clarifications and suggested text that improves the<br>
document. Please find my answers and notes below tagged GIM2&gt;&gt;.<br>
Attached is the new working version and its diff to -07 (including the<br>
new Location TLV section).<br>
<br>
Regards,<br>
Greg<br>
<br>
PS. I&#39;ve clipped the COMMENTS as these now have the discussion thread<b=
r>
of their own.<br>
<br>
On Thu, Jul 16, 2020 at 7:48 PM Benjamin Kaduk &lt;<a href=3D"mailto:kaduk@=
mit.edu" target=3D"_blank">kaduk@mit.edu</a>&gt; wrote:<br>
&gt;<br>
&gt; Hi Greg,<br>
&gt;<br>
&gt; On Thu, Jul 16, 2020 at 05:38:08PM -0700, Greg Mirsky wrote:<br>
&gt; &gt; Hi Benjamin,<br>
&gt; &gt; thank you for your thorough review and insightful comments (and D=
ISCUSSes,<br>
&gt; &gt; of course).<br>
&gt; &gt; I hope it will be okay if I start with addressing DISCUSSes and s=
plit<br>
&gt; &gt; comments resolution into a separate thread(s).<br>
&gt;<br>
&gt; Of course!<br>
&gt;<br>
&gt; &gt; Hence, I&#39;ve added my answers and notes in-line under tag GIM&=
gt;&gt;.<br>
&gt; &gt;<br>
&gt; &gt; Regards,<br>
&gt; &gt; Greg<br>
&gt; &gt;<br>
&gt; &gt; On Tue, Jul 14, 2020 at 7:30 PM Benjamin Kaduk via Datatracker &l=
t;<br>
&gt; &gt; <a href=3D"mailto:noreply@ietf.org" target=3D"_blank">noreply@iet=
f.org</a>&gt; wrote:<br>
&gt; &gt;<br>
&gt; &gt; &gt; Benjamin Kaduk has entered the following ballot position for=
<br>
&gt; &gt; &gt; draft-ietf-ippm-stamp-option-tlv-07: Discuss<br>
&gt; &gt; &gt;<br>
&gt; &gt; &gt; When responding, please keep the subject line intact and rep=
ly to all<br>
&gt; &gt; &gt; email addresses included in the To and CC lines. (Feel free =
to cut this<br>
&gt; &gt; &gt; introductory paragraph, however.)<br>
&gt; &gt; &gt;<br>
&gt; &gt; &gt;<br>
&gt; &gt; &gt; Please refer to <a href=3D"https://www.ietf.org/iesg/stateme=
nt/discuss-criteria.html" rel=3D"noreferrer" target=3D"_blank">https://www.=
ietf.org/iesg/statement/discuss-criteria.html</a><br>
&gt; &gt; &gt; for more information about IESG DISCUSS and COMMENT position=
s.<br>
&gt; &gt; &gt;<br>
&gt; &gt; &gt;<br>
&gt; &gt; &gt; The document, along with other ballot positions, can be foun=
d here:<br>
&gt; &gt; &gt; <a href=3D"https://datatracker.ietf.org/doc/draft-ietf-ippm-=
stamp-option-tlv/" rel=3D"noreferrer" target=3D"_blank">https://datatracker=
.ietf.org/doc/draft-ietf-ippm-stamp-option-tlv/</a><br>
&gt; &gt; &gt;<br>
&gt; &gt; &gt;<br>
&gt; &gt; &gt;<br>
&gt; &gt; &gt; ------------------------------------------------------------=
----------<br>
&gt; &gt; &gt; DISCUSS:<br>
&gt; &gt; &gt; ------------------------------------------------------------=
----------<br>
&gt; &gt; &gt;<br>
&gt; &gt; &gt; I support Roman&#39;s discusses and am happy to see the ongo=
ing discussion<br>
&gt; &gt; &gt; thereof.<br>
&gt; &gt; &gt;<br>
&gt; &gt; &gt; (1) I think there&#39;s a conflict between this document and=
 RFC 8762 with<br>
&gt; &gt; &gt; respect to the behavior of pure RFC 8762 implementations tha=
t receive<br>
&gt; &gt; &gt; packets longer than the base packet for the given operationa=
l mode.<br>
&gt; &gt; &gt;<br>
&gt; &gt; &gt; RFC 8762 says (Section 4.3):<br>
&gt; &gt; &gt;<br>
&gt; &gt; &gt; % The Session-Reflector receives the STAMP-Test packet and v=
erifies it. If<br>
&gt; &gt; &gt; % the base STAMP-Test packet is validated, the Session-Refle=
ctor that<br>
&gt; &gt; &gt; % supports this specification prepares and transmits the ref=
lected test<br>
&gt; &gt; &gt; % packet symmetric to the packet received from the Session-S=
ender copying<br>
&gt; &gt; &gt; % the content beyond the size of the base STAMP packet (see =
Section 4.2).<br>
&gt; &gt; &gt;<br>
&gt; &gt; &gt; But Section 4 of this document says:<br>
&gt; &gt; &gt;<br>
&gt; &gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 A Session-Reflector<br>
&gt; &gt; &gt;=C2=A0 =C2=A0 that does not support STAMP extensions is not e=
xpected to compare the<br>
&gt; &gt; &gt;=C2=A0 =C2=A0 value in the Length field of the UDP header and=
 the length of the<br>
&gt; &gt; &gt;=C2=A0 =C2=A0 STAMP base packet.=C2=A0 Hence the Session-Refl=
ector will transmit the<br>
&gt; &gt; &gt;=C2=A0 =C2=A0 base STAMP packet.=C2=A0 [...]<br>
&gt; &gt; &gt;<br>
&gt; &gt; &gt; Does &quot;will transmit the base STAMP packet&quot; mean so=
mething other than<br>
&gt; &gt; &gt; &quot;with the exact length of the base packet [for the give=
n operational<br>
&gt; &gt; &gt; mode]&quot;?<br>
&gt; &gt; &gt;<br>
&gt; &gt; GIM&gt;&gt; Thank you for pointing out the text in RFC 8672. I ag=
ree that text in<br>
&gt; &gt; the draft requires re-work. Would the following update make it co=
nsistent<br>
&gt; &gt; with RFC 8762 (I will accept your suggestion to change the use of=
 the U<br>
&gt; &gt; flag so that the Session-Sender sets it to 1 on the transmission.=
 Thus if<br>
&gt; &gt; the Session-Sender receives a TLV flag set to 1 in the reflected =
packet it<br>
&gt; &gt; MUST skip the TLV):<br>
&gt; &gt; OLD TEXT:<br>
&gt; &gt;=C2=A0 =C2=A0 A Session-Reflector<br>
&gt; &gt;=C2=A0 =C2=A0 that does not support STAMP extensions is not expect=
ed to compare the<br>
&gt; &gt;=C2=A0 =C2=A0 value in the Length field of the UDP header and the =
length of the<br>
&gt; &gt;=C2=A0 =C2=A0 STAMP base packet.=C2=A0 Hence the Session-Reflector=
 will transmit the<br>
&gt; &gt;=C2=A0 =C2=A0 base STAMP packet.=C2=A0 It is the local policy on t=
he Session-Sender<br>
&gt; &gt;=C2=A0 =C2=A0 (similar to the handling of SSID =3D=3D 0 scenario d=
escribed in<br>
&gt; &gt;=C2=A0 =C2=A0 Section 3) that will control the sender&#39;s behavi=
or.<br>
&gt; &gt; NEW TEXT:<br>
&gt; &gt;=C2=A0 =C2=A0 A Session-Reflector<br>
&gt; &gt;=C2=A0 =C2=A0 that does not support STAMP extensions will not proc=
ess but copy them<br>
&gt; &gt;=C2=A0 =C2=A0 into the reflected packet, as defined in Section 4.3=
 [RFC8762].=C2=A0 The<br>
&gt; &gt;=C2=A0 =C2=A0 Session-Sender receives unprocessed TLV indicated by=
 the U flag being<br>
&gt; &gt;=C2=A0 =C2=A0 set to 1.<br>
&gt;<br>
&gt; This should make us consistent with RFC 8762, yes.=C2=A0 I think it mi=
ght be<br>
&gt; worth reminding the reader that the Session-Sender will know if it is<=
br>
&gt; talking to a Session-Reflector that does not support STAMP extensions,=
<br>
&gt; because such Session-Reflectors will send a zeroed SSID, though I gues=
s<br>
&gt; that behavior is already mentioned a couple sentences later, so maybe =
it<br>
&gt; would be redundant here.<br>
&gt;<br>
&gt; I&#39;d suggest rewording the last sentence (of the new text) to somee=
thing<br>
&gt; like &quot;a Session-Sender that supports TLVs will indicate specific =
TLVs that<br>
&gt; it did not process by setting the U flag to 1 in those TLVs&quot;, to =
help<br>
&gt; reinforce that the U flag will only be set by a Session-Reflector that=
<br>
&gt; supports extensions/this document at all.<br>
<br>
GIM2&gt;&gt; Thank you for the suggested text Accepted and it reads as:<br>
NEW TEXT:<br>
=C2=A0 =C2=A0A Session-Reflector<br>
=C2=A0 =C2=A0that does not support STAMP extensions will not process but co=
py them<br>
=C2=A0 =C2=A0into the reflected packet, as defined in Section 4.3 [RFC8762]=
.=C2=A0 A<br>
=C2=A0 =C2=A0Session-Reflector that supports TLVs will indicate specific TL=
Vs<br>
=C2=A0 =C2=A0that it did not process by setting the U flag to 1 in those TL=
Vs.<br>
&gt;<br>
&gt; &gt; &gt;<br>
&gt; &gt; &gt; (2) As I remarked on (then-) draft-ietf-ippm-stamp, I think =
we need to<br>
&gt; &gt; &gt; require some level of cryptographic protection whenever cont=
rol<br>
&gt; &gt; &gt; information is included in a Session-Sender&#39;s test packe=
t.=C2=A0 That is,<br>
&gt; &gt; &gt; that a Session-Reflector MUST NOT act on control information=
 received in<br>
&gt; &gt; &gt; unauthenticated packets, and specifically, that the HMAC TLV=
 must be<br>
&gt; &gt; &gt; used, since the base authenticated STAMP packet&#39;s HMAC d=
oes not cover<br>
&gt; &gt; &gt; the options.<br>
&gt; &gt; &gt;<br>
&gt; &gt; GIM&gt;&gt; The use of the HMAC TLV is required in the authentica=
ted mode STAMP:<br>
&gt; &gt;=C2=A0 =C2=A0 The keyed Hashed<br>
&gt; &gt;=C2=A0 =C2=A0 Message Authentication Code (HMAC) TLV MUST be inclu=
ded in a STAMP<br>
&gt; &gt;=C2=A0 =C2=A0 test packet in the authenticated mode, excluding the=
 case where the<br>
&gt; &gt;=C2=A0 =C2=A0 only TLV present is the Extra Padding TLV.<br>
&gt; &gt; We can require that in unauthenticated STAMP mode some TLVs be ac=
companied<br>
&gt; &gt; by the HMAC TLV. Would mitigate the exposure of the Session-Refle=
ctor?<br>
&gt; &gt; Which TLVs, in your opinion, require such a requirement?<br>
GIM2&gt;&gt; I have some reservations to say that a particular TLV MUST be<=
br>
accompanied by the HMAC TLV. If a domain secured, an operator may use<br>
a TLV, e.g., CoS TLV, without authentication. I think that the current<br>
text:<br>
=C2=A0 =C2=A0The HMAC TLV MAY be used to protect the integrity of STAMP ext=
ensions<br>
=C2=A0 =C2=A0in STAMP unauthenticated mode.<br>
can be expanded to require that an implementation can enable<br>
authentication of extensions via the management plane. It might be as:<br>
NEW TEXT:<br>
=C2=A0 =C2=A0The HMAC TLV MAY be used to protect the integrity of STAMP ext=
ensions<br>
=C2=A0 =C2=A0in STAMP unauthenticated mode.=C2=A0 An implementation of STAM=
P extensions<br>
=C2=A0 =C2=A0MUST provide controls to enable the integrity protection of ST=
AMP<br>
=C2=A0 =C2=A0extensions in STAMP unauthenticated mode.<br>
Would the updated text be acceptable?<br>
<br>
<br>
&gt;<br>
&gt; I think the idea was to require the HMAC TLV to accompany those TLVs t=
hat<br>
&gt; represent &quot;control information&quot;, yes.=C2=A0 My initial read =
of the document<br>
&gt; (reflected in my longer comments) says that the Location and Timestamp=
<br>
&gt; Information TLVs would be considered to contain such &quot;control inf=
ormation&quot;,<br>
&gt; though on reread perhaps the Timestamp Information is not always consi=
dered<br>
&gt; sensitive.=C2=A0 I&#39;m on the fence about Location, and I think that=
 Class of<br>
&gt; Service is pretty clearly on the &quot;control information&quot; side =
of things<br>
&gt; (since it affects the headers of the containing IP packet and conseque=
ntly<br>
&gt; the behavior of the network).<br>
<br>
GIM2&gt;&gt; I agree that CoS is very close to what we consider &quot;contr=
ol<br>
information&quot; as it includes information that affects how the reflected=
<br>
test packet is transmitted. But as in RFC 8762 itself, HMAC TLV is<br>
defined as optional in STAMP unauthenticated mode and, as I think of<br>
it, that leaves the choice to an operator whether to protect the<br>
integrity of the CoS TLV or not. Do you think that such arrangement is<br>
acceptable?<br>
<br>
&gt;<br>
&gt; &gt; &gt;<br>
&gt; &gt; &gt; (3) The secdir reviewer&#39;s question about dealing with 6-=
to-4 gateways<br>
&gt; &gt; &gt; seems to have not gotten a response.=C2=A0 Specifically, the=
 requirement that<br>
&gt; &gt; &gt; &quot;[t]he Session-Reflector MUST validate the Length value=
 against the<br>
&gt; &gt; &gt; address family of the transport encapsulating the STAMP test=
 packet&quot;<br>
&gt; &gt; &gt; seems to require the protocol to fail when sender and reflec=
tor use<br>
&gt; &gt; &gt; different address families, or perhaps to require the sender=
 to use<br>
&gt; &gt; &gt; trial and error to determine which address family is used by=
 the<br>
&gt; &gt; &gt; reflector.=C2=A0 Some clarification on the intended operatio=
n in such<br>
&gt; &gt; &gt; scenarios seems appropriate.<br>
&gt; &gt; &gt;<br>
&gt; &gt; GIM&gt;&gt; I&#39;ve misunderstood the question and thank you for=
 clarifying the<br>
&gt; &gt; scenario. I now see that IP addresses in the Location TLV must al=
low<br>
&gt; &gt; explicit signaling of the address family while providing space fo=
r IPv6.<br>
&gt; &gt; So, we introduce sub-TLVs and a new sub-registry for IANA. Does t=
hat sound<br>
&gt; &gt; reasonable? I&#39;ll work on details if you agree with the propos=
ed approach.<br>
&gt;<br>
&gt; That sounds like it would work.<br>
&gt;<br>
&gt; &gt; &gt;<br>
&gt; &gt; &gt; (4) The ability for a Session-Sender to (MUST-level!) contro=
l the DSCP<br>
&gt; &gt; &gt; codepoint used by packets generated by a Session-Reflector f=
eels like it<br>
&gt; &gt; &gt; opens up significant risk in site-local (security-relevant) =
policy.=C2=A0 That<br>
&gt; &gt; &gt; is, the interpretation of the DSCP codepoints is to large ex=
tent<br>
&gt; &gt; &gt; site-specific, and allowing a nominally external system to s=
et any/all<br>
&gt; &gt; &gt; possible values, without a chance for site policy to be appl=
ied and<br>
&gt; &gt; &gt; block the use of potentially disruptive DSCP values.=C2=A0 S=
o I think we need<br>
&gt; &gt; &gt; to modify the &quot;MUST set&quot;, perhaps requiring that e=
ither the requested<br>
&gt; &gt; &gt; DSCP value is used or the entire TLV/packet/whatever is reje=
cted.<br>
&gt; &gt; &gt;<br>
&gt; &gt; GIM&gt;&gt; Perhaps we can add a note in the security section tha=
t an<br>
&gt; &gt; implementation must control the support of each TLV. In other wor=
ds, a<br>
&gt; &gt; particular TLV can be disabled for the given test session. Altern=
atively,<br>
&gt; &gt; the CoS TLV might require the use of the HMAC TLV. I think that t=
he first<br>
&gt; &gt; option is sufficient. What do you think? Or would you suggest an =
entirely<br>
&gt; &gt; different approach?<br>
&gt;<br>
&gt; I think my previous replies here combine to say that use of the CoS TL=
V<br>
&gt; should require ues of the HMAC TLV, but I think it&#39;s also good to =
let an<br>
&gt; implementation control the support for each TLV as you propose.=C2=A0 =
My<br>
&gt; intuition is still saying that a separate local policy filter should b=
e<br>
&gt; available, though -- just because the peer is authenticated does not<b=
r>
&gt; inherently grant them privilege to set arbitrary DSCP values.=C2=A0 In=
 some<br>
&gt; sense this is the classic distinction between authentication and<br>
&gt; authorization.=C2=A0 In some networks, setting some DSCP values might =
require<br>
&gt; more privilege than setting other such values, and the simple<br>
&gt; &quot;authenticated or not&quot; knob provided by the HMAC TLV doesn&#=
39;t allow us to<br>
&gt; express that distinction.=C2=A0 (I&#39;m thinking about scenarios wher=
e setting a<br>
&gt; particular DSCP value privileges the enclosed packet to such a degree =
that<br>
&gt; other traffic on the network suffers significantly as a result -- a &q=
uot;drop<br>
&gt; everything and move this packet!&quot; bit, if you will.)<br>
GIM2&gt;&gt; Yes, I agree that the CoS TLV might become another loaded gun<=
br>
ith which an operator shoots himself/herself in the foot. Well, one<br>
more in a large arsenal we&#39;ve provided them over the years. I envision<=
br>
that the CoS TLV might be very useful during the service activation<br>
testing and then exercising that &quot;drop everything and move this<br>
packet!&quot; marking seems reasonable. On the other hand, using the same<b=
r>
marking as part of in-service testing requires analysis and<br>
consideration. Do you think that additional text to explain the<br>
possible impact of CoS TLV on the production network is needed?<br>
&gt;<br>
&gt; &gt; &gt;<br>
&gt; &gt; &gt; (5) If we&#39;re not going to remedy the severability of aut=
henticated<br>
&gt; &gt; &gt; options from authenticated base packets (which would be my p=
referred<br>
&gt; &gt; &gt; resolution), we need to document that weakness in the securi=
ty<br>
&gt; &gt; &gt; considerations.<br>
&gt; &gt; &gt;<br>
&gt; &gt; GIM&gt;&gt; I think that the document does require HMAC TLV is us=
ed in the<br>
&gt; &gt; authenticated mode.=C2=A0 Please see my comments to DISCUSS #2. W=
ould you agree?<br>
&gt;<br>
&gt; I think my point didn&#39;t make it through properly, sorry.<br>
&gt;<br>
&gt; The issue is not that we need to authenticate both the &quot;base part=
&quot; and the<br>
&gt; &quot;extensions part&quot;, but rather that we need a way to say that=
 &quot;base part of<br>
&gt; packet 1&quot; and &quot;extensions part of packet 1&quot; go together=
.=C2=A0 Right now, with<br>
&gt; two separate HMACs, the Session-Reflector would happily process a pack=
et<br>
&gt; that has &quot;base part of packet 1&quot; and &quot;extensions part o=
f packet 2&quot; and not<br>
&gt; even notice that anything was wrong.=C2=A0 (A similar thing could be d=
one to<br>
&gt; responses processed at the Session-Sender, of course.)=C2=A0 That is, =
I can<br>
&gt; freely &quot;mix and match&quot; authenticated base parts and authenti=
cated<br>
&gt; extensions parts (as an on-path attacker).=C2=A0 Including as input to=
 one of<br>
&gt; the HMAC calls a unique value from the other part of the packet will b=
e<br>
&gt; enough to tie the two together, and let the recipient detect the<br>
&gt; modification.=C2=A0 The most promising candidates for such a &quot;uni=
que per-packet<br>
&gt; value&quot; would be the HMAC output itself and the packet sequence nu=
mber.<br>
&gt; Using the HMAC value itself is a more robust cryptographic constructio=
n (in<br>
&gt; that it authenticates the entire other part by reference), but I suspe=
ct<br>
&gt; that we&#39;ll have to use the sequence number due to implementation<b=
r>
&gt; (performance) concerns -- needing to wait for the first HMAC before<br=
>
&gt; extensions can be finalized seems like it would introduce unwanted del=
ay in<br>
&gt; the timestamping.=C2=A0 Assuming that implementations actually check t=
he<br>
&gt; sequence number for repeats, that should still provide enough protecti=
on.<br>
&gt;<br>
&gt; Thanks,<br>
&gt;<br>
&gt; Ben<br>
&gt;<br>
&gt; &gt; &gt;<br>
&gt; &gt; &gt;<br>
</blockquote></div>
</blockquote></div></div>

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From: Greg Mirsky <gregimirsky@gmail.com>
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Hi Yali,
thank you for your comments and the question about the U flag's initial
setting. I think that there is a benefit in a Session-Sender setting the U
flag to 1. If the STAMP Session-Reflector does not support
draft-ietf-ippm-stamp-option-tlv, it will copy TLVs that follow the base
STAMP packet. The Session-Sender then can detect that none of the TLVs were
processed. What do you think?

Regards,
Greg

On Mon, Aug 31, 2020 at 6:52 PM wangyali <wangyali11@huawei.com> wrote:

> Hi Greg,
>
>
>
> Thanks a lot for your feedbacks and follow-up notes. Please find my
> thoughts on the U flag inline [Yali2].
>
>
>
> Best regards,
>
> Yali
>
>
>
> *From:* Greg Mirsky [mailto:gregimirsky@gmail.com]
> *Sent:* Saturday, August 29, 2020 3:10 AM
> *To:* wangyali <wangyali11@huawei.com>
> *Cc:* draft-ietf-ippm-stamp-option-tlv@ietf.org; IETF IPPM WG (
> ippm@ietf.org) <ippm@ietf.org>
> *Subject:* Re: [ippm] Fwd: New Version Notification for
> draft-ietf-ippm-stamp-option-tlv-09.txt
>
>
>
> Hi Yali,
>
> thank you for sharing your thoughts on how IANA allocation policies can b=
e
> used for STAMP TLV and sub-TLV registries. Please find my follow-up notes
> in-lined tagged GIM2>>.
>
>
>
> Regards,
>
> Greg
>
>
>
> On Thu, Aug 27, 2020 at 8:15 PM wangyali <wangyali11@huawei.com> wrote:
>
> Hi Greg,
>
>
>
> Thanks for your reply. Please see inline [Yali].
>
>
>
> Best regards,
>
> Yali
>
>
>
> *From:* Greg Mirsky [mailto:gregimirsky@gmail.com]
> *Sent:* Thursday, August 27, 2020 5:46 AM
> *To:* wangyali <wangyali11@huawei.com>
> *Cc:* draft-ietf-ippm-stamp-option-tlv@ietf.org; IETF IPPM WG (
> ippm@ietf.org) <ippm@ietf.org>
> *Subject:* Re: [ippm] Fwd: New Version Notification for
> draft-ietf-ippm-stamp-option-tlv-09.txt
>
>
>
> Hi Yali,
>
> thank you for your questions. Please find my answers and notes below unde=
r
> GIM>> tag.
>
>
>
> Regards,
>
> Greg
>
>
>
> On Mon, Aug 24, 2020 at 7:51 PM wangyali <wangyali11@huawei.com> wrote:
>
> Hi Greg and all,
>
>
>
> May I have some questions and comments about the STAMP TLV Type Registry?
>
>
>
> First, as shown in the Table 1, code points in the range 252-254 is
> allocated for Private Use. Does it mean each Vendor/Enterprise can just
> define three kinds of STAMP TLV? What=E2=80=99s your consideration about =
the three
> code points allocation for Vendor Private Use ?
>
> GIM>> My understanding of Section 4.1 RFC 8126
> <https://tools.ietf.org/html/rfc8126#section-4.1> is that Private code
> points MUST NOT be used ouside of an isolated local network domain, e.g.,
> lab network.
>
>  [Yali] True. This is the definition of the Private Use. So why is the
> range of Private Use just 3 code points? In addition, in the
> draft-ietf-mpls-lsp-ping-registries-update, the term "Vendor Private Use"
> is changed to "First Come First Served (FCFS)" in the principles of the L=
SP
> Ping TLV and sub-TLV registries. I suggest merging the range of Private U=
se
> into the FCFS. What do you think?
>
> GIM2>> In my understanding of RFC 8126, Private Use and FCFS are quite
> different. The former is only for isolated networks, while the latter may
> be used over the Internet. Also, I find that using FCFS registration we
> expose STAMP to the following warning provided in Section 4.4:
>
>    A working group or any other entity that is developing a protocol
>    based on a First Come First Served code point has to be extremely
>    careful that the protocol retains wire compatibility with current use
>    of the code point.  Once that is no longer true, the new work needs
>    to change to a different code point (and register that use at the
>    appropriate time).
>
> Hence, unless there's a strong technical reason for the proposed change o=
f
> the registration, I'm hesitant to make the update at this time.
>
>
>
> Second, if the TLV Type or sub-TLV Type is Experimental, similarly to
> Private Use, does it need to fill the vendor=E2=80=99s SMI Private Enterp=
rise Code
> in the first four octets of Value field? Please give some clarifications
> any expected restrictions on experimental scope. Such as said in [RFC8126=
],
> whether it=E2=80=99s acceptable to run experiments using those code point=
s over the
> open Internet or whether such experiments should be confined to more clos=
ed
> environments.
>
> GIM>> True, the Experimental code points are similar to the ones
> designeted to Private Use, as explained in Section 4.2. I've followed the
> discussion on MPLS WG list
> <https://mailarchive.ietf.org/arch/browse/mpls/?gbt=3D1&index=3DewEzqMkkw=
wOxdChj_NfF_G_CZKo>that
> dealt with the issues related to allocation of TLV and sub-TLV code point=
s.
> I couldn't find the issue of the experimental scope being reflected in th=
e
> latest version of the draft
> <https://datatracker.ietf.org/doc/draft-ietf-mpls-lsp-ping-registries-upd=
ate/?include_text=3D1>.
> Persnally, I don't think that we need to restrict the scope of using the
> experimental type. What do you think?
>
>  [Yali] Fine. If we want to follow the draft
> <https://datatracker.ietf.org/doc/draft-ietf-mpls-lsp-ping-registries-upd=
ate/?include_text=3D1>,
> I suggest merging the range of Private Use into the FCFS and revising the
> following sentence in section 4.
>
> Old:  If a Type value for TLV or sub-
>
>    TLV is in the range for Vendor Private Use, the Length MUST be at
>
>    least 4, and the first four octets MUST be that vendor's Structure of
>
>    Management Information (SMI) Private Enterprise Code, as recorded in
>
>    IANA's SMI Private Enterprise Codes sub-registry, in network octet ord=
er.
>
> New: If a Type value for TLV or sub-TLV is in the range for Experimental
> Use, the Length MUST be at least 4, and the first four octets MUST be tha=
t
> vendor's Structure of Management Information (SMI) Private Enterprise Cod=
e,
> as recorded in IANA's SMI Private Enterprise Codes sub-registry, in netwo=
rk
> octet order. In the standards compliant implementations, if the
> unrecognized TLV or sun-TLV is from the Experimental Use range, the TLVs
> should be silently ignored.
>
> GIM2>> Thank you for proposing the new text. I think that "silently
> ignored" for a TLV from the Experimental range is very different
> from how the handling of the unrecognized TLV defined in the specificatio=
n.
> To support symmetrical packets in STAMP, the Session-Reflector must someh=
ow
> compensate the length of the unrecognized TLV. Should it replace the
> unrecognized Experimental TLV with the Extra Padding TLV? Or copy the
> unrecognized Experimental TLV into the reflected packet as-is, i.e.,
> without setting the U flag? What do you think?
>
>
>
> [Yali2] first, I find there may be an editorial error that =E2=80=9Cthe U=
 flag
> MUST be set to 1 in an extended STAMP test packet which is transmitted by=
 a
> Session-Sender=E2=80=9D. Should it be that =E2=80=9Cthe U flag MUST be se=
t to 0 in an
> extended STAMP test packet which is transmitted by a Session-Sender=E2=80=
=9D? And
> if the unrecognized TLV is not understood by the session-reflector, I
> suggest to copy the unrecognized TLV into the reflected packet as-is, and
> set the U flag to 1.
>
> Best regards,
>
> Yali
>
>
>
>
>
> ---------- Forwarded message ---------
>
> From: <internet-drafts@ietf.org> <&lt;internet-drafts@ietf.org&gt;>
>
> Date: Fri, Aug 21, 2020 at 1:01 PM
>
> Subject: New Version Notification for
>
> draft-ietf-ippm-stamp-option-tlv-09.txt
>
> To: Richard Foote <footer.foote@nokia.com> <&lt;footer.foote@nokia.com&gt=
;>om>, Greg Mirsky <
>
> gregimirsky@gmail.com> <gregimirsky@gmail.com&gt;>gt;, Henrik Nydell <hny=
dell@accedian.com> <&lt;hnydell@accedian.com&gt;>om>, Adi Masputra <
>
> adi@apple.com> <adi@apple.com&gt;>gt;, Ernesto Ruffini <eruffini@outsys.o=
rg> <&lt;eruffini@outsys.org&gt;>rg>, Xiao Min <
>
> xiao.min2@zte.com.cn> <xiao.min2@zte.com.cn&gt;>
>
>
>
>
>
>
>
> A new version of I-D, draft-ietf-ippm-stamp-option-tlv-09.txt
>
> has been successfully submitted by Greg Mirsky and posted to the
>
> IETF repository.
>
>
>
> Name:           draft-ietf-ippm-stamp-option-tlv
>
> Revision:       09
>
> Title:          Simple Two-way Active Measurement Protocol Optional
>
> Extensions
>
> Document date:  2020-08-21
>
> Group:          ippm
>
> Pages:          32
>
> URL:
>
> https://www.ietf.org/internet-drafts/draft-ietf-ippm-stamp-option-tlv-09.=
txt
>
> Status:
>
> https://datatracker.ietf.org/doc/draft-ietf-ippm-stamp-option-tlv/
>
> Htmlized:
>
> https://tools.ietf.org/html/draft-ietf-ippm-stamp-option-tlv-09
>
> Htmlized:
>
> https://datatracker.ietf.org/doc/html/draft-ietf-ippm-stamp-option-tlv
>
> Diff:
>
> https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-ippm-stamp-option-tlv-09
>
>
>
> Abstract:
>
>    This document describes optional extensions to Simple Two-way Active
>
>    Measurement Protocol (STAMP) that enable measurement of performance
>
>    metrics.  The document also defines a STAMP Test Session Identifier
>
>    and thus updates RFC 8762.
>
>
>
>

--00000000000057dd2a05ae45da9d
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Hi Yali,<div>thank you for your comments and the question =
about the U flag&#39;s initial setting. I think that there is a benefit=C2=
=A0in a Session-Sender setting the U flag to 1. If the STAMP Session-Reflec=
tor does not support draft-ietf-ippm-stamp-option-tlv, it will copy TLVs th=
at follow the base STAMP packet. The Session-Sender then can detect that no=
ne of the TLVs were processed. What do you think?</div><div><br></div><div>=
Regards,</div><div>Greg</div></div><br><div class=3D"gmail_quote"><div dir=
=3D"ltr" class=3D"gmail_attr">On Mon, Aug 31, 2020 at 6:52 PM wangyali &lt;=
<a href=3D"mailto:wangyali11@huawei.com">wangyali11@huawei.com</a>&gt; wrot=
e:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0=
.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">





<div lang=3D"EN-US">
<div class=3D"gmail-m_2600757043719534867WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">Hi Greg,<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">Thanks a lot for your feedbacks and follow-u=
p notes. Please find my thoughts on the U flag inline [Yali2].<u></u><u></u=
></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">Best regards,<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">Yali<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><b><span style=3D"font-size:11pt;font-family:Calibri=
,sans-serif">From:</span></b><span style=3D"font-size:11pt;font-family:Cali=
bri,sans-serif"> Greg Mirsky [mailto:<a href=3D"mailto:gregimirsky@gmail.co=
m" target=3D"_blank">gregimirsky@gmail.com</a>]
<br>
<b>Sent:</b> Saturday, August 29, 2020 3:10 AM<br>
<b>To:</b> wangyali &lt;<a href=3D"mailto:wangyali11@huawei.com" target=3D"=
_blank">wangyali11@huawei.com</a>&gt;<br>
<b>Cc:</b> <a href=3D"mailto:draft-ietf-ippm-stamp-option-tlv@ietf.org" tar=
get=3D"_blank">draft-ietf-ippm-stamp-option-tlv@ietf.org</a>; IETF IPPM WG =
(<a href=3D"mailto:ippm@ietf.org" target=3D"_blank">ippm@ietf.org</a>) &lt;=
<a href=3D"mailto:ippm@ietf.org" target=3D"_blank">ippm@ietf.org</a>&gt;<br=
>
<b>Subject:</b> Re: [ippm] Fwd: New Version Notification for draft-ietf-ipp=
m-stamp-option-tlv-09.txt<u></u><u></u></span></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<div>
<p class=3D"MsoNormal">Hi Yali,<u></u><u></u></p>
<div>
<p class=3D"MsoNormal">thank you for sharing your thoughts on how IANA allo=
cation policies can be used for STAMP TLV and sub-TLV registries. Please fi=
nd my follow-up notes in-lined tagged GIM2&gt;&gt;.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Regards,<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Greg<u></u><u></u></p>
</div>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<div>
<p class=3D"MsoNormal">On Thu, Aug 27, 2020 at 8:15 PM wangyali &lt;<a href=
=3D"mailto:wangyali11@huawei.com" target=3D"_blank">wangyali11@huawei.com</=
a>&gt; wrote:<u></u><u></u></p>
</div>
<blockquote style=3D"border-top:none;border-right:none;border-bottom:none;b=
order-left:1pt solid rgb(204,204,204);padding:0cm 0cm 0cm 6pt;margin:5pt 0c=
m 5pt 4.8pt">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">Hi Greg,</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">Thanks for your reply. Please see inline [Ya=
li].</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">Best regards,</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">Yali</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><b><span style=3D"font-size:11pt;font-family:Calibri=
,sans-serif">From:</span></b><span style=3D"font-size:11pt;font-family:Cali=
bri,sans-serif"> Greg Mirsky [mailto:</span><a href=3D"mailto:gregimirsky@g=
mail.com" target=3D"_blank"><span style=3D"font-size:11pt;font-family:Calib=
ri,sans-serif">gregimirsky@gmail.com</span></a><span style=3D"font-size:11p=
t;font-family:Calibri,sans-serif">]
<br>
<b>Sent:</b> Thursday, August 27, 2020 5:46 AM<br>
<b>To:</b> wangyali &lt;</span><a href=3D"mailto:wangyali11@huawei.com" tar=
get=3D"_blank"><span style=3D"font-size:11pt;font-family:Calibri,sans-serif=
">wangyali11@huawei.com</span></a><span style=3D"font-size:11pt;font-family=
:Calibri,sans-serif">&gt;<br>
<b>Cc:</b> </span><a href=3D"mailto:draft-ietf-ippm-stamp-option-tlv@ietf.o=
rg" target=3D"_blank"><span style=3D"font-size:11pt;font-family:Calibri,san=
s-serif">draft-ietf-ippm-stamp-option-tlv@ietf.org</span></a><span style=3D=
"font-size:11pt;font-family:Calibri,sans-serif">;
 IETF IPPM WG (</span><a href=3D"mailto:ippm@ietf.org" target=3D"_blank"><s=
pan style=3D"font-size:11pt;font-family:Calibri,sans-serif">ippm@ietf.org</=
span></a><span style=3D"font-size:11pt;font-family:Calibri,sans-serif">) &l=
t;</span><a href=3D"mailto:ippm@ietf.org" target=3D"_blank"><span style=3D"=
font-size:11pt;font-family:Calibri,sans-serif">ippm@ietf.org</span></a><spa=
n style=3D"font-size:11pt;font-family:Calibri,sans-serif">&gt;<br>
<b>Subject:</b> Re: [ippm] Fwd: New Version Notification for draft-ietf-ipp=
m-stamp-option-tlv-09.txt</span><u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<div>
<div>
<p class=3D"MsoNormal">Hi Yali,<u></u><u></u></p>
<div>
<p class=3D"MsoNormal">thank you for your questions. Please find my answers=
 and notes below under GIM&gt;&gt; tag.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Regards,<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Greg<u></u><u></u></p>
</div>
</div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<div>
<div>
<p class=3D"MsoNormal">On Mon, Aug 24, 2020 at 7:51 PM wangyali &lt;<a href=
=3D"mailto:wangyali11@huawei.com" target=3D"_blank">wangyali11@huawei.com</=
a>&gt; wrote:<u></u><u></u></p>
</div>
<blockquote style=3D"border-top:none;border-right:none;border-bottom:none;b=
order-left:1pt solid rgb(204,204,204);padding:0cm 0cm 0cm 6pt;margin:5pt 0c=
m 5pt 4.8pt">
<div>
<div>
<p class=3D"MsoNormal">Hi Greg and all,<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">May I have some questions and comments about the STA=
MP TLV Type Registry?<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">First, as shown in the Table 1, code points in the r=
ange 252-254 is allocated for Private Use. Does it mean each Vendor/Enterpr=
ise can just define three kinds of STAMP TLV? What=E2=80=99s
 your consideration about the three code points allocation for Vendor Priva=
te Use ?<u></u><u></u></p>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal">GIM&gt;&gt; My understanding of
<a href=3D"https://tools.ietf.org/html/rfc8126#section-4.1" target=3D"_blan=
k">Section 4.1 RFC 8126</a> is that Private code points MUST NOT be used ou=
side of an isolated local network domain, e.g., lab network.=C2=A0<u></u><u=
></u></p>
</div>
<blockquote style=3D"border-top:none;border-right:none;border-bottom:none;b=
order-left:1pt solid rgb(204,204,204);padding:0cm 0cm 0cm 6pt;margin:5pt 0c=
m 5pt 4.8pt">
<div>
<div>
<p class=3D"MsoNormal">=C2=A0<span style=3D"color:rgb(31,73,125)">[Yali] Tr=
ue. This is the definition of the Private Use. So why is the range of Priva=
te Use just 3 code points? In addition, in the draft-ietf-mpls-lsp-ping-reg=
istries-update,
 the term &quot;Vendor Private Use&quot; is changed to &quot;First Come Fir=
st Served (FCFS)&quot; in the principles of the LSP Ping TLV and sub-TLV re=
gistries. I suggest merging the range of Private Use into the FCFS. What do=
 you think?</span><u></u><u></u></p>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal">GIM2&gt;&gt; In my understanding of RFC 8126, Privat=
e Use and FCFS are quite different. The former is only for isolated network=
s, while the latter may be used over the Internet. Also, I find that using =
FCFS registration we expose STAMP to the
 following warning provided in Section 4.4:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0 =C2=A0A working group or any other entity tha=
t is developing a protocol<br>
=C2=A0 =C2=A0based on a First Come First Served code point has to be extrem=
ely<br>
=C2=A0 =C2=A0careful that the protocol retains wire compatibility with curr=
ent use<br>
=C2=A0 =C2=A0of the code point.=C2=A0 Once that is no longer true, the new =
work needs<br>
=C2=A0 =C2=A0to change to a different code point (and register that use at =
the<br>
=C2=A0 =C2=A0appropriate time).<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Hence, unless there&#39;s a strong technical reason =
for the proposed change of the registration, I&#39;m hesitant to make the u=
pdate at this time.<u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif"><u></u>=C2=A0<u></u></span></p>
</div>
<blockquote style=3D"border-top:none;border-right:none;border-bottom:none;b=
order-left:1pt solid rgb(204,204,204);padding:0cm 0cm 0cm 6pt;margin:5pt 0c=
m 5pt 4.8pt">
<div>
<div>
<div>
<div>
<blockquote style=3D"border-top:none;border-right:none;border-bottom:none;b=
order-left:1pt solid rgb(204,204,204);padding:0cm 0cm 0cm 6pt;margin:5pt 0c=
m 5pt 4.8pt">
<div>
<div>
<p class=3D"MsoNormal">Second, if the TLV Type or sub-TLV Type is Experimen=
tal, similarly to Private Use, does it need to fill the vendor=E2=80=99s SM=
I Private Enterprise Code in the first four octets of Value
 field? Please give some clarifications any expected restrictions on experi=
mental scope. Such as said in [RFC8126], whether it=E2=80=99s acceptable to=
 run experiments using those code points over the open Internet or whether =
such experiments should be confined to more
 closed environments.<u></u><u></u></p>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal">GIM&gt;&gt; True, the Experimental code points are s=
imilar to the ones designeted=C2=A0to Private Use, as explained in Section =
4.2. I&#39;ve followed
<a href=3D"https://mailarchive.ietf.org/arch/browse/mpls/?gbt=3D1&amp;index=
=3DewEzqMkkwwOxdChj_NfF_G_CZKo" target=3D"_blank">
the discussion on MPLS WG list=C2=A0</a>that dealt with the issues related =
to allocation of TLV and sub-TLV code points. I couldn&#39;t find the issue=
 of the experimental scope being reflected in the latest version of the
<a href=3D"https://datatracker.ietf.org/doc/draft-ietf-mpls-lsp-ping-regist=
ries-update/?include_text=3D1" target=3D"_blank">
draft</a>. Persnally, I don&#39;t think that we need to restrict the scope =
of using the experimental type. What do you think?<u></u><u></u></p>
</div>
<blockquote style=3D"border-top:none;border-right:none;border-bottom:none;b=
order-left:1pt solid rgb(204,204,204);padding:0cm 0cm 0cm 6pt;margin:5pt 0c=
m 5pt 4.8pt">
<div>
<div>
<p class=3D"MsoNormal">=C2=A0<span style=3D"color:rgb(31,73,125)">[Yali] Fi=
ne. If we want to follow the</span>
<a href=3D"https://datatracker.ietf.org/doc/draft-ietf-mpls-lsp-ping-regist=
ries-update/?include_text=3D1" target=3D"_blank">
draft</a><span style=3D"color:rgb(31,73,125)">, I suggest merging the range=
 of Private Use into the FCFS and revising the following sentence in sectio=
n 4.</span><u></u><u></u></p>
<pre><span style=3D"color:rgb(31,73,125)">Old: =C2=A0</span><span style=3D"=
color:black">If a Type value for TLV or sub-</span><u></u><u></u></pre>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:&quot;Cour=
ier New&quot;;color:black">=C2=A0=C2=A0 TLV is in the range for Vendor Priv=
ate Use, the Length MUST be at</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:&quot;Cour=
ier New&quot;;color:black">=C2=A0=C2=A0 least 4, and the first four octets =
MUST be that vendor&#39;s Structure of</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:&quot;Cour=
ier New&quot;;color:black">=C2=A0=C2=A0 Management Information (SMI) Privat=
e Enterprise Code, as recorded in</span><u></u><u></u></p>
<pre><span style=3D"color:black">=C2=A0=C2=A0 IANA&#39;s SMI Private Enterp=
rise Codes sub-registry, in network octet order.</span><u></u><u></u></pre>
<p class=3D"MsoNormal"><span style=3D"color:rgb(31,73,125)">New: If a Type =
value for TLV or sub-TLV is in the range for Experimental Use, the Length M=
UST be at least 4, and the first four octets MUST be that vendor&#39;s
 Structure of Management Information (SMI) Private Enterprise Code, as reco=
rded in IANA&#39;s SMI Private Enterprise Codes sub-registry, in network oc=
tet order. In the standards compliant implementations, if the unrecognized =
TLV or sun-TLV is from the Experimental
 Use range, the TLVs should be silently ignored.</span><u></u><u></u></p>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal">GIM2&gt;&gt; Thank you for proposing the new text. I=
 think that &quot;silently ignored&quot; for a TLV from the Experimental ra=
nge is very different from=C2=A0how=C2=A0the handling of the unrecognized T=
LV defined in the specification. To support symmetrical packets
 in STAMP, the Session-Reflector must somehow compensate the length of the =
unrecognized TLV. Should it replace the unrecognized Experimental TLV with =
the Extra Padding TLV? Or copy the unrecognized Experimental TLV into the r=
eflected packet as-is, i.e., without
 setting the U flag? What do you think?<u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">[Yali2] first, I find there may be an editor=
ial error that =E2=80=9Cthe U flag MUST be set to 1 in an extended STAMP te=
st packet which is transmitted by a Session-Sender=E2=80=9D.
 Should it be that =E2=80=9Cthe U flag MUST be set to 0 in an extended STAM=
P test packet which is transmitted by a Session-Sender=E2=80=9D? And if the=
 unrecognized TLV is not understood by the session-reflector, I suggest to =
copy the unrecognized TLV into the reflected packet
 as-is, and set the U flag to 1. <u></u><u></u></span></p>
</div>
<blockquote style=3D"border-top:none;border-right:none;border-bottom:none;b=
order-left:1pt solid rgb(204,204,204);padding:0cm 0cm 0cm 6pt;margin:5pt 0c=
m 5pt 4.8pt">
<div>
<div>
<div>
<div>
<blockquote style=3D"border-top:none;border-right:none;border-bottom:none;b=
order-left:1pt solid rgb(204,204,204);padding:0cm 0cm 0cm 6pt;margin:5pt 0c=
m 5pt 4.8pt">
<div>
<div>
<p class=3D"MsoNormal">Best regards,<u></u><u></u></p>
<p class=3D"MsoNormal">Yali<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<pre style=3D"background:white"><span style=3D"font-size:9pt;font-family:Co=
nsolas;color:rgb(33,37,41)">=C2=A0</span><u></u><u></u></pre>
<pre style=3D"background:white"><span style=3D"font-size:9pt;font-family:Co=
nsolas;color:rgb(33,37,41)">---------- Forwarded message ---------</span><u=
></u><u></u></pre>
<pre style=3D"background:white"><span style=3D"font-size:9pt;font-family:Co=
nsolas;color:rgb(33,37,41)">From: </span><a href=3D"mailto:&amp;lt;internet=
-drafts@ietf.org&amp;gt;" target=3D"_blank"><span style=3D"font-size:9pt;fo=
nt-family:Consolas;color:rgb(51,122,183)">&lt;internet-drafts@ietf.org&gt;<=
/span></a><u></u><u></u></pre>
<pre style=3D"background:white"><span style=3D"font-size:9pt;font-family:Co=
nsolas;color:rgb(33,37,41)">Date: Fri, Aug 21, 2020 at 1:01 PM</span><u></u=
><u></u></pre>
<pre style=3D"background:white"><span style=3D"font-size:9pt;font-family:Co=
nsolas;color:rgb(33,37,41)">Subject: New Version Notification for</span><u>=
</u><u></u></pre>
<pre style=3D"background:white"><span style=3D"font-size:9pt;font-family:Co=
nsolas;color:rgb(33,37,41)">draft-ietf-ippm-stamp-option-tlv-09.txt</span><=
u></u><u></u></pre>
<pre style=3D"background:white"><span style=3D"font-size:9pt;font-family:Co=
nsolas;color:rgb(33,37,41)">To: Richard Foote </span><a href=3D"mailto:&amp=
;lt;footer.foote@nokia.com&amp;gt;" target=3D"_blank"><span style=3D"font-s=
ize:9pt;font-family:Consolas;color:rgb(51,122,183)">&lt;footer.foote@nokia.=
com&gt;</span></a><span style=3D"font-size:9pt;font-family:Consolas;color:r=
gb(33,37,41)">om&gt;, Greg Mirsky &lt;</span><u></u><u></u></pre>
<pre style=3D"background:white"><a href=3D"mailto:gregimirsky@gmail.com&amp=
;gt;" target=3D"_blank"><span style=3D"font-size:9pt;font-family:Consolas;c=
olor:rgb(51,122,183)">gregimirsky@gmail.com&gt;</span></a><span style=3D"fo=
nt-size:9pt;font-family:Consolas;color:rgb(33,37,41)">gt;, Henrik Nydell </=
span><a href=3D"mailto:&amp;lt;hnydell@accedian.com&amp;gt;" target=3D"_bla=
nk"><span style=3D"font-size:9pt;font-family:Consolas;color:rgb(51,122,183)=
">&lt;hnydell@accedian.com&gt;</span></a><span style=3D"font-size:9pt;font-=
family:Consolas;color:rgb(33,37,41)">om&gt;, Adi Masputra &lt;</span><u></u=
><u></u></pre>
<pre style=3D"background:white"><a href=3D"mailto:adi@apple.com&amp;gt;" ta=
rget=3D"_blank"><span style=3D"font-size:9pt;font-family:Consolas;color:rgb=
(51,122,183)">adi@apple.com&gt;</span></a><span style=3D"font-size:9pt;font=
-family:Consolas;color:rgb(33,37,41)">gt;, Ernesto Ruffini </span><a href=
=3D"mailto:&amp;lt;eruffini@outsys.org&amp;gt;" target=3D"_blank"><span sty=
le=3D"font-size:9pt;font-family:Consolas;color:rgb(51,122,183)">&lt;eruffin=
i@outsys.org&gt;</span></a><span style=3D"font-size:9pt;font-family:Consola=
s;color:rgb(33,37,41)">rg&gt;, Xiao Min &lt;</span><u></u><u></u></pre>
<pre style=3D"background:white"><a href=3D"mailto:xiao.min2@zte.com.cn&amp;=
gt;" target=3D"_blank"><span style=3D"font-size:9pt;font-family:Consolas;co=
lor:rgb(51,122,183)">xiao.min2@zte.com.cn&gt;</span></a><u></u><u></u></pre=
>
<pre style=3D"background:white"><span style=3D"font-size:9pt;font-family:Co=
nsolas;color:rgb(33,37,41)">=C2=A0</span><u></u><u></u></pre>
<pre style=3D"background:white"><span style=3D"font-size:9pt;font-family:Co=
nsolas;color:rgb(33,37,41)">=C2=A0</span><u></u><u></u></pre>
<pre style=3D"background:white"><span style=3D"font-size:9pt;font-family:Co=
nsolas;color:rgb(33,37,41)">=C2=A0</span><u></u><u></u></pre>
<pre style=3D"background:white"><span style=3D"font-size:9pt;font-family:Co=
nsolas;color:rgb(33,37,41)">A new version of I-D, draft-ietf-ippm-stamp-opt=
ion-tlv-09.txt</span><u></u><u></u></pre>
<pre style=3D"background:white"><span style=3D"font-size:9pt;font-family:Co=
nsolas;color:rgb(33,37,41)">has been successfully submitted by Greg Mirsky =
and posted to the</span><u></u><u></u></pre>
<pre style=3D"background:white"><span style=3D"font-size:9pt;font-family:Co=
nsolas;color:rgb(33,37,41)">IETF repository.</span><u></u><u></u></pre>
<pre style=3D"background:white"><span style=3D"font-size:9pt;font-family:Co=
nsolas;color:rgb(33,37,41)">=C2=A0</span><u></u><u></u></pre>
<pre style=3D"background:white"><span style=3D"font-size:9pt;font-family:Co=
nsolas;color:rgb(33,37,41)">Name:=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0 draft-ietf-ippm-stamp-option-tlv</span><u></u><u></u></p=
re>
<pre style=3D"background:white"><span style=3D"font-size:9pt;font-family:Co=
nsolas;color:rgb(33,37,41)">Revision:=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 0=
9</span><u></u><u></u></pre>
<pre style=3D"background:white"><span style=3D"font-size:9pt;font-family:Co=
nsolas;color:rgb(33,37,41)">Title:=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0 Simple Two-way Active Measurement Protocol Optional</span><=
u></u><u></u></pre>
<pre style=3D"background:white"><span style=3D"font-size:9pt;font-family:Co=
nsolas;color:rgb(33,37,41)">Extensions</span><u></u><u></u></pre>
<pre style=3D"background:white"><span style=3D"font-size:9pt;font-family:Co=
nsolas;color:rgb(33,37,41)">Document date:=C2=A0 2020-08-21</span><u></u><u=
></u></pre>
<pre style=3D"background:white"><span style=3D"font-size:9pt;font-family:Co=
nsolas;color:rgb(33,37,41)">Group:=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0 ippm</span><u></u><u></u></pre>
<pre style=3D"background:white"><span style=3D"font-size:9pt;font-family:Co=
nsolas;color:rgb(33,37,41)">Pages:=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0 32</span><u></u><u></u></pre>
<pre style=3D"background:white"><span style=3D"font-size:9pt;font-family:Co=
nsolas;color:rgb(33,37,41)">URL:</span><u></u><u></u></pre>
<pre style=3D"background:white"><a href=3D"https://www.ietf.org/internet-dr=
afts/draft-ietf-ippm-stamp-option-tlv-09.txt" target=3D"_blank"><span style=
=3D"font-size:9pt;font-family:Consolas;color:rgb(51,122,183)">https://www.i=
etf.org/internet-drafts/draft-ietf-ippm-stamp-option-tlv-09.txt</span></a><=
u></u><u></u></pre>
<pre style=3D"background:white"><span style=3D"font-size:9pt;font-family:Co=
nsolas;color:rgb(33,37,41)">Status:</span><u></u><u></u></pre>
<pre style=3D"background:white"><a href=3D"https://datatracker.ietf.org/doc=
/draft-ietf-ippm-stamp-option-tlv/" target=3D"_blank"><span style=3D"font-s=
ize:9pt;font-family:Consolas;color:rgb(51,122,183)">https://datatracker.iet=
f.org/doc/draft-ietf-ippm-stamp-option-tlv/</span></a><u></u><u></u></pre>
<pre style=3D"background:white"><span style=3D"font-size:9pt;font-family:Co=
nsolas;color:rgb(33,37,41)">Htmlized:</span><u></u><u></u></pre>
<pre style=3D"background:white"><a href=3D"https://tools.ietf.org/html/draf=
t-ietf-ippm-stamp-option-tlv-09" target=3D"_blank"><span style=3D"font-size=
:9pt;font-family:Consolas;color:rgb(51,122,183)">https://tools.ietf.org/htm=
l/draft-ietf-ippm-stamp-option-tlv-09</span></a><u></u><u></u></pre>
<pre style=3D"background:white"><span style=3D"font-size:9pt;font-family:Co=
nsolas;color:rgb(33,37,41)">Htmlized:</span><u></u><u></u></pre>
<pre style=3D"background:white"><a href=3D"https://datatracker.ietf.org/doc=
/html/draft-ietf-ippm-stamp-option-tlv" target=3D"_blank"><span style=3D"fo=
nt-size:9pt;font-family:Consolas;color:rgb(51,122,183)">https://datatracker=
.ietf.org/doc/html/draft-ietf-ippm-stamp-option-tlv</span></a><u></u><u></u=
></pre>
<pre style=3D"background:white"><span style=3D"font-size:9pt;font-family:Co=
nsolas;color:rgb(33,37,41)">Diff:</span><u></u><u></u></pre>
<pre style=3D"background:white"><a href=3D"https://www.ietf.org/rfcdiff?url=
2=3Ddraft-ietf-ippm-stamp-option-tlv-09" target=3D"_blank"><span style=3D"f=
ont-size:9pt;font-family:Consolas;color:rgb(51,122,183)">https://www.ietf.o=
rg/rfcdiff?url2=3Ddraft-ietf-ippm-stamp-option-tlv-09</span></a><u></u><u><=
/u></pre>
<pre style=3D"background:white"><span style=3D"font-size:9pt;font-family:Co=
nsolas;color:rgb(33,37,41)">=C2=A0</span><u></u><u></u></pre>
<pre style=3D"background:white"><span style=3D"font-size:9pt;font-family:Co=
nsolas;color:rgb(33,37,41)">Abstract:</span><u></u><u></u></pre>
<pre style=3D"background:white"><span style=3D"font-size:9pt;font-family:Co=
nsolas;color:rgb(33,37,41)">=C2=A0=C2=A0 This document describes optional e=
xtensions to Simple Two-way Active</span><u></u><u></u></pre>
<pre style=3D"background:white"><span style=3D"font-size:9pt;font-family:Co=
nsolas;color:rgb(33,37,41)">=C2=A0=C2=A0 Measurement Protocol (STAMP) that =
enable measurement of performance</span><u></u><u></u></pre>
<pre style=3D"background:white"><span style=3D"font-size:9pt;font-family:Co=
nsolas;color:rgb(33,37,41)">=C2=A0=C2=A0 metrics.=C2=A0 The document also d=
efines a STAMP Test Session Identifier</span><u></u><u></u></pre>
<pre style=3D"background:white"><span style=3D"font-size:9pt;font-family:Co=
nsolas;color:rgb(33,37,41)">=C2=A0=C2=A0 and thus updates RFC 8762.</span><=
u></u><u></u></pre>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</div>

</blockquote></div>

--00000000000057dd2a05ae45da9d--


From nobody Tue Sep  1 20:53:23 2020
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Date: Tue, 1 Sep 2020 20:53:05 -0700
From: Benjamin Kaduk <kaduk@mit.edu>
To: Greg Mirsky <gregimirsky@gmail.com>
Cc: The IESG <iesg@ietf.org>, draft-ietf-ippm-stamp-option-tlv@ietf.org, IPPM Chairs <ippm-chairs@ietf.org>, IETF IPPM WG <ippm@ietf.org>, Yali Wang <wangyali11@huawei.com>
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Subject: Re: [ippm] Benjamin Kaduk's Discuss on draft-ietf-ippm-stamp-option-tlv-07: (with DISCUSS and COMMENT)
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Hi Greg,

Thanks for the updates;

On Wed, Jul 22, 2020 at 03:24:54PM -0700, Greg Mirsky wrote:
> 
> PS. I've clipped the COMMENTS as these now have the discussion thread
> of their own.
> 
> On Thu, Jul 16, 2020 at 7:48 PM Benjamin Kaduk <kaduk@mit.edu> wrote:
> >
> > On Thu, Jul 16, 2020 at 05:38:08PM -0700, Greg Mirsky wrote:
[...]
> GIM2>> I have some reservations to say that a particular TLV MUST be
> accompanied by the HMAC TLV. If a domain secured, an operator may use
> a TLV, e.g., CoS TLV, without authentication. I think that the current
> text:
>    The HMAC TLV MAY be used to protect the integrity of STAMP extensions
>    in STAMP unauthenticated mode.
> can be expanded to require that an implementation can enable
> authentication of extensions via the management plane. It might be as:
> NEW TEXT:
>    The HMAC TLV MAY be used to protect the integrity of STAMP extensions
>    in STAMP unauthenticated mode.  An implementation of STAMP extensions
>    MUST provide controls to enable the integrity protection of STAMP
>    extensions in STAMP unauthenticated mode.
> Would the updated text be acceptable?

In light of the long delay (entirely my fault) in responding, I've prepared
a new ballot position to cover this topic and the other notes I made from
my re-review.  But in short: I can accept the weaker form of mandatory
behavior that you propose here, but we should still clearly document the
considerations that come into play for unauthenticated operation.

Thanks, and sorry again for the slow response,

Ben

> 
> >
> > I think the idea was to require the HMAC TLV to accompany those TLVs that
> > represent "control information", yes.  My initial read of the document
> > (reflected in my longer comments) says that the Location and Timestamp
> > Information TLVs would be considered to contain such "control information",
> > though on reread perhaps the Timestamp Information is not always considered
> > sensitive.  I'm on the fence about Location, and I think that Class of
> > Service is pretty clearly on the "control information" side of things
> > (since it affects the headers of the containing IP packet and consequently
> > the behavior of the network).
> 
> GIM2>> I agree that CoS is very close to what we consider "control
> information" as it includes information that affects how the reflected
> test packet is transmitted. But as in RFC 8762 itself, HMAC TLV is
> defined as optional in STAMP unauthenticated mode and, as I think of
> it, that leaves the choice to an operator whether to protect the
> integrity of the CoS TLV or not. Do you think that such arrangement is
> acceptable?


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Benjamin Kaduk has entered the following ballot position for
draft-ietf-ippm-stamp-option-tlv-09: 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 this
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-ippm-stamp-option-tlv/



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

Thanks for all the updates; we've made good progress.

I think we're still not converged on the DSCP handling, though.  I have
a bit more exposition in the COMMENT section, but in short, my
understanding is that we're setting up a session-reflector to incur
unbounded levels of risk with hard protocol requirements.  I think we
need to provide a way to bound that risk, for example by allowing the
Session-Reflector to selectively choose to treat the CoS TLV as
unimplemented (set the U flag in its reflected packet) or some other
mechanism for local policy to filter what DSCP codepoints are set in
reflected packets (ideally, indicating that the policy made a change).

Also, there's a bit of fallout from the flags reworking that's left to
cleanup in Section 4: we now have the Session-Sender set the U flag to
1, so this text no longer makes sense:

% A STAMP system, i.e., either a Session-Sender or a Session-Reflector,
% that has received a STAMP test packet with extension TLVs MUST
% validate each TLV:
%
%    If the U flag is set, the STAMP system MUST skip the processing of
%    the TLV.

I think it should just apply to the Session-Sender for this case -- the
Session-Reflector doesn't need to check the received U flag, since the
Session-Sender will not be generating TLVs it does not understand.
(Whether or not to keep the behavior for the M and I flags as applying
to both Session-Sender and Session-Reflector vs. just Session-Sender
does not immediately seem to be of much consequence.


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

My most significant remaining comments are on the Security
Considerations (Section 6):

The security of the HMAC mechanism is not complete, since it is
susceptible to replay attack.  As such, when HMAC is in use, it is
important to check that the received sequence numbers are (at least
mostly) monotonic and to detect replays.  While replayed packets do not
always indicate an attack (depending on the network technology) they are
still a noteworthy condition, and we should say something about whether
we expect to produce a response to each received instance or to suppress
replies to replayed input.

   Monitoring and optional control of DSCP do not appear to introduce
   any additional security threat to hosts that communicate with STAMP
   as defined in [RFC8762].  As this specification defined the mechanism
   to test DSCP mapping, this document inherits all the security

I'm afraid I still don't understand the reasoning here.  In my
understanding, the risk stems from the semantics of the DCSP field being
(for at least some codepoints) site-local, there not being a guarantee
that the session-sender and session-reflector are on the same network
(and thus, using the same DSCP semantics), and the hard requirement for
the Session-Reflector to set the DCSP value indicated by the
Session-Sender.  A mechanism for a remote entity to induce generation of
local packets with unspecified semantics is a risk that cannot be
qualified at protocol-design time, since the possible outcomes are
inherently unspecified.  This is analogous to the situation with
undefined behavior in programming languages like C -- the programmer is
flat-out required to avoid it, because literally anything could go wrong
if undefined behavior is triggered.

This is especially risky when there is the possibility for the
Session-Reflector to act on packets that do not have any form of
authentication (i.e., could be spoofed from off-path).  But we do not
mention this risk at all, let alone give guidance on its mitigation.
(Discussion of the security considerations of unauthenticated operation
would ideally be generalized to all actions/TLVs that have side effects,
not just the specific case of setting the DSCP codepoint.)

Section 4.2

I'd suggest saying that all fields that are not filled are transmitted
with all bits set to zero.

Section 4.2.1

   o  Source MAC Address sub-TLV - is a 12-octet-long sub-TLV.  The Type
      value is TBA9.  The value of the Length field MUST equal to 8.
      The Value field is a 12-octet-long MBZ field that MUST be zeroed
      on transmission and ignored on receipt.

Value should be 8-octets-long, no?

Section 4.2.2

   A Session-Sender MAY include the Source MAC Address sub-TLV is the
   Location TLV.  If the Session-Reflector receives the Location TLV

nit: s/is/in/

Section 4.3

   MUST NOT fill any information fields except for STAMP TLV Flags,
   Type, and Length.  All other fields MUST be filled with zeroes The

nit: missing full stop.




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From: Giuseppe Fioccola <giuseppe.fioccola@huawei.com>
To: "li_zhenqiang@hotmail.com" <li_zhenqiang@hotmail.com>, ippm <ippm@ietf.org>
Thread-Topic: [ippm] Welcome comment on Performance Measurement on LAG
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Date: Wed, 2 Sep 2020 12:57:23 +0000
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Subject: Re: [ippm] Welcome comment on Performance Measurement on LAG
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Hi Zhenqiang,
I have read the document about PM on LAG. I think that the scope is clear a=
nd useful. I would suggest to emphasize within the draft, maybe in the Intr=
oduction section, that, for LAG, other passive and hybrid methods (like Alt=
Mark, IOAM,...) can monitor only the link crossed by traffic or an average =
value for the LAG. To be aware and measure the performance of each link tha=
t is member of a LAG, the only possible way is by using active techniques t=
hat draft-li-ippm-pm-on-lag aims to extend.

Regards,

Giuseppe


From: ippm [mailto:ippm-bounces@ietf.org] On Behalf Of li_zhenqiang@hotmail=
.com
Sent: Friday, August 7, 2020 8:44 AM
To: ippm <ippm@ietf.org>
Subject: [ippm] Welcome comment on Performance Measurement on LAG

Hello All,

Performance Measurement on LAG, https://www.ietf.org/internet-drafts/draft-=
li-ippm-pm-on-lag-01.txt<https://www.ietf.org/internet-drafts/draft-li-ippm=
-pm-on-lag-00.txt>, was not presented in the past virtual meeting due to li=
mited time. This doc defines extensions to OWAMP, TWAMP and STAMP to implem=
ent performance measurement on every member link of a Link Aggregation Grou=
p (LAG).  With the measured metrics of each member link of a LAG, it enable=
s operators to enforce performance metric based traffic steering policy amo=
ng the member links.

The requirements come from field networks, where the link delays of the mem=
ber links of a LAG are different because the member links are over differen=
t transport paths.  To provide low delay service to time sensitive traffic,=
 we have to know the link delay of each member link of a LAG and then steer=
 traffic accordingly.

We appreciate all the comments and suggestions.

Best Regards,
Zhenqiang Li
________________________________
li_zhenqiang@hotmail.com<mailto:li_zhenqiang@hotmail.com>

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<p class=3D"MsoNormal"><a name=3D"_MailEndCompose"><span style=3D"font-size=
:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D;mso-fareas=
t-language:EN-US">Hi Zhenqiang,<o:p></o:p></span></a></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D;mso-fareast-language:EN-US">I have rea=
d the document about PM on LAG. I think that the scope is clear and useful.=
 I would suggest to emphasize within the draft,
 maybe in the Introduction section, that, for LAG, other passive and hybrid=
 methods (like AltMark, IOAM,&#8230;) can monitor only the link crossed by =
traffic or an average value for the LAG. To be aware and measure the perfor=
mance of each link that is member of a
 LAG, the only possible way is by using active techniques that draft-li-ipp=
m-pm-on-lag aims to extend.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p>&nbsp=
;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D;mso-fareast-language:EN-US">Regards,<o=
:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p>&nbsp=
;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D;mso-fareast-language:EN-US">Giuseppe<o=
:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p>&nbsp=
;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p>&nbsp=
;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> ippm [mailto:ippm-bounces@ietf=
.org]
<b>On Behalf Of </b>li_zhenqiang@hotmail.com<br>
<b>Sent:</b> Friday, August 7, 2020 8:44 AM<br>
<b>To:</b> ippm &lt;ippm@ietf.org&gt;<br>
<b>Subject:</b> [ippm] Welcome comment on Performance Measurement on LAG<o:=
p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Mi=
crosoft YaHei&quot;,sans-serif;color:black">Hello All,<o:p></o:p></span></p=
>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Mi=
crosoft YaHei&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Mi=
crosoft YaHei&quot;,sans-serif;color:black">Performance Measurement on LAG,=
&nbsp;</span><a href=3D"https://www.ietf.org/internet-drafts/draft-li-ippm-=
pm-on-lag-00.txt"><span style=3D"font-size:10.5pt;font-family:&quot;Microso=
ft YaHei&quot;,sans-serif">https://www.ietf.org/internet-drafts/draft-li-ip=
pm-pm-on-lag-01.txt</span></a><span style=3D"font-size:10.5pt;font-family:&=
quot;Microsoft YaHei&quot;,sans-serif;color:black">,
 was not presented in the past virtual meeting due to limited time. This do=
c defines extensions to&nbsp;OWAMP, TWAMP and&nbsp;STAMP to implement&nbsp;=
performance measurement on every member link of a Link Aggregation&nbsp;Gro=
up (LAG). &nbsp;With the measured metrics of each member
 link of a&nbsp;LAG, it enables operators to enforce performance metric bas=
ed traffic&nbsp;steering policy among the member links.<o:p></o:p></span></=
p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Mi=
crosoft YaHei&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Mi=
crosoft YaHei&quot;,sans-serif;color:black">The requirements come from fiel=
d networks, where&nbsp;the link delays of the member links of a LAG are&nbs=
p;different because the member links are over different
 transport&nbsp;paths. &nbsp;To provide low delay service to time sensitive=
 traffic, we&nbsp;have to know the link delay of each member link of a LAG =
and then&nbsp;steer traffic accordingly.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Mi=
crosoft YaHei&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Mi=
crosoft YaHei&quot;,sans-serif;color:black">We appreciate all the comments =
and suggestions.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Mi=
crosoft YaHei&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Mi=
crosoft YaHei&quot;,sans-serif;color:black">Best Regards,<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Mi=
crosoft YaHei&quot;,sans-serif;color:black">Zhenqiang Li<o:p></o:p></span><=
/p>
</div>
<div>
<div>
<div class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;=
Microsoft YaHei&quot;,sans-serif;color:black">
<hr size=3D"2" width=3D"420" style=3D"width:157.5pt" noshade=3D"" style=3D"=
color:#B5C4DF" align=3D"left">
</span></div>
</div>
</div>
<div>
<div style=3D"margin-left:7.5pt;margin-top:7.5pt;margin-right:7.5pt;margin-=
bottom:7.5pt">
<div>
<p class=3D"MsoNormal"><a href=3D"mailto:li_zhenqiang@hotmail.com"><span st=
yle=3D"font-size:10.0pt;font-family:&quot;Verdana&quot;,sans-serif">li_zhen=
qiang@hotmail.com</span></a><span style=3D"font-size:10.0pt;font-family:&qu=
ot;Verdana&quot;,sans-serif;color:black"><o:p></o:p></span></p>
</div>
</div>
</div>
</div>
</body>
</html>

--_000_b8038bc4b45f439dac5c21a7cf8e52d7huaweicom_--


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From: Tommy Pauly <tpauly@apple.com>
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Hello all,

Thank you for your feedback! It sounds like we do have consensus that =
this document is something we think is ready to progress, once several =
comments and nits are addressed.

Authors, please submit an updated version of draft when possible to =
address the feedback from Jos=C3=A9 Ignacio, Joachim, Frank, and Greg. =
Once that had been done, we=E2=80=99ll submit this to the IESG.

Best,
Tommy & Ian

> On Aug 14, 2020, at 2:21 PM, Tommy Pauly =
<tpauly=3D40apple.com@dmarc.ietf.org> wrote:
>=20
> Hello IPPM,
>=20
> As discussed at IETF 108, draft-ietf-ippm-capacity-metric-method is =
stable, and the group felt it is ready for Working Group Last Call.
>=20
> The latest version can be found here: =
https://tools.ietf.org/html/draft-ietf-ippm-capacity-metric-method-02 =
<https://tools.ietf.org/html/draft-ietf-ippm-capacity-metric-method-02>
>=20
> The last call will end on Wednesday, September 2. Please reply to =
ippm@ietf.org <mailto:ippm@ietf.org> with your reviews and comments, and =
indicate if you think the document is ready to progress!
>=20
> Best,
> Tommy & Ian
> _______________________________________________
> ippm mailing list
> ippm@ietf.org
> https://www.ietf.org/mailman/listinfo/ippm


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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; line-break: after-white-space;" class=3D"">Hello=
 all,<div class=3D""><br class=3D""></div><div class=3D"">Thank you for =
your feedback! It sounds like we do have consensus that this document is =
something we think is ready to progress, once several comments and nits =
are addressed.</div><div class=3D""><br class=3D""></div><div =
class=3D"">Authors, please submit an updated version of draft when =
possible to address the feedback from Jos=C3=A9 Ignacio, Joachim, Frank, =
and Greg. Once that had been done, we=E2=80=99ll submit this to the =
IESG.</div><div class=3D""><br class=3D""></div><div =
class=3D"">Best,</div><div class=3D"">Tommy &amp; Ian<br =
class=3D""><div><br class=3D""><blockquote type=3D"cite" class=3D""><div =
class=3D"">On Aug 14, 2020, at 2:21 PM, Tommy Pauly &lt;<a =
href=3D"mailto:tpauly=3D40apple.com@dmarc.ietf.org" =
class=3D"">tpauly=3D40apple.com@dmarc.ietf.org</a>&gt; wrote:</div><br =
class=3D"Apple-interchange-newline"><div class=3D""><meta =
http-equiv=3D"Content-Type" content=3D"text/html; charset=3Dus-ascii" =
class=3D""><div style=3D"word-wrap: break-word; -webkit-nbsp-mode: =
space; line-break: after-white-space;" class=3D"">Hello IPPM,<div =
class=3D""><br class=3D""></div><div class=3D"">As discussed at IETF =
108, draft-ietf-ippm-capacity-metric-method is stable, and the group =
felt it is ready for Working Group Last Call.</div><div class=3D""><br =
class=3D""></div><div class=3D"">The latest version can be found =
here:&nbsp;<a =
href=3D"https://tools.ietf.org/html/draft-ietf-ippm-capacity-metric-method=
-02" =
class=3D"">https://tools.ietf.org/html/draft-ietf-ippm-capacity-metric-met=
hod-02</a></div><div class=3D""><br class=3D""></div><div class=3D"">The =
last call will end on <b class=3D"">Wednesday, September 2</b>. Please =
reply to <a href=3D"mailto:ippm@ietf.org" =
class=3D"">ippm@ietf.org</a>&nbsp;with your reviews and comments, and =
indicate if you think the document is ready to progress!</div><div =
class=3D""><br class=3D""></div><div class=3D"">Best,</div><div =
class=3D"">Tommy &amp; =
Ian</div></div>_______________________________________________<br =
class=3D"">ippm mailing list<br class=3D""><a =
href=3D"mailto:ippm@ietf.org" class=3D"">ippm@ietf.org</a><br =
class=3D"">https://www.ietf.org/mailman/listinfo/ippm<br =
class=3D""></div></blockquote></div><br class=3D""></div></body></html>=

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From: "MORTON, ALFRED C (AL)" <acm@research.att.com>
To: Tommy Pauly <tpauly@apple.com>, "IETF IPPM WG (ippm@ietf.org)" <ippm@ietf.org>
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Thread-Topic: [ippm] WGLC for draft-ietf-ippm-capacity-metric-method
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Date: Wed, 2 Sep 2020 16:38:42 +0000
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Subject: Re: [ippm] WGLC for draft-ietf-ippm-capacity-metric-method
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tyle>body { line-height: 1.5; }blockquote { margin-top: 0px; margin-bottom:=
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tyle></head><body>=0A=
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<div><span></span>Hi Giuseppe,</div><div><br></div><div>Very good suggestio=
n! Thank you very much. Your suggestion will be incorporated in the coming =
version soon.</div>=0A=
<div><br></div><div>Best Regards,</div><div>Zhenqiang Li</div><hr style=3D"=
width: 210px; height: 1px;" color=3D"#b5c4df" size=3D"1" align=3D"left">=0A=
<div><span><div style=3D"MARGIN: 10px; FONT-FAMILY: verdana; FONT-SIZE: 10p=
t"><div>li_zhenqiang@hotmail.com</div></div></span></div>=0A=
<blockquote style=3D"margin-Top: 0px; margin-Bottom: 0px; margin-Left: 0.5e=
m"><div>&nbsp;</div><div style=3D"border:none;border-top:solid #B5C4DF 1.0p=
t;padding:3.0pt 0cm 0cm 0cm"><div style=3D"PADDING-RIGHT: 8px; PADDING-LEFT=
: 8px; FONT-SIZE: 12px;FONT-FAMILY:tahoma;COLOR:#000000; BACKGROUND: #efefe=
f; PADDING-BOTTOM: 8px; PADDING-TOP: 8px"><div><b>From:</b>&nbsp;<a href=3D=
"mailto:giuseppe.fioccola@huawei.com" style=3D"color: blue; text-decoration=
: underline;">Giuseppe Fioccola</a></div><div><b>Date:</b>&nbsp;2020-09-02&=
nbsp;20:57</div><div><b>To:</b>&nbsp;<a href=3D"mailto:li_zhenqiang@hotmail=
.com" style=3D"color: blue; text-decoration: underline;">li_zhenqiang@hotma=
il.com</a>; <a href=3D"mailto:ippm@ietf.org" style=3D"color: blue; text-dec=
oration: underline;">ippm</a></div><div><b>Subject:</b>&nbsp;RE: [ippm] Wel=
come comment on Performance Measurement on LAG</div></div></div><div><div c=
lass=3D"FoxDiv20200903141130268125">=0A=
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<div class=3D"WordSection1" style=3D"page: WordSection1;">=0A=
<p class=3D"MsoNormal" style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; =
font-family: SimSun;"><a name=3D"_MailEndCompose"><span style=3D"font-size:=
11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D;mso-fareast=
-language:EN-US">Hi Zhenqiang,<o:p></o:p></span></a></p>=0A=
<p class=3D"MsoNormal" style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; =
font-family: SimSun;"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,sans-serif;color:#1F497D;mso-fareast-language:EN-US">I have read=
 the document about PM on LAG. I think that the scope is clear and useful. =
I would suggest to emphasize within the draft,=0A=
 maybe in the Introduction section, that, for LAG, other passive and hybrid=
 methods (like AltMark, IOAM,=E2=80=A6) can monitor only the link crossed b=
y traffic or an average value for the LAG. To be aware and measure the perf=
ormance of each link that is member of a=0A=
 LAG, the only possible way is by using active techniques that draft-li-ipp=
m-pm-on-lag aims to extend.<o:p></o:p></span></p>=0A=
<p class=3D"MsoNormal" style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; =
font-family: SimSun;"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p>&nbsp;=
</o:p></span></p>=0A=
<p class=3D"MsoNormal" style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; =
font-family: SimSun;"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,sans-serif;color:#1F497D;mso-fareast-language:EN-US">Regards,<o:=
p></o:p></span></p>=0A=
<p class=3D"MsoNormal" style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; =
font-family: SimSun;"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p>&nbsp;=
</o:p></span></p>=0A=
<p class=3D"MsoNormal" style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; =
font-family: SimSun;"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,sans-serif;color:#1F497D;mso-fareast-language:EN-US">Giuseppe<o:=
p></o:p></span></p>=0A=
<p class=3D"MsoNormal" style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; =
font-family: SimSun;"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p>&nbsp;=
</o:p></span></p>=0A=
<p class=3D"MsoNormal" style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; =
font-family: SimSun;"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p>&nbsp;=
</o:p></span></p>=0A=
<div>=0A=
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">=0A=
<p class=3D"MsoNormal" style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; =
font-family: SimSun;"><b><span style=3D"font-size:11.0pt;font-family:&quot;=
Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;f=
ont-family:&quot;Calibri&quot;,sans-serif"> ippm [mailto:ippm-bounces@ietf.=
org]=0A=
<b>On Behalf Of </b>li_zhenqiang@hotmail.com<br>=0A=
<b>Sent:</b> Friday, August 7, 2020 8:44 AM<br>=0A=
<b>To:</b> ippm &lt;ippm@ietf.org&gt;<br>=0A=
<b>Subject:</b> [ippm] Welcome comment on Performance Measurement on LAG<o:=
p></o:p></span></p>=0A=
</div>=0A=
</div>=0A=
<p class=3D"MsoNormal" style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; =
font-family: SimSun;"><o:p>&nbsp;</o:p></p>=0A=
<div>=0A=
<p class=3D"MsoNormal" style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; =
font-family: SimSun;"><span style=3D"font-size:10.5pt;font-family:&quot;Mic=
rosoft YaHei&quot;,sans-serif;color:black">Hello All,<o:p></o:p></span></p>=
=0A=
</div>=0A=
<div>=0A=
<p class=3D"MsoNormal" style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; =
font-family: SimSun;"><span style=3D"font-size:10.5pt;font-family:&quot;Mic=
rosoft YaHei&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>=0A=
</div>=0A=
<div>=0A=
<p class=3D"MsoNormal" style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; =
font-family: SimSun;"><span style=3D"font-size:10.5pt;font-family:&quot;Mic=
rosoft YaHei&quot;,sans-serif;color:black">Performance Measurement on LAG,&=
nbsp;</span><a href=3D"https://www.ietf.org/internet-drafts/draft-li-ippm-p=
m-on-lag-00.txt" style=3D"color: blue; text-decoration: underline;"><span s=
tyle=3D"font-size:10.5pt;font-family:&quot;Microsoft YaHei&quot;,sans-serif=
">https://www.ietf.org/internet-drafts/draft-li-ippm-pm-on-lag-01.txt</span=
></a><span style=3D"font-size:10.5pt;font-family:&quot;Microsoft YaHei&quot=
;,sans-serif;color:black">,=0A=
 was not presented in the past virtual meeting due to limited time. This do=
c defines extensions to&nbsp;OWAMP, TWAMP and&nbsp;STAMP to implement&nbsp;=
performance measurement on every member link of a Link Aggregation&nbsp;Gro=
up (LAG). &nbsp;With the measured metrics of each member=0A=
 link of a&nbsp;LAG, it enables operators to enforce performance metric bas=
ed traffic&nbsp;steering policy among the member links.<o:p></o:p></span></=
p>=0A=
</div>=0A=
<div>=0A=
<p class=3D"MsoNormal" style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; =
font-family: SimSun;"><span style=3D"font-size:10.5pt;font-family:&quot;Mic=
rosoft YaHei&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>=0A=
</div>=0A=
<div>=0A=
<p class=3D"MsoNormal" style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; =
font-family: SimSun;"><span style=3D"font-size:10.5pt;font-family:&quot;Mic=
rosoft YaHei&quot;,sans-serif;color:black">The requirements come from field=
 networks, where&nbsp;the link delays of the member links of a LAG are&nbsp=
;different because the member links are over different=0A=
 transport&nbsp;paths. &nbsp;To provide low delay service to time sensitive=
 traffic, we&nbsp;have to know the link delay of each member link of a LAG =
and then&nbsp;steer traffic accordingly.<o:p></o:p></span></p>=0A=
</div>=0A=
<div>=0A=
<p class=3D"MsoNormal" style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; =
font-family: SimSun;"><span style=3D"font-size:10.5pt;font-family:&quot;Mic=
rosoft YaHei&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>=0A=
</div>=0A=
<div>=0A=
<p class=3D"MsoNormal" style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; =
font-family: SimSun;"><span style=3D"font-size:10.5pt;font-family:&quot;Mic=
rosoft YaHei&quot;,sans-serif;color:black">We appreciate all the comments a=
nd suggestions.<o:p></o:p></span></p>=0A=
</div>=0A=
<div>=0A=
<p class=3D"MsoNormal" style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; =
font-family: SimSun;"><span style=3D"font-size:10.5pt;font-family:&quot;Mic=
rosoft YaHei&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>=0A=
</div>=0A=
<div>=0A=
<p class=3D"MsoNormal" style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; =
font-family: SimSun;"><span style=3D"font-size:10.5pt;font-family:&quot;Mic=
rosoft YaHei&quot;,sans-serif;color:black">Best Regards,<o:p></o:p></span><=
/p>=0A=
</div>=0A=
<div>=0A=
<p class=3D"MsoNormal" style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; =
font-family: SimSun;"><span style=3D"font-size:10.5pt;font-family:&quot;Mic=
rosoft YaHei&quot;,sans-serif;color:black">Zhenqiang Li<o:p></o:p></span></=
p>=0A=
</div>=0A=
<div>=0A=
<div>=0A=
<div class=3D"MsoNormal" style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt=
; font-family: SimSun;"><span style=3D"font-size:10.5pt;font-family:&quot;M=
icrosoft YaHei&quot;,sans-serif;color:black">=0A=
<hr size=3D"2" width=3D"420" style=3D"width:157.5pt" noshade=3D"" align=3D"=
left">=0A=
</span></div>=0A=
</div>=0A=
</div>=0A=
<div>=0A=
<div style=3D"margin-left:7.5pt;margin-top:7.5pt;margin-right:7.5pt;margin-=
bottom:7.5pt">=0A=
<div>=0A=
<p class=3D"MsoNormal" style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; =
font-family: SimSun;"><a href=3D"mailto:li_zhenqiang@hotmail.com" style=3D"=
color: blue; text-decoration: underline;"><span style=3D"font-size:10.0pt;f=
ont-family:&quot;Verdana&quot;,sans-serif">li_zhenqiang@hotmail.com</span><=
/a><span style=3D"font-size:10.0pt;font-family:&quot;Verdana&quot;,sans-ser=
if;color:black"><o:p></o:p></span></p>=0A=
</div>=0A=
</div>=0A=
</div>=0A=
</div>=0A=
</div></div></blockquote>=0A=
</body></html>=

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Hi Ben,
thank you for your comments and suggestions, all are much appreciated.
Please find my notes in-lined below tagged by GIM>>. Attached are the diff
and the new working version of the draft.

Regards,
Greg

On Tue, Sep 1, 2020 at 8:55 PM Benjamin Kaduk via Datatracker <
noreply@ietf.org> wrote:

> Benjamin Kaduk has entered the following ballot position for
> draft-ietf-ippm-stamp-option-tlv-09: 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 this
> 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-ippm-stamp-option-tlv/
>
>
>
> ----------------------------------------------------------------------
> DISCUSS:
> ----------------------------------------------------------------------
>
> Thanks for all the updates; we've made good progress.
>
> I think we're still not converged on the DSCP handling, though.  I have
> a bit more exposition in the COMMENT section, but in short, my
> understanding is that we're setting up a session-reflector to incur
> unbounded levels of risk with hard protocol requirements.  I think we
> need to provide a way to bound that risk, for example by allowing the
> Session-Reflector to selectively choose to treat the CoS TLV as
> unimplemented (set the U flag in its reflected packet) or some other
> mechanism for local policy to filter what DSCP codepoints are set in
> reflected packets (ideally, indicating that the policy made a change).
>
GIM>> Thank you for pointing to the inter-QoS domain scenario. Clearly, it
must be handled with more caution. Using the U flag is a very interesting
approach. But wouldn't the Session-Sender skip the CoS TLV in the reflected
packet? As a result, we may not retrieve information about the CoS mapping
in the forward direction, i.e., towards the Session-Reflector. And it might
be difficult for an operator to recognize whether the Session-Reflector
doesn't support the particular CoS or STAMP extensions altogether. I would
propose a new field being added in the CoS TLV:

   -    RP (Reverse Path) - is a two-bit-long field.  A Session-Sender
      MUST set the value of the RP field to 0 on transmission.

And further in the section another update:
   A STAMP Session-Reflector that receives a test packet with the CoS
   TLV MUST include the CoS TLV in the reflected test packet.  Also, the
   Session-Reflector MUST copy the value of the DSCP and ECN fields of
   the IP header of the received STAMP test packet into the DSCP2 field
   in the reflected test packet.  Finally, the Session-Reflector MUST
   use the local policy to verify whether the CoS corresponding to the
   value of the DSCP1 field is permitted in the domain.  If it is, the
   Session-Reflectorset MUST set the DSCP field's value in the IP header
   of the reflected test packet equal to the value of the DSCP1 field of
   the received test packet.  Otherwise, the Session-Reflector MUST use
   the DSCP value of the received STAMP packet and set the value of the
   RP field to 1.  Upon receiving the reflected packet, if the value of
   the RP field is 0, the Session-Sender will save the DSCP and ECN
   values for analysis of the CoS in the reverse direction.  If the
   value of the RP field in the received reflected packet is 1, only CoS
   in the forward direction can be analyzed.

Would these updates address your concern?

>
> Also, there's a bit of fallout from the flags reworking that's left to
> cleanup in Section 4: we now have the Session-Sender set the U flag to
> 1, so this text no longer makes sense:
>
> % A STAMP system, i.e., either a Session-Sender or a Session-Reflector,
> % that has received a STAMP test packet with extension TLVs MUST
> % validate each TLV:
> %
> %    If the U flag is set, the STAMP system MUST skip the processing of
> %    the TLV.
>
> I think it should just apply to the Session-Sender for this case -- the
> Session-Reflector doesn't need to check the received U flag, since the
> Session-Sender will not be generating TLVs it does not understand.
> (Whether or not to keep the behavior for the M and I flags as applying
> to both Session-Sender and Session-Reflector vs. just Session-Sender
> does not immediately seem to be of much consequence.
>
GIM>> Thank you for catching this. Indeed, that brakes STAMP with
extensions. I think that though checking M and I flags of a
Session-Reflector should not do any harm, it doesn't seem to have any
benefits. Hence we may remove the Session-Reflector from the sentence and
the updated introduction to the flag processing reads like below:
   A STAMP Session-Sender that has received a reflected STAMP test
   packet with extension TLVs MUST validate each TLV:

>
>
> ----------------------------------------------------------------------
> COMMENT:
> ----------------------------------------------------------------------
>
> My most significant remaining comments are on the Security
> Considerations (Section 6):
>
> The security of the HMAC mechanism is not complete, since it is
> susceptible to replay attack.  As such, when HMAC is in use, it is
> important to check that the received sequence numbers are (at least
> mostly) monotonic and to detect replays.  While replayed packets do not
> always indicate an attack (depending on the network technology) they are
> still a noteworthy condition, and we should say something about whether
> we expect to produce a response to each received instance or to suppress
> replies to replayed input.
>
GIM>> Is there a reliable mechanism to distinguish between an out-of-order
duplicated packet and a replayed packet? I've checked RFC 5357 TWAMP for
any suggestion and believe that there is no special consideration by a
Session-Reflector for an out-of-order duplicated packet. The TWAMP
Session-Reflector does not monitor whether the sequence numbers of the
received test packets are in the monotonically increasing sequence. STAMP
is designed to be comparable with TWAMP and have some level of
interoperability. Hence, discarding what appears as a replayed packet at a
STAMP Session-Reflector might be less desirable behavior. If we follow
TWAMP's behavior, what else can be done at the Session-Reflector to
strengthen the security?

>
>    Monitoring and optional control of DSCP do not appear to introduce
>    any additional security threat to hosts that communicate with STAMP
>    as defined in [RFC8762].  As this specification defined the mechanism
>    to test DSCP mapping, this document inherits all the security
>
> I'm afraid I still don't understand the reasoning here.  In my
> understanding, the risk stems from the semantics of the DCSP field being
> (for at least some codepoints) site-local, there not being a guarantee
> that the session-sender and session-reflector are on the same network
> (and thus, using the same DSCP semantics), and the hard requirement for
> the Session-Reflector to set the DCSP value indicated by the
> Session-Sender.  A mechanism for a remote entity to induce generation of
> local packets with unspecified semantics is a risk that cannot be
> qualified at protocol-design time, since the possible outcomes are
> inherently unspecified.  This is analogous to the situation with
> undefined behavior in programming languages like C -- the programmer is
> flat-out required to avoid it, because literally anything could go wrong
> if undefined behavior is triggered.
>
GIM>> I agree that the inter-QoS domain case requires more consideration in
the Security section. I propose the updated text below:

   As this specification defined the mechanism to test DSCP mapping,
   this document inherits all the security considerations discussed in
   [RFC2474].  Monitoring and optional control of DSCP using the CoS TLV
   may be used across the Internet so that the Session-Sender and the
   Session-Reflector are located in domains that use different CoS
   profiles.  Thus, it is essential that an operator verifies the set of
   CoS values that are used in the Session-Reflector's domain.  Also, an
   implementation of a Session-Reflector SHOULD support a local policy
   to confirm whether the value sent by the Session-Sender can be used
   as the value of the DSCP field.  Section 4.4 defines the use of that
   local policy.



>
> This is especially risky when there is the possibility for the
> Session-Reflector to act on packets that do not have any form of
> authentication (i.e., could be spoofed from off-path).  But we do not
> mention this risk at all, let alone give guidance on its mitigation.
> (Discussion of the security considerations of unauthenticated operation
> would ideally be generalized to all actions/TLVs that have side effects,
> not just the specific case of setting the DSCP codepoint.)
>
GIM>> It seems very challenging for a STAMP system to differentiate between
a duplicate and/or out-of-order test packet and a replayed packet because
one of the metrics STAMP test measures is the network re-ordering metric
per RFC 4737 <https://tools.ietf.org/html/rfc4737>. We may recommend that
the rate-limiting of test packets be selected conservatively.

>
> Section 4.2
>
> I'd suggest saying that all fields that are not filled are transmitted
> with all bits set to zero.
>
GIM>> Thank you for the helpful suggestion. Appended Section 4.2:
   Note that all fields not filled by either a Session-Sender or
   Session-Reflector are transmitted with all bits set to zero.

>
> Section 4.2.1
>
>    o  Source MAC Address sub-TLV - is a 12-octet-long sub-TLV.  The Type
>       value is TBA9.  The value of the Length field MUST equal to 8.
>       The Value field is a 12-octet-long MBZ field that MUST be zeroed
>       on transmission and ignored on receipt.
>
> Value should be 8-octets-long, no?
>
GIM>> Thank you for catching it! You are absolutely correct. Fixed this and
a similar in:
   o  Source EUI-64 Address sub-TLV - is a 12-octet-long sub-TLV that
      includes the EUI-64 source MAC address.  The Type value is TBA11.
      The value of the Length field MUST equal to 8.  The Value field
      consists of an eight-octet-long EUI-64 field.



> Section 4.2.2
>
>    A Session-Sender MAY include the Source MAC Address sub-TLV is the
>    Location TLV.  If the Session-Reflector receives the Location TLV
>
> nit: s/is/in/
>
GIM>> Thank you. Fixed (and three more places in the same sub-section).

>
> Section 4.3
>
>    MUST NOT fill any information fields except for STAMP TLV Flags,
>    Type, and Length.  All other fields MUST be filled with zeroes The
>
> nit: missing full stop.
>
GIM>> Done.

--0000000000001bf0d305ae6dfb03
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<div dir=3D"ltr"><div dir=3D"ltr">Hi Ben,<div>thank you for your comments a=
nd suggestions, all are much appreciated. Please find my notes in-lined bel=
ow tagged=C2=A0by GIM&gt;&gt;. Attached are the diff and the new working ve=
rsion of the draft.</div><div><br></div><div>Regards,</div><div>Greg</div><=
/div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">O=
n Tue, Sep 1, 2020 at 8:55 PM Benjamin Kaduk via Datatracker &lt;<a href=3D=
"mailto:noreply@ietf.org">noreply@ietf.org</a>&gt; wrote:<br></div><blockqu=
ote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px=
 solid rgb(204,204,204);padding-left:1ex">Benjamin Kaduk has entered the fo=
llowing ballot position for<br>
draft-ietf-ippm-stamp-option-tlv-09: Discuss<br>
<br>
When responding, please keep the subject line intact and reply to all<br>
email addresses included in the To and CC lines. (Feel free to cut this<br>
introductory paragraph, however.)<br>
<br>
<br>
Please refer to <a href=3D"https://www.ietf.org/iesg/statement/discuss-crit=
eria.html" rel=3D"noreferrer" target=3D"_blank">https://www.ietf.org/iesg/s=
tatement/discuss-criteria.html</a><br>
for more information about IESG DISCUSS and COMMENT positions.<br>
<br>
<br>
The document, along with other ballot positions, can be found here:<br>
<a href=3D"https://datatracker.ietf.org/doc/draft-ietf-ippm-stamp-option-tl=
v/" rel=3D"noreferrer" target=3D"_blank">https://datatracker.ietf.org/doc/d=
raft-ietf-ippm-stamp-option-tlv/</a><br>
<br>
<br>
<br>
----------------------------------------------------------------------<br>
DISCUSS:<br>
----------------------------------------------------------------------<br>
<br>
Thanks for all the updates; we&#39;ve made good progress.<br>
<br>
I think we&#39;re still not converged on the DSCP handling, though.=C2=A0 I=
 have<br>
a bit more exposition in the COMMENT section, but in short, my<br>
understanding is that we&#39;re setting up a session-reflector to incur<br>
unbounded levels of risk with hard protocol requirements.=C2=A0 I think we<=
br>
need to provide a way to bound that risk, for example by allowing the<br>
Session-Reflector to selectively choose to treat the CoS TLV as<br>
unimplemented (set the U flag in its reflected packet) or some other<br>
mechanism for local policy to filter what DSCP codepoints are set in<br>
reflected packets (ideally, indicating that the policy made a change).<br><=
/blockquote><div>GIM&gt;&gt; Thank you for pointing to the inter-QoS domain=
 scenario. Clearly, it must be handled=C2=A0with more caution. Using the U =
flag is a very interesting approach. But wouldn&#39;t the Session-Sender sk=
ip the CoS TLV in the reflected packet? As a result, we may not retrieve in=
formation about the CoS mapping in the forward direction, i.e., towards the=
 Session-Reflector. And it might be difficult for an operator to recognize =
whether the Session-Reflector doesn&#39;t support the particular CoS or STA=
MP extensions altogether. I would propose a new field being added in the Co=
S TLV:=C2=A0</div><div><ul><li>=C2=A0 =C2=A0RP (Reverse Path) - is a two-bi=
t-long field.=C2=A0 A Session-Sender<br>=C2=A0 =C2=A0MUST set the value of =
the RP field to 0 on transmission.<br></li></ul>And further in the section =
another update:</div><div>=C2=A0 =C2=A0A STAMP Session-Reflector that recei=
ves a test packet with the CoS<br>=C2=A0 =C2=A0TLV MUST include the CoS TLV=
 in the reflected test packet.=C2=A0 Also, the<br>=C2=A0 =C2=A0Session-Refl=
ector MUST copy the value of the DSCP and ECN fields of<br>=C2=A0 =C2=A0the=
 IP header of the received STAMP test packet into the DSCP2 field<br>=C2=A0=
 =C2=A0in the reflected test packet.=C2=A0 Finally, the Session-Reflector M=
UST<br>=C2=A0 =C2=A0use the local policy to verify whether the CoS correspo=
nding to the<br>=C2=A0 =C2=A0value of the DSCP1 field is permitted in the d=
omain.=C2=A0 If it is, the<br>=C2=A0 =C2=A0Session-Reflectorset MUST set th=
e DSCP field&#39;s value in the IP header<br>=C2=A0 =C2=A0of the reflected =
test packet equal to the value of the DSCP1 field of<br>=C2=A0 =C2=A0the re=
ceived test packet.=C2=A0 Otherwise, the Session-Reflector MUST use<br>=C2=
=A0 =C2=A0the DSCP value of the received STAMP packet and set the value of =
the<br>=C2=A0 =C2=A0RP field to 1.=C2=A0 Upon receiving the reflected packe=
t, if the value of<br>=C2=A0 =C2=A0the RP field is 0, the Session-Sender wi=
ll save the DSCP and ECN<br>=C2=A0 =C2=A0values for analysis of the CoS in =
the reverse direction.=C2=A0 If the<br>=C2=A0 =C2=A0value of the RP field i=
n the received reflected packet is 1, only CoS<br>=C2=A0 =C2=A0in the forwa=
rd direction can be analyzed.<br></div><div><br></div><div>Would these upda=
tes address your concern?</div><blockquote class=3D"gmail_quote" style=3D"m=
argin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left=
:1ex">
<br>
Also, there&#39;s a bit of fallout from the flags reworking that&#39;s left=
 to<br>
cleanup in Section 4: we now have the Session-Sender set the U flag to<br>
1, so this text no longer makes sense:<br>
<br>
% A STAMP system, i.e., either a Session-Sender or a Session-Reflector,<br>
% that has received a STAMP test packet with extension TLVs MUST<br>
% validate each TLV:<br>
%<br>
%=C2=A0 =C2=A0 If the U flag is set, the STAMP system MUST skip the process=
ing of<br>
%=C2=A0 =C2=A0 the TLV.<br>
<br>
I think it should just apply to the Session-Sender for this case -- the<br>
Session-Reflector doesn&#39;t need to check the received U flag, since the<=
br>
Session-Sender will not be generating TLVs it does not understand.<br>
(Whether or not to keep the behavior for the M and I flags as applying<br>
to both Session-Sender and Session-Reflector vs. just Session-Sender<br>
does not immediately seem to be of much consequence.<br></blockquote><div>G=
IM&gt;&gt; Thank you for catching this. Indeed, that brakes STAMP with exte=
nsions. I think that though checking M and I flags of a Session-Reflector s=
hould not do any harm, it doesn&#39;t seem to have any benefits. Hence we m=
ay remove the Session-Reflector from the sentence and the updated introduct=
ion to the flag processing reads like below:</div><div>=C2=A0 =C2=A0A STAMP=
 Session-Sender that has received a reflected STAMP test<br>=C2=A0 =C2=A0pa=
cket with extension TLVs MUST validate each TLV:<br></div><blockquote class=
=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rg=
b(204,204,204);padding-left:1ex">
<br>
<br>
----------------------------------------------------------------------<br>
COMMENT:<br>
----------------------------------------------------------------------<br>
<br>
My most significant remaining comments are on the Security<br>
Considerations (Section 6):<br>
<br>
The security of the HMAC mechanism is not complete, since it is<br>
susceptible to replay attack.=C2=A0 As such, when HMAC is in use, it is<br>
important to check that the received sequence numbers are (at least<br>
mostly) monotonic and to detect replays.=C2=A0 While replayed packets do no=
t<br>
always indicate an attack (depending on the network technology) they are<br=
>
still a noteworthy condition, and we should say something about whether<br>
we expect to produce a response to each received instance or to suppress<br=
>
replies to replayed input.<br></blockquote><div>GIM&gt;&gt; Is there a reli=
able mechanism to distinguish between an out-of-order duplicated packet and=
 a replayed packet? I&#39;ve checked RFC 5357 TWAMP for any suggestion and =
believe that there is no special consideration by a Session-Reflector for a=
n out-of-order duplicated packet. The TWAMP Session-Reflector does not moni=
tor whether the sequence numbers of the received test packets are in the mo=
notonically increasing sequence. STAMP is designed to be comparable with TW=
AMP and have some level of interoperability. Hence, discarding what appears=
 as a replayed packet at a STAMP Session-Reflector might be less desirable =
behavior. If we follow TWAMP&#39;s=C2=A0behavior, what else can be done at =
the Session-Reflector to strengthen the security?</div><blockquote class=3D=
"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(2=
04,204,204);padding-left:1ex">
<br>
=C2=A0 =C2=A0Monitoring and optional control of DSCP do not appear to intro=
duce<br>
=C2=A0 =C2=A0any additional security threat to hosts that communicate with =
STAMP<br>
=C2=A0 =C2=A0as defined in [RFC8762].=C2=A0 As this specification defined t=
he mechanism<br>
=C2=A0 =C2=A0to test DSCP mapping, this document inherits all the security<=
br>
<br>
I&#39;m afraid I still don&#39;t understand the reasoning here.=C2=A0 In my=
<br>
understanding, the risk stems from the semantics of the DCSP field being<br=
>
(for at least some codepoints) site-local, there not being a guarantee<br>
that the session-sender and session-reflector are on the same network<br>
(and thus, using the same DSCP semantics), and the hard requirement for<br>
the Session-Reflector to set the DCSP value indicated by the<br>
Session-Sender.=C2=A0 A mechanism for a remote entity to induce generation =
of<br>
local packets with unspecified semantics is a risk that cannot be<br>
qualified at protocol-design time, since the possible outcomes are<br>
inherently unspecified.=C2=A0 This is analogous to the situation with<br>
undefined behavior in programming languages like C -- the programmer is<br>
flat-out required to avoid it, because literally anything could go wrong<br=
>
if undefined behavior is triggered.<br></blockquote><div>GIM&gt;&gt; I agre=
e that the inter-QoS domain case requires more consideration in the Securit=
y section. I propose the updated text below:</div><div><br></div><div>=C2=
=A0 =C2=A0As this specification defined the mechanism to test DSCP mapping,=
<br>=C2=A0 =C2=A0this document inherits all the security considerations dis=
cussed in<br>=C2=A0 =C2=A0[RFC2474].=C2=A0 Monitoring and optional control =
of DSCP using the CoS TLV<br>=C2=A0 =C2=A0may be used across the Internet s=
o that the Session-Sender and the<br>=C2=A0 =C2=A0Session-Reflector are loc=
ated in domains that use different CoS<br>=C2=A0 =C2=A0profiles.=C2=A0 Thus=
, it is essential that an operator verifies the set of<br>=C2=A0 =C2=A0CoS =
values that are used in the Session-Reflector&#39;s domain.=C2=A0 Also, an<=
br>=C2=A0 =C2=A0implementation of a Session-Reflector SHOULD support a loca=
l policy<br>=C2=A0 =C2=A0to confirm whether the value sent by the Session-S=
ender can be used<br>=C2=A0 =C2=A0as the value of the DSCP field.=C2=A0 Sec=
tion 4.4 defines the use of that<br>=C2=A0 =C2=A0local policy.<br></div></d=
iv><div class=3D"gmail_quote"><br><div>=C2=A0</div><blockquote class=3D"gma=
il_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,2=
04,204);padding-left:1ex">
<br>
This is especially risky when there is the possibility for the<br>
Session-Reflector to act on packets that do not have any form of<br>
authentication (i.e., could be spoofed from off-path).=C2=A0 But we do not<=
br>
mention this risk at all, let alone give guidance on its mitigation.<br>
(Discussion of the security considerations of unauthenticated operation<br>
would ideally be generalized to all actions/TLVs that have side effects,<br=
>
not just the specific case of setting the DSCP codepoint.)<br></blockquote>=
<div>GIM&gt;&gt; It seems very challenging for a STAMP system to differenti=
ate between a duplicate and/or out-of-order test packet and a replayed pack=
et because one of the metrics STAMP test measures is the network re-orderin=
g metric per <a href=3D"https://tools.ietf.org/html/rfc4737">RFC 4737</a>. =
We may recommend that the rate-limiting of test packets be selected conserv=
atively.=C2=A0</div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0=
px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<br>
Section 4.2<br>
<br>
I&#39;d suggest saying that all fields that are not filled are transmitted<=
br>
with all bits set to zero.<br></blockquote><div>GIM&gt;&gt; Thank you for t=
he helpful suggestion. Appended Section 4.2:</div><div>=C2=A0 =C2=A0Note th=
at all fields not filled by either a Session-Sender or<br>=C2=A0 =C2=A0Sess=
ion-Reflector are transmitted with all bits set to zero.<br></div><blockquo=
te class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px =
solid rgb(204,204,204);padding-left:1ex">
<br>
Section 4.2.1<br>
<br>
=C2=A0 =C2=A0o=C2=A0 Source MAC Address sub-TLV - is a 12-octet-long sub-TL=
V.=C2=A0 The Type<br>
=C2=A0 =C2=A0 =C2=A0 value is TBA9.=C2=A0 The value of the Length field MUS=
T equal to 8.<br>
=C2=A0 =C2=A0 =C2=A0 The Value field is a 12-octet-long MBZ field that MUST=
 be zeroed<br>
=C2=A0 =C2=A0 =C2=A0 on transmission and ignored on receipt.<br>
<br>
Value should be 8-octets-long, no?<br></blockquote><div>GIM&gt;&gt; Thank y=
ou for catching it! You are absolutely correct. Fixed this and a similar in=
:</div><div>=C2=A0 =C2=A0o =C2=A0Source EUI-64 Address sub-TLV - is a 12-oc=
tet-long sub-TLV that<br>=C2=A0 =C2=A0 =C2=A0 includes the EUI-64 source MA=
C address.=C2=A0 The Type value is TBA11.<br>=C2=A0 =C2=A0 =C2=A0 The value=
 of the Length field MUST equal to 8.=C2=A0 The Value field<br>=C2=A0 =C2=
=A0 =C2=A0 consists of an eight-octet-long EUI-64 field.<br><br></div><div>=
<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8=
ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<br>
Section 4.2.2<br>
<br>
=C2=A0 =C2=A0A Session-Sender MAY include the Source MAC Address sub-TLV is=
 the<br>
=C2=A0 =C2=A0Location TLV.=C2=A0 If the Session-Reflector receives the Loca=
tion TLV<br>
<br>
nit: s/is/in/<br></blockquote><div>GIM&gt;&gt; Thank you. Fixed (and three =
more places in the same sub-section).=C2=A0</div><blockquote class=3D"gmail=
_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204=
,204);padding-left:1ex">
<br>
Section 4.3<br>
<br>
=C2=A0 =C2=A0MUST NOT fill any information fields except for STAMP TLV Flag=
s,<br>
=C2=A0 =C2=A0Type, and Length.=C2=A0 All other fields MUST be filled with z=
eroes The<br>
<br>
nit: missing full stop.<br></blockquote><div>GIM&gt;&gt; Done.=C2=A0</div><=
/div></div>

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From: "li_zhenqiang@hotmail.com" <li_zhenqiang@hotmail.com>
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Subject: Re: [ippm] Welcome comment on Performance Measurement on LAG
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Y29tbWVudHMgYW5kIHN1Z2dlc3Rpb25zLg0KDQpCZXN0IFJlZ2FyZHMsDQpaaGVucWlhbmcgTGkN
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Content-Type: text/html;
	charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<html><head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Dutf-8"><s=
tyle>body { line-height: 1.5; }blockquote { margin-top: 0px; margin-bottom:=
 0px; margin-left: 0.5em; }p { margin-top: 0px; margin-bottom: 0px; }div.Fo=
xDiv20200905114449671092 { }body { font-size: 10.5pt; font-family: =E5=BE=
=AE=E8=BD=AF=E9=9B=85=E9=BB=91; color: rgb(0, 0, 0); line-height: 1.5; }</s=
tyle></head><body>=0A=
<div><span></span>Hello Wenying and all,</div><div><br></div><div>Thank you=
 for your comment. We'll try our best to move it forward quickly and hope t=
he proposed method could be used in the field network early.</div>=0A=
<div><br></div><div>Good news to announce for all, one of our vendors has a=
lready implemented the proposed method and the demo result is awsome.</div>=
<div><br></div><div>Best Regards,</div><div>Zhenqiang Li</div><hr style=3D"=
width: 210px; height: 1px;" color=3D"#b5c4df" size=3D"1" align=3D"left">=0A=
<div><span><div style=3D"MARGIN: 10px; FONT-FAMILY: verdana; FONT-SIZE: 10p=
t"><div>li_zhenqiang@hotmail.com</div></div></span></div>=0A=
<blockquote style=3D"margin-Top: 0px; margin-Bottom: 0px; margin-Left: 0.5e=
m"><div>&nbsp;</div><div style=3D"border:none;border-top:solid #B5C4DF 1.0p=
t;padding:3.0pt 0cm 0cm 0cm"><div style=3D"PADDING-RIGHT: 8px; PADDING-LEFT=
: 8px; FONT-SIZE: 12px;FONT-FAMILY:tahoma;COLOR:#000000; BACKGROUND: #efefe=
f; PADDING-BOTTOM: 8px; PADDING-TOP: 8px"><div><b>From:</b>&nbsp;<a href=3D=
"mailto:jiangwenying@chinamobile.com">=E5=A7=9C=E6=96=87=E9=A2=96</a></div>=
<div><b>Date:</b>&nbsp;2020-09-03&nbsp;12:01</div><div><b>To:</b>&nbsp;<a h=
ref=3D"mailto:ippm-bounces@ietf.org">ippm-bounces</a></div><div><b>CC:</b>&=
nbsp;<a href=3D"mailto:li_zhenqiang@hotmail.com">li_zhenqiang</a></div><div=
><b>Subject:</b>&nbsp;Re: [ippm] Welcome comment on Performance Measurement=
 on LAG</div></div></div><div><div class=3D"FoxDiv20200905114449671092"><p>=
<span style=3D"color: #000000; font-size: 16px;">Hi all=EF=BC=8C</span></p>=
<p><span style=3D"color: #000000; font-size: 16px;"><br></span></p><p><span=
 style=3D"color: #000000; font-size: 16px;">I think the performance measure=
ment of&nbsp;TRUNK member link is very useful for the&nbsp;carrier&nbsp;net=
works. And&nbsp;&nbsp;I w<span style=3D"color: #000000; font-family: Calibr=
i , sans-serif; font-size: 16px;">ould like to see this document move forwa=
rd.</span></span></p><p><span style=3D"color: #000000; font-family: Calibri=
 , sans-serif; font-size: 16px;"><br></span></p><div id=3D"divsignature"><p=
><span style=3D"color: #000000; font-family: =E5=8D=8E=E6=96=87=E7=BB=86=E9=
=BB=91; font-size: 16px;"></span></p><p style=3D"margin: 0px 0px 1px; font-=
family: SimSun; font-size: medium;"><span style=3D"color: #000000; font-fam=
ily: Calibri , sans-serif; font-size: 16px;">Best regards,</span></p><p sty=
le=3D"margin: 0px 0px 1px; font-family: SimSun; font-size: medium;"><span s=
tyle=3D"color: #000000; font-family: Calibri , sans-serif; font-size: 16px;=
">Wenying</span></p><p>&nbsp;</p></div><blockquote id=3D"oriMsgHtmlSeperato=
r" style=3D"margin: 0px 0px 0px 0.8ex;"><blockquote style=3D"margin-top: 0p=
x; margin-bottom: 0px; margin-left: 0.5em;"><div>&nbsp;</div><div style=3D"=
border-width: 1pt medium medium; border-style: solid none none; border-colo=
r: rgb(181, 196, 223) currentColor currentColor; padding: 3pt 0cm 0cm; bord=
er-image: none;"><div style=3D"background: rgb(239, 239, 239); padding: 8px=
; color: rgb(0, 0, 0); font-family: tahoma; font-size: 12px;"><div><strong>=
=E5=8F=91=E4=BB=B6=E4=BA=BA=EF=BC=9A</strong>&nbsp;<a href=3D"mailto:li_zhe=
nqiang@hotmail.com">li_zhenqiang@hotmail.com</a></div><div><strong>=E5=8F=
=91=E9=80=81=E6=97=B6=E9=97=B4=EF=BC=9A</strong>&nbsp;2020-08-07&nbsp;14:43=
</div><div><strong>=E6=94=B6=E4=BB=B6=E4=BA=BA=EF=BC=9A</strong>&nbsp;<a hr=
ef=3D"mailto:ippm@ietf.org">ippm</a></div><div><strong>=E4=B8=BB=E9=A2=98=
=EF=BC=9A</strong>&nbsp;[ippm] Welcome comment on Performance Measurement o=
n LAG</div></div></div><div><div class=3D"FoxDiv20200810151350232625"><div>=
Hello All,</div><div><br></div><div>Performance Measurement on LAG,&nbsp;<a=
 style=3D"line-height: normal; font-family: =E5=BE=AE=E8=BD=AF=E9=9B=85=E9=
=BB=91 , Tahoma; font-size: 10.5pt; text-decoration: none; background-color=
: transparent;" href=3D"https://www.ietf.org/internet-drafts/draft-li-ippm-=
pm-on-lag-00.txt">https://www.ietf.org/internet-drafts/draft-li-ippm-pm-on-=
lag-01.txt</a>, was not presented in the past virtual meeting due to limite=
d time. T<span style=3D"line-height: 1.5; font-size: 10.5pt; background-col=
or: transparent;">his doc defines extensions to&nbsp;OWAMP, TWAMP and&nbsp;=
STAMP to implement&nbsp;performance measurement on every member link of a L=
ink Aggregation</span><span style=3D"font-size: 10.5pt; background-color: t=
ransparent;">&nbsp;Group (LAG). &nbsp;With the measured metrics of each mem=
ber link of a</span><span style=3D"line-height: 1.5; font-size: 10.5pt; bac=
kground-color: transparent;">&nbsp;LAG, it enables operators to enforce per=
formance metric based traffic&nbsp;steering policy among the member links.<=
/span></div><div><span style=3D"line-height: 1.5; font-size: 10.5pt; backgr=
ound-color: transparent;"><br></span></div><div><span style=3D"line-height:=
 1.5; font-size: 10.5pt; background-color: transparent;">The requirements c=
ome from field networks, where&nbsp;</span><span style=3D"background-color:=
 transparent;">the link delays of the member links of a LAG are</span><span=
 style=3D"line-height: 1.5; font-size: 10.5pt; background-color: transparen=
t;">&nbsp;different because the member links are over different transport&n=
bsp;paths. &nbsp;To provide low delay service to time sensitive traffic, we=
&nbsp;have to know the link delay of each member link of a LAG and then&nbs=
p;steer traffic accordingly.</span></div><div><br></div><div>We appreciate =
all the comments and suggestions.</div><div><br></div><div>Best Regards,</d=
iv><div>Zhenqiang Li</div><hr align=3D"left" style=3D"width: 210px; height:=
 1px;"><div><div style=3D"margin: 10px; font-family: verdana; font-size: 10=
pt;"><div>li_zhenqiang@hotmail.com</div></div></div></div></div></blockquot=
e></blockquote><!-- endblock name=3D"headerinfo" --><p>&nbsp;</p></div></di=
v></blockquote>=0A=
</body></html>=

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Thread-Topic: [ippm] WGLC for draft-ietf-ippm-capacity-metric-method
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From: "MORTON, ALFRED C (AL)" <acm@research.att.com>
To: Joachim Fabini <joachim.fabini@tuwien.ac.at>, Tommy Pauly <tpauly=40apple.com@dmarc.ietf.org>, "IETF IPPM WG (ippm@ietf.org)" <ippm@ietf.org>
Thread-Topic: [ippm] WGLC for draft-ietf-ippm-capacity-metric-method
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Date: Sat, 5 Sep 2020 15:32:25 +0000
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Subject: Re: [ippm] WGLC for draft-ietf-ippm-capacity-metric-method
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From: "MORTON, ALFRED C (AL)" <acm@research.att.com>
To: "Frank Brockners (fbrockne)" <fbrockne@cisco.com>, Tommy Pauly <tpauly@apple.com>, "IETF IPPM WG (ippm@ietf.org)" <ippm@ietf.org>
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Thread-Topic: [ippm] WGLC for draft-ietf-ippm-capacity-metric-method
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Subject: Re: [ippm] WGLC for draft-ietf-ippm-capacity-metric-method
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Return-Path: <acm@research.att.com>
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From: "MORTON, ALFRED C (AL)" <acm@research.att.com>
To: Greg Mirsky <gregimirsky@gmail.com>, Tommy Pauly <tpauly=40apple.com@dmarc.ietf.org>
CC: "IETF IPPM WG (ippm@ietf.org)" <ippm@ietf.org>
Thread-Topic: [ippm] WGLC for draft-ietf-ippm-capacity-metric-method
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Date: Sat, 5 Sep 2020 19:14:35 +0000
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Subject: Re: [ippm] WGLC for draft-ietf-ippm-capacity-metric-method
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From: "MORTON, ALFRED C (AL)" <acm@research.att.com>
To: "Frank Brockners (fbrockne)" <fbrockne@cisco.com>, Tommy Pauly <tpauly@apple.com>, "IETF IPPM WG (ippm@ietf.org)" <ippm@ietf.org>
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Thread-Topic: [ippm] WGLC for draft-ietf-ippm-capacity-metric-method
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--_000_4D7F4AD313D3FC43A053B309F97543CF0140BD494Enjmtexg5resea_--


From nobody Thu Sep 10 06:25:45 2020
Return-Path: <session-request@ietf.org>
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Subject: [ippm] ippm - New Meeting Session Request for IETF 109
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A new meeting session request has just been submitted by Tommy Pauly, a Chair of the ippm working group.


---------------------------------------------------------
Working Group Name: IP Performance Measurement
Area Name: Transport Area
Session Requester: Tommy Pauly


Number of Sessions: 1
Length of Session(s):  2 Hours
Number of Attendees: 40
Conflicts to Avoid: 
 Chair Conflict: quic httpbis taps add
 Technology Overlap: tcpm 6man spring
 Key Participant Conflict: bmwg





People who must be present:
  Alfred Channon Morton
  Martin Duke
  Frank Brockners
  Greg Mirsky
  Tommy Pauly
  Ian Swett

Resources Requested:

Special Requests:
  
---------------------------------------------------------



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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 IP Performance Measurement WG of the IETF.

        Title           : Metrics and Methods for One-way IP Capacity
        Authors         : Al Morton
                          Ruediger Geib
                          Len Ciavattone
	Filename        : draft-ietf-ippm-capacity-metric-method-04.txt
	Pages           : 24
	Date            : 2020-09-10

Abstract:
   This memo revisits the problem of Network Capacity metrics first
   examined in RFC 5136.  The memo specifies a more practical Maximum
   IP-layer Capacity metric definition catering for measurement
   purposes, and outlines the corresponding methods of measurement.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-ippm-capacity-metric-method/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-ippm-capacity-metric-method-04
https://datatracker.ietf.org/doc/html/draft-ietf-ippm-capacity-metric-method-04

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-ippm-capacity-metric-method-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/



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From: "MORTON, ALFRED C (AL)" <acm@research.att.com>
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Thread-Topic: I-D Action: draft-ietf-ippm-capacity-metric-method-04.txt
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IPPM,

After addressing to the WGLC comments and allowing the replies to sit for s=
everal days, we have submitted the next version (04) with all changes incor=
porated.

regards,
Al, R=FCdiger, and Len

> -----Original Message-----
> From: I-D-Announce [mailto:i-d-announce-bounces@ietf.org] On Behalf Of
> internet-drafts@ietf.org
> Sent: Thursday, September 10, 2020 11:53 AM
> To: i-d-announce@ietf.org
> Cc: ippm@ietf.org
> Subject: I-D Action: draft-ietf-ippm-capacity-metric-method-04.txt
>=20
>=20
> A New Internet-Draft is available from the on-line Internet-Drafts
> directories.
> This draft is a work item of the IP Performance Measurement WG of the
> IETF.
>=20
>         Title           : Metrics and Methods for One-way IP Capacity
>         Authors         : Al Morton
>                           Ruediger Geib
>                           Len Ciavattone
> 	Filename        : draft-ietf-ippm-capacity-metric-method-04.txt
> 	Pages           : 24
> 	Date            : 2020-09-10
>=20
> Abstract:
>    This memo revisits the problem of Network Capacity metrics first
>    examined in RFC 5136.  The memo specifies a more practical Maximum
>    IP-layer Capacity metric definition catering for measurement
>    purposes, and outlines the corresponding methods of measurement.
>=20
>=20
> The IETF datatracker status page for this draft is:
> https://urldefense.proofpoint.com/v2/url?u=3Dhttps-
> 3A__datatracker.ietf.org_doc_draft-2Dietf-2Dippm-2Dcapacity-2Dmetric-
> 2Dmethod_&d=3DDwICAg&c=3DLFYZ-
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>=20
> There are also htmlized versions available at:
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> 3A__tools.ietf.org_html_draft-2Dietf-2Dippm-2Dcapacity-2Dmetric-2Dmethod-
> 2D04&d=3DDwICAg&c=3DLFYZ-
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>=20
> A diff from the previous version is available at:
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ff-
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>=20
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From nobody Thu Sep 10 09:48:36 2020
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Thanks Al for the new draft.


_______________________________________________________________

Dr. Ing. Jos=C3=A9 Ignacio Alvarez-Hamelin
CONICET and Facultad de Ingenier=C3=ADa, Universidad de Buenos Aires
Av. Paseo Col=C3=B3n 850 - C1063ACV - Buenos Aires - Argentina
+54 (11) 5285 0716 / 5285 0705
e-mail: ihameli@cnet.fi.uba.ar
web: http://cnet.fi.uba.ar/ignacio.alvarez-hamelin/
_______________________________________________________________



> On 10 Sep 2020, at 13:00, MORTON, ALFRED C (AL) <acm@research.att.com> =
wrote:
>=20
> IPPM,
>=20
> After addressing to the WGLC comments and allowing the replies to sit =
for several days, we have submitted the next version (04) with all =
changes incorporated.
>=20
> regards,
> Al, R=C3=BCdiger, and Len
>=20
>> -----Original Message-----
>> From: I-D-Announce [mailto:i-d-announce-bounces@ietf.org] On Behalf =
Of
>> internet-drafts@ietf.org
>> Sent: Thursday, September 10, 2020 11:53 AM
>> To: i-d-announce@ietf.org
>> Cc: ippm@ietf.org
>> Subject: I-D Action: draft-ietf-ippm-capacity-metric-method-04.txt
>>=20
>>=20
>> A New Internet-Draft is available from the on-line Internet-Drafts
>> directories.
>> This draft is a work item of the IP Performance Measurement WG of the
>> IETF.
>>=20
>>        Title           : Metrics and Methods for One-way IP Capacity
>>        Authors         : Al Morton
>>                          Ruediger Geib
>>                          Len Ciavattone
>> 	Filename        : draft-ietf-ippm-capacity-metric-method-04.txt
>> 	Pages           : 24
>> 	Date            : 2020-09-10
>>=20
>> Abstract:
>>   This memo revisits the problem of Network Capacity metrics first
>>   examined in RFC 5136.  The memo specifies a more practical Maximum
>>   IP-layer Capacity metric definition catering for measurement
>>   purposes, and outlines the corresponding methods of measurement.
>>=20
>>=20
>> The IETF datatracker status page for this draft is:
>> https://urldefense.proofpoint.com/v2/url?u=3Dhttps-
>> 3A__datatracker.ietf.org_doc_draft-2Dietf-2Dippm-2Dcapacity-2Dmetric-
>> 2Dmethod_&d=3DDwICAg&c=3DLFYZ-
>> =
o9_HUMeMTSQicvjIg&r=3DOfsSu8kTIltVyD1oL72cBw&m=3D4LwLyi33ZJhVS4XJehyNi4s94=
j5GN
>> 01-_KIHwicwRk8&s=3DXiYp-yATikwtUyAUl0qa3CmmQrKZid5S2yAqdMKRx7g&e=3D
>>=20
>> There are also htmlized versions available at:
>> https://urldefense.proofpoint.com/v2/url?u=3Dhttps-
>> =
3A__tools.ietf.org_html_draft-2Dietf-2Dippm-2Dcapacity-2Dmetric-2Dmethod-
>> 2D04&d=3DDwICAg&c=3DLFYZ-
>> =
o9_HUMeMTSQicvjIg&r=3DOfsSu8kTIltVyD1oL72cBw&m=3D4LwLyi33ZJhVS4XJehyNi4s94=
j5GN
>> 01-_KIHwicwRk8&s=3DPWzJA6yMqQuxLI_aRlvGuG-AFW1RPSvU6bw1704q56k&e=3D
>> https://urldefense.proofpoint.com/v2/url?u=3Dhttps-
>> =
3A__datatracker.ietf.org_doc_html_draft-2Dietf-2Dippm-2Dcapacity-2Dmetric-=

>> 2Dmethod-2D04&d=3DDwICAg&c=3DLFYZ-
>> =
o9_HUMeMTSQicvjIg&r=3DOfsSu8kTIltVyD1oL72cBw&m=3D4LwLyi33ZJhVS4XJehyNi4s94=
j5GN
>> 01-_KIHwicwRk8&s=3DGzUmogZZDUkzuQvtegtqvQydNofGdEE44aMFzT3puNg&e=3D
>>=20
>> A diff from the previous version is available at:
>> =
https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__www.ietf.org_rfcdif=
f-
>> 3Furl2-3Ddraft-2Dietf-2Dippm-2Dcapacity-2Dmetric-2Dmethod-
>> 2D04&d=3DDwICAg&c=3DLFYZ-
>> =
o9_HUMeMTSQicvjIg&r=3DOfsSu8kTIltVyD1oL72cBw&m=3D4LwLyi33ZJhVS4XJehyNi4s94=
j5GN
>> 01-_KIHwicwRk8&s=3DrphZil_QtyBbze2wRpKRtBuPxttKpjvoJvRH-Nr64Sg&e=3D
>>=20
>>=20
>> 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.
>>=20
>> Internet-Drafts are also available by anonymous FTP at:
>> =
https://urldefense.proofpoint.com/v2/url?u=3Dftp-3A__ftp.ietf.org_internet=
-
>> 2Ddrafts_&d=3DDwICAg&c=3DLFYZ-
>> =
o9_HUMeMTSQicvjIg&r=3DOfsSu8kTIltVyD1oL72cBw&m=3D4LwLyi33ZJhVS4XJehyNi4s94=
j5GN
>> 01-_KIHwicwRk8&s=3DgWFcTirHD8evQNugrVSjG_jEz0iHu7_p5lqK8h6_bDY&e=3D
>>=20
>>=20
>> _______________________________________________
>> I-D-Announce mailing list
>> I-D-Announce@ietf.org
>> https://urldefense.proofpoint.com/v2/url?u=3Dhttps-
>> 3A__www.ietf.org_mailman_listinfo_i-2Dd-2Dannounce&d=3DDwICAg&c=3DLFYZ-=

>> =
o9_HUMeMTSQicvjIg&r=3DOfsSu8kTIltVyD1oL72cBw&m=3D4LwLyi33ZJhVS4XJehyNi4s94=
j5GN
>> 01-_KIHwicwRk8&s=3DXpD8fURY_mB2CsmWq07ZvOX7pOdlKiJgoBqn2bS4mUc&e=3D
>> Internet-Draft directories:
>> https://urldefense.proofpoint.com/v2/url?u=3Dhttp-
>> 3A__www.ietf.org_shadow.html&d=3DDwICAg&c=3DLFYZ-
>> =
o9_HUMeMTSQicvjIg&r=3DOfsSu8kTIltVyD1oL72cBw&m=3D4LwLyi33ZJhVS4XJehyNi4s94=
j5GN
>> 01-_KIHwicwRk8&s=3DXMmjpLh26hhkpggvJyB1lMUuvR2T0YcuzdjjKff3Emw&e=3D
>> or https://urldefense.proofpoint.com/v2/url?u=3Dftp-
>> 3A__ftp.ietf.org_ietf_1shadow-2Dsites.txt&d=3DDwICAg&c=3DLFYZ-
>> =
o9_HUMeMTSQicvjIg&r=3DOfsSu8kTIltVyD1oL72cBw&m=3D4LwLyi33ZJhVS4XJehyNi4s94=
j5GN
>> 01-_KIHwicwRk8&s=3DeB1frkKiTgjMKeihFPeUv33Gjh24-xg5OpiSALZpds4&e=3D
>=20
> _______________________________________________
> ippm mailing list
> ippm@ietf.org
> https://www.ietf.org/mailman/listinfo/ippm


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From: Greg Mirsky <gregimirsky@gmail.com>
Date: Fri, 11 Sep 2020 11:40:26 -0700
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To: "MORTON, ALFRED C (AL)" <acm@research.att.com>
Cc: Tommy Pauly <tpauly=40apple.com@dmarc.ietf.org>,  "IETF IPPM WG (ippm@ietf.org)" <ippm@ietf.org>
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Subject: Re: [ippm] WGLC for draft-ietf-ippm-capacity-metric-method
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Hi Al,
thank you for your consideration of my comments. Please find my notes
in-line under the GIM>> tag.

Regards,
Greg

On Sat, Sep 5, 2020 at 12:14 PM MORTON, ALFRED C (AL) <acm@research.att.com=
>
wrote:

> Hi Greg,
>
>
>
> Thanks for your careful review and comments!
>
>
>
> Please see [acm] replies below, all changes are implemented in the workin=
g
> version.
>
>
>
> Al, for the co-authors
>
>
>
> *From:* ippm [mailto:ippm-bounces@ietf.org] *On Behalf Of *Greg Mirsky
> *Sent:* Tuesday, September 1, 2020 9:44 AM
> *To:* Tommy Pauly <tpauly=3D40apple.com@dmarc.ietf.org>
> *Cc:* IETF IPPM WG (ippm@ietf.org) <ippm@ietf.org>
> *Subject:* Re: [ippm] WGLC for draft-ietf-ippm-capacity-metric-method
>
>
>
> Hi Tommy,
>
> I support the publication of this document. It is well-written and, when
> published, become an essential component of industry-wide work on definin=
g
> the IP Maximum Capacity metric and its measurement methodology.
>
>
>
> Dear Authors,
>
> thank you for this work. I have several questions and a number of
> editorial suggestions that you might find useful. I greatly appreciate yo=
ur
> consideration of the comments below:
>
>    - Is this document intended to update an RFC? The first page suggests
>    that you have thought about that but have not yet pointed to the RFC t=
o be
>    updated. If you decide that the new document does update the existing =
RFC,
>    you may note that also in the Abstract.
>
> *[acm] RFC5136, mentioned in the Abstract and Intro, is only Informationa=
l
> Status. We are revisiting the problem with a more practical standards tra=
ck
> solution, and developed new metrics as a result (not updating the old
> ones).*
>
>    - The document uses a significant number of acronyms that probably are
>    not well-known at IETF, e.g., RTD, RTL, etc. I think that adding a
>    sub-section Acronyms will be helpful to a reader.
>
> *[acm] If you=E2=80=99ll allow, most of the acronyms are already defined =
in list
> of Section 4, and others at first usage of course.*
>
GIM>> I'm looking at the current version of the draft in the datatracker
<https://datatracker.ietf.org/doc/draft-ietf-ippm-capacity-metric-method/?i=
nclude_text=3D1>.
I think that some acronyms never expanded, e.g., RTD, RTL, OWL.

>
>    - A number of references don't work as links, e.g., "[ refs to ITU-T
>    SG12, ETSI STQ, BBF liaisons ]".
>
> *[acm] I chose a couple of key LS and provided the references.*
>
> Also, several sections are references by title, e.g., "[see section
> Related Round-Trip Delay and Loss Definitions below]", and that makes
> finding the right place more challenging.
>
> *[acm] I think these are all fixed now.*
>
>    - In Section 4 a source IP address of a host accompanied with a note
>    "such as the globally routable IP address". Should the note be
>    interpreted as an example or as a normative statement?
>
> *[acm] =E2=80=9Csuch as=E2=80=9D typically indicates an example follows, =
and that=E2=80=99s the
> case here.*
>
>    - Section 4 defines dt as "dt, the duration of N equal sub-intervals
>    in I (default 1 sec)". But further in the document, on two occasions, =
it is
>    noted that "all sub-intervals SHOULD be of equal duration". If dt MAY =
be of
>    varying duration, then the definition in Section 4 might be changed to=
 "dt,
>    the duration of N sub-intervals in I (default 1 sec)". On the other ha=
nd,
>    if that definition is interpreted as normative, then s/SHOULD/MUST/2.
>
> *[acm] I was trying to cover practical realities in timing at hosts with
> =E2=80=9CSHOULD=E2=80=9D. Maybe it=E2=80=99s better to add =E2=80=9Cnomin=
al=E2=80=9D to the definitions of I and
> dt, then the text can use MUST and avoid intentional variation << which i=
s
> NOT what we want!*
>
GIM>> Thank you, I agree with the resolution.

>
>    - It is not obvious whether "Note that the UDP transport layer is one
>    requirement specified below." applies to the test protocol or somethin=
g
>    else.
>
> *[acm] Ok, clarified as:  Type-P, the complete description of the test
> packets for which this assessment applies (including the flow-defining
> fields). Note that the UDP transport layer is one requirement for test
> packets specified below.*
>
> *Keep in mind that Type-P always applies to the test packets; control
> packets could be anything!*
>
GIM>> I agree with the update, thank you.

>
>    - Also, in Section 4, the last sentence notes that
>
>    Note that time stamps, sequnce numbers, etc. will be established by
>
>    the test protocol.
>
> Perhaps that may be put as a requirement for the test protocol.
>
> *[acm] I added this in Section 9.1:*
>
> *For example, timestamp resolution requirements that influence the choice
> of the test protocol are provided in Table 2 of [TR-471].*
>
> GIM>> Thank you. Referencing TR-471 is fine by me but some might think
differently.

>
>    - Security Consideration section references RFC 4656 OWAMP and RFC
>    5357 TWAMP. Do you think that adding references to RFC 8672 STAMP and
>    draft-ietf-ippm-stamp-option-tlv, as STAMP and its extensions, might b=
e
>    used as the protocol to measure the IP Capacity, is helpful?
>
> *[acm] I read the unique STAMP considerations in RFC 8762, and there seem=
s
> to be enough coverage from the (now) 6 new security considerations we hav=
e
> written for Capacity testing (and other requirements in the memo).*
>
>    - I think that the requirement to provide control of the number of
>    concurrent test sessions can be stronger, as the rate-limiting require=
ment,
>    than a recommendation. The requirement is more applicable to the test
>    protocol that MUST provide control over the number of simultaneous tes=
t
>    sessions.
>
> *[acm] OK, I can live with up-levelling concurrent test session control t=
o
> a MUST. It seems like an easy limit for server code to enforce.*
>
GIM>> Thank you.

> Several nits:
>
>    - s/[copycat
>    <https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__tools.ietf.org=
_html_draft-2Dietf-2Dippm-2Dcapacity-2Dmetric-2Dmethod-2D03-23ref-2Dcopycat=
&d=3DDwMFaQ&c=3DLFYZ-o9_HUMeMTSQicvjIg&r=3DOfsSu8kTIltVyD1oL72cBw&m=3DyKzCa=
Ddxr4ZdtpAPWdBs6Wb5h1-FvV9zQ-I02NWaLWA&s=3DbeL2wAnc1YD9IALGvCN_EpsLAeRb8zYK=
b7Mlx4oxmuw&e=3D>
>    ][copycat]/[copycat]/*[acm] * *ok*
>    -  s/sequnce/sequence/*[acm] * *ok*
>    - A reference in "Type-P is a parallel concept to "population of
>    interest" defined in ITU-T Rec. Y.1540." will be helpful.*[acm] * *ok,
>    it=E2=80=99s clause 6.1.1, added*
>    - I assume that in "T, the host time of the *first* test packet's
>    *arrival* as measured at MP(Dst)", MP stands for Measurement Point. Is=
 that
>    correct?*[acm] * *yes, fixed.*
>    - Capitalization in "Target performance threshold" throughout the
>    document needs consistency, on several occasions, it is used as "targe=
t
>    performance threshold".*[acm] * *ok, fixed.*
>
> Regards,
>
> Greg
>
>
>
>
>
> On Fri, Aug 14, 2020 at 2:21 PM Tommy Pauly <tpauly=3D
> 40apple.com@dmarc.ietf.org> wrote:
>
> Hello IPPM,
>
>
>
> As discussed at IETF 108, draft-ietf-ippm-capacity-metric-method is
> stable, and the group felt it is ready for Working Group Last Call.
>
>
>
> The latest version can be found here:
> https://tools.ietf.org/html/draft-ietf-ippm-capacity-metric-method-02
> <https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__tools.ietf.org_ht=
ml_draft-2Dietf-2Dippm-2Dcapacity-2Dmetric-2Dmethod-2D02&d=3DDwMFaQ&c=3DLFY=
Z-o9_HUMeMTSQicvjIg&r=3DOfsSu8kTIltVyD1oL72cBw&m=3DyKzCaDdxr4ZdtpAPWdBs6Wb5=
h1-FvV9zQ-I02NWaLWA&s=3DXJLQkG2WsakslD6KgDyuPlbYYPyQ_p9iWs_WVGuv4ag&e=3D>
>
>
>
> The last call will end on *Wednesday, September 2*. Please reply to
> ippm@ietf.org with your reviews and comments, and indicate if you think
> the document is ready to progress!
>
>
>
> Best,
>
> Tommy & Ian
>
> _______________________________________________
> ippm mailing list
> ippm@ietf.org
> https://www.ietf.org/mailman/listinfo/ippm
> <https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__www.ietf.org_mail=
man_listinfo_ippm&d=3DDwMFaQ&c=3DLFYZ-o9_HUMeMTSQicvjIg&r=3DOfsSu8kTIltVyD1=
oL72cBw&m=3DyKzCaDdxr4ZdtpAPWdBs6Wb5h1-FvV9zQ-I02NWaLWA&s=3DK2fFqjaHzvIMcEC=
6GDeXGDKXo66lSqVsO0sreMaEraI&e=3D>
>
>

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<div dir=3D"ltr"><div dir=3D"ltr">Hi Al,<br><div>thank you for your conside=
ration of my comments. Please find my notes in-line under the GIM&gt;&gt; t=
ag.</div><div><br></div><div>Regards,</div><div>Greg</div></div><br><div cl=
ass=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Sat, Sep 5, 20=
20 at 12:14 PM MORTON, ALFRED C (AL) &lt;<a href=3D"mailto:acm@research.att=
.com" target=3D"_blank">acm@research.att.com</a>&gt; wrote:<br></div><block=
quote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1=
px solid rgb(204,204,204);padding-left:1ex">





<div lang=3D"EN-US">
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:&quot;Cour=
ier New&quot;;color:black">Hi Greg,<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:&quot;Cour=
ier New&quot;;color:black"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:&quot;Cour=
ier New&quot;;color:black">Thanks for your careful review and comments!<u><=
/u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:&quot;Cour=
ier New&quot;;color:black"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:&quot;Cour=
ier New&quot;;color:black">Please see [acm] replies below, all changes are =
implemented in the working version.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:&quot;Cour=
ier New&quot;;color:black"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:&quot;Cour=
ier New&quot;;color:black">Al, for the co-authors<u></u><u></u></span></p>
<p class=3D"MsoNormal"><a name=3D"m_-2592053953038111391_m_6526182902498538=
84__MailEndCompose"><span style=3D"font-size:11pt;font-family:&quot;Courier=
 New&quot;;color:black"><u></u>=C2=A0<u></u></span></a></p>
<div style=3D"border-top:none;border-right:none;border-bottom:none;border-l=
eft:1.5pt solid blue;padding:0in 0in 0in 4pt">
<div>
<div style=3D"border-right:none;border-bottom:none;border-left:none;border-=
top:1pt solid rgb(225,225,225);padding:3pt 0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11pt;font-family:Calibri=
,sans-serif">From:</span></b><span style=3D"font-size:11pt;font-family:Cali=
bri,sans-serif"> ippm [mailto:<a href=3D"mailto:ippm-bounces@ietf.org" targ=
et=3D"_blank">ippm-bounces@ietf.org</a>]
<b>On Behalf Of </b>Greg Mirsky<br>
<b>Sent:</b> Tuesday, September 1, 2020 9:44 AM<br>
<b>To:</b> Tommy Pauly &lt;tpauly=3D<a href=3D"mailto:40apple.com@dmarc.iet=
f.org" target=3D"_blank">40apple.com@dmarc.ietf.org</a>&gt;<br>
<b>Cc:</b> IETF IPPM WG (<a href=3D"mailto:ippm@ietf.org" target=3D"_blank"=
>ippm@ietf.org</a>) &lt;<a href=3D"mailto:ippm@ietf.org" target=3D"_blank">=
ippm@ietf.org</a>&gt;<br>
<b>Subject:</b> Re: [ippm] WGLC for draft-ietf-ippm-capacity-metric-method<=
u></u><u></u></span></p>
</div>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<p class=3D"MsoNormal">Hi Tommy,<u></u><u></u></p>
<div>
<p class=3D"MsoNormal">I support the publication of this document. It is we=
ll-written and, when published, become an essential component of industry-w=
ide work on defining the IP Maximum Capacity metric and its measurement met=
hodology.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Dear Authors,<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">thank you for this work. I have several questions an=
d a number of editorial suggestions that you might find useful. I greatly a=
ppreciate your consideration of the comments below:<u></u><u></u></p>
</div>
<div>
<ul type=3D"disc">
<li class=3D"MsoNormal">
Is this document intended to update an RFC? The first page suggests that yo=
u have thought about that but have not yet pointed to the RFC to be updated=
. If you decide that the new document does update the existing RFC, you may=
 note that also in the Abstract.<u></u><u></u></li></ul>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11pt;font-family:&quo=
t;Courier New&quot;;color:black">[acm] RFC5136, mentioned in the Abstract a=
nd Intro, is only Informational Status. We are revisiting the
 problem with a more practical standards track solution, and developed new =
metrics as a result (not updating the old ones).</span></i></b><span style=
=3D"font-size:11pt;font-family:&quot;Courier New&quot;;color:black"><u></u>=
<u></u></span></p>
<ul type=3D"disc">
<li class=3D"MsoNormal">
The document uses a significant number=C2=A0of acronyms that probably are n=
ot well-known at IETF, e.g., RTD, RTL, etc. I think that adding a sub-secti=
on Acronyms will be helpful to a reader.<u></u><u></u></li></ul>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11pt;font-family:&quo=
t;Courier New&quot;;color:black">[acm] If you=E2=80=99ll allow, most of the=
 acronyms are already defined in list of Section 4, and others at first
 usage of course.</span></i></b></p></div></div></div></div></div></blockqu=
ote><div>GIM&gt;&gt; I&#39;m looking at <a href=3D"https://datatracker.ietf=
.org/doc/draft-ietf-ippm-capacity-metric-method/?include_text=3D1">the curr=
ent version of the draft in the datatracker</a>. I think that some acronyms=
 never expanded, e.g., RTD, RTL, OWL.</div><blockquote class=3D"gmail_quote=
" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);=
padding-left:1ex"><div lang=3D"EN-US"><div><div style=3D"border-top:none;bo=
rder-right:none;border-bottom:none;border-left:1.5pt solid blue;padding:0in=
 0in 0in 4pt"><div><div><p class=3D"MsoNormal"><b><i><span style=3D"font-si=
ze:11pt;font-family:&quot;Courier New&quot;;color:black"> </span></i></b><s=
pan style=3D"font-size:11pt;font-family:&quot;Courier New&quot;;color:black=
"><u></u><u></u></span></p>
<ul type=3D"disc">
<li class=3D"MsoNormal">
A number of references don&#39;t work as links, e.g., &quot;[ refs to ITU-T=
 SG12, ETSI STQ, BBF liaisons ]&quot;.
<u></u><u></u></li></ul>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11pt;font-family:&quo=
t;Courier New&quot;;color:black">[acm] I chose a couple of key LS and provi=
ded the references.<u></u><u></u></span></i></b></p>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">
Also, several sections are references by title, e.g., &quot;[see section Re=
lated Round-Trip Delay and Loss Definitions below]&quot;,=C2=A0and that mak=
es finding the right place more challenging.<u></u><u></u></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11pt;font-family:&quo=
t;Courier New&quot;;color:black">[acm] I think these are all fixed now.</sp=
an></i></b><span style=3D"font-size:11pt;font-family:&quot;Courier New&quot=
;;color:black"><u></u><u></u></span></p>
<ul type=3D"disc">
<li class=3D"MsoNormal">
In Section 4 a source IP address of a host accompanied with a note &quot;su=
ch as the globally routable IP address&quot;. Should the note be interprete=
d=C2=A0as an example or as a normative statement?<u></u><u></u></li></ul>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11pt;font-family:&quo=
t;Courier New&quot;;color:black">[acm] =E2=80=9Csuch as=E2=80=9D typically =
indicates an example follows, and that=E2=80=99s the case here.</span></i><=
/b><span style=3D"font-size:11pt;font-family:&quot;Courier New&quot;;color:=
black"><u></u><u></u></span></p>
<ul type=3D"disc">
<li class=3D"MsoNormal">
Section 4 defines dt as &quot;dt, the duration of N equal sub-intervals in =
I (default 1 sec)&quot;. But further in the document, on two occasions, it =
is noted that &quot;all sub-intervals SHOULD be of equal duration&quot;. If=
 dt MAY be of varying duration, then the definition
 in Section 4 might be changed to &quot;dt, the duration of N sub-intervals=
 in I (default 1 sec)&quot;. On the other hand, if that definition is inter=
preted=C2=A0as normative, then s/SHOULD/MUST/2.<u></u><u></u></li></ul>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11pt;font-family:&quo=
t;Courier New&quot;;color:black">[acm] I was trying to cover practical real=
ities in timing at hosts with =E2=80=9CSHOULD=E2=80=9D. Maybe it=E2=80=99s =
better to
 add =E2=80=9Cnominal=E2=80=9D to the definitions of I and dt, then the tex=
t can use MUST and avoid intentional variation &lt;&lt; which is NOT what w=
e want!</span></i></b></p></div></div></div></div></div></blockquote><div>G=
IM&gt;&gt; Thank you, I agree with the resolution.=C2=A0</div><blockquote c=
lass=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px soli=
d rgb(204,204,204);padding-left:1ex"><div lang=3D"EN-US"><div><div style=3D=
"border-top:none;border-right:none;border-bottom:none;border-left:1.5pt sol=
id blue;padding:0in 0in 0in 4pt"><div><div><p class=3D"MsoNormal"><span sty=
le=3D"font-size:11pt;font-family:&quot;Courier New&quot;;color:black"><u></=
u><u></u></span></p>
<ul type=3D"disc">
<li class=3D"MsoNormal">
It is not obvious whether &quot;Note that the UDP transport layer is one re=
quirement specified below.&quot; applies to the test protocol or something =
else.<u></u><u></u></li></ul>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11pt;font-family:&quo=
t;Courier New&quot;;color:black">[acm] Ok, clarified as:=C2=A0 Type-P, the =
complete description of the
<u>test</u> packets for which this assessment applies (including the flow-d=
efining fields). Note that the UDP transport layer is one requirement for
<u>test</u> packets specified below.<u></u><u></u></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11pt;font-family:&quo=
t;Courier New&quot;;color:black">Keep in mind that Type-P always applies to=
 the test packets; control packets could be anything!</span></i></b></p></d=
iv></div></div></div></div></blockquote><div>GIM&gt;&gt; I agree with the u=
pdate, thank you.=C2=A0</div><blockquote class=3D"gmail_quote" style=3D"mar=
gin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1=
ex"><div lang=3D"EN-US"><div><div style=3D"border-top:none;border-right:non=
e;border-bottom:none;border-left:1.5pt solid blue;padding:0in 0in 0in 4pt">=
<div><div><p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:=
&quot;Courier New&quot;;color:black"><u></u><u></u></span></p>
<ul type=3D"disc">
<li class=3D"MsoNormal">
Also, in Section 4, the last sentence notes that<u></u><u></u></li></ul>
</div>
<blockquote style=3D"margin-left:30pt;margin-right:0in">
<div>
<p class=3D"MsoNormal">=C2=A0 =C2=A0Note that time stamps, sequnce numbers,=
 etc. will be established by<u></u><u></u></p>
</div>
</blockquote>
<blockquote style=3D"margin-left:30pt;margin-right:0in">
<div>
<p class=3D"MsoNormal">=C2=A0 =C2=A0the test protocol.<u></u><u></u></p>
</div>
</blockquote>
<blockquote style=3D"margin-left:30pt;margin-right:0in">
<div>
<p class=3D"MsoNormal">Perhaps that may be put as a requirement for the tes=
t protocol.<span style=3D"color:black"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11pt;font-family:&quo=
t;Courier New&quot;;color:black">[acm] I added this in Section 9.1:</span><=
/i></b>
<u></u><u></u></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11pt;font-family:&quo=
t;Courier New&quot;;color:black">For example, timestamp resolution requirem=
ents that influence the choice of the test protocol are provided in Table 2=
 of [TR-471].</span></i></b></p></div></blockquote></div></div></div></div>=
</blockquote><div>GIM&gt;&gt; Thank you. Referencing TR-471 is fine by me b=
ut some might think differently.=C2=A0</div><blockquote class=3D"gmail_quot=
e" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204)=
;padding-left:1ex"><div lang=3D"EN-US"><div><div style=3D"border-top:none;b=
order-right:none;border-bottom:none;border-left:1.5pt solid blue;padding:0i=
n 0in 0in 4pt"><div><blockquote style=3D"margin-left:30pt;margin-right:0in"=
><div><p class=3D"MsoNormal"><b><i><span style=3D"font-size:11pt;font-famil=
y:&quot;Courier New&quot;;color:black"><u></u><u></u></span></i></b></p>
</div>
</blockquote>
<ul type=3D"disc">
<li class=3D"MsoNormal">
Security Consideration section references RFC 4656 OWAMP and RFC 5357 TWAMP=
. Do you think that adding references to RFC 8672 STAMP and draft-ietf-ippm=
-stamp-option-tlv, as STAMP and its extensions, might be used as the protoc=
ol to measure the IP Capacity, is
 helpful?<u></u><u></u></li></ul>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11pt;font-family:&quo=
t;Courier New&quot;;color:black">[acm] I read the unique STAMP consideratio=
ns in RFC 8762, and there seems to be enough coverage from the
 (now) 6 new security considerations we have written for Capacity testing (=
and other requirements in the memo).</span></i></b><span style=3D"font-size=
:11pt;font-family:&quot;Courier New&quot;;color:black"><u></u><u></u></span=
></p>
<ul type=3D"disc">
<li class=3D"MsoNormal">
I think that the requirement to provide control of the number of concurrent=
 test sessions can be stronger, as the rate-limiting requirement, than a re=
commendation. The requirement is more applicable to the test protocol that =
MUST provide control over the number
 of simultaneous test sessions.=C2=A0<u></u><u></u></li></ul>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11pt;font-family:&quo=
t;Courier New&quot;;color:black">[acm] OK, I can live with up-levelling con=
current test session control to a MUST. It seems like an easy
 limit for server code to enforce.</span></i></b></p></div></div></div></di=
v></blockquote><div>GIM&gt;&gt; Thank you.=C2=A0</div><blockquote class=3D"=
gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(20=
4,204,204);padding-left:1ex"><div lang=3D"EN-US"><div><div style=3D"border-=
top:none;border-right:none;border-bottom:none;border-left:1.5pt solid blue;=
padding:0in 0in 0in 4pt"><div><p class=3D"MsoNormal"><b><i><span style=3D"f=
ont-size:11pt;font-family:&quot;Courier New&quot;;color:black"><u></u><u></=
u></span></i></b></p>
<div>
<p class=3D"MsoNormal">Several nits:<u></u><u></u></p>
</div>
<div>
<ul type=3D"disc">
<li class=3D"MsoNormal">
s/<span style=3D"color:rgb(14,16,26)">[</span><a href=3D"https://urldefense=
.proofpoint.com/v2/url?u=3Dhttps-3A__tools.ietf.org_html_draft-2Dietf-2Dipp=
m-2Dcapacity-2Dmetric-2Dmethod-2D03-23ref-2Dcopycat&amp;d=3DDwMFaQ&amp;c=3D=
LFYZ-o9_HUMeMTSQicvjIg&amp;r=3DOfsSu8kTIltVyD1oL72cBw&amp;m=3DyKzCaDdxr4Zdt=
pAPWdBs6Wb5h1-FvV9zQ-I02NWaLWA&amp;s=3DbeL2wAnc1YD9IALGvCN_EpsLAeRb8zYKb7Ml=
x4oxmuw&amp;e=3D" target=3D"_blank"><span style=3D"color:rgb(74,110,224)">c=
opycat</span></a><span style=3D"color:rgb(14,16,26)">][copycat]/[copycat]/<=
/span><b><i><span style=3D"color:black">[acm]
</span></i></b><span style=3D"color:black">=C2=A0<b>ok</b></span><u></u><u>=
</u></li><li class=3D"MsoNormal">
=C2=A0s/sequnce/sequence/<b><i><span style=3D"color:black">[acm] </span></i=
></b><span style=3D"color:black">=C2=A0<b>ok</b></span><u></u><u></u></li><=
li class=3D"MsoNormal">
A reference in &quot;Type-P is a parallel concept to &quot;population of in=
terest&quot; defined in ITU-T Rec. Y.1540.&quot; will be helpful.<b><i><spa=
n style=3D"color:black">[acm]
</span></i></b><span style=3D"color:black">=C2=A0<b>ok, it=E2=80=99s clause=
 6.1.1, added</b></span><u></u><u></u></li><li class=3D"MsoNormal">
I assume that in &quot;T, the host time of the *first* test packet&#39;s *a=
rrival* as=C2=A0measured at MP(Dst)&quot;, MP stands for Measurement Point.=
 Is that correct?<b><i><span style=3D"color:black">[acm]
</span></i></b><span style=3D"color:black">=C2=A0<b>yes, fixed.</b></span><=
u></u><u></u></li><li class=3D"MsoNormal">
Capitalization=C2=A0in &quot;Target performance threshold&quot; throughout =
the document needs consistency, on several occasions, it is used as &quot;t=
arget performance threshold&quot;.<b><i><span style=3D"color:black">[acm]
</span></i></b><span style=3D"color:black">=C2=A0<b>ok, fixed.</b></span><u=
></u><u></u></li></ul>
<div>
<p class=3D"MsoNormal">Regards,<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Greg<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<div>
<p class=3D"MsoNormal">On Fri, Aug 14, 2020 at 2:21 PM Tommy Pauly &lt;tpau=
ly=3D<a href=3D"mailto:40apple.com@dmarc.ietf.org" target=3D"_blank">40appl=
e.com@dmarc.ietf.org</a>&gt; wrote:<u></u><u></u></p>
</div>
<blockquote style=3D"border-top:none;border-right:none;border-bottom:none;b=
order-left:1pt solid rgb(204,204,204);padding:0in 0in 0in 6pt;margin-left:4=
.8pt;margin-right:0in">
<div>
<p class=3D"MsoNormal">Hello IPPM,<u></u><u></u></p>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">As discussed at IETF 108, draft-ietf-ippm-capacity-m=
etric-method is stable, and the group felt it is ready for Working Group La=
st Call.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">The latest version can be found here:=C2=A0<a href=
=3D"https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__tools.ietf.org_h=
tml_draft-2Dietf-2Dippm-2Dcapacity-2Dmetric-2Dmethod-2D02&amp;d=3DDwMFaQ&am=
p;c=3DLFYZ-o9_HUMeMTSQicvjIg&amp;r=3DOfsSu8kTIltVyD1oL72cBw&amp;m=3DyKzCaDd=
xr4ZdtpAPWdBs6Wb5h1-FvV9zQ-I02NWaLWA&amp;s=3DXJLQkG2WsakslD6KgDyuPlbYYPyQ_p=
9iWs_WVGuv4ag&amp;e=3D" target=3D"_blank">https://tools.ietf.org/html/draft=
-ietf-ippm-capacity-metric-method-02</a><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">The last call will end on <b>Wednesday, September 2<=
/b>. Please reply to
<a href=3D"mailto:ippm@ietf.org" target=3D"_blank">ippm@ietf.org</a>=C2=A0w=
ith your reviews and comments, and indicate if you think the document is re=
ady to progress!<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Best,<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Tommy &amp; Ian<u></u><u></u></p>
</div>
</div>
<p class=3D"MsoNormal">_______________________________________________<br>
ippm mailing list<br>
<a href=3D"mailto:ippm@ietf.org" target=3D"_blank">ippm@ietf.org</a><br>
<a href=3D"https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__www.ietf.=
org_mailman_listinfo_ippm&amp;d=3DDwMFaQ&amp;c=3DLFYZ-o9_HUMeMTSQicvjIg&amp=
;r=3DOfsSu8kTIltVyD1oL72cBw&amp;m=3DyKzCaDdxr4ZdtpAPWdBs6Wb5h1-FvV9zQ-I02NW=
aLWA&amp;s=3DK2fFqjaHzvIMcEC6GDeXGDKXo66lSqVsO0sreMaEraI&amp;e=3D" target=
=3D"_blank">https://www.ietf.org/mailman/listinfo/ippm</a><u></u><u></u></p=
>
</blockquote>
</div>
</div>
</div>
</div>
</div>

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

--0000000000005d035e05af0e057a--


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From: "MORTON, ALFRED C (AL)" <acm@research.att.com>
To: Greg Mirsky <gregimirsky@gmail.com>
CC: Tommy Pauly <tpauly=40apple.com@dmarc.ietf.org>, "IETF IPPM WG (ippm@ietf.org)" <ippm@ietf.org>
Thread-Topic: [ippm] WGLC for draft-ietf-ippm-capacity-metric-method
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Date: Sat, 12 Sep 2020 12:34:12 +0000
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Subject: Re: [ippm] WGLC for draft-ietf-ippm-capacity-metric-method
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From nobody Fri Sep 18 01:39:36 2020
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Subject: [ippm] I-D Action: draft-ietf-ippm-ioam-ipv6-options-03.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 IP Performance Measurement WG of the IETF.

        Title           : In-situ OAM IPv6 Options
        Authors         : Shwetha Bhandari
                          Frank Brockners
                          Carlos Pignataro
                          Hannes Gredler
                          John Leddy
                          Stephen Youell
                          Tal Mizrahi
                          Aviv Kfir
                          Barak Gafni
                          Petr Lapukhov
                          Mickey Spiegel
                          Suresh Krishnan
                          Rajiv Asati
                          Mark Smith
	Filename        : draft-ietf-ippm-ioam-ipv6-options-03.txt
	Pages           : 13
	Date            : 2020-09-18

Abstract:
   In-situ Operations, Administration, and Maintenance (IOAM) records
   operational and telemetry information in the packet while the packet
   traverses a path between two points in the network.  This document
   outlines how IOAM data fields are encapsulated in IPv6.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-ippm-ioam-ipv6-options/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-ippm-ioam-ipv6-options-03
https://datatracker.ietf.org/doc/html/draft-ietf-ippm-ioam-ipv6-options-03

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-ippm-ioam-ipv6-options-03


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: "Frank Brockners (fbrockne)" <fbrockne@cisco.com>
To: Tommy Pauly <tpauly@apple.com>, "draft-ietf-ippm-ioam-ipv6-options@ietf.org" <draft-ietf-ippm-ioam-ipv6-options@ietf.org>, "draft-ioametal-ippm-6man-ioam-ipv6-deployment@ietf.org" <draft-ioametal-ippm-6man-ioam-ipv6-deployment@ietf.org>
CC: IPPM Chairs <ippm-chairs@ietf.org>, Martin Duke <martin.h.duke@gmail.com>,  "IETF IPPM WG (ippm@ietf.org)" <ippm@ietf.org>
Thread-Topic: Merging deployment considerations into IPv6 IOAM document
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Date: Fri, 18 Sep 2020 08:56:32 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/ippm/wlKQY9yjmUOkxM6AiuHOBWsEzZI>
Subject: Re: [ippm] Merging deployment considerations into IPv6 IOAM document
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Hi Tommy, IPPM WG,

we just posted an updated draft-ietf-ippm-ioam-ipv6-options-03 which merges=
 draft-ioametal-ippm-6man-ioam-ipv6-deployment into draft-ietf-ippm-ioam-ip=
v6-options plus it reflects the WG discussion of the last IPPM meeting.

The updates to draft-ietf-ippm-ioam-ipv6-options-03 are

* implement the guidance from the WG chairs: Merge in draft-ioametal-ippm-6=
man-ioam-ipv6-deployment "as is", i.e. only editorial changes were made (e.=
g. resolve references which would have been circular).
* implement the result of discussion in the last WG meeting: Removed the pa=
ragraph that started with " In order for IOAM to work in IPv6 networks.." w=
hich included deployment considerations.

Moving forward, we'll need to further evolve the deployment section (now se=
ction 4).=20
There were already comments raised in the IOAM DT wrt/ what is now section =
4.4.1 by Haoyu. I asked  Haoyu to take those to the IPPM list.=20

Cheers, Frank

> -----Original Message-----
> From: Tommy Pauly <tpauly@apple.com>
> Sent: Freitag, 14. August 2020 23:12
> To: draft-ietf-ippm-ioam-ipv6-options@ietf.org; draft-ioametal-ippm-6man-
> ioam-ipv6-deployment@ietf.org
> Cc: IPPM Chairs <ippm-chairs@ietf.org>; Martin Duke
> <martin.h.duke@gmail.com>
> Subject: Merging deployment considerations into IPv6 IOAM document
>=20
> Hi IOAM IPv6 authors,
>=20
> At IETF 108, we discussed draft-ietf-ippm-ioam-ipv6-options and draft-ioa=
metal-
> ippm-6man-ioam-ipv6-deployment, and how to progress with the deployment
> considerations. Since the hums showed no strong opinions one way or the o=
ther
> in the WG, Ian and I have discussed and would prefer to see the deploymen=
t
> considerations merged into the existing and adopted IPv6 options document=
.
> Both documents are short, and readers will benefit from any discussion of
> deployment being available in the same document that defines the extensio=
n
> header.
>=20
> Please post an update for draft-ietf-ippm-ioam-ipv6-options with this con=
tent
> added when you have a chance!
>=20
> Thanks,
> Tommy


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From: Rakesh Gandhi <rgandhi.ietf@gmail.com>
Date: Mon, 28 Sep 2020 08:40:20 -0400
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Subject: [ippm] Updated draft-gandhi-spring-sr-enhanced-plm-03
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--000000000000d6a2ee05b05ef8f9
Content-Type: text/plain; charset="UTF-8"

Hi WG,
We have posted a new revision that addresses various comments received.
Updates are as following:

   - Add TWAMP (STAMP) compatible probe message format
   - Use consistent terms for MPLS Timestamp Label and SRv6 Timestamp
   Endpoint
   - Add extension Label in MPLS header
   - Add section on SRv6 Timestamp Endpoint function assignment and Node
   Capability
   - Update IANA section
   - Various editorial changes (e.g. moving some text to new Overview
   section)

URL:
https://www.ietf.org/id/draft-gandhi-spring-sr-enhanced-plm-03.txt

Status:
https://datatracker.ietf.org/doc/draft-gandhi-spring-sr-enhanced-plm/

Htmlized:
https://datatracker.ietf.org/doc/html/draft-gandhi-spring-sr-enhanced-plm

Htmlized:
https://tools.ietf.org/html/draft-gandhi-spring-sr-enhanced-plm-03

Diff:
https://www.ietf.org/rfcdiff?url2=draft-gandhi-spring-sr-enhanced-plm-03

Thank you for the feedback. Welcome your further comments and suggestions.

Thanks,
Rakesh (on behalf of the authors)

--000000000000d6a2ee05b05ef8f9
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div><font size=3D"2">Hi WG,</font></div><div><font size=
=3D"2">We have posted a new revision that addresses various comments receiv=
ed. Updates are as following:</font></div><div><ul><li><font size=3D"2"><sp=
an>Add TWAMP (STAMP) compatible
probe message format<span></span></span></font></li><li><font size=3D"2"><s=
pan>Use consistent terms for MPLS
Timestamp Label and SRv6 Timestamp Endpoint<span></span></span></font></li>=
<li><font size=3D"2"><span>Add extension Label in
MPLS header<span></span></span></font></li><li><font size=3D"2"><span>Add s=
ection on SRv6 Timestamp
Endpoint function assignment and Node Capability<span></span></span></font>=
</li><li><font size=3D"2"><span>Update IANA section<span></span></span></fo=
nt></li><li><font size=3D"2"><span>Various editorial changes
(e.g. moving some text to new Overview section)</span></font></li></ul><div=
>


















<p class=3D"MsoNormal" style=3D"margin:0cm;font-family:&quot;Calibri&quot;,=
sans-serif"><font size=3D"2"><span style=3D"font-family:&quot;-webkit-stand=
ard&quot;,serif;color:black">URL:=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0<a href=3D"https://www.ietf.org/id/draft-gand=
hi-spring-sr-enhanced-plm-03.txt" style=3D"color:rgb(5,99,193);text-decorat=
ion:underline">https://www.ietf.org/id/draft-gandhi-spring-sr-enhanced-plm-=
03.txt</a><span></span></span></font></p>

<p class=3D"MsoNormal" style=3D"margin:0cm;font-family:&quot;Calibri&quot;,=
sans-serif"><font size=3D"2"><span style=3D"font-family:&quot;-webkit-stand=
ard&quot;,serif;color:black">Status:=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0<span class=3D"gmail-apple-converted-space">=C2=A0</span><a href=
=3D"https://datatracker.ietf.org/doc/draft-gandhi-spring-sr-enhanced-plm/" =
style=3D"color:rgb(5,99,193);text-decoration:underline">https://datatracker=
.ietf.org/doc/draft-gandhi-spring-sr-enhanced-plm/</a><span></span></span><=
/font></p>

<p class=3D"MsoNormal" style=3D"margin:0cm;font-family:&quot;Calibri&quot;,=
sans-serif"><font size=3D"2"><span style=3D"font-family:&quot;-webkit-stand=
ard&quot;,serif;color:black">Htmlized:=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0<=
span class=3D"gmail-apple-converted-space">=C2=A0</span><a href=3D"https://=
datatracker.ietf.org/doc/html/draft-gandhi-spring-sr-enhanced-plm" style=3D=
"color:rgb(5,99,193);text-decoration:underline">https://datatracker.ietf.or=
g/doc/html/draft-gandhi-spring-sr-enhanced-plm</a><span></span></span></fon=
t></p>

<p class=3D"MsoNormal" style=3D"margin:0cm;font-family:&quot;Calibri&quot;,=
sans-serif"><font size=3D"2"><span style=3D"font-family:&quot;-webkit-stand=
ard&quot;,serif;color:black">Htmlized:=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0<=
span class=3D"gmail-apple-converted-space">=C2=A0</span><a href=3D"https://=
tools.ietf.org/html/draft-gandhi-spring-sr-enhanced-plm-03" style=3D"color:=
rgb(5,99,193);text-decoration:underline">https://tools.ietf.org/html/draft-=
gandhi-spring-sr-enhanced-plm-03</a><span></span></span></font></p>

<p class=3D"MsoNormal" style=3D"margin:0cm;font-family:&quot;Calibri&quot;,=
sans-serif"><font size=3D"2"><span style=3D"font-family:&quot;-webkit-stand=
ard&quot;,serif;color:black">Diff:=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0<span class=3D"gmail-apple-converted-space">=C2=A0</sp=
an><a href=3D"https://www.ietf.org/rfcdiff?url2=3Ddraft-gandhi-spring-sr-en=
hanced-plm-03" style=3D"color:rgb(5,99,193);text-decoration:underline">http=
s://www.ietf.org/rfcdiff?url2=3Ddraft-gandhi-spring-sr-enhanced-plm-03</a><=
span></span></span></font></p>





</div><div><font size=3D"2"><br></font></div><div><font size=3D"2">Thank yo=
u for the feedback. Welcome your further comments and suggestions. </font><=
/div><div><font size=3D"2"><br></font></div><div><font size=3D"2">Thanks,</=
font></div><div><font size=3D"2">Rakesh (on behalf of the authors)</font></=
div><div><font size=3D"2"><br></font></div>





</div></div>

--000000000000d6a2ee05b05ef8f9--


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From: Tommy Pauly <tpauly@apple.com>
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Date: Tue, 29 Sep 2020 11:18:56 -0700
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Cc: draft-ietf-ippm-ioam-ipv6-options@ietf.org, draft-ioametal-ippm-6man-ioam-ipv6-deployment@ietf.org, IPPM Chairs <ippm-chairs@ietf.org>, Martin Duke <martin.h.duke@gmail.com>, "IETF IPPM WG (ippm@ietf.org)" <ippm@ietf.org>
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To: "Frank Brockners (fbrockne)" <fbrockne@cisco.com>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/ippm/GX1UxsCxv2UCxlXHchlE16Zk120>
Subject: Re: [ippm] Merging deployment considerations into IPv6 IOAM document
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Hi Frank, all,

Thanks for providing this update. The combined document makes sense and, I b=
elieve, will provide a more useful resource to implementors.=20

Looking through the new text, I had a few textual/editorial nits. Is this av=
ailable on a GitHub for comments or a PR?

Thanks,
Tommy

> On Sep 18, 2020, at 1:56 AM, Frank Brockners (fbrockne) <fbrockne@cisco.co=
m> wrote:
>=20
> =EF=BB=BFHi Tommy, IPPM WG,
>=20
> we just posted an updated draft-ietf-ippm-ioam-ipv6-options-03 which merge=
s draft-ioametal-ippm-6man-ioam-ipv6-deployment into draft-ietf-ippm-ioam-ip=
v6-options plus it reflects the WG discussion of the last IPPM meeting.
>=20
> The updates to draft-ietf-ippm-ioam-ipv6-options-03 are
>=20
> * implement the guidance from the WG chairs: Merge in draft-ioametal-ippm-=
6man-ioam-ipv6-deployment "as is", i.e. only editorial changes were made (e.=
g. resolve references which would have been circular).
> * implement the result of discussion in the last WG meeting: Removed the p=
aragraph that started with " In order for IOAM to work in IPv6 networks.." w=
hich included deployment considerations.
>=20
> Moving forward, we'll need to further evolve the deployment section (now s=
ection 4).=20
> There were already comments raised in the IOAM DT wrt/ what is now section=
 4.4.1 by Haoyu. I asked  Haoyu to take those to the IPPM list.=20
>=20
> Cheers, Frank
>=20
>> -----Original Message-----
>> From: Tommy Pauly <tpauly@apple.com>
>> Sent: Freitag, 14. August 2020 23:12
>> To: draft-ietf-ippm-ioam-ipv6-options@ietf.org; draft-ioametal-ippm-6man-=

>> ioam-ipv6-deployment@ietf.org
>> Cc: IPPM Chairs <ippm-chairs@ietf.org>; Martin Duke
>> <martin.h.duke@gmail.com>
>> Subject: Merging deployment considerations into IPv6 IOAM document
>>=20
>> Hi IOAM IPv6 authors,
>>=20
>> At IETF 108, we discussed draft-ietf-ippm-ioam-ipv6-options and draft-ioa=
metal-
>> ippm-6man-ioam-ipv6-deployment, and how to progress with the deployment
>> considerations. Since the hums showed no strong opinions one way or the o=
ther
>> in the WG, Ian and I have discussed and would prefer to see the deploymen=
t
>> considerations merged into the existing and adopted IPv6 options document=
.
>> Both documents are short, and readers will benefit from any discussion of=

>> deployment being available in the same document that defines the extensio=
n
>> header.
>>=20
>> Please post an update for draft-ietf-ippm-ioam-ipv6-options with this con=
tent
>> added when you have a chance!
>>=20
>> Thanks,
>> Tommy


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From: "Frank Brockners (fbrockne)" <fbrockne@cisco.com>
To: Tommy Pauly <tpauly@apple.com>
CC: "draft-ietf-ippm-ioam-ipv6-options@ietf.org" <draft-ietf-ippm-ioam-ipv6-options@ietf.org>, "draft-ioametal-ippm-6man-ioam-ipv6-deployment@ietf.org" <draft-ioametal-ippm-6man-ioam-ipv6-deployment@ietf.org>, IPPM Chairs <ippm-chairs@ietf.org>, Martin Duke <martin.h.duke@gmail.com>, "IETF IPPM WG (ippm@ietf.org)" <ippm@ietf.org>
Thread-Topic: Merging deployment considerations into IPv6 IOAM document
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Subject: Re: [ippm] Merging deployment considerations into IPv6 IOAM document
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