Hi Authors and Gorry*,

*Gorry - As the AD, please review and approve of the following update in 
Section 13.

Old:
   >> All options MUST indicate whether they can be used per-fragment
   and, if so, MUST also indicate how their success or failure is
   reported to the user. It is RECOMMENDED to support UDP Options for
   each fragment; it is also RECOMMENDED that options used for each
   fragment be reported to the user as a finite aggregate (e.g., a sum,
   a flag, etc.) rather than individually.

Current:
   >> All options MUST indicate whether they can be used per-fragment
   and, if so, MUST also indicate how their success or failure is
   reported to the user. It is RECOMMENDED that new options be designed
   to support per-fragment use; it is also RECOMMENDED that options used
   per-fragment be reported to the user as a finite aggregate (e.g., a sum, 
   a flag, etc.) rather than individually.

See this diff file:
https://www.rfc-editor.org/authors/rfc9868-lastdiff.html 


Authors - Thank you for sending the additional changes. We have updated the 
files accordingly.

> Finally, I see in the thread beginning with 
> https://mailarchive.ietf.org/arch/msg/auth48archive/VH0cX9X-owK3pzcKwjS1Dd9HWKs/
>  that RFC-to-be 9870 <draft-ietf-opsawg-tsvwg-udp-ipfix-14> has been approved 
> by the authors; does the RFC Editor intend to update the informative 
> reference [Bo24] to point to the published RFC instead of the draft? 

We have updated this reference to use the RFC number. RFCs-to-be 9868, 9869, 
and 9870 will be published at the same time. 

The files have been posted here (please refresh):
https://www.rfc-editor.org/authors/rfc9868.xml
https://www.rfc-editor.org/authors/rfc9868.txt
https://www.rfc-editor.org/authors/rfc9868.html
https://www.rfc-editor.org/authors/rfc9868.pdf

The relevant diff files have been posted here:
https://www.rfc-editor.org/authors/rfc9868-diff.html (comprehensive diff)
https://www.rfc-editor.org/authors/rfc9868-auth48diff.html (AUTH48 changes)
https://www.rfc-editor.org/authors/rfc9868-auth48rfcdiff.html (AUTH48 changes 
side by side)
https://www.rfc-editor.org/authors/rfc9868-lastdiff.html (last version to this 
one)
https://www.rfc-editor.org/authors/rfc9868-lastrfcdiff.html (rfcdiff between 
last version and this)

We will await any further changes you may have as well approvals from each 
author and *Gorry prior to moving this document forward in the publication 
process.

Thank you,
Alanna Paloma
RFC Production Center


> On Sep 22, 2025, at 5:16 PM, C. M. Heard <[email protected]> wrote:
> 
> Greetings everyone,
> 
> I ran the following change requests past Joe, and he stated that he agrees 
> with them but would like to have the opportunity for one more pass after the 
> changes are applied.
> 
> What's written below is divided into two parts: change requests on the 
> current review version, followed by proposed resolution to the option 
> capitalization question. Note that the detailed change requests in the first 
> part do NOT address the option capitalization question, so to the extent that 
> they are accepted, they need to be applied BEFORE option capitalization 
> changes are applied.
> 
> Also, allow me to point out (with apologies) that we had a change of heart 
> accepting as-is the RFC Editor's change to Section 13 to satisfy Gorry's 
> comment, so the list of detailed changes includes further editorial 
> suggestions that we think better capture the intended meaning. Gorry, please 
> look for "may require AD approval" and let us all know if you are OK with 
> this proposed change.
> 
> Finally, I see in the thread beginning with 
> https://mailarchive.ietf.org/arch/msg/auth48archive/VH0cX9X-owK3pzcKwjS1Dd9HWKs/
>  that RFC-to-be 9870 <draft-ietf-opsawg-tsvwg-udp-ipfix-14> has been approved 
> by the authors; does the RFC Editor intend to update the informative 
> reference [Bo24] to point to the published RFC instead of the draft? 
> 
> Section 4, last paragraph - please eliminate the acronym TE as was done in 
> Section 22.
> CURRENT:
> IPv6 Teredo extensions (TEs) [RFC4380] [RFC6081] use a similar inconsistency 
> between UDP and IPv6 packet lengths to support trailers, but in this case, 
> the values differ between the UDP header and an IPv6 length contained as the 
> payload of the UDP user data. This allows IPv6 trailers in the UDP user data 
> but has no relation to the surplus area discussed in this document.  As a 
> consequence, TEs are compatible with UDP Options.
> NEW:
> IPv6 Teredo extensions [RFC4380] [RFC6081] use a similar inconsistency 
> between UDP and IPv6 packet lengths to support trailers, but in this case, 
> the values differ between the UDP header and an IPv6 length contained as the 
> payload of the UDP user data. This allows IPv6 trailers in the UDP user data 
> but has no relation to the surplus area discussed in this document.  As a 
> consequence, Teredo extensions are compatible with UDP Options.
> 
> 
> Section 5, last paragraph: correct the citation (this was an error in the 
> submitted draft). Note that RFC 6864 is already present in the list of 
> Informative References.
> CURRENT
> Zero-length UDP packets have been used as "liveness" indicators (see Section 
> 5 of [RFC8085]), but such use is dangerous because they lack unique 
> identifiers (the IPv6 base header has none, and the IPv4 ID field is 
> deprecated for such use [RFC6994]).
> NEW
> Zero-length UDP packets have been used as "liveness" indicators (see Section 
> 5 of [RFC8085]), but such use is dangerous because they lack unique 
> identifiers (the IPv6 base header has none, and the IPv4 ID field is 
> deprecated for such use [RFC6864]).
> 
> 
> Section 10, revise formatting of Figure 5:
> CURRENT
>                 +--------+--------+-------
>                 |  Kind  | Length | (remainder of option...)
>                 +--------+--------+-------
> NEW
>                 +--------+--------+------------~~------------+
>                 |  Kind  | Length | (remainder of option...) |
>                 +--------+--------+------------~~------------+
> 
> 
> Section 10, first paragraph following Table 1, repair a "that" which has no 
> referent:
> CURRENT
> Options indicated by Kind values in the range 0..191 are known as SAFE 
> options because they do not interfere with use of that data by legacy 
> endpoints or when the option is unsupported.
> NEW
> Options indicated by Kind values in the range 0..191 are known as SAFE 
> options because they do not interfere with use of UDP user data by legacy 
> endpoints or when the option is unsupported.
> 
> 
> Section 11.4, shortly after Figure 12, correct the grammar:
> CURRENT
> >> The FRAG option MAY be used on a single fragment; in which case, the Frag. 
> >> Offset would be zero and the option would have the 12-byte format.
> NEW
> >> The FRAG option MAY be used on a single fragment; in this case, the Frag. 
> >> Offset would be zero and the option would have the 12-byte format.
> 
> 
> Section 11.7, first sentence, correct the grammar:
> CURRENT
> The echo Request (REQ, Kind=6) and echo Response (RES, Kind=7) options 
> provides UDP packet-level acknowledgments as a capability for
> NEW
> The echo Request (REQ, Kind=6) and echo Response (RES, Kind=7) options 
> provide UDP packet-level acknowledgments as a capability for
> 
> 
> Section 11.7, first paragraph after Figure 15, correct the grammar:
> CURRENT
> >> If the implementation includes a layer/library that produces and consumes 
> >> REQ/RES on behalf of the user/application, then that layer MUST be 
> >> disabled by default; in which case, REQ/RES are simply sent upon request 
> >> by the user/application and passed to it when received, as with most other 
> >> UDP Options.
> NEW
> >> If the implementation includes a layer/library that produces and consumes 
> >> REQ/RES on behalf of the user/application, then that layer MUST be 
> >> disabled by default; in this case, REQ/RES are simply sent upon request by 
> >> the user/application and passed to it when received, as with most other 
> >> UDP Options.
> 
> 
> Section 11.10, final paragraph, remove redundant word:
> CURRENT
> Assigned UDP Experimental IDs (ExIDs) are assigned from a combined TCP/UDP 
> ExID registry managed by IANA (see Section 26).  Assigned ExIDs can be used 
> in either the EXP or UEXP options (see Section 12.3 for the latter).
> NEW
> UDP Experimental IDs (ExIDs) are assigned from a combined TCP/UDP ExID 
> registry managed by IANA (see Section 26).  Assigned ExIDs can be used in 
> either the EXP or UEXP options (see Section 12.3 for the latter).
> 
> 
> Section 13, eighth paragraph, UNSAFE is no longer a single option (this 
> change is modulo resolution of the option capitalization question discussed 
> later):
> CURRENT
> >> At the sender, new options MUST NOT modify UDP packet content anywhere 
> >> outside their option field, excepting only those contained within the 
> >> UNSAFE option; areas that need to remain unmodified include the IP header, 
> >> IP options, UDP user data, and surplus area (i.e., other options).
> NEW
> >> At the sender, new options MUST NOT modify UDP packet content anywhere 
> >> outside their option field, excepting only UNSAFE options; areas that need 
> >> to remain unmodified include the IP header, IP options, UDP user data, and 
> >> surplus area (i.e., other options).
> 
> 
> Section 13, second-from-last paragraph, further edits from Mike, who 
> apologizes for changing his mind after indicating concurrence (may require AD 
> approval):
> CURRENT
> >> All options MUST indicate whether they can be used per-fragment and, if 
> >> so, MUST also indicate how their success or failure is reported to the 
> >> user.  It is RECOMMENDED to support UDP Options for each fragment; it is 
> >> also RECOMMENDED that options used for each fragment be reported to the 
> >> user as a finite aggregate (e.g., a sum, a flag, etc.) rather than 
> >> individually.
> NEW
> >> All options MUST indicate whether they can be used per-fragment and, if 
> >> so, MUST also indicate how their success or failure is reported to the 
> >> user.  It is RECOMMENDED that new options be designed to support 
> >> per-fragment use; it is also RECOMMENDED that options used per-fragment be 
> >> reported to the user as a finite aggregate (e.g., a sum, a flag, etc.) 
> >> rather than individually.
> 
> 
> Section 13, last two paragraphs, fix a formatting error (our apologies; this 
> was in the submitted I-D):
> CURRENT
> With one exception, UNSAFE options are used when UDP user data needs to be 
> modified:
> o    >> The FRAG option modifies UDP user data, splitting it across multiple 
> IP packets. UNSAFE options MAY modify the UDP user data, e.g., by encryption, 
> compression, or other transformations. All other (SAFE) options MUST NOT 
> modify the UDP user data.
> NEW
> With one exception, UNSAFE options are used when UDP user data needs to be 
> modified:
> >> The FRAG option modifies UDP user data, splitting it across multiple IP 
> >> packets. UNSAFE options MAY modify the UDP user data, e.g., by encryption, 
> >> compression, or other transformations. All other (SAFE) options MUST NOT 
> >> modify the UDP user data.
> 
> 
> Section 15, final paragraph, correct the grammar:
> CURRENT
> Similarly, APIs are not intended to provide user/application control over UDP 
> fragment boundaries on a per-packet basis; although, they are expected to 
> allow control over which options, including fragmentation, are enabled (or 
> disabled) on a per-packet basis.
> NEW
> Similarly, APIs are not intended to provide user/application control over UDP 
> fragment boundaries on a per-packet basis; they are, however, expected to 
> allow control over which options, including fragmentation, are enabled (or 
> disabled) on a per-packet basis.
> 
> 
> 
> Section 18, first paragraph, move citation of UDP-Lite RFC to the sentence 
> that discusses UDP-lite:
> CURRENT
> Such inconsistency has been utilized in UDP-Lite using a different transport 
> number. There are no known systems that use this inconsistency for UDP 
> [RFC3828].
> NEW
> Such inconsistency has been utilized in UDP-Lite using a different transport 
> number [RFC3828]. There are no known systems that use this inconsistency for 
> UDP.
> 
> 
> Section 18, third paragraph, remove unintended paragraph break (this was a 
> page break in the submitted draft; there was no break in the Word source):
> CURRENT
> One reported embedded device passes the entire IP datagram to the UDP 
> application layer.  Although this feature could enable application-layer UDP 
> Option processing, it would require that conventional UDP user applications 
> examine only the UDP user data.
>  This feature is also inconsistent with the UDP application interface 
> [RFC0768] [RFC1122].
> NEW
>  One reported embedded device passes the entire IP datagram to the UDP 
> application layer.  Although this feature could enable application-layer UDP 
> Option processing, it would require that conventional UDP user applications 
> examine only the UDP user data. This feature is also inconsistent with the 
> UDP application interface [RFC0768] [RFC1122].
> 
> 
> Regarding the as-yet unaddressed follow-up question:  
> We have one follow-up question. To reflect the capitalization of “UDP 
> Option”, should “option” in the terms below also be capitalized?
> 
> TCP option
> IP option
> SAFE option
> UNSAFE option
> FRAG option
> NOP option
> EOL option
> MRDS option
> MSS option
> MDS option
> RES option
> REQ option
> TIME option
> TS option
> EXP option
> UEXP option
> UENC option
> UCMP option
> AUTH option
> APC option
> JUNK option
> LITE option
> 
> Based on the practices in RFC 9293, we would say NO to capitalizing "option" 
> in the following specific expressions, which are outside the central subject 
> matter of RFC-to-be 9868,
> 
> TCP option
> IP option
> IPv4 option
> 
> and YES for all the others listed above plus the following variants:
> 
> Option Checksum (OCS) option
> Additional Payload Checksum (APC, Kind=2) option
> Fragmentation (FRAG, Kind=3) option
> Maximum Datagram Size (MDS, Kind=4) option
> TCP Maximum Segment Size (MSS) option
> Maximum Reassembled Datagram Size (MRDS, Kind=5) option
> echo Request (REQ, Kind=6) and echo Response (RES, Kind=7) options
> Timestamp (TIME, Kind=8) option
> TCP's Timestamp (TS) option
> Authentication (AUTH, Kind=9) option
> Experimental (EXP, Kind=127) option
> The length of the Experimental option
> UNSAFE Compression (UCMP, Kind=192) option
> UNSAFE Encryption (UENC, Kind=193) option
> UNSAFE Experimental (UEXP, Kind=254) option
> Authentication (AUTH) option
> UNSAFE Encryption (UENC) option
> UDP EXP (Section 11.10) or UEXP (Section 12.3) options
> 
> Thanks for your patience and hard work.
> 
> Mike Heard
> 
> On Fri, Sep 19, 2025 at 9:39 AM C. M. Heard <[email protected]> wrote:
> Greetings,
> 
> I concur with the change below. I am presently doing a thorough reading of 
> the document and will send updates after having cleared them with Joe. We 
> will provide an answer to the outstanding follow up question at that time.
> 
> Mike
> 
> On Fri, Sep 19, 2025 at 9:30 AM Alanna Paloma <[email protected]> 
> wrote:
> Hi Gorry,
> 
> Thank you for your reply. We’ve noted your approval on the AUTH48 status page:
> https://www.rfc-editor.org/auth48/rfc9868
> 
> Per your suggestion, we have updated the text as follows. Please review and 
> let us know if further updates are needed.
> 
>  Old:
>    It is RECOMMENDED that options be useful per-
>    fragment; it is also RECOMMENDED that options used per-fragment be
>    reported to the user as a finite aggregate (e.g., a sum, a flag,
>    etc.) rather than individually.
> 
> Current:
>    It is RECOMMENDED to support UDP Options for
>    each fragment; it is also RECOMMENDED that options used for each
>    fragment be reported to the user as a finite aggregate (e.g., a sum,
>    a flag, etc.) rather than individually.
> 
> ---
> The files have been posted here (please refresh):
> https://www.rfc-editor.org/authors/rfc9868.xml
> https://www.rfc-editor.org/authors/rfc9868.txt
> https://www.rfc-editor.org/authors/rfc9868.html
> https://www.rfc-editor.org/authors/rfc9868.pdf
> 
> The relevant diff files have been posted here:
> https://www.rfc-editor.org/authors/rfc9868-diff.html (comprehensive diff)
> https://www.rfc-editor.org/authors/rfc9868-auth48diff.html (AUTH48 changes)
> https://www.rfc-editor.org/authors/rfc9868-auth48rfcdiff.html (AUTH48 changes 
> side by side)
> https://www.rfc-editor.org/authors/rfc9868-lastdiff.html (last version to 
> this one)
> https://www.rfc-editor.org/authors/rfc9868-lastrfcdiff.html (rfcdiff between 
> last version and this)
> 
> Note that we are awaiting response from the authors to our follow-up question.
> 
> Thank you,
> Alanna Paloma
> RFC Production Center
> 
> > On Sep 18, 2025, at 12:32 AM, Gorry Fairhurst <[email protected]> wrote:
> > 
> > On 18/09/2025 00:02, Alanna Paloma wrote:
> >> Hi Authors and Gorry (AD)*,
> >> 
> >> *Gorry - As the AD, please review and approve of the following changes:
> >> - Section 11.4: added a 2119/8174 keyword
> >> - Section 13: updated usage of 2119/8174 keywords
> > 
> > Section 11.4: added a 2119/8174 keyword
> > - Approved.
> > 
> > Section 13: updated usage of 2119/8174 keywords
> > - Usage is approved, but I have concerns about one phrase:
> > 
> >     UPDATED TEXT: “It is RECOMMENDED that options be useful per-fragment”
> > 
> > This reads oddly around a requirement to be “useful”.  I think the intended 
> > meaning is OK, but the phrasing is wrong, and I think the recommendation is 
> > to support UDP options for each fragment.
> > 
> > ——
> > 
> > Best wishes,
> > 
> > Gorry
> > 
> > 
> > 
> >> See this diff file:
> >>  https://www.rfc-editor.org/authors/rfc9868-auth48diff.html
> >> 
> >> 
> >> Authors - Thank you for your reply.  We have updated as requested. Feel 
> >> free to do a full content review and let us know if any further changes 
> >> are needed.
> >> 
> >> We have one follow-up question. To reflect the capitalization of “UDP 
> >> Option”, should “option” in the terms below also be capitalized?
> >> 
> >> TCP option
> >> IP option
> >> SAFE option
> >> UNSAFE option
> >> FRAG option
> >> NOP option
> >> EOL option
> >> MRDS option
> >> MSS option
> >> MDS option
> >> RES option
> >> REQ option
> >> TIME option
> >> TS option
> >> EXP option
> >> UEXP option
> >> UENC option
> >> UCMP option
> >> AUTH option
> >> APC option
> >> JUNK option
> >> LITE option
> >> 
> >> ---
> >> The files have been posted here (please refresh):
> >>  https://www.rfc-editor.org/authors/rfc9868.xml
> >>  https://www.rfc-editor.org/authors/rfc9868.txt
> >>  https://www.rfc-editor.org/authors/rfc9868.html
> >>  https://www.rfc-editor.org/authors/rfc9868.pdf
> >> 
> >> The relevant diff files have been posted here:
> >>  https://www.rfc-editor.org/authors/rfc9868-diff.html (comprehensive diff)
> >>  https://www.rfc-editor.org/authors/rfc9868-auth48diff.html (AUTH48 
> >> changes)
> >>  https://www.rfc-editor.org/authors/rfc9868-auth48rfcdiff.html (AUTH48 
> >> changes side by side)
> >> 
> >> Please review the document carefully and contact us with any further 
> >> updates you may have.  Note that we do not make changes once a document is 
> >> published as an RFC.
> >> 
> >> We will await any further changes you may have and approvals from each 
> >> author and *Gorry prior to moving forward in the publication process.
> >> 
> >> For the AUTH48 status of this document, please see:
> >>  https://www.rfc-editor.org/auth48/rfc9868
> >> 
> >> Thank you,
> >> Alanna Paloma
> >> RFC Production Center
> >> 
> >>> On Sep 16, 2025, at 8:52 PM, C. M. Heard <[email protected]> wrote:
> >>> 
> >>> Greetings,
> >>> 
> >>> Joe and I have discussed the questions posed by the RFC Editor team; our 
> >>> responses are in-line below.
> >>> 
> >>> Note that neither of us has done a full review of all of the document 
> >>> content, and we still need to do that before we clear the document for 
> >>> publication. We leave it to the discretion of the RFC Editor team whether 
> >>> to make updated review products with the changes below before we do the 
> >>> full content review, or whether it is better for us to do the full 
> >>> content review now and provide a second list of changes. Please let us 
> >>> know.
> >>> 
> >>>>> GORRY, please note the question below directed to you concerning the 
> >>>>> stability of the proposed URL for [Zu20].
> >>> Mike Heard
> >>> (speaking for both Joe and myself)
> >>> 
> >>> On Thu, Sep 11, 2025 at 9:57 AM <[email protected]> wrote:
> >>> Authors,
> >>> 
> >>> While reviewing this document during AUTH48, please resolve (as necessary)
> >>> the following questions, which are also in the source file.
> >>> 
> >>> 1) <!-- [rfced] Mike, we note that your name appears as follows in the
> >>> Authors' Addresses section:
> >>>    C. M. (Mike) Heard (editor)
> >>> 
> >>> Is this how you prefer that it be displayed going forward?
> >>> 
> >>> Yes please.
> >>>  In your earlier RFCs, it has appeared as follows:
> >>>    C. M. Heard
> >>> 
> >>> In addition, we note that RFC 3637 displayed "C. M. Heard" in the document
> >>> header, while RFCs 3638 and 4181 used "C. Heard".  Please let us know you
> >>> preference, and we will use that in this document and any future RFCs.
> >>> -->
> >>> 
> >>> Let's use C. Heard in the document header. That will match RFCs 3638, 
> >>> 4181, and 4841.
> >>>  2) <!-- [rfced] Please insert any keywords (beyond those that appear in
> >>> the title) for use on https://www.rfc-editor.org/search. -->
> >>> 
> >>> We believe that the title has all the keywords that are needed.
> >>> 
> >>> 3) <!--[rfced] Text that is preceded with ">>" is not indented. Would you
> >>> like each instance to be indented, or may we update this text as follows?
> >>> 
> >>> Original:
> >>>    In this document, the characters ">>" preceding an indented line(s)
> >>>    indicates a statement using the key words listed above.
> >>> 
> >>> Perhaps:
> >>>    In this document, the characters ">>" preceding text
> >>>    indicate a statement using the key words listed above.
> >>> -->
> >>> 
> >>> Since these always occur at the start of a paragraph, we prefer:
> >>>    In this document, the characters ">>" at the beginning of a
> >>>    paragraph indicate a statement using the key words listed above.
> >>> 
> >>> 4) <!-- [rfced] Informative reference RFC 793 has been obsoleted by RFC
> >>> 9293.  We recommend replacing RFC 793 with RFC 9293.  However, if RFC 793
> >>> must be referenced, we suggest mentioning RFC 9293 (e.g., "most widely
> >>> known from TCP [RFC793], which has been obsoleted by [RFC9293]").  See
> >>> Section 4.8.6 of RFC 7322  ("RFC Style Guide").
> >>> 
> >>> Original:
> >>>    o  Socket pair - a pair of sockets defining a UDP exchange, defined
> >>>       by a remote socket and a local socket, each composed of an IP
> >>>       address and UDP port number (most widely known from TCP [RFC793])
> >>> -->
> >>> 
> >>> We agree. The new text should be:
> >>> o  Socket pair – a pair of sockets defining a UDP exchange, defined
> >>>    by a remote socket and a local socket, each composed of an IP
> >>>    address and UDP port number (most widely known from TCP [RFC793],
> >>>    which has been obsoleted by [RFC9293])
> >>> 
> >>> 5) <!--[rfced] We are having some difficulty understanding the intention
> >>> of "to ignore" in the sentence below. Should all UDP options that a
> >>> receiver does not recognize be ignored?  Please review and let us know how
> >>> this sentence may be clarified.
> >>> 
> >>> Original:
> >>>    o  UNSAFE options - UDP options that are not designed to be safe for
> >>>       a receiver that does not understand them to ignore.
> >>> -->
> >>> 
> >>> We propose:
> >>> o  UNSAFE options – UDP options that are not designed to be safely
> >>>       ignored by a receiver that does not understand them.  6) 
> >>> <!--[rfced] To avoid use of "required" and "require" in the same
> >>> sentence to improve readability, may we update "require" with "need"?
> >>> 
> >>> Original:
> >>>    Internet historians have suggested a number of possible
> >>>    reasons why the design of UDP includes this field, e.g., to support
> >>>    multiple UDP packets within the same IP datagram or to indicate the
> >>>    length of the UDP user data as distinct from zero padding required
> >>>    for systems that require writes that are not byte-aligned.
> >>> 
> >>> Perhaps:
> >>>    Internet historians have suggested a number of possible
> >>>    reasons why the design of UDP includes this field, e.g., to support
> >>>    multiple UDP packets within the same IP datagram or to indicate the
> >>>    length of the UDP user data as distinct from zero padding required
> >>>    for systems that need writes that are not byte-aligned.
> >>> -->
> >>> 
> >>> We would prefer:
> >>> Internet historians have suggested a number of possible reasons why the 
> >>> design of UDP includes this field, e.g., to support multiple UDP packets 
> >>> within the same IP datagram or to indicate the length of the UDP user 
> >>> data as distinct from zero padding required for systems that cannot write 
> >>> an arbitrary number of bytes of data.
> >>> 
> >>> 7) <!--[rfced] We are having difficulty parsing the second sentence below.
> >>> In particular, the meaning of "in the absence of these extensions" is
> >>> unclear. Please review and let us know how this text may be updated for
> >>> clarity.
> >>> 
> >>> Original:
> >>>    UDP options have been designed based on the following core
> >>>    principles. Each is an observation about (preexisting) UDP [RFC768]
> >>>    in the absence of these extensions that this document does not
> >>>    intend to change or a lesson learned from other protocol designs.
> >>> 
> >>> Perhaps:
> >>>    UDP options have been designed based on the following core
> >>>    principles. Each is an (preexisting) observation about UDP [RFC768]
> >>>    that this document does not intend to change or is a lesson learned
> >>>    from other protocol designs.
> >>> -->
> >>> 
> >>> We would prefer:
> >>> UDP options have been designed based on the following core principles. 
> >>> Each is an observation about preexisting behavior of UDP [RFC768] in the 
> >>> absence of these extensions that this document does not intend to change 
> >>> or a lesson learned from other protocol designs.
> >>>  8) <!--[rfced] In the Meaning column of Table 1, should "UCMP", "UENC",
> >>> and "UEXP" be updated to include "UNSAFE" to reflect their expansions in
> >>> Sections 12.1, 12.2, and 12.3, respectively?
> >>> 
> >>> Original:
> >>>    RESERVED for Compression (UCMP)
> >>>    ...
> >>>    RESERVED for Encryption (UENC)
> >>>    ...
> >>>    RFC 3692-style experiments (UEXP)
> >>> 
> >>> Perhaps:
> >>>    RESERVED for UNSAFE Compression (UCMP)
> >>>    ...
> >>>    RESERVED for UNSAFE Encryption (UENC)
> >>>    ...
> >>>    RFC 3692-style UNSAFE experiments (UEXP)
> >>> 
> >>> Note that "RFC 3692-style" has been updated to "RFC3692-style" (no space)
> >>> to match use in other RFCs.  We also updated some capitalization in the
> >>> meaning column.  If there are no objections, we will ask IANA to update
> >>> their registry accordingly.
> >>> -->
> >>> 
> >>> We agree with this suggestion.
> >>> 
> >>> 9) <!-- [rfced] The "UDP Option Kind Numbers" registry does not include
> >>> the asterisks that appear in Table 1 (see 
> >>> https://www.iana.org/assignments/udp/udp.xhtml#udp-options).  We believe 
> >>> this is an expected
> >>> difference between what appears in the RFC and the IANA registry, as the
> >>> asterisks are defined in the RFC and the IANA registry has a comparable
> >>> note about values 0-7.  Please confirm that this is correct.
> >>> -->
> >>> 
> >>> Yes, this is correct.
> >>>  10) <!--[rfced] Should "MUST be" also apply to "user data received sent 
> >>> to
> >>> the user"?
> >>> 
> >>> Original:
> >>>    If the
> >>>    user data is not empty, all UDP options MUST be silently ignored and
> >>>    the user data received sent to the user.
> >>> 
> >>> Perhaps:
> >>>    If the
> >>>    user data is not empty, all UDP options MUST be silently ignored and
> >>>    the user data received MUST be sent to the user.
> >>> -->
> >>> 
> >>> We agree with this change.
> >>>  11) <!--[rfced] As "RES" means "Response", should "RES response" be
> >>> updated to "RES option"?
> >>> 
> >>> Original:
> >>>    For example, an application needs to explicitly enable the generation
> >>>    of a RES response by DPLPMTUD when using UDP Options [Fa25].
> >>> 
> >>> Perhaps:
> >>>    For example, an application needs to explicitly enable the generation
> >>>    of a RES option by DPLPMTUD when using UDP Options [Fa25].
> >>> -->
> >>> 
> >>> We agree with this change.
> >>>  12) <!--[rfced] Should "UKind" be updated to simply be "Kind"? "UKind"
> >>> does not appear to be defined in this document.
> >>> 
> >>> Original:
> >>>    >> Receivers supporting UDP options MUST silently drop the UDP user
> >>>    data of the reassembled datagram if any fragment or the entire
> >>>    datagram includes an UNSAFE option whose UKind is not supported or
> >>>    if an UNSAFE option appears outside the context of a fragment or
> >>>    reassembled fragments.
> >>> -->
> >>> 
> >>> We agree with this change. "UKind" is a leftover from a previous approach 
> >>> ☹️
> >>>  13) <!--[rfced] To avoid repetition of "except" and "excepting" in the
> >>> same sentence to improve readability, may be update "excepting" to
> >>> "besides"?
> >>> 
> >>> Original:
> >>>    >> At the sender, new options MUST NOT modify UDP packet content
> >>>    anywhere except within their option field, excepting only those
> >>>    contained within the UNSAFE option...
> >>> 
> >>> Perhaps:
> >>>    >> At the sender, new options MUST NOT modify UDP packet content
> >>>    anywhere except within their option field, besides only those
> >>>    contained within the UNSAFE option...
> >>> -->
> >>> 
> >>> We would prefer:
> >>>>> At the sender, new options MUST NOT modify UDP packet content anywhere 
> >>>>> outside their option field, excepting only those contained within the 
> >>>>> UNSAFE option; areas that need to remain unmodified include the IP 
> >>>>> header, IP options, the UDP user data, and the surplus area (i.e., 
> >>>>> other options).
> >>> 14) <!--[rfced] As "RECOMMENDS" is not a 2119/8174 keyword, may we
> >>> rephrase this sentence to use "RECOMMENDED"?
> >>> 
> >>> Original:
> >>>    This document RECOMMENDS that options be
> >>>    useful per-fragment and also RECOMMENDS that options used per-
> >>>    fragment be reported to the user as a finite aggregate (e.g., a sum,
> >>>    a flag, etc.) rather than individually.
> >>> 
> >>> Perhaps B:
> >>>    It is RECOMMENDED that options be
> >>>    useful per-fragment; it is also RECOMMENDED that options used per-
> >>>    fragment be reported to the user as a finite aggregate (e.g., a sum,
> >>>    a flag, etc.) rather than individually.
> >>> -->
> >>> 
> >>> We are OK with the proposed change.
> >>> 
> >>> 15) <!--[rfced] For clarity, may we update "certain" with "some"?
> >>> 
> >>> Original:
> >>>    Note that only certain of the initially defined options violate
> >>>    these rules:
> >>> 
> >>> Perhaps:
> >>>    Note that only some of the initially defined options violate
> >>>    these rules:
> >>> -->
> >>> 
> >>> Given the context of the paragraph that follows, we would prefer:
> >>> With one exception, UNSAFE options are used when UDP user data needs to 
> >>> be modified:
> >>> 16) <!--[rfced] To avoid awkward hyphenation, may we rephrase
> >>> "non-'must-support' options" as follows?
> >>> 
> >>> Original:
> >>>    >> Non-"must-support" options MAY be ignored by receivers, if
> >>>    present, e.g., based on API settings.
> >>> 
> >>> Perhaps:
> >>>    >> Options that are not must-support options MAY be ignored by
> >>>    receivers, if present, e.g., based on API settings.
> >>> -->
> >>> 
> >>> We would prefer:
> >>>>> Options that are not “must-support” options MAY, if present, be ignored 
> >>>>> by receivers, based, e.g., on API settings.
> >>> 17) <!--[rfced] FYI - To improve readability, we have rephrased this
> >>> sentence and added quotes. Please review and let us know of any
> >>> objections.
> >>> 
> >>> Original:
> >>>    UDP options are no exception and here are
> >>>    specified as MUST NOT be altered in transit.
> >>> 
> >>> Current:
> >>>    UDP options are no exception and are
> >>>    specified here as "MUST NOT be altered in transit".
> >>> -->
> >>> 
> >>> We agree with this change.
> >>>  18) <!--[rfced] Would you like to add a citation for the claimed report
> >>> below? If so, please provide us with the reference information.
> >>> 
> >>> Additionally, may we change the first instance of "reported" to avoid "has
> >>> been reported ... to be reported"?  Perhaps "has been noted"?
> >>> 
> >>> Original:
> >>>    It has been reported that Alcatel-Lucent's "Brick" Intrusion
> >>>    Detection System has a default configuration that interprets
> >>>    inconsistencies between UDP Length and IP Length as an attack to be
> >>>    reported.  Note that other firewall systems, e.g., CheckPoint, use a
> >>>    default "relaxed UDP length verification" to avoid falsely
> >>>    interpreting this inconsistency as an attack.
> >>> -->
> >>> 
> >>> We are OK with the proposed change. Unfortunately, we do not have a 
> >>> citation.
> >>> 
> >>> 19) <!--[rfced] May we update "non-aware" to "unaware"?
> >>> 
> >>> Original:
> >>>    Some of the mechanisms in this document can generate more zero-
> >>>    length UDP packets for a UDP option aware endpoint than for a legacy
> >>>    (non-aware) endpoint (e.g., based some error conditions) and some
> >>>    can generate fewer (e.g., fragment reassembly).
> >>> -->
> >>> 
> >>> We prefer the phrase "(non-aware)" just be removed, as "legacy" already 
> >>> implies "not UDP option aware." There is also a typo to be fixed 
> >>> (s/based/based on/):
> >>> Some of the mechanisms in this document can generate more zero-length UDP 
> >>> packets for a UDP Option aware endpoint than for a legacy endpoint (e.g., 
> >>> based on some error conditions) and some can generate fewer (e.g., 
> >>> fragment reassembly).
> >>>  20) <!--[rfced] We note that "TCP Sharing" does not occur in RFC 9040, 
> >>> but
> >>> it does use "TCB sharing". In the sentence below, should "TCP Sharing"
> >>> be updated to "TCB sharing"?
> >>> 
> >>> Original:
> >>>    Some TCP connection parameters, stored in the TCP Control Block, can
> >>>    be usefully shared either among concurrent connections or between
> >>>    connections in sequence, known as TCP Sharing [RFC9040].
> >>> 
> >>> Perhaps:
> >>>    Some TCP connection parameters, stored in the TCP Control Block (TCB),
> >>>    can be usefully shared either among concurrent connections or between
> >>>    connections in sequence, known as TCB sharing [RFC9040].
> >>> -->
> >>> 
> >>> We agree with this change. "TCP Sharing" was a typo.
> >>>  21) <!--[rfced] We note that no other drafts, only RFCs, are mentioned
> >>> in Section 22. Therefore, may we update the section title as follows?
> >>> 
> >>> Original:
> >>>    22. Interactions with other RFCs (and drafts)
> >>> 
> >>> Perhaps:
> >>>    22. Interactions with Other RFCs
> >>> -->
> >>> 
> >>> We agree with this change.
> >>>  22) <!--[rfced] FYI - To clarify the quoted text, we have added the
> >>> following citation.
> >>> 
> >>> Original:
> >>>    TE defines the length
> >>>    of an IPv6 payload inside UDP as pointing to less than the end of
> >>>    the UDP payload, enabling trailing options for that IPv6 packet:
> >>> 
> >>>       "..the IPv6 packet length (i.e., the Payload Length value in
> >>>        the IPv6 header plus the IPv6 header size) is less than or
> >>>        equal to the UDP payload length (i.e., the Length value in
> >>>        the UDP header minus the UDP header size)"
> >>> 
> >>> Current (using blockquote):
> >>>    In [RFC6081], TE defines the length
> >>>    of an IPv6 payload inside UDP as pointing to less than the end of
> >>>    the UDP payload, enabling trailing options for that IPv6 packet:
> >>> 
> >>>    |  ...the IPv6 packet length (i.e., the Payload Length value in the
> >>>    |  IPv6 header plus the IPv6 header size) is less than or equal to
> >>>    |  the UDP payload length (i.e., the Length value in the UDP header
> >>>    |  minus the UDP header size)
> >>> -->
> >>> 
> >>> We are fine with the addition of this reference; however, upon 
> >>> reflection, we would prefer to eliminate the acronym TE. How about:
> >>> 
> >>> CURRENT:
> >>> Teredo extensions (TEs) define use of a similar difference between these 
> >>> lengths for trailers [RFC4380] [RFC6081].  In [RFC6081], TE defines the 
> >>> length of an IPv6 payload inside UDP as pointing to less than the end of 
> >>> the UDP payload, enabling trailing options for that IPv6 packet:
> >>> NEW:
> >>> Teredo extensions define use of a similar difference between these 
> >>> lengths for trailers [RFC4380] [RFC6081].  In [RFC6081], Teredo 
> >>> extensions define the length of an IPv6 payload inside UDP as pointing to 
> >>> less than the end of the UDP payload, enabling trailing options for that 
> >>> IPv6 packet:
> >>> 
> >>> 23) <!-- [rfced] This text has been (mostly) updated to match the note
> >>> that appears in the unified registry.  We say "mostly" because we will ask
> >>> IANA to update their registry to use "RFC 9896" instead of "the
> >>> corresponding reference".  Please review and let us know if any updates
> >>> are needed.
> >>> 
> >>> Original:
> >>>    IANA is also
> >>>    hereby requested to update the unified TCP/UDP ExID registry with
> >>>    the direction that "16-bit ExIDs can be used with either TCP or UDP;
> >>>    32-bit ExIDs can be used with TCP or their first 16 bits can be used
> >>>    with UDP", and with further detail provided below.
> >>> 
> >>> Current:
> >>>    IANA has added a note to the unified TCP/UDP
> >>>    ExID registry specifying the following:
> >>> 
> >>>    |  Note 16-bit ExIDs can be used with either TCP or UDP; 32-bit ExIDs
> >>>    |  can be used with TCP or their first 16 bits can be used with UDP.
> >>>    |  Use with each transport (TCP, UDP) is indicated in the protocol
> >>>    |  column, as defined in RFC 9868.
> >>> -->
> >>> 
> >>> The note to the registry looks good to us.
> >>>  24) <!-- [rfced] For clarity, may we update this sentence as follows?
> >>> 
> >>> Original:
> >>>    Values in the TCP/UDP ExID registry are to be assigned by IANA using
> >>>    first-come, first-served (FCFS) rules applied to both the ExID value
> >>>    and the acronym [RFC8126].
> >>> 
> >>> Perhaps:
> >>>   Values in the TCP/UDP ExID registry are to be assigned by IANA using
> >>>   the First Come First Served (FCFS) policy [RFC8126], which applies to
> >>>   both the ExID value and the acronym.
> >>> -->
> >>> 
> >>> We agree with this change.
> >>>  25) <!--[rfced] FYI - We've added a URL to this reference. Please review
> >>> and let us know of any objections.
> >>> 
> >>> Original:
> >>>    [Zu20]    Zullo, R., T. Jones, and G. Fairhurst, "Overcoming the
> >>>              Sorrows of the Young UDP Options," 2020 Network Traffic
> >>>              Measurement and Analysis Conference (TMA), IEEE, 2020.
> >>> 
> >>> Current:
> >>>    [Zu20]     Zullo, R., Jones, T., and G. Fairhurst, "Overcoming the
> >>>               Sorrows of the Young UDP Options", 4th Network Traffic
> >>>               Measurement and Analysis Conference (TMA), 2020,
> >>>               <https://dl.ifip.org/db/conf/tma/tma2020/tma2020-camera- 
> >>> paper70.pdf>.
> >>> -->
> >>> 
> >>> I have no objections, but Joe has concerns about the stability of this 
> >>> URL.
> >>> 
> >>> The responsible AD for this RFC-to-be, Gorry Fairhurst, is a co-author of 
> >>> that document; perhaps he can speak to that point.
> >>> 
> >>> 26) <!--[rfced] Terminology
> >>> 
> >>> a) Throughout the text, the following terminology appears to be used
> >>> inconsistently. May we update to use the term on the right to make it
> >>> consistent throughout the document?
> >>> 
> >>>  extended length > Extended Length
> >>>  option length > Option Length
> >>>  UDP length > UDP Length
> >>>  UDP option > UPD Option
> >>> 
> >>> We are OK with these changes.
> >>>  b) Throughout the text, the following terminology appears to be used
> >>> inconsistently. Please review these occurrences and let us know if/how 
> >>> they
> >>> may be made consistent.
> >>> 
> >>>  UDP Timestamp vs. UDP timestamp
> >>> -->
> >>> 
> >>> We believe that the usage is correct as is; the contexts are different. 
> >>> Section 11.4 says:
> >>> 
> >>> UDP fragmentation relies on a fragment expiration timer, which can be 
> >>> preset or could use a value computed using the UDP Timestamp option.
> >>> 
> >>> whereas Section 11.8 says:
> >>> 
> >>> UDP timestamps are modeled after TCP timestamps and have similar 
> >>> expectations. In particular, they are expected to follow these guidelines:
> >>> 
> >>> 27) <!--[rfced] Abbreviations
> >>> 
> >>> a) FYI - We have added expansions for the following abbreviations
> >>> per Section 3.6 of RFC 7322 ("RFC Style Guide"). Please review each
> >>> expansion in the document carefully to ensure correctness.
> >>> 
> >>>  Cyclic Redundancy Check (CRC)
> >>>  Datagram Congestion Control Protocol (DCCP)
> >>>  Effective MTU for Receiving (EMTU_R)
> >>>  Internet Small Computer System Interface (iSCSI)
> >>>  Path MTU (PMTU)
> >>>  Stream Control Transmission Protocol (SCTP)
> >>>  TCP Authentication Option Encryption (TCP-AO-ENC)
> >>> 
> >>> The following change is requested for the first use of EMTU_R:
> >>> 
> >>> Section 11.4, CURRENT:
> >>> The Fragmentation (FRAG, Kind=3) option supports UDP fragmentation and 
> >>> reassembly, which can be used to transfer UDP messages larger than 
> >>> allowed by the IP receive MTU (Effective MTU for Receiving (EMTU_R) 
> >>> [RFC1122]).
> >>> NEW:
> >>> The Fragmentation (FRAG, Kind=3) option supports UDP fragmentation and 
> >>> reassembly, which can be used to transfer UDP messages larger than 
> >>> allowed by the IP Effective MTU for Receiving (EMTU_R) [RFC1122].
> >>> 
> >>> The following change is requested for the first (and only) use TCP-AO-ENC:
> >>> 
> >>> Section 12.2, OLD:
> >>> UENC is expected to provide all of the services of the AUTH option 
> >>> (Section 11.9) and in addition to encrypt the UDP user data and some 
> >>> (e.g., later, in sequence) UDP options, in a similar manner as TCP 
> >>> Authentication Option Encryption (TCP-AO-ENC) [To18].
> >>> NEW:
> >>> UENC is expected to provide all of the services of the AUTH option 
> >>> (Section 11.9) and in addition to encrypt the UDP user data and some 
> >>> (e.g., later, in sequence) UDP options, in a similar manner as TCP 
> >>> Authentication Option Extension for Payload Encryption (TCP-AO-ENC) 
> >>> [To18].
> >>>  b) How should "MMS_S" be expanded?
> >>> 
> >>> Original:
> >>>    Suppose that MMS_S is the PMTU less the size of
> >>>    the IP header and the UDP header, i.e., the maximum UDP message size
> >>>    that can be successfully sent in a single UDP datagram if there are
> >>>    no IP options or extension headers and no UDP per-fragment options.
> >>> 
> >>> This was intended to be a local definition of the symbol MMS_S for use in 
> >>> the equation that follows the above paragraph, and it's used nowhere 
> >>> else. Just expanding it in the obvious way as Maximum Message Size for 
> >>> Sending (that's what it's mnemonic for) would result in some really weird 
> >>> text. What about the following edits to make it clear that we are 
> >>> defining a symbol, not using an acronym?
> >>> 
> >>> Section 11.6, CURRENT:
> >>> These parameters plus the Path MTU (PMTU) allow a sender to compute the 
> >>> size of the largest pre-fragmentation UDP packet that a receiver will 
> >>> guarantee to accept. Suppose that MMS_S is the PMTU less the size of the 
> >>> IP header and the UDP header, i.e., the maximum UDP message size that can 
> >>> be successfully sent in a single UDP datagram if there are no IP options 
> >>> or extension headers and no UDP per-fragment options.
> >>>  Then, the size of the largest pre-fragmentation UDP packet that the 
> >>> receiver will guarantee to accept is the smaller of the MRDS size and
> >>>  (MMS_S - 12) * (MRDS segs) - 2 - (Total Per-Frag IP/UDP Options) + 8
> >>> NEW:
> >>> These parameters plus the Path MTU (PMTU) allow a sender to compute the 
> >>> size of the largest pre-fragmentation UDP packet that a receiver will 
> >>> guarantee to accept. Define MMS_S as the PMTU less the size of the IP 
> >>> header and the UDP header, i.e., the maximum UDP message size that can be 
> >>> successfully sent in a single UDP datagram if there are no IP options or 
> >>> extension headers and no UDP per-fragment options. Then the size of the 
> >>> largest pre-fragmentation UDP packet that the receiver will guarantee to 
> >>> accept is the smaller of the MRDS size and
> >>>  (MMS_S - 12) * (MRDS segs) - 2 - (Total Per-Frag IP/UDP Options) + 8
> >>> 
> >>> c) We note that "TIME" is expanded as "Timestamps" and "Timestamp"
> >>> (plural and singular). How should it be updated for consistency?
> >>> 
> >>> Original:
> >>>    11.8. Timestamps (TIME)
> >>>    ...
> >>>    The Timestamp (TIME, Kind=8) option exchanges two four-byte unsigned
> >>>    timestamp fields.
> >>> 
> >>> Similarly, should "TS" be expanded as "Timestamp" or "Timestamps"
> >>> (singular or plural)?
> >>> 
> >>> Original:
> >>>    It serves a similar purpose to TCP's TS option
> >>>    [RFC7323], enabling UDP to estimate the round-trip time (RTT)
> >>>    between hosts.
> >>> -->
> >>> 
> >>> It should be singular ("Timestamp").
> >>>  28) <!--[rfced] To avoid redundant acronym expansions, should the
> >>> following instances be updated for simplicity?
> >>> 
> >>> a) APC checksums: If expanded, "APC checksum" would read as "Additional
> >>> Payload Checksum checksum".
> >>> 
> >>> Original:
> >>>    >> UDP packets with incorrect APC checksums SHOULD be passed to the
> >>>    application with an indication of APC failure.
> >>>    ...
> >>>    >> UDP packets with unrecognized APC lengths MUST receive the same
> >>>    treatment as UDP packets with incorrect APC checksums.
> >>> 
> >>> Perhaps:
> >>>    >> UDP packets with incorrect APCs SHOULD be passed to the
> >>>    application with an indication of APC failure.
> >>>    ...
> >>>    >> UDP packets with unrecognized APC lengths MUST receive the same
> >>>    treatment as UDP packets with incorrect APCs.
> >>> 
> >>> The option is called APC, but within the APC is a kind, a length, and a 
> >>> checksum field. We would therefore prefer:
> >>> 
> >>>    >> UDP packets with incorrect APC Option checksums fields SHOULD be 
> >>> passed to the
> >>>    application with an indication of APC Option checksum failure.
> >>>    ...
> >>>    >> UDP packets with unrecognized APC lengths MUST receive the same
> >>>    treatment as UDP packets with incorrect APC Option checksum fields.
> >>> 
> >>> b) MRDS size: If expanded, "MRDS size" would read "Maximum Reassembled
> >>> Datagram Size size".
> >>> 
> >>> Original:
> >>>    MRDS size is the UDP equivalent of IP's EMTU_R but the
> >>>    two are not related [RFC1122].
> >>> 
> >>> Perhaps:
> >>>    MRDS is the UDP equivalent of IP's EMTU_R but the
> >>>    two are not related [RFC1122].
> >>> 
> >>> We would prefer:
> >>> The MRDS size field is the UDP equivalent of IP’s EMTU_R, but the two are 
> >>> not related [RFC1122].
> >>> 
> >>> c) TSval value: If expanded, "TSval value" would read as "TS Value value".
> >>> 
> >>> Original:
> >>>    Received TSval and TSecr values are provided to the
> >>>    application, which can pass the TSval value to be used as TSecr on
> >>>    UDP messages sent in response (i.e., to echo the received TSval).
> >>> 
> >>> Perhaps:
> >>>    Received TSval and TSecr values are provided to the
> >>>    application, which can pass the TSval to be used as TSecr on
> >>>    UDP messages sent in response (i.e., to echo the received TSval).
> >>> -->
> >>> 
> >>> We would prefer:
> >>> Received TSval and TSecr field contents are provided to the application, 
> >>> which can pass the received TSval to be used as TSecr in UDP messages 
> >>> sent in response (i.e., to echo the received TSval).
> >>>  29) <!-- [rfced] Please review the "Inclusive Language" portion of the
> >>> online Style Guide 
> >>> <https://www.rfc-editor.org/styleguide/part2/#inclusive_language>
> >>> and let us know if any changes are needed.  Updates of this nature
> >>> typically result in more precise language, which is helpful for readers.
> >>> 
> >>> Note that our script did not flag any words in particular, but this should
> >>> still be reviewed as a best practice.
> >>> -->
> >>> 
> >>> 
> >>> Thank you.
> >>> 
> >>> Alanna Paloma and Sandy Ginoza
> >>> RFC Production Center
> >>> 
> >>> 
> >>> 
> >>> 
> >>> 
> >>> On Sep 11, 2025, at 9:49 AM, [email protected] wrote:
> >>> 
> >>> *****IMPORTANT*****
> >>> 
> >>> Updated 2025/09/11
> >>> 
> >>> RFC Author(s):
> >>> --------------
> >>> 
> >>> Instructions for Completing AUTH48
> >>> 
> >>> Your document has now entered AUTH48.  Once it has been reviewed and
> >>> approved by you and all coauthors, it will be published as an RFC.
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> >>> available as listed in the FAQ (https://www.rfc-editor.org/faq/).
> >>> 
> >>> You and you coauthors are responsible for engaging other parties
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> >>> your approval.
> >>> 
> >>> Planning your review
> >>> ---------------------
> >>> 
> >>> Please review the following aspects of your document:
> >>> 
> >>> *  RFC Editor questions
> >>> 
> >>>    Please review and resolve any questions raised by the RFC Editor
> >>>    that have been included in the XML file as comments marked as
> >>>    follows:
> >>> 
> >>>    <!-- [rfced] ... -->
> >>> 
> >>>    These questions will also be sent in a subsequent email.
> >>> 
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> >>> 
> >>>    Please ensure that you review any changes submitted by your
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> >>> 
> >>> *  Content
> >>> 
> >>>    Please review the full content of the document, as this cannot
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> >>>    - references
> >>> 
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> >>> 
> >>>    Please review the copyright notice and legends as defined in
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> >>> 
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> >>> 
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> >>> 
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> >>> 
> >>>    Please review the PDF, HTML, and TXT files to ensure that the
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> >>> 
> >>> 
> >>> Submitting changes
> >>> ------------------
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> >>> include:
> >>> 
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> >>> 
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> >>> 
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> >>> 
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> >>>         
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> >>> 
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> >>> 
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> >>> 
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> >>> 
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> >>> 
> >>> OLD:
> >>> old text
> >>> 
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> >>> new text
> >>> 
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> >>> beyond editorial in nature, e.g., addition of new text, deletion of text,
> >>> and technical changes.  Information about stream managers can be found in
> >>> the FAQ.  Editorial changes do not require approval from a stream manager.
> >>> 
> >>> 
> >>> Approving for publication
> >>> --------------------------
> >>> 
> >>> To approve your RFC for publication, please reply to this email stating
> >>> that you approve this RFC for publication.  Please use ‘REPLY ALL’,
> >>> as all the parties CCed on this message need to see your approval.
> >>> 
> >>> 
> >>> Files
> >>> -----
> >>> 
> >>> The files are available here:
> >>>    https://www.rfc-editor.org/authors/rfc9868.xml
> >>>    https://www.rfc-editor.org/authors/rfc9868.html
> >>>    https://www.rfc-editor.org/authors/rfc9868.pdf
> >>>    https://www.rfc-editor.org/authors/rfc9868.txt
> >>> 
> >>> Diff file of the text:
> >>>    https://www.rfc-editor.org/authors/rfc9868-diff.html
> >>>    https://www.rfc-editor.org/authors/rfc9868-rfcdiff.html (side by side)
> >>> 
> >>> Diff of the XML:
> >>>    https://www.rfc-editor.org/authors/rfc9868-xmldiff1.html
> >>> 
> >>> 
> >>> Tracking progress
> >>> -----------------
> >>> 
> >>> The details of the AUTH48 status of your document are here:
> >>>    https://www.rfc-editor.org/auth48/rfc9868
> >>> 
> >>> Please let us know if you have any questions.
> >>> 
> >>> Thank you for your cooperation,
> >>> 
> >>> RFC Editor
> >>> 
> >>> --------------------------------------
> >>> RFC 9868 (draft-ietf-tsvwg-udp-options-45)
> >>> 
> >>> Title            : Transport Options for UDP
> >>> Author(s)        : J. Touch, C. M. Heard, Ed.
> >>> WG Chair(s)      : Martin Duke, Zaheduzzaman Sarker
> >>> 
> >>> Area Director(s) : Gorry Fairhurst, Mike Bishop
> >> 
> > 
> 

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