Authors (*Stafano),

Thank you for the approvals we have received thus far: we have marked them on 
the AUTH48 status page (see below).  We believe the only author approval 
outstanding is *Stefano’s.

Once we receive all author approvals, we will request that IANA update to match 
any relevant changes made during AUTH48 (same for RFC-to-be 9830; the update 
has already been requested for RFC-to-be 9832).  Once we receive confirmation 
of the registry/document matching for all documents in the cluster, we will 
move forward in the publication process.

 The files have been posted here:
  https://www.rfc-editor.org/authors/rfc9831.txt
  https://www.rfc-editor.org/authors/rfc9831.pdf
  https://www.rfc-editor.org/authors/rfc9831.html
  https://www.rfc-editor.org/authors/rfc9831.xml

 The relevant diff files have been posted here:
  https://www.rfc-editor.org/authors/rfc9831-diff.html (comprehensive)
  https://www.rfc-editor.org/authors/rfc9831-rfcdiff.html (side by side)

  https://www.rfc-editor.org/authors/rfc9831-auth48diff.html (AUTH48
changes only)
  https://www.rfc-editor.org/authors/rfc9831-auth48rfcdiff.html (side by side)

 The AUTH48 status page for this document can be found here:
  https://www.rfc-editor.org/auth48/rfc9831

 The relevant cluster information can be found here:
  https://www.rfc-editor.org/cluster_info.php?cid=C534

Thank you.

Megan Ferguson
RFC Production Center




> On Aug 26, 2025, at 1:46 AM, Clarence Filsfils (cfilsfil) 
> <[email protected]> wrote:
> 
> Hello,
> 
> I approve this document for publication.
> 
> Cheers,
> Clarence
> 
>> -----Original Message-----
>> From: Megan Ferguson <[email protected]>
>> Sent: Monday, August 25, 2025 17:53
>> To: Ketan Talaulikar <[email protected]>
>> Cc: RFC Editor <[email protected]>; Clarence Filsfils (cfilsfil)
>> <[email protected]>; [email protected]; [email protected];
>> [email protected]; [email protected]; [email protected];
>> [email protected]; Roman Danyliw <[email protected]>; auth48archive@rfc-
>> editor.org
>> Subject: Re: AUTH48: RFC-to-be 9831 <draft-ietf-idr-bgp-sr-segtypes-ext-08>
>> for your review
>> 
>> Hi Ketan,
>> 
>> Thank you for spotting that!  We have updated as requested (please refresh).
>> 
>> We have also marked you as “approved” at the AUTH48 status page (see
>> below).  Once we have approvals from your coauthors, we will forward the
>> necessary updates to IANA.
>> 
>>  The files have been posted here:
>>   https://www.rfc-editor.org/authors/rfc9831.txt
>>   https://www.rfc-editor.org/authors/rfc9831.pdf
>>   https://www.rfc-editor.org/authors/rfc9831.html
>>   https://www.rfc-editor.org/authors/rfc9831.xml
>> 
>>  The relevant diff files have been posted here:
>>   https://www.rfc-editor.org/authors/rfc9831-diff.html (comprehensive)
>>   https://www.rfc-editor.org/authors/rfc9831-rfcdiff.html (side by side)
>> 
>>   https://www.rfc-editor.org/authors/rfc9831-auth48diff.html (AUTH48
>> changes only)
>>   https://www.rfc-editor.org/authors/rfc9831-auth48rfcdiff.html (side by 
>> side)
>> 
>>  The AUTH48 status page for this document can be found here:
>>   https://www.rfc-editor.org/auth48/rfc9831
>> 
>>  The relevant cluster information can be found here:
>>   https://www.rfc-editor.org/cluster_info.php?cid=C534
>> 
>> Thank you.
>> 
>> Megan Ferguson
>> RFC Production Center
>> 
>>> On Aug 22, 2025, at 11:52 PM, Ketan Talaulikar <[email protected]>
>> wrote:
>>> 
>>> Hi Megan,
>>> 
>>> I had a look at the
>>> https://www.rfc-editor.org/authors/rfc9831-auth48diff.html and there
>>> is still this change that needs to be reverted in section 2.7
>>> 
>>>   SRv6 SID:  Optional.  A 16-octet IPv6 address.  The value 0 MAY be
>>>      used when the controller wants to indicate the desired SRv6
>>>      Endpoint Behavior
>>> or and SID Structure without specifying the SID.
>>> Besides that, everything looks good and please take this email as my
>> approval for publication.
>>> 
>>> Thanks,
>>> Ketan
>>> 
>>> 
>>> On Sat, Aug 23, 2025 at 1:35 AM Megan Ferguson <[email protected]
>> editor.org> wrote:
>>> Hi Ketan,
>>> 
>>> Thank you for your prompt reply!
>>> 
>>> We have updated as suggested and added these changes to the current
>> files/diffs (please refresh).
>>> 
>>>  The files have been posted here:
>>>   https://www.rfc-editor.org/authors/rfc9831.txt
>>>   https://www.rfc-editor.org/authors/rfc9831.pdf
>>>   https://www.rfc-editor.org/authors/rfc9831.html
>>>   https://www.rfc-editor.org/authors/rfc9831.xml
>>> 
>>>  The relevant diff files have been posted here:
>>>   https://www.rfc-editor.org/authors/rfc9831-diff.html (comprehensive)
>>>   https://www.rfc-editor.org/authors/rfc9831-rfcdiff.html (side by
>>> side)
>>> 
>>>   https://www.rfc-editor.org/authors/rfc9831-auth48diff.html (AUTH48
>> changes only)
>>>   https://www.rfc-editor.org/authors/rfc9831-auth48rfcdiff.html (side
>>> by side)
>>> 
>>>  The AUTH48 status page for this document can be found here:
>>>   https://www.rfc-editor.org/auth48/rfc9831
>>> 
>>>  The relevant cluster information can be found here:
>>>   https://www.rfc-editor.org/cluster_info.php?cid=C534
>>> 
>>> Please let us know if any further updates are necessary.  We will await
>> approvals from each party listed at the AUTH48 status page prior to moving
>> forward in the publication process.
>>> 
>>> Thank you.
>>> 
>>> RFC Editor/mf
>>> 
>>>> On Aug 22, 2025, at 2:30 AM, Ketan Talaulikar <[email protected]>
>> wrote:
>>>> 
>>>> Hi Megan,
>>>> 
>>>> Please check inline below for responses with KT2.
>>>> 
>>>> 
>>>> On Fri, Aug 22, 2025 at 12:23 AM Megan Ferguson <[email protected]
>> editor.org> wrote:
>>>> Hi Ketan,
>>>> 
>>>> Thank you for your response and guidance.
>>>> 
>>>> Some further questions/comments below marked with [rfced].
>>>> 
>>>>> 
>>>>> 4) <!-- [rfced] The following text from Section 2 may require
>>>>>     clarification:
>>>>> 
>>>>> "As specified in Sections 2.4.4 and 2.4.4.2 of [RFC9830],
>>>>> validation of an explicit path encoded by the Segment List sub-TLV
>>>>> is beyond the scope of BGP and performed by the Segment Routing
>>>>> Policy Module (SRPM) as described in Section 5 of [RFC9256]."
>>>>> 
>>>>> The term "Segment Routing Policy Module (SRPM)" doesn't appear in
>>>>> [RFC9256].
>>>>> 
>>>>> -->
>>>>> 
>>>>> KT> It should be RFC9830
>>>> 
>>>> [rfced] We believe the citation in the sentence following should be
>> updated as well (and have made the update).  Please review and let us know
>> if this is in error.
>>>> 
>>>> KT2> That 2nd sentence should refer to RFC9256 so please revert that
>> change to the original.
>>>> 
>>>> What is being referenced is the following text
>>>> https://www.rfc-editor.org/rfc/rfc9256.html#section-5.1
>>>> 
>>>> Additionally, an explicit candidate path MAY be declared invalid when its
>> constituent segment lists (valid or invalid) are using segment types of 
>> different
>> SR data planes.
>>>> 
>>>> 
>>>>> 
>>>>> 
>>>>> 
>>>>> 5) <!--[rfced] The following text led us to believe that the subsection
>>>>>     titles of Section 2 would match the Type names listed in Section
>>>>>     2 itself: but they do not.  Please review and let us know if a
>>>>>     closer 1:1 matchup is desired between these.
>>>>> 
>>>>> Original:
>>>>> [I-D.ietf-idr-sr-policy-safi] specifies Segment Type Sub-TLVs for
>>>>> the segment types A and B.  The following sub-sections specify the
>>>>> sub- TLVs used for encoding each of the other Segment Types above.
>>>>> 
>>>>> 
>>>>> KT> They look ok to me, but perhaps I don't follow your point. Could
>> you please illustrate with an example?
>>>>> 
>>>>> 
>>>>> -->
>>>> 
>>>> [rfced] Sorry for any confusion.  Just curious if the wording should be
>> made the same in the “names” of the Types.  We see:
>>>> 
>>>> Original ToC:
>>>>   2.  Segment Type Sub-TLVs . . . . . . . . . . . . . . . . . . . .   3
>>>>     2.1.  Segment Type C - SR-MPLS Prefix SID for IPv4  . . . . . .   4
>>>>     2.2.  Segment Type D - SR-MPLS Prefix SID for IPv6  . . . . . .   5
>>>>     2.3.  Segment Type E - SR-MPLS Adjacency SID for IPv4 with an
>>>>            Interface ID . . . . . . . . . . . . . . . . . . . . . .   5
>>>>     2.4.  Segment Type F - SR-MPLS Adjacency SID for IPv4 with an
>>>>            Interface Address  . . . . . . . . . . . . . . . . . . .   6
>>>>     2.5.  Segment Type G - SR-MPLS Adjacency SID for IPv6 with an
>>>>            Interface ID . . . . . . . . . . . . . . . . . . . . . .   7
>>>>     2.6.  Segment Type H - SR-MPLS Adjacency SID for IPv6 with an
>>>>            Interface Address  . . . . . . . . . . . . . . . . . . .   9
>>>>     2.7.  Segment Type I - SRv6 END SID as IPv6 Node Address  . . .   9
>>>>     2.8.  Segment Type J - SRv6 END.X SID as an Interface ID  . . .  11
>>>>     2.9.  Segment Type K - SRv6 END.X SID as an Interface
>>>>            Address  . . . . . . . . . . . . . . . . . . . . . . . .
>>>> 12
>>>> 
>>>> Original list in Section 2:
>>>>   Type  A: SR-MPLS Label
>>>>   Type  B: SRv6 SID
>>>>   Type  C: IPv4 Prefix with optional SR Algorithm
>>>>   Type  D: IPv6 Global Prefix with optional SR Algorithm for SR-MPLS
>>>>   Type  E: IPv4 Prefix with Local Interface ID
>>>>   Type  F: IPv4 Addresses for link endpoints as Local, Remote pair
>>>>   Type  G: IPv6 Prefix and Interface ID for link endpoints as Local,
>>>>            Remote pair for SR-MPLS
>>>>   Type  H: IPv6 Addresses for link endpoints as Local, Remote pair
>>>>            for SR-MPLS
>>>>   Type  I: IPv6 Global Prefix with optional SR Algorithm for SRv6
>>>>   Type  J: IPv6 Prefix and Interface ID for link endpoints as Local,
>>>>            Remote pair for SRv6
>>>>   Type  K: IPv6 Addresses for link endpoints as Local, Remote pair
>>>>            for SRv6
>>>> 
>>>> 
>>>> Perhaps the section titles of Section 2’s subsections should be updated as
>> follows to match their descriptions in the ToC above (or vice versa (with the
>> list in Section 2 being updated to match the styling in the original ToC))?
>>>> 
>>>> For example, make the section titles be:
>>>>     2.1.  Segment Type C: IPv4 Prefix with Optional SR Algorithm
>>>>     2.2.  Segment Type D: IPv6 Global Prefix with Optional SR Algorithm for
>> SR-MPLS
>>>>     2.3.  Segment Type E: IPv4 Prefix with Local Interface ID
>>>>     2.4.  Segment Type F: IPv4 Addresses for Link Endpoints as Local,
>> Remote Pair
>>>>     2.5.  Segment Type G: IPv6 Prefix and Interface ID for Link Endpoints 
>>>> as
>> Local, Remote Pair for SRMPLS
>>>>     2.6.  Segment Type H: IPv6 Addresses for Link Endpoints as Local,
>> Remote Pair for SR-MPLS
>>>>     2.7.  Segment Type I: IPv6 Global Prefix with Optional SR Algorithm for
>> SRv6
>>>>     2.8.  Segment Type J: IPv6 Prefix and Interface ID for Link Endpoints 
>>>> as
>> Local, Remote Pair for IPv6
>>>>     2.9.  Segment Type K: IPv6 for Link Endpoints as Local, Remote
>>>> Pair for SRv6
>>>> 
>>>> 
>>>> If this close of a relationship is not necessary/desired, it is fine to 
>>>> leave
>> them as they are.
>>>> 
>>>> KT2> I see your point. However, now that you bring this up, the section
>> titles seem too long. How about we just have "Segment Type X" and then it
>> would be consistent with https://www.rfc-
>> editor.org/authors/rfc9830.html#section-2.4.4.2.1 as well and much shorter?
>>>> 
>>>> 
>>>> 
>>>> 
>>>> 
>>>>> 
>>>>> 
>>>>> 7) <!-- [rfced] We note that Section 2.4.4.2.4 of [RFC9830] uses the term
>>>>>     "SRv6 SID Endpoint Behavior and Structure" rather than "SRv6
>>>>>     Endpoint Behavior and SID Structure".  Please let us know if/how
>>>>>     these uses may be made consistent.
>>>>> -->
>>>>> 
>>>>> KT> I would prefer the latter, but then we'll also need to make it
>>>>> KT> consistent in RFC9830 (e.g.,
>>>>> KT> https://www.rfc-editor.org/authors/rfc9830.html#section-2.4.4.
>>>>> KT> 2.4 )
>>>>> 
>>>> [rfced] We have updated to use the latter throughout this document and
>> consistently throughout RFC-to-be 9830.  Please review the use in both
>> documents (as an author of each) and reply to each specific email thread
>> with any further updates and/or approval of the changes.  Note that we also
>> changed some instances in which “or” was used instead of “and” to be “and”
>> consistently.  Please let us know if this was in error.
>>>> 
>>>> KT2> The changes where the "or" was replaced by "and" are incorrect. In
>> those cases, we mean that when either the "SRv6 Endpoint Behavior" or "SID
>> Structure" then the SID can be set to 0. Please revert that change. The rest
>> looks good to me.
>>>> 
>>>>> 
>>>>> 
>>>>> 8) <!--[rfced] Please review the entries in Table 1 in light of this 
>>>>> response
>> regarding the names of sub-TLVs from Ketan when we discussed this topic for
>> RFC-to-be 9830:
>>>>> 
>>>>> Ketan:
>>>>> "The names of the segments (titles) are to be "Segment Type X" while
>> the name of the sub-TLVs are to be "Type X Segment sub-TLV" (I've seen both
>> sub-TLV and Sub-TLV - either is OK but we should have been consistent). The
>> "Type-1" is actually "Type A Segment sub-TLV"."
>>>>> 
>>>>> If updates are necessary to the corresponding IANA registry, we
>>>>> will communicate them on your behalf once AUTH48 concludes.
>>>>> 
>>>>> KT> Yes, please apply the same to this document as well for
>>>>> KT> consistency. However, I notice that the IANA sections in both
>>>>> KT> 9830 and 9831 are not matching the sub-TLV names. Could you
>>>>> KT> please fix that?
>>>>> KT> https://www.rfc-editor.org/authors/rfc9830.html#section-6.5
>>>>> 
>>>>> 
>>>>> 
>>>>> —>
>>>> [rfced] We have made the necessary updates to Table 1 and will
>> communicate these changes to IANA once AUTH48 completes.
>>>> 
>>>> With regard to RFC-to-be 9830: We believe you are referring to values 1
>> and 13 in Table 5 (of Section 6.5) and have updated the document and will
>> communicate this change to IANA along with the changes to this document
>> (once AUTH48 for RFC-to-be 9831 concludes).
>>>> 
>>>> KT2> Correct.
>>>> 
>>>> 
>>>> 
>>>> We ask again that you review the changes to RFC 9830 and communicate
>> your approval or need for further updates in that email thread (for other
>> authors’ benefit as well as the AUTH48 archive).
>>>> 
>>>> KT2> Done.
>>>> 
>>>> Thanks,
>>>> Ketan
>>>> 
>>>> 
>>>> Any other changes have been incorporated as requested.  Please review
>> carefully as we do not make changes once the document is published as an
>> RFC.
>>>> 
>>>>  The files have been posted here:
>>>>   https://www.rfc-editor.org/authors/rfc9831.txt
>>>>   https://www.rfc-editor.org/authors/rfc9831.pdf
>>>>   https://www.rfc-editor.org/authors/rfc9831.html
>>>>   https://www.rfc-editor.org/authors/rfc9831.xml
>>>> 
>>>>  The relevant diff files have been posted here:
>>>>   https://www.rfc-editor.org/authors/rfc9831-diff.html (comprehensive)
>>>>   https://www.rfc-editor.org/authors/rfc9831-rfcdiff.html (side by
>>>> side)
>>>> 
>>>>   https://www.rfc-editor.org/authors/rfc9831-auth48diff.html (AUTH48
>> changes only)
>>>>   https://www.rfc-editor.org/authors/rfc9831-auth48rfcdiff.html
>>>> (side by side)
>>>> 
>>>>  The AUTH48 status page for this document can be found here:
>>>>   https://www.rfc-editor.org/auth48/rfc9831
>>>> 
>>>>  The relevant cluster information can be found here:
>>>>   https://www.rfc-editor.org/cluster_info.php?cid=C534
>>>> 
>>>> Thank you.
>>>> 
>>>> RFC Editor/mf
>>>> 
>>>> 
>>>> 
>>>> 
>>>> 
>>> 
> 

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