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Versions: (draft-andersson-lsp-ping-registries-update) 00 01 02

MPLS Working Group                                          L. Andersson
Internet-Draft                                  Bronze Dragon Consulting
Updates: 8029, 8611 (if approved)                                T. Saad
Intended status: Standards Track                        Juniper Networks
Expires: March 6, 2020                                           M. Chen
                                                      Huawei Techologies
                                                            C. Pignataro
                                                           Cisco Systems
                                                       September 3, 2019


               Updating the IANA MPLS LSP Ping Parameters
           draft-andersson-mpls-lsp-ping-registries-update-02

Abstract

   This document updates RFC 8029 and RFC 8611 that define IANA
   registries for MPLS LSP Ping.  The updates are mostly for
   clarification and to align this registry with recent developments..

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at https://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on March 6, 2020.

Copyright Notice

   Copyright (c) 2019 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (https://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must



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   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Requirement Language  . . . . . . . . . . . . . . . . . .   3
   2.  Updating the Message Types, Reply Mode and Return Codes
       Registries  . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Updating the TLV and sub-TLV registries . . . . . . . . . . .   4
     3.1.  General principles the LSP Ping TLV and sub-TLV
           registries  . . . . . . . . . . . . . . . . . . . . . . .   5
       3.1.1.  Unrecognized Experimental and Private TLVs and sub-
               TLVs  . . . . . . . . . . . . . . . . . . . . . . . .   5
     3.2.  Changes to the LSP Ping registries  . . . . . . . . . . .   6
       3.2.1.  Common changes to the TLV and sub-TLV registries  . .   6
   4.  Security Considerations . . . . . . . . . . . . . . . . . . .   7
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   7
     5.1.  New Message Type, Reply Mode and Return Codes registries    7
     5.2.  Common Registration Procedures for TLVs and sub-TLVs  . .   8
     5.3.  IANA assignments for TLVs and sub-TLVs  . . . . . . . . .   8
   6.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   9
   7.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  10
     7.1.  Normative References  . . . . . . . . . . . . . . . . . .  10
     7.2.  Informative References  . . . . . . . . . . . . . . . . .  11
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  12

1.  Introduction

   When RFC 8029 [RFC8029] was published it contained among other things
   updates to the "Multiprotocol Label Switching (MPLS) Label Switched
   Paths (LSPs) Ping Parameters" IANA name space [IANA-LSP-PING].

   RFC 8611 [RFC8611] updated the LSP Ping IANA registries to match RFC
   8029, but the registrations can be further clarified and their
   definitions more precise.

   This document updates RFC 8029 [[RFC8029] and RFC 8611 [RFC8611] by
   updating two groups of registries.

   First the registries for Message Types [IANA-MT], Reply Modes
   [IANA-RM] and Return Codes [IANA-RC].  The changes to these
   registries are minor.

   Second, this document updates the TLV and sub-TLV registries.

   o  TLVs [IANA-TLV-reg]



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   o  Sub-TLVs for TLVs 1, 16 and 21 [IANA-Sub-1-16-21]

   o  Sub-TLVs for TLV 6 [IANA-Sub-6]

   o  Sub-TLVs for TLV 11 [IANA-Sub-11]

   o  Sub-TLVs for TLV 20 [IANA-Sub-20]

   o  Sub-TLVs for TLV 23 [IANA-Sub-23]

   o  Sub-TLVs for TLV 27 [IANA-Sub-27]

   The registry for sub-TLVs for TLV 9 [IANA-Sub-9] is not updated.

1.1.  Requirement Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
   "OPTIONAL" in this document are to be interpreted as described in BCP
   14 [RFC2119] [RFC8174] when, and only when, they appear in all
   capitals, as shown here.

2.  Updating the Message Types, Reply Mode and Return Codes Registries

   The following changes are made to the Message Types, Reply Modes and
   Return Codes [IANA-MT] registries.

   o  a small set of code points (4 code points) for experimental use is
      added, actually they are take from the range for "Private Use".

   o  the registration procedure "Specification Required" is changed to
      "RFC Required" and the note "Experimental RFC needed" is removed

   o  In the listing of assignments the term "Vendor Private Use" is
      changed to "Private Use"

   o  the registration procedures "Private Use" and "Experimental Use"
      are added to the table of registration procedures

   o  A note "Not to be assigned" is added for the registration
      procedures "Private Use" and "Experimental Use"

   o  In the list that capture the assignment status, the fields that
      are reserved, i.e.  0, Private Use and Experimental Use are
      clearly marked.






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      *  In the Return Codes [IANA-RC] registry the code point "0"
         already been assigned.  This assignment is not changed and this
         registry will not have the "0" value "Reserved".

   The new Registration Procedures layout and the new assignments for
   these registries will be found in Section 5.1.

3.  Updating the TLV and sub-TLV registries

   When a new LSP Ping sub-TLV registry were created by RFC 8611
   [RFC8611] this registry "Sub-TLVs for TLV Type 6" [IANA-Sub-6] was
   set up following the intentions of RFC 8029.

   The registry for "Sub-TLVs for TLV Type 6" will serve as a model to
   change/update the rest of the TLV and sub-TLV registries in this name
   space.

   The registration procedures in the current registry for "Sub-TLVs for
   TLV Type 6" looks like this (2019-06-20).  This will be used as a
   base-line and some additions/changes will be made as captured in the
   Appendixes:

   +-------------+-------------------+---------------------------------+
   | Range       | Registration      | Note                            |
   |             | Procedures        |                                 |
   +-------------+-------------------+---------------------------------+
   | 0-16383     | Standards Action  | This range is for mandatory     |
   |             |                   | TLVs or for optional TLVs that  |
   |             |                   | require an error message if not |
   |             |                   | recognized.                     |
   | 16384-31743 | RFC Required      | This range is for mandatory     |
   |             |                   | TLVs or for optional TLVs that  |
   |             |                   | require an error message if not |
   |             |                   | recognized.                     |
   | 31744-32767 | Private Use       | Not to be assigned              |
   | 32768-49161 | Standards Action  | This range is for optional TLVs |
   |             |                   | that can be silently dropped if |
   |             |                   | not recognized.                 |
   | 49162-64511 | RFC Required      | This range is for optional TLVs |
   |             |                   | that can be silently dropped if |
   |             |                   | not recognized.                 |
   | 64512-65535 | Private Use       | Not to be assigned              |
   +-------------+-------------------+---------------------------------+

              Sub-TLVs for TLV Type 6 Registration Procedures

   This document adds small ranges of code points for Experimental Use
   to this registry and to registries listed in Section 5.2.



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   All registries will be changed to reflect the same model.

3.1.  General principles the LSP Ping TLV and sub-TLV registries

   The following principles are valid for all the LSP Ping TLV and sub-
   TLV IANA registries

   o  all mandatory TLVs and sub-TLVs requires a response if the are not
      recognized

   o  some optional TLVs and sub-TLVs requires a response if the are not
      recognized

   o  some optional TLVs and sub-TLVs may be silently dropped if the are
      not recognized

   The range of each TLV and sub-TLV registry is divided into to blocks,
   one with a range from 0 to 49161 for TLVs and sub-TLVs that require a
   response if not recognized.  Another block in the range from 49161 to
   65535, this block is for TLVs and sub-TLVs that may be silently
   dropped if not recognized.

   Each of the blocks have code point spaces with the following
   registration procedures:

   o  Standards Action

   o  RFC Required

   o  Experimental Use

   o  Private Use

   The exact defintion of registration procedures for IANA registries
   are found in [RFC8126]

3.1.1.  Unrecognized Experimental and Private TLVs and sub-TLVs

   Unrecognized TLVs and sub-TLVs for Expereimetal USe and Privagte Use
   are handled as any other unrecognised TLV or sub-TLV.

   o  If the unrecognized TLV or sub-TLV is from the Experimental Use
      range (37144-37147) or from the Private Use range (31748-32767) a
      the Return Code of 2 ("One or more of the TLVs was not
      understood") will be sent in the echo response.






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   o  If the unrecognized TLV or sub-TLV is from the Experimental Use
      range (64512-64515) or from the Private Use range (64515-65535)
      the TLVs SHOULD be silently ignored.

   IETF does not prescribe how recognized or unrecognized Experimental
   Use and Private Use TLVs and sub-TLVs are handled in experimental or
   private networks, that is up to the agency running the experiment or
   the private network.  The statement above relates to how standard
   compliant implementations will treat the unrecognized TLVs and sub-
   TLVs from these ranges.

3.2.  Changes to the LSP Ping registries

   This section lists the changes to each MPLS LSP Ping Registry, in
   Section 5.1, Section 5.2 and Section 5.3 the changes are detailed and
   it is shown what the IANA registry version of the registration
   procedures and assignments would look like.

3.2.1.  Common changes to the TLV and sub-TLV registries

   The following changes are made to the TLV and sub-TLV registries.

   o  two small set of code points (2 times 4 code points) for
      experimental use is added, actually they are take from the range
      for "Private Use".

   o  the registration procedure "Specification Required" is changed to
      "RFC Required" and the note "Experimental RFC needed" is removed

   o  In the listing of assignements the term "Vendor Private Use" is
      changed to "Private Use"

   o  In the listing of assignments the range for "Experimental Use" is
      added

   o  the registration procedures "Private Use" and "Experimental Use"
      are added to the table of registration procedures

   o  A note "Not to be assigned" is added for the registration
      procedures "Experimental Use" and "Private Use"

   o  In the list that capture assignment status, the fields that are
      reserved, i.e.  0, Experimental Use and Private Use are clearly
      marked.

   The new Registration Procedures description and the new assignments
   for these registries will be found in Section 5.2 and Section 5.3.




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4.  Security Considerations

   TBA

5.  IANA Considerations

   IANA is requested to update the LSP Ping name space as described in
   this document and documented in the Appendixies.

5.1.  New Message Type, Reply Mode and Return Codes registries

   This section details the updated registration procedures for Message
   Type, Reply Mode and Return Codes registries.

   +---------+--------------------+------------------------------------+
   | Range   | Registration       | Note                               |
   |         | Procedures         |                                    |
   +---------+--------------------+------------------------------------+
   | 0-191   | Standards Action   |                                    |
   | 192-247 | RFC Required       |                                    |
   | 248-251 | Experimental Use   | Not to be assigned                 |
   | 252-255 | Private Use        | Not to be assigned                 |
   +---------+--------------------+------------------------------------+

                    New common registration procedures

   +---------+---------------------------------+-----------------------+
   | Value   | Meaning                         | Reference             |
   +---------+---------------------------------+-----------------------+
   | 0       | Reserved                        | This document         |
   | 1-247   | No changes to the existing      |                       |
   |         | assignments                     |                       |
   | 248-251 | Reserved for Experimental Use   | This document         |
   | 252-255 | Reserved for Private Use        | [RFC8029]             |
   +---------+---------------------------------+-----------------------+

   Common Assignments for the Message Types, Reply Mode and Return Code
                                registries

   Note that for the Return Code registry the assignment for code point
   zero has been previously assigned, it is not changed but will remain:










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   +-------+----------------------------------+------------------------+
   | Value | Meaning                          | Reference              |
   +-------+----------------------------------+------------------------+
   | 0     | No return code                   | [RFC8029]              |
   +-------+----------------------------------+------------------------+

          Assignment for code point 0 in the Return Code registry

5.2.  Common Registration Procedures for TLVs and sub-TLVs

   This section describes the new registration procedures for the TLV
   and sub-TLV registries.  The registry for sub-TLV 9 ([IANA-Sub-9] is
   not changed.

   +-------------+-------------------+---------------------------------+
   | Range       | Registration      | Note                            |
   |             | Procedures        |                                 |
   +-------------+-------------------+---------------------------------+
   | 0-16383     | Standards Action  | This range is for mandatory     |
   |             |                   | TLVs or for optional TLVs that  |
   |             |                   | require an error message if not |
   |             |                   | recognized.                     |
   | 16384-31743 | RFC Required      | This range is for mandatory     |
   |             |                   | TLVs or for optional TLVs that  |
   |             |                   | require an error message if not |
   |             |                   | recognized.                     |
   | 37144-37147 | Experimental Use  | Not to be assigned              |
   | 31748-32767 | Private Use       | Not to be assigned              |
   | 32768-49161 | Standards Action  | This range is for optional TLVs |
   |             |                   | that can be silently dropped if |
   |             |                   | not recognized.                 |
   | 49162-64511 | RFC Required      | This range is for optional TLVs |
   |             |                   | that can be silently dropped if |
   |             |                   | not recognized.                 |
   | 64512-64515 | Experimental Use  | Not to be assigned              |
   | 64515-65535 | Private Use       | Not to be assigned              |
   +-------------+-------------------+---------------------------------+

                  TLV and sub-TLV Registration Procedures

5.3.  IANA assignments for TLVs and sub-TLVs

   The two tables in this section describes the updated IANA assignments
   for the TLV and sub-TLV registries.  The registry for sub-TLV 9
   ([IANA-Sub-9] is not changed.






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   +-------------+-------------------+------------------+--------------+
   | Type        | TLV name          | Reference        | sub-TLV      |
   |             |                   |                  | registry     |
   +-------------+-------------------+------------------+--------------+
   | 0           | Reserved          | This document    |              |
   | 1-31743     | [any]             | No changes to    | [any]        |
   |             |                   | the current      |              |
   |             |                   | registry         |              |
   | 37144-37147 | Reserved for      | This document    | NA           |
   |             | Experimental Use  |                  |              |
   | 31748-32767 | Reserved for      | This document    | NA           |
   |             | Private Use       |                  |              |
   | 32768-64511 | [any]             | No changes to    | [any]        |
   |             |                   | the current      |              |
   |             |                   | registry.        |              |
   | 64512-64515 | Reserved for      | This document    | NA           |
   |             | Experimental Use  |                  |              |
   | 64515-65535 | Reserved for      | This document    | NA           |
   |             | Private Use       |                  |              |
   +-------------+-------------------+------------------+--------------+

                              TLV Assignments

   Updated Sub-TLV assignments

   +-------------+-------------------------------+---------------------+
   | Type        | TLV name                      | Reference           |
   +-------------+-------------------------------+---------------------+
   | 0           | Reserved                      | This document       |
   | 1-31743     | [any]                         | No changes to the   |
   |             |                               | current registry    |
   | 37144-37147 | Reserved for Experimental Use | This document       |
   | 31748-32767 | Reserved for Private Use      | This document       |
   | 32768-64511 | [any]                         | No changes to the   |
   |             |                               | current registry.   |
   | 64512-64515 | Reserved for Experimental Use | This document       |
   | 64515-65535 | Reserved for Private Use      | This document       |
   +-------------+-------------------------------+---------------------+

                            Sub-TLV Assignments

6.  Acknowledgements

   TBA







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7.  References

7.1.  Normative References

   [IANA-LSP-PING]
              "Multiprotocol Label Switching (MPLS) Label Switched Paths
              (LSPs) Ping Parameters",
              <https://www.iana.org/assignments/mpls-lsp-ping-
              parameters/mpls-lsp-ping-parameters.xhtml/>.

   [IANA-MT]  "Message Types", <https://www.iana.org/assignments/
              mpls-lsp-ping-parameters/
              mpls-lsp-ping-parameters.xhtml#message-types>.

   [IANA-RC]  "Return Codes", <https://www.iana.org/assignments/
              mpls-lsp-ping-parameters/#return-codes>.

   [IANA-RM]  "Reply Modes", <https://www.iana.org/assignments/
              mpls-lsp-ping-parameters/#reply-modes>.

   [IANA-Sub-1-16-21]
              "Sub-TLVs for TLV Types 1, 16, and 21",
              <https://www.iana.org/assignments/https://www.iana.org/
              assignments/mpls-lsp-ping-parameters/
              mpls-lsp-ping-parameters.xhtml#sub-tlv-1-16-21>.

   [IANA-Sub-11]
              "Sub-TLVs for TLV Type 11",
              <https://www.iana.org/assignments/mpls-lsp-ping-
              parameters/mpls-lsp-ping-parameters/
              mpls-lsp-ping-parameters.xhtml#sub-tlv-11>.

   [IANA-Sub-20]
              "Sub-TLVs for TLV Type 20",
              <https://www.iana.org/assignments/mpls-lsp-ping-
              parameters/mpls-lsp-ping-parameters/
              mpls-lsp-ping-parameters.xhtml#sub-tlv-20>.

   [IANA-Sub-23]
              "Sub-TLVs for TLV Type 23",
              <https://www.iana.org/assignments/mpls-lsp-ping-
              parameters/mpls-lsp-ping-parameters/
              mpls-lsp-ping-parameters.xhtml#sub-tlv-23>.








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   [IANA-Sub-27]
              "Sub-TLVs for TLV Type 27",
              <https://www.iana.org/assignments/mpls-lsp-ping-
              parameters/mpls-lsp-ping-parameters/
              mpls-lsp-ping-parameters.xhtml#sub-tlv-27>.

   [IANA-Sub-6]
              "Sub-TLVs for TLV Type 6",
              <https://www.iana.org/assignments/mpls-lsp-ping-
              parameters/mpls-lsp-ping-parameters/
              mpls-lsp-ping-parameters.xhtml#sub-tlv-6>.

   [IANA-TLV-reg]
              "TLVs", <https://www.iana.org/assignments/mpls-lsp-ping-
              parameters/mpls-lsp-ping-parameters.xhtml#tlvs>.

   [RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate
              Requirement Levels", BCP 14, RFC 2119,
              DOI 10.17487/RFC2119, March 1997,
              <https://www.rfc-editor.org/info/rfc2119>.

   [RFC8029]  Kompella, K., Swallow, G., Pignataro, C., Ed., Kumar, N.,
              Aldrin, S., and M. Chen, "Detecting Multiprotocol Label
              Switched (MPLS) Data-Plane Failures", RFC 8029,
              DOI 10.17487/RFC8029, March 2017,
              <https://www.rfc-editor.org/info/rfc8029>.

   [RFC8174]  Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC
              2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174,
              May 2017, <https://www.rfc-editor.org/info/rfc8174>.

   [RFC8611]  Akiya, N., Swallow, G., Litkowski, S., Decraene, B.,
              Drake, J., and M. Chen, "Label Switched Path (LSP) Ping
              and Traceroute Multipath Support for Link Aggregation
              Group (LAG) Interfaces", RFC 8611, DOI 10.17487/RFC8611,
              June 2019, <https://www.rfc-editor.org/info/rfc8611>.

7.2.  Informative References

   [IANA-Sub-9]
              "Sub-TLVs for TLV Type 9",
              <https://www.iana.org/assignments/mpls-lsp-ping-
              parameters/mpls-lsp-ping-parameters/
              mpls-lsp-ping-parameters.xhtml#sub-tlv-9>.







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   [RFC8126]  Cotton, M., Leiba, B., and T. Narten, "Guidelines for
              Writing an IANA Considerations Section in RFCs", BCP 26,
              RFC 8126, DOI 10.17487/RFC8126, June 2017,
              <https://www.rfc-editor.org/info/rfc8126>.

Authors' Addresses

   Loa Andersson
   Bronze Dragon Consulting

   Email: loa@pi.nu


   Tarek Saad
   Juniper Networks

   Email: tsaad.net@gmail.com


   Mach Chen
   Huawei Techologies

   Email: mach.chen@huawei.com


   Carlos Pignataro
   Cisco Systems

   Email: cpignata@cisco.com






















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