Internet DRAFT - draft-ietf-lisp-vendor-lcaf
draft-ietf-lisp-vendor-lcaf
LISP Working Group A. Rodriguez-Natal
Internet-Draft Cisco
Updates: 8060 (if approved) V. Ermagan
Intended status: Experimental Google
Expires: 7 January 2023 A. Smirnov
V. Ashtaputre
Cisco
D. Farinacci
lispers.net
6 July 2022
Vendor Specific LISP Canonical Address Format (LCAF)
draft-ietf-lisp-vendor-lcaf-12
Abstract
This document describes a new Locator/ID Separation Protocol (LISP)
Canonical Address Format (LCAF), the Vendor Specific LCAF. This LCAF
enables organizations to have implementation-specific encodings for
LCAF addresses. This document updates RFC8060.
Status of This Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
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This Internet-Draft will expire on 7 January 2023.
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Please review these documents carefully, as they describe your rights
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and restrictions with respect to this document. Code Components
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Requirements Notation . . . . . . . . . . . . . . . . . . . . 2
3. Unrecognized LCAF types . . . . . . . . . . . . . . . . . . . 2
4. Vendor Specific LCAF . . . . . . . . . . . . . . . . . . . . 3
5. Security Considerations . . . . . . . . . . . . . . . . . . . 4
6. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 4
7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 4
8. Normative References . . . . . . . . . . . . . . . . . . . . 4
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 5
1. Introduction
The LISP Canonical Address Format (LCAF) [RFC8060] defines the format
and encoding for different address types that can be used on LISP
[I-D.ietf-lisp-rfc6830bis] [I-D.ietf-lisp-rfc6833bis] deployments.
However, certain deployments require specific format encodings that
may not be applicable outside of the use-case for which they are
defined. This document extends [RFC8060] to introduce a Vendor
Specific LCAF that defines how organizations can create LCAF
addresses to be used only on particular LISP implementations. This
document also updates [RFC8060] to specify the behavior when
receiving unrecognized LCAF Types.
2. Requirements Notation
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.
3. Unrecognized LCAF types
[RFC8060] does not explain how an implementation should handle
unrecognized LCAF Type. This document updates [RFC8060] to specify
that any unrecognized LCAF Type received in a LISP control plane
message MUST be ignored. If all Locators are ignored, this is
equivalent to a LISP control message with Locator Count = 0, as
described in [I-D.ietf-lisp-rfc6833bis]. If an EID-Prefix only
contains unrecognized LCAF Types, the LISP control message MUST be
dropped and the event MUST be logged.
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4. Vendor Specific LCAF
The Vendor Specific LCAF relies on using the IEEE Organizationally
Unique Identifier (OUI) [IEEE.802] to prevent collisions across
vendors or organizations using the LCAF. The format of the Vendor
Specific LCAF is provided below.
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| AFI = 16387 | Rsvd1 | Flags |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type = TBD | Rsvd2 | Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Rsvd3 | Organizationally Unique Identifier (OUI) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Internal format... |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Figure 1: Vendor Specific LCAF
The fields in the first 8 octets of the above Vendor Specific LCAF
are actually the fields defined in the general LCAF format specified
in [RFC8060]. The "Type" field MUST be set to the value assigned by
IANA to indicate that this is a Vendor Specific LCAF (255 is
recommended, see Section 7). The Length field has to be set
accordingly to the length of the internal format plus the OUI plus
the Rsvd3 fields as for [RFC8060]. The fields defined by the Vendor
Specific LCAF are:
Rsvd3: This 8-bit field is reserved for future use. It MUST be
set to 0 on transmit and MUST be ignored on receipt.
Organizationally Unique Identifier (OUI): This is a 24-bit field
that carries an OUI or CID (Company ID) assigned by the IEEE
Registration Authority (RA) as defined by the IEEE Std 802
[IEEE.802]
Internal format: This is a variable length field that is left
undefined on purpose. Each vendor or organization can define its
own internal format(s) to use with the Vendor Specific LCAF.
The Vendor Specific LCAF type SHOULD NOT be used in deployments where
different organizations interoperate. However, there may be cases
where two (or more) organizations share a common deployment on which
they explicitly and mutually agree to use a particular Vendor
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Specific LCAF. In that case, the organizations involved need to
carefully assess the interoperability concerns for that particular
deployment. It is NOT RECOMMENDED to use an OUI not assigned to an
organization.
If a LISP device receives a LISP message containing a Vendor Specific
LCAF with an OUI that it does not understand, it MUST drop the
message and it SHOULD create a log message.
5. Security Considerations
This document enables organizations to define new LCAFs for their
internal use. It is the responsibility of these organizations to
properly assess the security implications of the formats they define.
Security considerations from [RFC8060] apply to this document.
6. Acknowledgments
The authors would like to thank Joel Halpern, Luigi Iannone, and
Alvaro Retana for their suggestions and guidance regarding this
document.
7. IANA Considerations
Following the guidelines of [RFC8126], IANA is asked to assign a
value (255 is suggested) for the Vendor Specific LCAF from the "LISP
Canonical Address Format (LCAF) Types" registry (defined in
[RFC8060]) as follows:
+=========+=====================+============================+
| Value # | LISP LCAF Type Name | Reference |
+=========+=====================+============================+
| TBD | Vendor Specific | [This Document], Section 4 |
+---------+---------------------+----------------------------+
Table 1: Vendor Specific LCAF assignment
8. Normative References
[I-D.ietf-lisp-rfc6830bis]
Farinacci, D., Fuller, V., Meyer, D., Lewis, D., and A.
Cabellos, "The Locator/ID Separation Protocol (LISP)",
Work in Progress, Internet-Draft, draft-ietf-lisp-
rfc6830bis-38, 7 May 2022,
<https://www.ietf.org/archive/id/draft-ietf-lisp-
rfc6830bis-38.txt>.
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[I-D.ietf-lisp-rfc6833bis]
Farinacci, D., Maino, F., Fuller, V., and A. Cabellos,
"Locator/ID Separation Protocol (LISP) Control-Plane",
Work in Progress, Internet-Draft, draft-ietf-lisp-
rfc6833bis-31, 2 May 2022,
<https://www.ietf.org/archive/id/draft-ietf-lisp-
rfc6833bis-31.txt>.
[IEEE.802] IEEE, "IEEE Standard for Local and Metropolitan Area
Networks: Overview and Architecture",
DOI 10.1109/IEEESTD.2014.6847097, IEEE Std 802, 1 July
2014, <https://ieeexplore.ieee.org/document/6847097>.
[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>.
[RFC8060] Farinacci, D., Meyer, D., and J. Snijders, "LISP Canonical
Address Format (LCAF)", RFC 8060, DOI 10.17487/RFC8060,
February 2017, <https://www.rfc-editor.org/info/rfc8060>.
[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>.
[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>.
Authors' Addresses
Alberto Rodriguez-Natal
Cisco
Spain
Email: natal@cisco.com
Vina Ermagan
Google
United States of America
Email: ermagan@gmail.com
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Anton Smirnov
Cisco
Diegem
Belgium
Email: asmirnov@cisco.com
Vrushali Ashtaputre
Cisco
San Jose, CA
United States of America
Email: vrushali@cisco.com
Dino Farinacci
lispers.net
San Jose, CA
United States of America
Email: farinacci@gmail.com
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