Internet DRAFT - draft-ietf-6man-ndpioiana
draft-ietf-6man-ndpioiana
Network Working Group O. Troan
Internet-Draft Cisco Systems
Updates: 4861 (if approved) April 30, 2018
Intended status: Standards Track
Expires: November 1, 2018
IANA Considerations for IPv6 Neighbor Discovery Prefix Information
Option Flags
draft-ietf-6man-ndpioiana-04
Abstract
The Prefix Information Option in the IPv6 Neighbor Discovery Router
Advertisement message defines an 8-bit flag field with two flags
defined and the remaining 6 bits reserved (Reserved1). RFC 6275 has
defined a new flag from this field without creating a IANA registry
or updating RFC 4861. The purpose of this document is to request a
new IANA registry for the PIO flags. This document updates RFC 4861.
Status of This Memo
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provisions of BCP 78 and BCP 79.
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This Internet-Draft will expire on November 1, 2018.
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1. Introduction
The Prefix Information Option (PIO) in the IPv6 Neighbor Discovery
Router Advertisement defines an 8-bit flag field with two flags
defined and the remaining 6 bits reserved (Reserved1). RFC 6275 has
defined a new flag from this field without creating a IANA registry
or updating RFC 4861. The purpose of this document is to to create a
new registry for the PIO flags.
2. Current Prefix Information Option flags
Currently, the Neighbor Discovery Protocol Prefix Information Option
[RFC4861] contains the following one-bit flags defined in published
RFCs:
0 1 2 3 4 5 6 7
+-+-+-+-+-+-+-+-+
|L|A|R|Reserved1|
+-+-+-+-+-+-+-+-+
Figure 1
L - On-link Flag [RFC4861]
A - Autonomous Address Configuration Flag [RFC4861]
R - Router Address Agent Flag [RFC6275]
Reserved1 - Reserved
3. Updates to RFC4861
This document updates Section 4.6.2 "Prefix Information" of [RFC4861]
to point to the new IANA registry that is created in this document.
Specifically: The current list of flags in the Prefix Information
Option can be found in IANA-TBD.
4. IANA Considerations
The IANA is requested to create a new registry for IPv6 Neighbor
Discovery Prefix Information Option flags. This should include the
current flags in the PIO option. The format for the registry is:
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+---------------+---------------------------------+-----------+
| RA Option Bit | Description | Reference |
+---------------+---------------------------------+-----------+
| 0 | L - On-link Flag | [RFC4861] |
| 1 | A - Autonomous Address | [RFC4861] |
| | Configuration Flag | |
| 2 | R - Router Address Flag | [RFC6275] |
| 3-7 | Reserved | |
+---------------+---------------------------------+-----------+
Figure 2
The assignment of new flags in the PIO option header require
Standards Action [RFC8126].
The registry for these flags should be added to:
http://www.iana.org/assignments/icmpv6-parameters
5. Security Considerations
This document has no security considerations.
6. Normative References
[RFC4861] Narten, T., Nordmark, E., Simpson, W., and H. Soliman,
"Neighbor Discovery for IP version 6 (IPv6)", RFC 4861,
DOI 10.17487/RFC4861, September 2007,
<https://www.rfc-editor.org/info/rfc4861>.
[RFC6275] Perkins, C., Ed., Johnson, D., and J. Arkko, "Mobility
Support in IPv6", RFC 6275, DOI 10.17487/RFC6275, July
2011, <https://www.rfc-editor.org/info/rfc6275>.
[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>.
Author's Address
Ole Troan
Cisco Systems
Philip Pedersens vei 1
Lysaker 1366
Norway
Email: ot@cisco.com
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