Internet DRAFT - draft-troan-6man-ndpioiana
draft-troan-6man-ndpioiana
Network Working Group O. Troean
Internet-Draft Cisco Systems
Updates: rfc4861 (if approved) September 19, 2017
Intended status: Standards Track
Expires: March 23, 2018
IPv6 ND PIO Flags IANA considerations
draft-troan-6man-ndpioiana-01
Abstract
The Prefix Information Option in the IPv6 Neighbor Discovery Router
Advertisement defines an 8-bit flag field with two flags defined and
the remaining 6 bits reservered (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 IANA to create
a new registry for the PIO flags to avoid potential conflict in the
use of these flags.
Status of This Memo
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This Internet-Draft will expire on March 23, 2018.
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Current Prefix Information Option flags . . . . . . . . . . . 2
3. Updates to RFC4861 . . . . . . . . . . . . . . . . . . . . . 3
4. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 3
5. References . . . . . . . . . . . . . . . . . . . . . . . . . 3
5.1. Normative References . . . . . . . . . . . . . . . . . . 3
5.2. Informative References . . . . . . . . . . . . . . . . . 4
Author's Address . . . . . . . . . . . . . . . . . . . . . . . . 4
1. Introduction
The Prefix Information Option in the IPv6 Neighbor Discovery Router
Advertisement defines an 8-bit flag field with two flags defined and
the remaining 6 bits reservered (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 IANA to create
a new registry for the PIO flags to avoid potential conflict in the
use of these flags.
2. Current Prefix Information Option flags
Currently, the NDP Prefix Information Option 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
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3. Updates to RFC4861
This document updates RFC4861 with the new IANA Considerations
section specified below.
4. IANA Considerations
The IANA is requested to create a new registry for IPv6 ND Prefix
Information Option flags. This should include the current flags in
the PIO option. The format for the registry is:
+---------------+---------------------------------+-----------+
| RA Option Bit | Description | Reference |
+---------------+---------------------------------+-----------+
| 0 | L - On-link Flag | [RFC4861] |
| 1 | A - Autonomous Address | [RFC4861] |
| | Configuration Flag | |
| 2 | R - Router Address Flag | [RFC6275] |
+---------------+---------------------------------+-----------+
Figure 2
The assignment of new flags in the PIO option header require
standards action or IESG approval.
The registry for these flags should be added to:
http://www.iana.org/assignments/icmpv6-parameters
5. References
5.1. Normative References
[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>.
[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>.
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5.2. Informative References
[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>.
Author's Address
Ole Troean
Cisco Systems
Philip Pedersens vei 1
Lysaker 1366
Norway
Email: ot@cisco.com
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