Internet Engineering Task Force (IETF) O. Troan
Request for Comments: 8425 Cisco Systems
Updates: 4861 July 2018
Category: Standards Track
ISSN: 2070-1721
Internet Engineering Task Force (IETF) O. Troan
Request for Comments: 8425 Cisco Systems
Updates: 4861 July 2018
Category: Standards Track
ISSN: 2070-1721
IANA Considerations for IPv6 Neighbor Discovery Prefix Information Option Flags
IPv6邻居发现前缀信息选项标志的IANA注意事项
Abstract
摘要
The Prefix Information Option (PIO) in the IPv6 Neighbor Discovery Router Advertisement message defines an 8-bit flag field; this field has two flags defined, and the remaining 6 bits are reserved (Reserved1). RFC 6275 defines a flag from this field without creating an IANA registry or updating RFC 4861. The purpose of this document is to create an IANA registry for the PIO flags. This document updates RFC 4861.
IPv6邻居发现路由器广告消息中的前缀信息选项（PIO）定义了一个8位标志字段；此字段定义了两个标志，其余6位保留（Reserved1）。RFC 6275在不创建IANA注册表或更新RFC 4861的情况下从此字段定义标志。本文档旨在为PIO标志创建IANA注册表。本文档更新了RFC 4861。
Status of This Memo
关于下段备忘
This is an Internet Standards Track document.
这是一份互联网标准跟踪文件。
This document is a product of the Internet Engineering Task Force (IETF). It represents the consensus of the IETF community. It has received public review and has been approved for publication by the Internet Engineering Steering Group (IESG). Further information on Internet Standards is available in Section 2 of RFC 7841.
本文件是互联网工程任务组（IETF）的产品。它代表了IETF社区的共识。它已经接受了公众审查，并已被互联网工程指导小组（IESG）批准出版。有关互联网标准的更多信息，请参见RFC 7841第2节。
Information about the current status of this document, any errata, and how to provide feedback on it may be obtained at https://www.rfc-editor.org/info/rfc8425.
有关本文件当前状态、任何勘误表以及如何提供反馈的信息，请访问https://www.rfc-editor.org/info/rfc8425.
Copyright Notice
版权公告
Copyright (c) 2018 IETF Trust and the persons identified as the document authors. All rights reserved.
版权所有（c）2018 IETF信托基金和确定为文件作者的人员。版权所有。
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 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.
本文件受BCP 78和IETF信托有关IETF文件的法律规定的约束(https://trustee.ietf.org/license-info)自本文件出版之日起生效。请仔细阅读这些文件，因为它们描述了您对本文件的权利和限制。从本文件中提取的代码组件必须包括信托法律条款第4.e节中所述的简化BSD许可证文本，并提供简化BSD许可证中所述的无担保。
Table of Contents
目录
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Current Prefix Information Option Flags . . . . . . . . . . . 2
3. Updates to RFC 4861 . . . . . . . . . . . . . . . . . . . . . 3
4. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 3
5. Security Considerations . . . . . . . . . . . . . . . . . . . 3
6. Normative References . . . . . . . . . . . . . . . . . . . . 4
Author's Address . . . . . . . . . . . . . . . . . . . . . . . . 4
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Current Prefix Information Option Flags . . . . . . . . . . . 2
3. Updates to RFC 4861 . . . . . . . . . . . . . . . . . . . . . 3
4. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 3
5. Security Considerations . . . . . . . . . . . . . . . . . . . 3
6. Normative References . . . . . . . . . . . . . . . . . . . . 4
Author's Address . . . . . . . . . . . . . . . . . . . . . . . . 4
The Prefix Information Option (PIO) in the IPv6 Neighbor Discovery Router Advertisement message defines an 8-bit flag field; this field has two flags defined and the remaining 6 bits are reserved (Reserved1). RFC 6275 defines a flag from this field without creating an IANA registry or updating RFC 4861. The purpose of this document is to create a new registry for the PIO flags.
IPv6邻居发现路由器广告消息中的前缀信息选项（PIO）定义了一个8位标志字段；此字段定义了两个标志，其余6位保留（Reserved1）。RFC 6275在不创建IANA注册表或更新RFC 4861的情况下从此字段定义标志。本文档的目的是为PIO标志创建一个新的注册表。
Currently, the Neighbor Discovery Protocol Prefix Information Option [RFC4861] contains the following one-bit flags defined in published RFCs:
当前，邻居发现协议前缀信息选项[RFC4861]包含在已发布的RFC中定义的以下一位标志：
0 1 2 3 4 5 6 7
+-+-+-+-+-+-+-+-+
|L|A|R|Reserved1|
+-+-+-+-+-+-+-+-+
0 1 2 3 4 5 6 7
+-+-+-+-+-+-+-+-+
|L|A|R|Reserved1|
+-+-+-+-+-+-+-+-+
Figure 1: PIO Flags
图1:PIO标志
L - On-link Flag [RFC4861]
L-接通链路标志[RFC4861]
A - Autonomous Address Configuration Flag [RFC4861]
A-自主地址配置标志[RFC4861]
R - Router Address Flag [RFC6275]
R-路由器地址标志[RFC6275]
Reserved1 - Reserved
保留1-保留
This document updates Section 4.6.2 "Prefix Information" of [RFC4861] to point to the IANA registry that is created in this document (see Section 4).
本文件更新了[RFC4861]第4.6.2节“前缀信息”，以指向本文件中创建的IANA注册表（见第4节）。
Specifically, the current list of flags in the Prefix Information Option can be found in the "IPv6 Neighbor Discovery Prefix Information Option Flags" registry.
具体而言，前缀信息选项中的当前标志列表可以在“IPv6邻居发现前缀信息选项标志”注册表中找到。
IANA has created a new registry for IPv6 Neighbor Discovery Prefix Information Option flags. This registry includes the current flags in the PIO. The initial contents of the registry are as follows:
IANA已为IPv6邻居发现前缀信息选项标志创建了新的注册表。此注册表包括PIO中的当前标志。登记处的初步内容如下：
+----------------+---------------------------------+-----------+
| PIO 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 | |
+----------------+---------------------------------+-----------+
+----------------+---------------------------------+-----------+
| PIO 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: IPv6 Neighbor Discovery Prefix Information Option Flags
图2:IPv6邻居发现前缀信息选项标志
The assignment of new flags in the PIO option header requires Standards Action [RFC8126].
在PIO选项标题中分配新标志需要标准操作[RFC8126]。
The registry for these flags is available at <http://www.iana.org/assignments/icmpv6-parameters>.
这些标志的注册表位于<http://www.iana.org/assignments/icmpv6-parameters>.
This document has no security considerations.
此文档没有安全考虑。
[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>.
[RFC4861]Narten，T.，Nordmark，E.，Simpson，W.，和H.Soliman，“IP版本6（IPv6）的邻居发现”，RFC 4861，DOI 10.17487/RFC48612007年9月<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>.
[RFC6275]Perkins，C.，Ed.，Johnson，D.，和J.Arkko，“IPv6中的移动支持”，RFC 6275，DOI 10.17487/RFC6275，2011年7月<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>.
[RFC8126]Cotton，M.，Leiba，B.，和T.Narten，“在RFC中编写IANA考虑事项部分的指南”，BCP 26，RFC 8126，DOI 10.17487/RFC8126，2017年6月<https://www.rfc-editor.org/info/rfc8126>.
Author's Address
作者地址
Ole Troan Cisco Systems Philip Pedersens vei 1 Lysaker 1366 Norway
Ole Troan Cisco Systems Philip Pedersens vei 1 Lysaker 1366挪威
Email: ot@cisco.com
Email: ot@cisco.com