2. 术语 (Terminology)
本文档更新 IPv6 Neighbor Discovery 以及相关 6LoWPAN/RPL 规范, 允许节点向邻居路由器注册 IPv6 前缀. 本节定义规范性语言、继承术语、缩写以及本文档新增术语.
2.1. 要求语言 (Requirements Language)
本文档中的关键词 "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY" 和 "OPTIONAL" 只有在以这里所示的全大写形式出现时, 才按 BCP 14 [RFC2119] [RFC8174] 中的说明解释.
2.2. 继承的术语和概念 (Inherited Terms and Concepts)
本文档使用以下文档中讨论的术语和概念:
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"Neighbor Discovery for IP version 6 (IPv6)" [RFC4861].
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"IPv6 Stateless Address Autoconfiguration" [RFC4862], 用于 Neighbor Solicitation 操作.
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"Neighbor Discovery Optimization for IPv6 over Low-Power Wireless Personal Area Networks (6LoWPANs)" [RFC6775].
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"Registration Extensions for IPv6 over Low-Power Wireless Personal Area Network (6LoWPAN) Neighbor Discovery" [RFC8505].
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"RPL: IPv6 Routing Protocol for Low-Power and Lossy Networks" [RFC6550], 其中 RPL 是 LLN 中用于 SND 的路由协议.
2.3. 缩写和首字母缩略词 (Acronyms and Initialisms)
本文档使用以下缩写. 缩写本身和英文展开保持原文, 中文释义用于帮助理解:
| 缩写 | 英文展开 | 中文说明 |
|---|---|---|
| 6CIO | 6LoWPAN Capability Indication Option [RFC7400] | 6LoWPAN 能力指示选项 |
| 6LBR | 6LoWPAN Border Router [RFC6775] | 6LoWPAN 边界路由器 |
| 6LN | 6LoWPAN Node [RFC6775] | 6LoWPAN 节点 |
| 6LR | 6LoWPAN Router [RFC6775] | 6LoWPAN 路由器 |
| ARO | Address Registration Option [RFC6775] | 地址注册选项 |
| DAD | Duplicate Address Detection [RFC4861] | 重复地址检测 |
| DAO | Destination Advertisement Object [RFC6550] | 目的地通告对象 |
| DODAG | Destination-Oriented Directed Acyclic Graph | 面向目的地的有向无环图 |
| EARO | Extended Address Registration Option [RFC8505] | 扩展地址注册选项 |
| EDAC | Extended Duplicate Address Confirmation [RFC8505] | 扩展重复地址确认 |
| EDAR | Extended Duplicate Address Request [RFC8505] | 扩展重复地址请求 |
| ESS | Extended Service Set [IEEE80211] | 扩展服务集 |
| IPAM | IP Address Management | IP 地址管理 |
| LLN | Low-Power and Lossy Network | 低功耗有损网络 |
| LLA | Link-Layer Address | 链路层地址 |
| LoWPAN | Low-Power Wireless Personal Area Network | 低功耗无线个人区域网 |
| LR-WPAN | Low-Rate Wireless Personal Area Network [IEEE802154] | 低速率无线个人区域网 |
| MAC | Medium Access Control | 介质访问控制 |
| NA | Neighbor Advertisement (message) [RFC4861] | 邻居通告消息 |
| NBMA | Non-Broadcast Multi-Access (full mesh) | 非广播多路访问 |
| NCE | Neighbor Cache Entry [RFC4861] | 邻居缓存项 |
| ND | Neighbor Discovery (protocol) | 邻居发现协议 |
| NDP | Neighbor Discovery Protocol | 邻居发现协议 |
| NS | Neighbor Solicitation (message) [RFC4861] | 邻居请求消息 |
| ROVR | Registration Ownership Verifier [RFC8505] | 注册所有权验证器, 发音为 "rover" |
| RPL | IPv6 Routing Protocol for LLNs [RFC6550] | 面向 LLN 的 IPv6 路由协议, 发音为 "ripple" |
| RA | Router Advertisement (message) [RFC4861] | 路由器通告消息 |
| RS | Router Solicitation (message) [RFC4861] | 路由器请求消息 |
| RTO | RPL Target Option [RFC6550] | RPL 目标选项 |
| SLLAO | Source Link-Layer Address Option [RFC4861] | 源链路层地址选项 |
| SND | Subnet Neighbor Discovery (protocol) | 子网邻居发现协议 |
| TID | Transaction ID [RFC8505] | 事务 ID |
| TIO | Transit Information Option [RFC6550] | 中转信息选项 |
| TLLAO | Target Link-Layer Address Option [RFC4861] | 目标链路层地址选项 |
2.4. 新术语 (New Terms)
本文档引入以下术语:
Origin: 发出前缀通告的节点. 该通告可以采用 NS(EARO) 形式, 也可以作为 DAO(TIO, RTO) 出现.