V2EX link-state

Link-State

Definition / 定义

(网络)“链路状态”:一种路由思想/方法,路由器收集并发布自己与邻居之间链路的状态与开销(如带宽、延迟、是否可用),形成全网拓扑视图,再用算法(常见为 Dijkstra 最短路径算法)计算到各目的地的最佳路径。常见于 OSPF、IS-IS 等协议。(注:在别的语境中也可泛指“链路的当前状态”。)

Pronunciation / 发音

/lk stet/

Examples / 例句

Our network uses link-state routing to adapt quickly when a link fails.
我们的网络使用链路状态路由,这样当某条链路故障时能快速调整。

In a large enterprise, link-state protocols distribute topology information so each router can compute shortest paths independently.
在大型企业网络中,链路状态协议分发拓扑信息,使每台路由器都能独立计算最短路径。

Etymology / 词源

link(链路、连接)+ state(状态)组成的复合词。最早与计算机网络路由技术的发展密切相关,用来强调“以链路的状态信息为基础”来进行路由计算,与“距离向量(distance-vector)”思路相对。

Related Words / 相关词

Notable Works / 著名作品

  • Computer Networks(Andrew S. Tanenbaum, David J. Wetherall)讲解链路状态与距离向量路由的经典教材。
  • Interconnections: Bridges, Routers, Switches, and Internetworking Protocols(Radia Perlman)涵盖链路状态思想与相关协议背景。
  • Routing TCP/IP, Volume I(Jeff Doyle, Jennifer DeHaven Carroll)详细讨论 OSPF 等链路状态路由协议。
  • IETF 标准文档:RFC 2328(OSPFv2)与 RFC 5340(OSPFv3)在协议规范语境中大量出现“link-state”及相关术语。
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