信息技术.系统间远程通信及信息交换.与提供无连接式网络服务协议(ISO 8473)一起使用的中间系统到中间系统域内路由选择信息交换协议

[中文适用范围]： 本国际标准指定了一种协议，网络层实体使用中间系统中 ISO 8473 中指定的协议来维护路由信息，以便在单个路由域内进行路由。 本国际标准中规定的协议依赖于无连接模式底层服务的提供。 本国际标准规定： a) 在单个路由域内的中间系统中的网络实体之间传输配置和路由信息的程序； b) 用于传输配置和路由信息的协议数据单元的编码； c) 正确解释协议控制信息的程序； d) 声称符合本国际标准的实现的功能要求。 该过程是根据以下方面定义的： a) 中间系统网络实体之间通过协议数据单元交换进行的交互； b) 网络实体和底层服务提供者之间通过子网服务原语的交换进行交互； c) 当每个中间系统具有与其他系统一致的路由信息库时，每个中间系统必须遵守路由确定的约束。 注：1) 请参阅 ISO 8473 及其附录 3，了解在基于 ISO/IEC 8208、ISO 8802 和 OSI 数据链路服务的子网上实现此服务所需的机制。 [外文原描述]： This International Standard specifies a protocol which is used by Network Layer entities operating the protocol specified in ISO 8473 in Intermediate Systems to maintain routeing information for the purpose of routeing within a single routeing domain. The protocol specified in this International Standard relies upon the provision of a connectionless-mode underlying service.1) This International Standard specifies: a) procedures for the transmission of configuration and routeing information between network entities residing in Intermediate Systems within a single routeing domain; b) the encoding of the protocol data units used for the transmission of the configuration and routeing information; c) procedures for the correct interpretation of protocol control information; and d) the functional requirements for implementations claiming conformance to this International Standard. The procedures are defined in terms of a) the interactions between Intermediate system Network entities through the exchange of protocol data units; b) the interactions between a Network entity and an underlying service provider through the exchange of subnetwork service primitives; and c) the constraints on route determination which must be observed by each Intermediate system when each has a routeing information base which is consistent with the others.