用于使用IEEE 802的数据处理设备的兼容互连 使用不同或不同网络的互连IEEE 802标准局域网支持的MAC服务 与介质访问控制方法相同，本标准规定了MAC网桥操作的一般方法。为此目的 （1） 在MAC子层的体系结构描述中定位桥接功能。 （2） 定义MAC网桥在支持和维护MAC服务以及维护服务质量方面的操作原则。 （3） 指定各个LAN为媒体访问提供的MAC内部子层服务 在桥接器中提供帧中继的方法独立功能。 （4） 确定桥接器要执行的功能，并提供桥接器的体系结构模型 就提供这些功能的流程和实体而言，桥梁的内部操作。 （5） 建立桥接局域网中桥之间协议的要求，以配置网络，并指定生成树活动拓扑的分布式计算。 （6） 指定网桥协议数据单元（BPDU）的编码。 （7） 确定桥接局域网中桥接管理的要求，确定受管对象并定义管理操作。 （8） 指定如何使用IEEE Std 802.1B提供的协议和体系结构描述向远程管理器提供管理操作。 （9） 指定性能要求，并建议系统的默认值和适用范围 桥梁的运行参数。 （10） 规定声称符合本标准的设备应满足的要求。 （11） 指定使用MAC特定桥接方法的标准。 本标准规定了直接连接到局域网的MAC网桥的操作，如MAC技术的相关MAC标准所规定。虽然不是IEEE 802或ISO 8802系列LAN标准的一部分，但ISO 9314系列标准中描述的光纤分布式数据接口（FDDI）令牌环可被视为等效MAC。 除非另有说明，否则本标准中提到的802局域网包括FDDI。 使用广域网（WAN）介质互连局域网的远程网桥规范 对于桥梁之间的框架传输，不在本标准的范围内。

For the purpose of compatible interconnection of data processing equipment using the IEEE 802 MAC Service supported by interconnected IEEE 802 Standard Local Area Networks using different or identical Media Access Control methods, this standard specifies a general method for the operation of MAC Bridges. To this end it (1) Positions the bridging function within an architectural description of the MAC Sublayer. (2) Defines the principles of operation of the MAC Bridge in terms of the support and preservation of the MAC Service, and the maintenance of Quality of Service. (3) Specifies the MAC Internal Sublayer Service provided by individual LANs to the Media Access Method Independent Functions that provide frame relay in the Bridge. (4) Identifies the functions to be performed by Bridges, and provides an architectural model of the internal operation of a Bridge in terms of Processes and Entities that provide those functions. (5) Establishes the requirements for a protocol between the Bridges in a Bridged Local Area Network to configure the network, and specifies the distributed computation of a Spanning Tree active topology. (6) Specifies the encoding of the Bridge Protocol Data Units (BPDUs). (7) Establishes the requirements for Bridge Management in the Bridged Local Area Network, identifying the managed objects and defining the management operations. (8) Specifies how the management operations are made available to a remote manager using the protocol and architectural description provided by IEEE Std 802.1B. (9) Specifies performance requirements and recommends default values and applicable ranges for the operational parameters of a Bridge. (10) Specifies the requirements to be satisfied by equipment claiming conformance to this standard. (11) Specifies criteria for the use of MAC-specific bridging methods. This standard specifies the operation of MAC Bridges that attach directly to LANs as specified in the relevant MAC standards for the MAC technology or technologies implemented. Though not part of the IEEE 802 or ISO 8802 series LAN standards, the Fibre Distributed Data Interface (FDDI) token ring, described in the ISO 9314 series of standards, can be considered an equivalent MAC. Unless indicated otherrewise, mention in this standard of 802 LANs includes FDDI. The specification of Remote Bridges, which interconnect LANs using Wide Area Network (WAN) media for the transmission of frames between Bridges, is outside the scope of this standard.