ISO/IEC 11518的本部分定义了HIPPI物理层交换机的控制。HIPPI本身就是一个高效的单工高性能点到点接口。物理交换机控制允许多个基于HIPI的设备与HIPI物理层交换机互连。 HIPPI物理交换机控制协议的特点包括: -支持源路由和目标地址； -I-Fields和CCI可以跨越一个结构中的多个物理层交换机； -当目的地端点接收到数据包时，它可以轻松地操作I- 字段，用于将应答包返回给源； -支持具有不同端口数的物理层交换机，所有端口都位于同一结构中； -指定的保留地址有助于地址自我发现、交换机管理和交换机控制。 ISO/IEC 11518本部分的目的是通过提供通用物理开关控制，促进计算机系统中HIPPI的开发和使用。它为连接计算机、高性能显示系统和高性能计算机的物理层交换机提供交换机控制结构- 高性能、智能块传输外围设备。ISO/IEC 11518的本部分也适用于点对点HIPPI拓扑。

This part of ISO/IEC 11518 defines the control for HIPPI physical layer switches. HIPPI by itself is an efficient simplex high-performance point-to-point interface. The physical switch control allows the interconnection of multiple HIPPI based equipments with HIPPI physical layer switches. Characteristics of this HIPPI physical switch control protocol include: - support for both source routing and destination addresses; - I-Fields and CCIs can span multiple physical layer switches within a fabric; - when a Destination end-point receives a packet, it can easily manipulate the I-Field received to return a reply packet to the Source; - support for physical layer switches with differing numbers of ports, all within the same fabric; - specified reserved addresses to aid address self-discovery, switch management, and switch control. The purpose of this part of ISO/IEC 11518 is to facilitate the development and use of the HIPPI in computer systems by providing common physical switch control. It provides switch control structures for physical layer switches interconnecting computers, high-performance display systems, and high-performance, intelligent block-transfer peripherals. This part of ISO/IEC 11518 also applies to point-to-point HIPPI topologies.