In this paper, we present Alibaba’s practices and views on open and disaggregated optical transport networks, with a focus on metro data center interconnects (DCIs). We first discuss technology developments that have enabled open optical transport networks, followed by a presentation of our open optical network architecture for DCI networks. We then describe an overall data center network architecture and the application scenario of open and disaggregated DCI technology. Details of the point-to-point DCI network architecture and the need for reconfigurable optical add–drop multiplexers (ROADMs) in DCI networks are then discussed. We present the data models of DCI equipment, including optical terminal transponders, point-to-point optical line systems, and ROADMs, developed based on OpenConfig YANG models. The detailed design and implementation of a home-grown control and management software platform for DCI networks are also presented. We conclude with a discussion of the real deployment of the technology in Alibaba’s networks.

中文翻译：

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用于数据中心互连的开放式和分解式光传输网络[已邀请]

在本文中，我们介绍了阿里巴巴在开放式和分解式光传输网络方面的实践和观点，重点是城域数据中心互连（DCI）。我们首先讨论启用开放式光传输网络的技术发展，然后介绍用于DCI网络的开放式光网络架构。然后，我们描述了整个数据中心网络体系结构以及开放和分类DCI技术的应用场景。然后讨论了点对点DCI网络体系结构的详细信息以及DCI网络中对可重新配置的光分插复用器（ROADM）的需求。我们介绍了基于OpenConfig YANG模型开发的DCI设备的数据模型，包括光终端应答器，点对点光线路系统和ROADM。还介绍了DCI网络的本地控制和管理软件平台的详细设计和实现。最后，我们讨论了该技术在阿里巴巴网络中的实际部署。