The utilization of IP over wavelength division multiplexing (IPoWDM) boxes in optical networks introduces coordination issues at the control plane level between the optical and packet domains. Indeed, IPoWDM boxes are technically packet devices, but the configuration of coherent optical pluggables requires knowledge of optical network state information (e.g., wavelength availability). MANTRA (metaverse ready architectures for open transport) aims to define a new SDN control architecture for managing IPoWDM, enhancing coordination between the packet and optical controllers. Within MANTRA, two distinct architectures were presented: Dual and Single. However, only the roles related to controller management are defined, while clear procedures are not specified for dealing with resource provisioning and failure recovery. This leads to the need for the definition and implementation of tailored procedures. Besides the characterization of the coherent optical pluggables performance, this paper presents and compares three procedures based on MANTRA to coordinate and control IPoWDM nodes in a multi-layer network performing failure recovery. The considered solutions have been designed and experimentally validated with a focus on the achievable traffic recovery performance considering IPoWDM configuration and communication within the SDN control architecture. An experimental testbed, comprising a sliced IPoWDM node running an extended version of the open-source SONiC network operating system, has been deployed to validate these solutions, with a comprehensive analysis of the time required to recover a real traffic flow that spans both the packet and optical domains.

中文翻译：

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具有 IPoWDM SONiC 节点和 400ZR/ZR+ 可插拔设备的 MANTRA 架构中的故障恢复

光网络中 IP 波​​分复用 (IPoWDM) 盒的使用引入了光域和分组域之间控制平面级别的协调问题。事实上，IPoWDM盒在技术上是分组设备，但是相干光可插拔设备的配置需要了解光网络状态信息（例如，波长可用性）。MANTRA（开放传输的元宇宙就绪架构）旨在定义一种新的 SDN 控制架构，用于管理 IPoWDM，增强数据包和光控制器之间的协调。在 MANTRA 中，提出了两种不同的架构：双架构和单架构。然而，仅定义了与控制器管理相关的角色，而没有指定处理资源供应和故障恢复的明确流程。这导致需要定义和实施量身定制的程序。除了相干光可插拔性能的表征之外，本文还介绍并比较了基于 MANTRA 的三种程序，以协调和控制多层网络中执行故障恢复的 IPoWDM 节点。所考虑的解决方案经过设计和实验验证，重点是考虑到 SDN 控制架构内的 IPoWDM 配置和通信，可实现的流量恢复性能。已部署实验测试台来验证这些解决方案，其中包括运行开源 SONiC 网络操作系统扩展版本的切片 IPoWDM 节点，并对恢复跨数据包的真实流量所需的时间进行全面分析和光域。