SC411 - Multi-layer Interaction in the Age of Agile Optical Networking
Monday, 20 March
09:00 - 12:00
Short Course Level: Advanced Beginner
Ori A. Gerstel; Sedona Systems, Israel, USA
Short Course Description:
Optical networks are becoming more agile with ROADMs, control planes, and more recently, SDN. However much of value from such agility can only be achieved if the optical layer interacts with the client layer – be it an OTN layer, a packet-transport layer or an IP layer. Without such interaction, the optical layer cannot assess the impact of new client layer links, and therefore cannot add new connections; It can also not reoptimize or reroute existing connections without losing client layer traffic. Using such interaction, the network can quickly move optical capacity to where it is needed by the client layer, instead of today’s approach, of over-provisioning static client links to address different scenarios. Applications that make use of such multi-layer interactions range from combined IP-optical restoration, through router bypass and network reoptimization, to disaster recovery. We will review these applications and the role that each layer plays in enabling them.
The interactions between the layers are varied: from hardware integration (e.g., IPoDWDM), through multi-layer control plane technologies (UNI, GMPLS), to centralized intelligence via network management, PCE and SDN tools. We will review the impact of each of these interactions on the network and understand the cost savings that can be achieved and how they can be quantified. In this context, we will also review the pros and cons of using distributed control planes vs. centralized SDN control, and how the two can be harmonized to create a more optimal solution. We will briefly also review emerging standards – such as extensions to GMPLS UNI, BGP-LS, PCEP, TAPI, and various YANG models.
Special focus will be given to how IP and optical networks are planned today, and how combining the planning processes and taking the above multi-layer interactions into account enables significant savings in the network.
Short Course Benefits:
This course should enable you to:
Describe IP layer behaviors that affect multi-layer networking.
Explain types of multi-layer interactions (physical integration, control plane, SDN, mgmt plane).
Define multi-layer functionality (restoration, reoptimization, disaster recovery,…).
Quantify the value for multi-layer functionality.
Describe the interaction between IP layer protection and optical restoration.
Explain how multi-layer interaction affects the planning process.
Understand how elastic flexgrid networking benefits from multi-layer interaction.
Discuss possible centralized/distributed control plane architectures and their pros/cons.
Short Course Audience:
The audience for this course includes system and network architects and engineers in network operators and equipment vendors, as well as researchers wanting to understand realistic methodologies for modeling multi-layer networks. The course assumes some familiarity with optical network architectures and basic understanding of the role of higher layer networks and how they connect to the optical layer.
Dr. Ori Gerstel is the founder/CTO of Sedona Systems. Until 2014, Ori was a Principal Engineer at Cisco, where he was responsible for the architecture of router-transport integration. Until 2002, Ori held senior system architecture positions at Tellabs and Nortel and IBM. Ori published ~100 papers in the main conferences and journals in the field, and several book chapters. He holds over 35 patents, and a similar number of pending patents. He serves as editor-in-chief of JOCN and steering committee member for OFC. Ori holds a Ph.D. degree from the Technion and is an IEEE and OSA Fellow.