SC484 - Transport Evolution Due to Cloud Services

Sunday, 06 March
17:00 - 20:00

Short Course Level: Advanced Beginner


Loukas Paraschis, IEEE Communication Society, USA​

Short Course Description:

This course offers an introduction to the recent evolution and main innovations in wireline transport networks due to the proliferation of “cloud” services and resiliency architectures. In many respects, the explosive growth of datacenter service delivery has been the biggest evolution in networking since the proliferation of the Internet more than 20 years ago, and the corresponding growth of the traffic interconnecting data centers (DCI) has arguably been the most significant evolution in wireline transport networks the last 15-20 years, since the transitions from TDM to IP/MPLS and WDM. More specifically, DCI has grown more than any other transport network traffic type, has by now come to dominate the global fiber infrastructure, and has been projected to grow by at least 2 more orders of
magnitude. The economics of this growth motivated the building of dedicated global DCI networks, that address the “cloud” specific resiliency requirements and scale to some of the most spectrally efficient fiber deployments. It also motivated a new class of purpose-built DCI-optimized routing and optical transport systems. 

The course will review the main innovations in technology, system and network architecture that have facilitated the scaling of the cloud transport evolution. For example, cloud transport system optimization has focused on routers maximizing throughput rather than routing scale, and in the early adoption of high capacity, point-to-point, WDM employing state-of-the-art coherent transmission. Cloud transport has also pioneered the extensive adoption of software and network management innovations in programmability, model-driven abstraction, and control-plane disaggregation, often referred collectively as “SDN”. We identify how these software innovations advance network automation and vendor-agnostic declarative configuration management, and how they have also been leveraged to
advance new “open” transport and resiliency architectures, or to explore the potential value from network analytics, and from traffic engineering optimization. Along with reviewing the value of the cloud transport (hardware and software) innovations, we will also debate their potential synergies and trade-offs. For example, we will explore the value of system and control-plane disaggregation in different open line-system (multiple-vendor) network architectures that at the same time aim to minimize the operational overhead, maximize network resiliency, or operate as close as possible to the fiber Shannon limit. Finally, emerging innovations, standards and related research topics will also be summarized.

Short Course Benefits:

This course should enable participants to:

  • Describe the recent evolution in wireline transport networks due to proliferation of cloud.
  • Explain and compare the different cloud service delivery models.
  • Describe the evolution in network resiliency architectures.
  • Identify the value of the cloud-optimized transport innovations, with emphasis on systems employing high-spectral efficiency coherent WDM and photonic-integration.
  • Explain, beyond “SDN” hype, the value of the software innovations pioneered by cloud transport in programmability, model-driven networking, and declarative configuration management, and define the main enabling technologies (e.g. YANG, NETCONF/RESTCONF, Openconfig, gRPC/gNMI, ZTP, etc).
  • Explain the value from “open” transport architectures, the related open-line system and network management abstraction architectures, summarize their enabling technologies, and compare the associated trade-offs.
  • Identify the value from network optimization, traffic engineering, and analytics, review the related enabling technologies (like streaming telemetry), and compare the associated trade-offs.
  • Summarize the emerging industry, standards, and research initiatives in cloud optical transport.
Short Course Audience:

This short course is primarily intended for students, researchers, and industry professionals in optical fiber communication that wish to obtain a perspective on the recent wireline transport network evolution due to cloud services and resiliency architectures. The course is advanced beginner level in the sense that a basic understanding of networking principles is assumed, along with a solid understanding of the basic optical fiber transport technologies. Knowledge of cloud transport is not required as the course will introduce the related concepts and summarize the basic principles of the related system and network innovations.

Instructor Biography:

Loukas Paraschis has 25-year experience in R&D leadership, product management, and business
development related to the Internet and cloud transport network infrastructure. Until the summer
2021, Loukas was senior director and CTO of cloud transport system engineering for Internet and
content providers at Infinera. From 2007-2015, he was cisco’s senior technology architect for
wireline transport in global service provider, and from 2000-2006 technical leader in cisco optical
networking and routing. He has (co)authored more than 100 peer‐reviewed publications, invited and
tutorial presentations, book chapters, and patents, has served in many IEEE and OSA leadership positions,including the OFC and JOCN steering committees, the OFC and IEEE ComSoc long range planning committees, as JOCN associated editor, IEEE Photonics Society Distinguished Lecturer (2009), and is an OSA Fellow (2011). Loukas graduated from Stanford University (PhD 1999, MS 1998) where he worked at the Information Systems and Networking Research laboratories. He was born and raised in Athens,Greece, where he completed his undergraduate studies.