SC386 - The Evolution of WAN Transport towards SDN Architectures and Cloud Service Delivery
Monday, 21 March
13:30 - 16:30
Short Course Level: Advanced Beginner
Loukas Paraschis; Cisco Systems, Inc., USA
Short Course Description:
A significant evolution in wide‐area networks (WAN) is currently underway, extensively motivated by the proliferation of “cloud” service delivery. The new WAN architectures increasingly combine also the adoption of software‐defined‐network (SDN) innovations, and network‐function‐virtualization (NFV). This introductory short‐course reviews the most important characteristics of this evolution, focusing specifically in the synergies of routing and optical transport with data‐center based service delivery, and the recent innovations in software and routing control plane.
The increasing availability of cost‐effective, high‐capacity, and reliable network connectivity has enabled the explosive growth of Internet‐based service delivery models, commonly referred to as “public‐cloud”. raditional dedicated network connectivity (VPN) has also been evolving to accommodate “private cloud” service delivery. Networking is crucial in optimizing the cost‐performance of the combined (“hybrid cloud”) infrastructure, which in both cases consists of data‐centers of massive compute, and storage resources. Moreover, interconnecting data‐centers (DCI) has become the largest new source of WAN traffic, motivating its evolution towards flatter, more densely connected architectures, with important implications for routing and optical transport, and traffic engineering. Moreover, this WAN evolution has very often been combined with the adoption of significant network innovations in software and routing control plane, collectively referred to as SDN and NFV. This course starts by evaluating carefully, beyond any “SDN” and “cloud” hype, the main SDN (and to a much less extended NFV) use‐cases that are becoming important in wireline transport. Unlike the initial SDN use inside datacenter overlays, wireline SDN mainly advances WAN automation, traffic engineering optimization, and security. The course then reviews also new promising related technologies; notably new protocols like Source Packet Routing (IETF SPRING), NETCONF/YANG, PCEP, BGP‐LS, and open‐source network controllers, like Open Day Light, that aim to improve wireline operations and infrastructure utilization in core, metro, and access. Finally, the DCI use‐cases are analyzed in detail, and the important transport innovations in the new “cloud‐centric” SDN architectures are evaluated, including novel traffic engineering, potentially extending to multi‐layer transport. Optical is also specifically discussed here, with main emphasis in the new flex‐spectrum, super‐channel DWDM transmission, as one important future SDN use‐case, and an active area of applied research.
Short Course Benefits:
This short course will enhance the audience understanding of the interplay between SDN architectures,
and wireline transport technology innovations during the evolution of the public and private cloud WAN
Short Course Audience:
This short course is primarily intended for researchers, students, and industry professionals in optical
transport that wish to obtain a perspective on current wireline network evolution, with a particular
focus on the implications of SDN, and cloud service delivery.
Loukas (Lucas) Paraschis is senior architect in cisco’s global service provider team. His current work
focuses on the SDN WAN evolution, and the related innovations in network automation and
optimization, IP/MPLS routing and optical transport technologies, business models, and market
development efforts. Prior to his current role, Loukas worked as an R&D engineer, product manager,
technical leader, and business development manager for optical and routing infrastructure of service
provider, large enterprise, and public sector networks. He has (co)authored more than 50 peerreviewed
publications, many invited, and tutorial presentations, two book chapters, three patents, and
was an IEEE Distinguished Lecturer on this topic. Loukas has a Ph.D. from Stanford University, is an
associated editor of JOCN, a senior member of IEEE, and a Fellow of OSA.