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Michael Roth - Vice President R&D EU-Japan Workshop, Brussels, April 18 th 2013 Need to extend Virtualization to Optical Transport Domain
© 2013 ADVA Optical Networking. All rights reserved. Confidential. 22 Outline Introduction – ONE EU Project Optical Network Virtualization Prospects, Challenges & Solutions Summary
© 2013 ADVA Optical Networking. All rights reserved. Confidential. 33 Challenges in Multivendor setup Cisco IP- NMS/OSS JUNIPER IP- NMS/OSS Ciena T- NMS/OSS Multi-layer interoperability problem Multi-vendor interoperability problem ALU IP-NMS/OSS ADVA T- NMS/OSS ALU T-NMS/OSS
© 2013 ADVA Optical Networking. All rights reserved. Confidential. 44 ONE Project
© 2013 ADVA Optical Networking. All rights reserved. Confidential. 55 Software-Defined Networks (SDN) SDO + SDN = Software-Defined Optical Networks (SDON).
© 2013 ADVA Optical Networking. All rights reserved. Confidential. 66 Software Defined Networking Software-defined networking (SDN) is a current trend for future Network development of any kind Key objective: Virtualize the network and converge the orchestration of the virtualized networks with VMs in the data centers to create a true network-supported "Cloud" Key component: Open interface between a (centralized) control and the forwarding plane for SDN. One possible solution: OpenFlow (defined by ONF) Focused on packet networks – emerging to Transport Assumed/hoped/dreamed key benefits: Simplicity Vendor independency Reduced costs (CAPEX & OPEX) Complete Network overview Simplified Operation …
© 2013 ADVA Optical Networking. All rights reserved. Confidential. 77 Optical OpenFlow GMPLS functions can augment OpenFlow to mask optical layer complexity. Cooperation with First ROADM- based OpenFlow Networking Testbed
© 2013 ADVA Optical Networking. All rights reserved. Confidential. 88 Virtualization
© 2013 ADVA Optical Networking. All rights reserved. Confidential. 99 Cloud Data Centers Virtualization is a key concept to pool servers, storage and appliances and share them in a flexible and dynamic way. Virtualization is a key concept to pool servers, storage and appliances and share them in a flexible and dynamic way.
© 2013 ADVA Optical Networking. All rights reserved. Confidential. 10 Network Virtualization - Definition Any form of partitioning or combining a set of network resources, and presenting it in an abstracted form to users such that each user, through his set of resources, has a unique, separate view of the network. [Wang et al., JLT, 12/2012] User: Data center tenants, virtual machines, workloads or applications. Resources: Fundamental (nodes, links) or derived (topologies), can be virtualized recursively. Requirements: User isolation, configuration independence, elasticity and programmability. Virtual Network 1 Virtual Network 2 Networks 1 & 2
© 2013 ADVA Optical Networking. All rights reserved. Confidential. 11 Use Cases Bandwidth calendaringCloud bursting Secure multi-tenancyWorkload balancing Transactional nature of DC-to-DC traffic (bulk data transfers) offers opportunities for optical bandwidth-on-demand. Transactional nature of DC-to-DC traffic (bulk data transfers) offers opportunities for optical bandwidth-on-demand. Cloud DC Private Datacenters Tenant 1 Tenant 2 Load
© 2013 ADVA Optical Networking. All rights reserved. Confidential. 12 Optical Virtualization Challenges Packet Switch Optical -Switch Signal formatDigital electronicAnalog optical Signal structureEthernet framesSignal dependent Payload visibilityYesNo Topology discoveryIn-band (e.g. LLDP)Out-of band (e.g. OSC) Fabric connectivityAny-to-anyConstrained Path feasibilityImplicitDep. on signal quality Path set-upAny orderSequential Analog nature and switching constraints make optical networks difficult to virtualize.
© 2013 ADVA Optical Networking. All rights reserved. Confidential. 13 Optical Virtualization – Two Extremes Virtualization on fundamental level All nodes and links are exposed Direct hardware representation Highest flexibility for tenants/applications Users need to control/understand optical layer Virtualization on highest derived level Network abstracted as one large switch Can be -, circuit or packet switch Users see switch as black box Internal structure & optical layer are hidden Compromise necessary: Hiding optical complexity while exposing topology.
© 2013 ADVA Optical Networking. All rights reserved. Confidential. 14 Optical Virtualization – SDN Control Abstraction Topology DB Flow DB Configuration Path Compute Provisioning Policy Manager Resource DB Fault & alarms Accounting Performance Security Management Policy DB Control Resource Mgr Database Topology Disc Network Controller Network Hypervisor Restful API with Extensions vNetwork Controller Physical ressources Derived topology
© 2013 ADVA Optical Networking. All rights reserved. Confidential. 15 The need for flexible optical networks STRAUSS EU-Japan Project Fixed-grid DWDM transport networks, electrical packet switching and aggregation technologies are not efficient for data rates beyond 100 Gbps. Elastic optical networks (EON) and optical packet switching (OPS) are key technologies for addressing these issues 15 Data Center Ethernet Switch OPS BVT Data Center Ethernet Switch OPS BVT Elastic optical network Servic e A Servic e B Servic e C Servic e A Servic e B Servic e C
© 2013 ADVA Optical Networking. All rights reserved. Confidential. 16 STRAUSS overall architecture 16
© 2013 ADVA Optical Networking. All rights reserved. Confidential. 17 Research Activities
© 2013 ADVA Optical Networking. All rights reserved. Confidential. 18 Summary Optical network virtualization offers cloud providers & tenants high-bandwidth, low-latency connectivity on demand. Different models for optical network virtualization exist. A compromise between hiding the optical complexity and exposing the optical topology is required. Open approaches based on standardized GMPLS or emerging OpenFlow technologies are possible.
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