Michael Roth - Vice President R&D EU-Japan Workshop, Brussels, April 18 th 2013 Need to extend...

Michael Roth - Vice President R&D

EU-Japan Workshop, Brussels, April 18th 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


Challenges in Multivendor setupCisco 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


ONE Project


Software-Defined Networks (SDN)

SDO + SDN = Software-Defined Optical Networks (SDON).SDO + SDN = Software-Defined Optical Networks (SDON).


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• …


Optical OpenFlow

GMPLS functions can augment OpenFlow to mask optical layer complexity. GMPLS functions can augment OpenFlow to mask optical layer complexity.

Cooperation with

First ROADM-

based OpenFlow

Networking

Testbed


Virtualization


Cloud Data Centers

Virtualization is a key concept to pool servers, storage and appliancesand share them in a flexible and dynamic way.

Virtualization is a key concept to pool servers, storage and appliancesand share them in a flexible and dynamic way.

VirtualserverVirtualserverVirtual

networkVirtual

network

VirtualstorageVirtualstorage

Orchestration of IT & network resourcesOrchestration of IT & network resources

Storage pool Fabric interconnect Server pool


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


Use Cases

Bandwidth calendaring Cloud 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

PrivateDatacenters

Tenant 1

Tenant 2Load Load


Optical Virtualization ChallengesPacket Switch Optical -Switch

Signal format Digital electronic Analog optical

Signal structure Ethernet frames Signal dependent

Payload visibility Yes No

Topology discovery In-band (e.g. LLDP) Out-of band (e.g. OSC)

Fabric connectivity Any-to-any Constrained

Path feasibility Implicit Dep. on signal quality

Path set-up Any order Sequential

Analog nature and switching constraints make optical networks difficult to virtualize.Analog nature and switching constraints make optical networks difficult to virtualize.


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.Compromise necessary: Hiding optical complexity while exposing topology.


Optical Virtualization – SDN Control

Ab

str

acti

on

Topology DB

Flow DBResource

DB

Management

Policy DB

Control Database

Network Controller

Network Hypervisor

Restful APIwith Extensions

vNetwork Controller vNetwork Controller

Physi

cal re

ssourc

es

Deri

ved t

opolo

gy


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

BVTElastic optical network

Service A

Service B

Service C

Service A

Service B

Service C


STRAUSS overall architecture

16


Research Activities


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.

[email protected]

Thank you

IMPORTANT NOTICE

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Michael Roth - Vice President R&D EU-Japan Workshop, Brussels, April 18 th 2013 Need to extend...

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