Transcript cordis.europa.eu

Need to extend Virtualization
to Optical Transport Domain
Michael Roth - Vice President R&D
EU-Japan Workshop, Brussels, April 18th 2013
Outline
• Introduction – ONE EU Project
• Optical Network Virtualization
• Prospects, Challenges & Solutions
• Summary
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Challenges in Multivendor setup
Cisco IPNMS/OSS
Multi-layer
interoperability
problem
ALU IP-NMS/OSS
Multi-vendor interoperability
problem
Ciena TNMS/OSS
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JUNIPER IPNMS/OSS
ADVA TNMS/OSS
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ALU T-NMS/OSS
ONE Project
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Software-Defined Networks (SDN)
SDO + SDN = Software-Defined Optical Networks (SDON).
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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:
•
•
•
•
•
•
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Simplicity
Vendor independency
Reduced costs (CAPEX & OPEX)
Complete Network overview
Simplified Operation
…
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Optical OpenFlow
Cooperation with
First ROADMbased OpenFlow
Networking
Testbed
GMPLS functions can augment OpenFlow to mask optical layer complexity.
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Virtualization
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Cloud Data Centers
Orchestration of IT & network resources
Virtual
storage
Virtual
server
Virtual
network
Storage pool
Fabric interconnect
Server pool
Virtualization is a key concept to pool servers, storage and appliances
and share them in a flexible and dynamic way.
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Network Virtualization - Definition
Virtual Network 2
Virtual Network 1
Networks 1 & 2
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.
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Use Cases
Bandwidth calendaring
Cloud bursting
Cloud DC
Private
Datacenters
Workload balancing
Secure multi-tenancy
Tenant 1
Load
Load
Tenant 2
Transactional nature of DC-to-DC traffic (bulk data transfers)
offers opportunities for optical bandwidth-on-demand.
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Optical Virtualization Challenges
Packet Switch
Optical l-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
Implicit
Dep. on signal quality
Any order
Sequential
Path feasibility
Path set-up
Analog nature and switching constraints make optical networks difficult to virtualize.
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Optical Virtualization – Two Extremes
•
•
Virtualization on fundamental level
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All nodes and links are exposed
•
Direct hardware representation
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Highest flexibility for tenants/applications
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Users need to control/understand optical layer
Virtualization on highest derived level
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Network abstracted as one large switch
•
Can be l-, circuit or packet switch
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Users see switch as black box
•
Internal structure & optical layer are hidden
Compromise necessary: Hiding optical complexity while exposing topology.
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Optical Virtualization – SDN Control
with Extensions
Network Hypervisor
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Policy Manager
Database
Resource Mgr
Provisioning
Path Compute
Topology Disc
Control
Security
Performance
Accounting
Configuration
Fault & alarms
Management
Flow DB
Resource DB
Topology DB
Policy DB
Network Controller
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Abstraction
Restful API
Derived topology
vNetwork Controller
Physical ressources
vNetwork Controller
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
Data Center
Data Center
Servic
eA
Servic
eB
Servic
eA
Servic
eC
Elastic optical network
BVT
Ethernet
Switch
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Servic
eB
Servic
eC
BVT
Ethernet
OPS
Switch
OPS
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STRAUSS overall architecture
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Research Activities
Generalized architecture for
dynamic infrastructure services
OpenFlow in Europe – Linking
Infrastructure and Applications
Towards Automated Interactions
between the Internet & CarrierGrade Management Ecosystem
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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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Thank you
[email protected]
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