sdn and photonics for dynamic cloud connectivity
DESCRIPTION
Check out Achim Autenrieth's slide set from his OFC workshop entitled "SDN and Photonics for Dynamic Cloud Connectivity. This is all about SDN, Cloud Connectivity and the optical network Hypervisor.TRANSCRIPT
Achim Autenrieth, ADVA Optical Networking
OIDA Software Defined Photonic and Data Center Networks Workshop
09 March 2014, Moscone Center, San Francisco, USA
SDN and Photonicsfor Dynamic Cloud Connectivity
© 2014 ADVA Optical Networking. All rights reserved.22
Cloud Connectivity: What Is Hot?
Cloud services drive demand for dynamic high-speed data center connectivity
Network Virtualization
Programmable WAN connectivity with open SDN implementation
Business ContinuityLow-latency connectivity for synchronous mirroring and disaster recovery solutions
Mega Data Center Connectivity
Cost-, space- and power-efficient high-capacity transport
Cloud and traditional data center growth
“Cloud data center traffic will grow 6-fold from 2011 to 2016 reaching ca. 5 ZB”
Source: Global Cloud Index 2012, CiscoData Center Connectivity
© 2014 ADVA Optical Networking. All rights reserved.33
NMS / CP / SDN
MissionKey Facts
SDN for Optical Data Center Connectivity
• Cloud Bursting
• Secure multi-tenancy
• Dynamic opticalconnectivity
• Global network visibility with “real-time” control
• De-couple virtual from physical network
From cloud access to optical Terabit/s connectivity
Use Cases and DriversRequirements
DC Site 1
MAN / WAN
DC Site NEnterprise
Tenant B cloud
Tenant C cloud
SDN turns the network into a programmable resource
Tenant A cloud
• Network Abstraction
• Virtualization
• Open & standardizedinterfaces
• Multi-tenancycapability
• Integration with existingOSS / NMS / CP
© 2014 ADVA Optical Networking. All rights reserved.44
Transport SDN – Early Attempts
“If all you have
is a hammer,
everything looks
like a nail.”
Abraham Maslow, 1966
Transport SDN is much more than OpenFlow and protocol extensions.
© 2014 ADVA Optical Networking. All rights reserved.55
“Legacy”
Tra
nsport
Networkprogrammability
HW abstractionand virtualization
Centralizedmanagement & control
Flow/circuit oriented data plane
SDN vs. “Legacy” Optical Transport
Separation of data and control plane
Top-down approach: Facilitate optical layer virtualization & programmability.
SDN Principles
© 2014 ADVA Optical Networking. All rights reserved.66
• Orchestration ~ automated configuration / coordination / management of complex systems, devices or systems, can present or deploy autonomic control and elements of control theory.
• A higher level system is required for “end to end composition” or virtual networks
• Abstraction of hardware andvirtualization enables homogeneous service activation processes
• Coordinate the deployment of services controlled by either GMPLS or OpenFlow
Key Business DriverEnd to End Service Orchestration
DC
Eth. Aggr.
OpenFlow-controlledEthernet
Aggregation
WAN
GMPLS-controlled virtual (o real)
WSON/SSON
GMPLS
Cloud ComputingOrchestration
OVS
OpenFlow-controlled
Ethernet/L2 Switches
Controller
OpenFlow
OVS
OVS
Broker PCEController
OpenFlow
© 2014 ADVA Optical Networking. All rights reserved.77
Direct
Optical Transport and SDNDirect vs. Indirect Model
• How to best extend SDN to transport layer?
• Direct control yields potential benefits at cost of complexity and latency
• Indirect control is easier to implement, and provides a migration path
• Network Hypervisor key element to provide network abstraction, virtualization, and multi-tenancy in abstract model
SDN Controller(Abstract Model)SDN Controller
(Direct Model)
Abstract (Overlay)
Network
Hypervisor
Finding the appropriate level of abstraction is key to virtualization
© 2014 ADVA Optical Networking. All rights reserved.88
8
Abstract Model –
Topology Virtualization Options
Abstract Link
• “You can reach this destination across this domain with these characteristics”
• Paths in the optical domain become links in the virtual topology
• Allows vendor indepedent constraintmodelling
Virtual Node
• Hierarchical abstraction
• Presents subnetwork as a virtual switch
• Simple model, but can be deceptive
• No easy way to advertise “limited cross-connect capabilities”
Virtual Node aggregation
hides internal connectivity
issues and physical
constraints
Abstract Link aggregation
needs compromises and
frequent updates
See also: Aihua Guo, "Network Virtualization", OFC 2014, Monday, M2B.5
© 2014 ADVA Optical Networking. All rights reserved.99
How Transport Fits in SDN Model
Network
Hypervisor
Hypervisor
Orchestration
UserInterfaces
3rd PartyApps
Open for innovation
SDN Controller Optical Network Controller
Management
Fault & Alarms
Configuration
Accounting
Performance
Security
Control
Topology Disc
Path Compute
Provisioning
Resource Mgr
Policy Mgr
Database
Flow DB
Topology DB
Resource DB
Policy DB
Optical Network Hypervisor
Storage Compute Network
Optical Network
Network Hypervisor virtualizes the optical network and presents an abstracted view to the SDN controller
© 2014 ADVA Optical Networking. All rights reserved.1010
Optical Network Hypervisor
WAN is exposed as virtual topology using OpenFlow or Restful API.
SDN Controller #2
SDN Controller #1
SDN Controller #3
SDN Controller #4
Optical Network Controller / HyperVisorFSP SW Suite
SNMP, NETCONF
OF, NETCONF, RESTful API
OF,
NETCONF,
PCEP
OF, PCEPGMPLS-ENNI, BGP-LS
SNMP, MTOSI
OpenFlow PCEP GMPLS-ENNIBGP-LS NETCONF/YANG
REST
Ab
str
acti
on
Physic
alre
ssourc
es
Derived
topolo
gy
© 2014 ADVA Optical Networking. All rights reserved.1111
Network Operation Evolution withSoftware-Defined Networking
Network & Service Mgmt & Apps Control Plane SDN
Existing NM & CP software portfolio will be extendedand complemented with new SDN-based software modules
Abstraction & Virtalization
End-to-End Service Orchestration
Network Programmability
Thank You
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