Check out the slides Achim Autenrieth presented at this year's MPLS SDN World Congress in Paris

1. Achim Autenrieth, ADVA Optical Networking
MPLS SDN World Congress 2014
March 18-21, 2014 / Paris, France
GMPLS, SDN, Optical
Networking, Control Plane

2. © 2014 ADVA Optical Networking. All rights reserved.22
Cloud Connectivity: What Is Hot?
Network Virtualization
Programmable WAN connectivity
with open SDN implementation
Business Continuity
Low-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, Cisco
Data Center Connectivity
Cloud services drive demand for
dynamic high-speed data center connectivity

3. © 2014 ADVA Optical Networking. All rights reserved.33
NMS / CP / SDN
Mission Key Facts
Transport SDN for Flexible Optical Networks
• Datacenter
Connectivity
• Cloud Bursting
• Secure multi-
tenancy
• Global network
visibility with
“real-time”
control
• De-couple virtual
from physical
network
• NFV support
From cloud access to optical
Terabit/s connectivity
Use Cases and Drivers Enablers
DC Site 1
MAN / WAN
DC Site NEnterprise
Tenant B cloud
Tenant C cloudTenant A cloud
• Network
Abstraction
• Virtualization
• Open &
standardized
interfaces
• Multi-tenancy
capability
• Integration
with existing
OSS / NMS /
CP
SDN turns the network into a programmable resource

4. © 2014 ADVA Optical Networking. All rights reserved.44
What is SDN?
Open Networking Foundation white paper
In the SDN architecture, the control and data planes are decoupled, network
intelligence and state are logically centralized, and the underlying network
infrastructure is abstracted from the applications.
• SDN is an architectural framework for creating intelligent networks that are
programmable, application aware, and more open.
• SDN allows the network to transform into a more effective business enabler.
• SDN enables applications to request and manipulate services provided by the
network and allows the network to expose network state back to the
applications.
• A key aspect to the architectural framework is the separation of forwarding from
control plane, and establishment of standard protocols and abstractions
AT&T Domain 2.0 Vision white paper
How does SDN apply to Optical Transport Networks?

5. © 2014 ADVA Optical Networking. All rights reserved.55
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.

6. © 2014 ADVA Optical Networking. All rights reserved.66
Packet Switch != Optical Switch
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
Path feasibility Implicit Dep. on signal quality
Path set-up Any order Sequential
Target: Optical layer connectivity but hiding optical complexity

7. © 2014 ADVA Optical Networking. All rights reserved.77
Optical Network != Generic Hardware
Connectivity & Topology Discovery
Signal Mapping & Format Compatibility
Optical Performance Constraints
Sequential Lightpath Setup/Teardown
Optical Power Balancing
OSC
(Out-of-band)
a) 40km
b) 60km
c) 20km
a)
b)
c)
d)
d)
WSS
WSS
WSS
WSS
WSS
Fixed / Tunable
transponders
External
Wavelengths
Regenerators
Colorless
Module(s)
Line Ports
Directionless
Module

8. © 2014 ADVA Optical Networking. All rights reserved.88
“Legacy”Transport
Network
programmability
HW abstraction
and virtualization
Centralized
management & control
Flow/circuit oriented
data plane
SDN vs. “Legacy” Optical Transport
Separation of data
and control plane 




SDN Principles
Top-down approach:
Facilitate optical layer virtualization & programmability.

9. © 2014 ADVA Optical Networking. All rights reserved.99
• GMPLS *is* SDN (or a functional component of SDN)
• Control and Data plane separation was a basic design
principle together with Centralized Control & Hardware
Abstraction:
see ASON - RFC4397/4652
• Transport node<Data Plane> is a logical network device (…)
originating and/or terminating of a data flow and/or switching
(…).
• Controller<Control Plane> is a logical entity that models all
control plane intelligence (routing, traffic engineering (TE), and
signaling protocols, path computation, etc.). A single controller
can manage one or more transport nodes.
SDN/GMPLS for Optical Networks
How to leverage existing GMPLS control plane for SDN?

10. © 2014 ADVA Optical Networking. All rights reserved.1010
• 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 and
virtualization enables
homogeneous service activation
processes
• Coordinate the deployment
of services controlled by
either GMPLS or OpenFlow
End to End Service Orchestration
with GMPLS as Internal Signaling Protocol
DC
Eth. Aggr.
OpenFlow-
controlled
Ethernet
Aggregation
WAN
GMPLS-controlled
virtual (o real)
WSON/SSON
GMPLS
Cloud Computing
Orchestration
OVS
SDN
Ctrl.
OpenFlow-
controlled
Ethernet/L2
Switches
OpenFlow
OVS
OVS
PCE
OpenFlow
SDN
Ctrl.
SDN
Ctrl.
?

11. © 2014 ADVA Optical Networking. All rights reserved.1111
How Transport Fits in SDN Model
Network
Hypervisor
User
Interfaces
3rd Party
Apps
Transport
Apps
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
Network
Hypervisor
Storage Compute
Optical
Network
Orchestration
SDNSDN Controller
Orchestration
• Hypervisors allowed Storage and Compute
resources to be managed together.
• SDN allowed Networking to join through an
Orchestration layer
• Transport is added by extending the SDN
controller function.
Network Hypervisor virtualizes the optical network and presents an
abstracted view to the SDN controller

12. © 2014 ADVA Optical Networking. All rights reserved.1212
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 independent constraint
modelling
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, M2B.5

13. © 2014 ADVA Optical Networking. All rights reserved.1313
Optical Network Hypervisor
WAN is exposed as virtual topology using OpenFlow or Restful API.
SDN
Controller #2
SDN
Controller #1
Provider
Controller
SDN
Controller #3
Optical Network Controller / HyperVisor
FSP SW Suite
SNMP,
NETCONF
OF, NETCONF,
RESTful API
OF,
NETCONF,
PCEP
OF, PCEP, NETCONF
GMPLS-AL, BGP-LS
SNMP,
MTOSI
OpenFlow PCEP GMPLS-ALBGP-LS NETCONF/YANG
REST
AbstractionPhysicalressourcesDerivedtopology
GMPLS
TED LSPDBPCE

14. © 2014 ADVA Optical Networking. All rights reserved.1414
Demonstration of SDN Use Cases
ECOC 2013 Postdeadline Paper
ECOC 2012 ECOC 2012 Postdeadline Paper
OFC/NFOED 2013

15. © 2014 ADVA Optical Networking. All rights reserved.1515
STRAUSS SDN Orchestration Testbed
SDN Network
Orchestration
ABNO
Controller
PCE
GMPLS-enabled
Flexi-grid
DWDM domain
Active Stateful
PCE
TED LSPDBTED
Topology
Server
VNTM
Topology
Server OPS
Flow
Server
Provisioning
Manager
TREMA
Controller
REST API
OpenFlow
OpenFlow-
enabled
OPS/Flexi-grid
DWDM domain
NOX
Controller
REST API
OpenFlow
OpenFlow-
enabled OPS
DWDM domain
OpenFlow
Controller
REST API
Network
Hypervisor
OpenFlow +
GMPLS enabled
DWDM domain
OCS
OPS OCS
TED LSPDB
www.ict-strauss.eu
@ICTstrauss

16. © 2014 ADVA Optical Networking. All rights reserved.1616
SDN Enables Optical Network
Operation and Control Innovation
Datacenter Connectivity Network Virtualization & Orchestration
Multilayer Optimization Open Application Framework

17. © 2014 ADVA Optical Networking. All rights reserved.1717
Optical Transport Network Evolution with
Software Defined Networking
Network & Service
Mgmt & Apps Control Plane SDN
Existing NM & CP software portfolio will be extended
and complemented with new SDN-based software modules
Abstraction & Virtualization
End-to-End Service Orchestration
Network Programmability




18. Thank You
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aautenrieth@advaoptical.com