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Central Office Re-­‐architected as a Datacenter (CORD) Open Networking Lab
In collaboration with AT&T
Telco Central Office
Large number of complex facilities
AT&T alone operates 4-5k Central Offices
Each serves 10-100k residential, enterprise & mobile customers
Evolved piecemeal over the past 40-50 years
Source of huge CAPEX/OPEX costs
Difficult to introduce new services
Especially when compared to OTT cloud providers!
Want the economies of commodity infrastructure
Want the agility of scalable services
CORD = SDN x NFV x Cloud
Resource & Service Management
SDN
NFV
Cloud
Value Proposition
Leverage SDN, NFV and Cloud technologies
and best practices
Reduce CAPEX with virtualized commodity hardware
Reduce OPEX with automated service orchestration
Accelerate time-to-market with cloud provider agility
Add value to existing cloud services with edge footprint
SDN x NFV x Cloud
Source of technology to reduce CAPEX/OPEX
e.g., virtual machines, virtual networks, elastic scaling
Source of services to offer subscribers
Control Plane Services
e.g., VPN, Q-in-Q Termination, MPLS Tunneling,…
Data Plane Services
e.g., Parental Control, WAN Acceleration, NAT,…
Global Cloud Services
e.g., CDN, NoSQL DB, Analytics, Internet-of-Things,…
CORD – Hardware Architecture
Resource and Service Management
PON
OLT
MACs
PON
OLT
MACs
Commodity Servers, Switches, and Storage
ROADM
(Core)
GPON
(Access)
Leaf-Spine
Fabric
CORD – Software Architecture
...
Services
...
Manage
Services
XOS
Manage Fabric and
Host Control Apps
OpenStack
Nova
Virtual Machines
(instantiated on
commodity servers)
Keystone
Neutron
Control
. . . Applications . . .
ONOS
Manage Virtual
Infrastructure
OVX
Virtual Networks and other Flow Rules
(programmed into switching fabric)
Transforming Today’s C.O. into CORD
Virtualize existing hardware devices, producing their
software counterpart running on commodity hardware.
Provide a framework that these software elements (plus
any other cloud services the operator wants to run) can be
plugged into, producing a coherent end-to-end system.
Transforming Today’s C.O. into CORD
Virtualize existing hardware devices, producing their
software counterpart running on commodity hardware.
Provide a framework that these software elements (plus
any other cloud services the operator wants to run) can be
plugged into, producing a coherent end-to-end system.
Devices We Want to Virtualize
Residence/Enterprise
CPE ONU Central Office
OLT ETH AGG BNG Backbone Core Acronyms
•  CPE – Customer Premises Equipment
•  OLT – Optical Line Termination
•  BNG – Broadband Network Gateway
Data Center Devices We Want to Virtualize
Residence/Enterprise
CPE ONU NAT
DHCP
VoIP
Firewall
Parental Control
…
Central Office
OLT ETH AGG BNG Backbone Core Data Center Devices We Want to Virtualize
Residence/Enterprise
CPE ONU Central Office
OLT ETH AGG Authorization
Physical Connect Point
…
BNG Backbone Core Data Center Devices We Want to Virtualize
Residence/Enterprise
CPE ONU Central Office
OLT ETH AGG BNG Backbone Core QoS
VPN
GRE Tunneling
MPLS Tunneling
Q-in-Q Termination
…
Data Center Virtualization Process – Generic
TLA à vTLA
= Merchant Silicon
+ SDN Control Function (Control App running on ONOS)
+ NFV Data Function (Deployed as a Scalable Service)
TLA = Three Letter Acronym
Virtualization Process – Specific
CPE à vCPE
= White-box Switch in the home
+ N/A
+ Container-per-Subscriber
OLT à vOLT
= GPON Interface Card in the Central Office
+ App running on ONOS
+ N/A
BNG à vBNG
= White-box Switching Fabric in the Central Office
+ App running on ONOS
+ N/A
Legacy Central Office
Residence/Enterprise
CPE ONU Central Office
OLT ETH AGG BNG Backbone Core Acronyms
•  CPE – Customer Premises Equipment
•  OLT – Optical Line Termination
•  BNG – Broadband Network Gateway
Data Center vOLT + vCPE + vBNG
Central Office
Residence/Enterprise
Backbone Core ONU vOLT
vCPE
vCPE
vCPE
vBNG
Caution: Once you transform legacy hardware appliances into
their software counterparts, existing bundles will be refactored!
Data Center vOLT + vCPE + vBNG
Central Office
Residence/Enterprise
Backbone Core ONU vOLT
vCPE
vBNG
Data Center Transforming Today’s C.O. into CORD
Virtualize existing hardware devices, producing their
software counterpart running on commodity hardware.
Provide a framework that these software elements (plus
any other cloud services the operator wants to run) can be
plugged into, producing a coherent end-to-end system.
Everything-as-a-Service (XaaS)
(Multi-Tenant)
Service Controller
(Open Interface)
Service Instances (Virtualized Commodity HW) Logically centralized interface
to network-wide functionality
Many points of implementation
distributed across the network.
Everything-as-a-Service
Access-as-a-Service (ACCaaS)
Implemented by vOLT control app running on ONOS
Tenant Abstraction = Subscriber VLAN
Subscriber-as-a-Service (SUBaaS)
SDN
NFV
Implemented by vCPE running in a Linux Container
Tenant Abstraction = Subscriber Bundle
Internet-as-a-Service (INTaaS)
SDN
Implemented by vBNG control app running on ONOS
Tenant Abstraction = Routable Subnet (minimal placeholder)
Content Distribution Network (CDN)
Implemented by a distributed set of caches
Tenant Abstraction = Content Provider
Cloud
Software Architecture
ACCaaS
SUBaaS
INTaaS
CDN
XOS
OpenStack
Nova
Keystone
Neutron
vOLT
vBNG
ONOS
OVX
XOS Manages Tenancy Graph
ACCaaS
SUBaaS
CDN
INTaaS
XOS
(XaaS)
OpenStack
(IaaS)
Legacy Central Office
Residence/Enterprise
CPE ONU Central Office
OLT ETH AGG BNG Backbone Core Acronyms
•  CPE – Customer Premises Equipment
•  OLT – Optical Line Termination
•  BNG – Broadband Network Gateway
Data Center vOLT + vCPE + vBNG
Central Office
Residence/Enterprise
Backbone Core ONU vOLT
vCPE
vCPE
vCPE
vBNG
Data Center CORD
NetGear
(OpenWRT)
PMC Sierra
PON OLT MAC
PICA8
Switch
Central Office
Residence/Enterprise
Backbone Core ONU ACCaaS
With AT&T
Foundry
SUBaaS
Docker
Containers
CDN
Data Center INTaaS
Akamai
LCDN
Proof-of-Concept for
Open Networking Summit
(June 2015)
Summary
Transform legacy C.O. into CORD
Replace closed/proprietary hardware with “Commodity + Software”
Orchestrate software as “Scalable Services”
Leverage Open Source Software
OpenStack – Provision virtual infrastructure
ONOS (ON.Lab) – Host control apps and manage switching fabric
XOS (ON.Lab) – Manage services with XaaS as unifying principle
Path to Deployment
Demonstrate Proof-of-Concept at ONS (June 2015)
Complete CORD POD for AT&T Lab Trials (December 2015)
Join the journey @ onosproject.org
ETSI NFV Architecture
NFV Orchestrator (NFVO)
(HP NFV Director, Telefonica OpenMano)
Element Manager
(Service Controller)
VNF
(Service Instance)
VNFI
VNF Manager (VNFM)
(XOS)
Virtual Infrastructure Manager (VIM)
(OpenStack, vSphere)
Toolkit for building
NFVMs
Unbundle the
NFVO