Enabling Virtual Transport Network Service

Vishnu Shukla

OIF Carrier Working Group Chair

Verizon, USA

Globecom 2015

San Diego, CA, USA

December 8, 2015

Outline

• Network and emerging usage

• Virtual Transport Network Service (VTNS)

• Use cases

• OIF role

• Challenges

We’re Using the Network in a New Way

Paek period Traffic composition 1H2014/

A new kind of business customer

• Using both private and public clouds

• Elastic Compute and storage requires an elastic network with on demand services

A new network is needed that supports:

• Bandwidth on demand to match compute/storage on demand technology

• Multi-tenant

• Higher Utilization and greater efficiency

A new kind of service Provider

• Supplies SaaS, IaaS, PaaS

• Elastic compute and storage

• Multi-tenant

A new kind of Consumer

• Living in the cloud, mobile

• Applications are hosted in the cloud

• Shifting from download to streaming

• News events and new applications load the network in new ways

• Mobile

• Data, Data,…

Source: Coriant

Verizon Approach

• Automation

• Virtualization

• SDN

• Increased use of open source software and commodity hardware

• Flexible architecture

Ensures Verizon is not locked into a single technology or strategy

More than 70% of Verizon back office support systems are now fully

virtualized creating powerful efficiencies

Verizon Approach (cont.)

• Develop Vendor Ecosystem

- Leverage knowledge of some of our key suppliers

- Manage and coordinate SDOs

Virtualization

• Sharing of Transport Network Resources

• No dedicated resources

• Dynamically allocated

• Isolating traffic between different services

• Limited to service endpoints

• Exposing control at abstract level

• Varying levels

Virtual Network Service Definition

Take advantage of virtualization in SDN

Offer customers controllable network slice

Fixed Connection

Dynamic Connection

Dynamic Connection

Client site A

Client site B

Client site A

Client site B

Client site D

Client site C

Client site A

Client site B

Client site D

Client site C

Virtual network with vNE & vLink

Client controller

Ctrl of virtual XC

Connection controlled by network providers

Leased Line

Endpoints Only Fixed virtual

network topology

Static

Dynamic Dynamic Connection

Virtual network with vNE & vLink

Client controller Rent virtual network

resources from provider

Client site

Virtual network recursive creation

Client site Client site

Client site

Client site

Client site Client site

Dynamic/recursive virtual network topology

Working Protection

Request On Line

Real-time planning

Real-time setup

Autonomous Control

Dynamic expansion

Optimization

• Multi-level SLA

• Recovery

• Network migration Physical Optical Network

Virtual Network Topology

Network as a Service

Online Slicing

Path Computation

Survivability Analysis

Global Optimization

Tenants Seconds

Online

T-SDN

Controller

Benefits

Real Time

Resilient

Robust

Transport Network Virtualization Use Cases

• Private Cloud

• More dynamic optical tunnels on-demand

• Data Center Interconnect (DCI)

• Integrate transport network with DC orchestration

• Integrated Packet and Optical Network

• Reconfigure optical domain based on IP

Transport

Controller

Physical

Infrastructure

Controls Physical Network

Control Layer

Infrastructure Layer

Transport Network

Today’s Model for SDN-Enabled Transport Network

Application Layer

App App App

App controls exposed topology

Transport

Controller

Control Data Plane Interface

Infrastructure Layer

Application Layer

App App App

Control Layer

Client

Controller

SDN Control & Network Virtualization

Network Device

Control Virtual Network Interface

Northbound Interface

Business Boundary

Transport

Controller

Physical

Infrastructure

Controls Physical Network

Transport Control Layer

Infrastructure Layer

Transport Network

Introducing the Client Layer Control

Application Layer

App App App

Client Controls Virtual

Transport Network

Client Control Layer

App App App

Client

Controller 2

App controls exposed topology

VTN Topology 2

Client

Controller 1

VTN

Topology 1

Physical

Infrastructure

Controls Physical Network

Transport Control Layer

Infrastructure Layer

Transport Network

OIF Virtual Transport Network Services

Application Layer

App App App

Client Control Layer

App App App

App controls exposed topology

Transport

Controller

Client

Controller 2

VTN Topology 2

Client

Controller 1

VTN

Topology 1

Client Controls Virtual

Transport Network

Controls Physical Network

Provider

Control

Layer

Infrastructure Layer

Enables Transport Network as a Service

Application Layer

App App App

Client Control Layer

App controls exposed topology

Transport

Controller A

VTN Topology B

Client

Controller 1

VTN

Topology A

Client Controls

Virtual Network

Transport Network A Transport Network B

Transport

Controller B

Cloud DC Cloud DC

DC

Controller

DC

Controller

Carrier

Network

Connection

Type 1 – Fixed Connection

Carrier

Network

Connection

Type 2 – Dynamic Connection Topology Exposes Endpoints

VTN

Topology

Carrier

Network

Connection

VTN

Topology

Type 3 – Dynamic Connection Fixed Topology

Type 4 – Dynamic Connection Dynamic Virtual Topology

Carrier

Network

VTN

Topology

Connection

What is OIF defining?

• Service Attributes

• Service Capabilities

• Recovery Requirements

• OAM Requirements

Harmonize Services Definitions for all players, i.e.

Transport Network Services

- Providers

- Users

- Equipment/SW Vendors

Service Attributes

• Service

• ID / name

• Service End Points

• Type of Service

• Topology

• ID / name

• Service Level Agreement

• Connection

• Type of Connection

• TE Parameters

• Traffic Matrix

• Scheduling

• Service Level Agreement

Service Capabilities

• Connection – Is the customer allowed to

• Create

• Delete

• Modify

• Query

• Receive automatic status updates?

• Topology – Is the customer allowed to

• Create

• Delete

• Modify

• Query

• Receive automatic status updates?

Recovery

• Connection Level Protection/Restoration

• May be provided by service provider or customer

• Topology Level Protection/Restoration

• Provided by provider

• How to use both levels

• Coordination mechanism when customer is responsible

for connection recovery

Client Connection Recovery

Carrier

Network

Connection

VTN Topology

Failu

re no

tificatio

n

Provider Connection Recovery

Carrier

Network

Connection

VTN Topology

Failu

re notifica

tion

– H

old

on

Reco

very

F

ailu

re notifica

tion

– rep

aired

Provider Topology Recovery

Carrier

Network

Connection

VTN Topology

Failu

re notifica

tion

– h

old

on

recov

ery

Failu

re notifica

tion

– rep

aired

OAM

• East-West • Virtual Link OAM requirements

• North-South • VTN Topology / Connection

• Query/automatic Status Requirements

Carrier

Network

Connection

VTN

Topology Transport

Controller

Client

Controller

North-South

OAM East-West OAM

Challenges

• Operational simplicity • On-board new clients rapidly

• Differentiated service delivery • Automate resource allocation on the fly

• Scalability • Support X transactions per hour

• Security • Service isolation and authentication per client

• Continuous Availability • Disaster avoidance / recovery

• Current transport business model

• Migration Path

• Many SDOs, Open source activities

• Common Information Model

SDOs

ONF

OIF (Transport)

IETF/IRTF

InterDC

ATIS

SW Infrastructure

Southbound Interface

Northbound Interface

Openstack

BBF, MEF

ODL,

NFV

OPNFV

OPEN

SOURCE

3GPP

High Level SDN/Data Center Reference Architecture with SDOs/Forums Focus

Data Center HW

Orchestration & Management

Service Service Service

Transport

SDN Controller

DC

Mgt

ONOS

Summary

• Changing networking paradigms

• SDN has great promise to improve transport control

• Programmability

• Ability to deliver new behaviors not (yet) considered by

standards, vendors, …

• Simplified multi-layer control

• Common behaviors in heterogeneous NE deployments

• Operational issues

• Role of SDOs

• Monetizing network

Thank You!

www.oiforum.com

Agenda

Transport SDN Drivers, Needs, Challenges

• Dave Brown, OIF VP of Marketing; Alcatel-Lucent

Global Transport SDN Prototype Demo

• Jonathan Sadler, OIF Technical Committee Vice Chair; Coriant

SDN Framework and APIs

• Lyndon Ong, OIF Market Awareness and Education Committee Co-Chair;

Ciena

Virtual Transport Network Service

• Vishnu Shukla, OIF Carrier Working Group Chair; Verizon

Wrap up