open-source actn (abstraction and control of te...

Open-source ACTN

(Abstraction and Control of TE Networks)

Young Lee, Huawei USA

Dhruv Dhoddy, Satish Karunanithi, Huawei India

Open Networking Summit 2016

March 16, 2016

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ACTN refers to the set of virtual network operations

needed to orchestrate, control and manage large-scale

multi-domain multi-layer TE networks of both packet and

optical so as to facilitate:

• network programmability

• automation

• efficient resource sharing

• end-to-end service aware connectivity

What is ACTN?


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• IETF

• ITU-T

Standards Work

• ONOS

• ODL

Open Source Project

• Multi-vendor

• Multi-platform

• Multi-domain Multi-layer technology

Demo/

Implementation

Scope of ACTN


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Key Features of ACTN

• A practical approach of Packet/Optical SDN – Enable heterogeneous packet/optical transport network control/management technologies (e.g.,

GMPLS/ASON, PCE, NMS/EMS, OpenFlow)

• SDN controllers’ hierarchy and roles – Customer network controllers (CNC)

– Multi-domain service coordinators (MDSC)

– Physical network controllers (PNC)

• Multi-domain service coordination based on

abstraction/virtualization.

– Distributed data centers dispersed over different domains including wireless backhaul transport,

metro and core networks.

• Support for service-policy enabled network connectivity


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Architecture Goals

• Network Architecture – Carrier-grade controller reliability

– High-performance

– Large-scale support: number of devices

– Federation of controllers

– Recursiveness

• Controller Platform System Architecture – Modularity

– Multiple API support

– Heterogeneous Controllers: ODL, ONOS, others.


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Reference Architecture

CMI

MPI

SBI

Customer

Network

Controller

Physical

Network

Controller

Multi-domain

Service

Coordinator

CNC

MDSC

PNC

CNC CNC

PNC PNC PNC PNC


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Customer Network Controller

CNC

MDSC

PNC

CNC CNC

PNC PNC PNC PNC


In charge of mapping customer VN setup

requests with traffic matrix and customer

policy

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Multi-Domain Service Coordinator

CNC

MDSC

PNC

CNC CNC

PNC PNC PNC PNC


To provide end-to-end path

computation based on E2E

abstraction and path/service

provisioning and virtual service

coordination function.

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Physical Network Controller

CNC

MDSC

PNC

CNC CNC

PNC PNC PNC PNC


This is the function performed by the

domain controller that is responsible for

control plane function of the domain.

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Virtual Network Creation Process

MDSC

Endpoint A

Domain 1

Domain 2

Domain 3

CNC

1. VN Instantiate

6. VN Instantiate Response

VN Traffic Matrix is a set of E2E connectivity

2. VN Instantiate 2. VN

Instantiate

2. VN Instantiate

3. PCEP LSP Initiate

PNC PNC PNC

4. PCEP LSP Report

5. VN Instantiate Response

Endpoint B

Endpoint C

A

B

C

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Interface Recursiveness

VN Query

VN Update

VN Modify/Delete

VN Path Compute

VN Instantiate

Pre VN Instantiation

Post VN Instantiation Pull Model

Push Model

CNC MDSC PNC

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ACTN PNC Cluster Model • Multi-ONOS instances

• Full Redundancy between PNC and

Device.

– This implies that each device is

connected to all PNCs.

– PNCs sends all its resource

discovery to each connected PNC.

• Full Redundancy among the PNC

controller cluster.

– No hierarchy in the PNC cluster.

• Incremental Update directly from device

to the controller for faster topology

update

PNC PNC


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Controller-Controller Redundancy

(Multi-Domain)

PNC PNC

MDSC

MDSC

PNC PNC PNC PNC

Domain 1 Domain 2 Domain 3

How to keep Network Data consistent across all control layers impacts interface/protocol primitives based on policy (push/pull, incremental update, subscription, failure recovery, etc.)

Load Balancing Strategy to increase network reliability Also impacts interface/protocol primitives.

MDSC


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Resource Discovery & Abstraction

PCEP-LS

BGP-LS

Rest/YANG

GRPC

Controller Hierarchy

Stateful Hierarchical PCE

Controller Federation

Virtual Network Control

VN Association With TE-LSPs

Controller State Synchronization

ONOS Cluster Synchronization

ACTN Building Blocks

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PCEP Implementation

ONOS (Domain 3)

ONOS

ONOS (Domain 2)

ONOS (Domain 1)

ACTN

APP

PCEP Speaker

PCEP Speaker

PCEP Speaker

PCEP Speaker

• Stateful H-PCE logic

• Multi-Domain Coordination

• Virtual Network Operation

MDSC: Super Controller

PNC

PCEP/GRPC(?)

(Controller-Controller)

PCEP Interface

(Controller-Device)

ACTN

APP

ACTN

APP

ACTN

APP

• Recursive Interfaces

• Binary interface

• Hierarchical PCE


•Resource Discovery

•Resource Reservation

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Building ACTN Modules (ONOS)

SBI

ACTN APP Abstract Topology

PCRpt/BGP-LS (Topo)

Tunnel Manager

PCInit PCRpt (LSP Incre)

Label Manager

Resource Manager

Open

PCEP/BGP-LS Provider

PCE

PCReq

Physical Topology

VN Control & Orchestration

ONOS Core

Segment Routing

Flow Rule Manager


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ACTN Timeline [ONOS]

Packet Stateful PCE with Initiation

Basic ACTN

• Stateful H-PCE

• VN Association

• No abstraction

ACTN Complete

• Abstraction

• RestConf/Yang

• Policy

Optical Support of

PCEP-LS in SBI and Linc-OE changes

Stateful PCE on Optical network

Basic ACTN with Optical

ACTN Complete with

Optical

May’16 July’16 Oct’16

IETF Bits-n-

Bytes

Seoul

Nov’16


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Inter-Operability Demo Architecture

MDSC

Packet-PNC (Vendor A)

Optical-PNC (Vendor C)

Optical-PNC (Vendor D)

PCEP/RestConf

PCEP/RestConf

PCEP/RestConf

Service initiation

Point (CNC)

Packet-PNC (Vendor B)

Current Participants:

- Ericsson, Huawei, ETRI, SKT


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• Working together with standards body, open-source projects and PoC

demos for an early implementation

• Open ACTN wiki: https://sites.google.com/site/openactn/ for specification

and reference information

• ONOS GitHub:

– https://github.com/opennetworkinglab/onos/tree/master/protocols/pcep

– https://github.com/opennetworkinglab/onos/tree/master/protocols/bgp

• First industry open-source multi-layer, multi-domain packet optical demo

across multiple platform is planned in November 2016 (IETF 97, Seoul,

Korea.)

Summary & Current Status


https://sites.google.com/site/openactn/

https://github.com/opennetworkinglab/onos/tree/master/protocols/pcep

https://github.com/opennetworkinglab/onos/tree/master/protocols/bgp

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