Software Defined Wide Area Network Architectures and Technologies 1st Edition by Cheng Sheng, Jie Bai, Qi Sun ISBN 9780367695774 0367695774

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ISBN 10: 0367695774
ISBN 13: 9780367695774
Author: Cheng Sheng, Jie Bai, Qi Sun

Software Defined Wide Area Network Architectures and Technologies 1st Edition Table of contents:

Chapter 1 WAN Developments

1.1 Evolution of Enterprise WANs

1.2 Challenges Facing Enterprise WANs

1.2.1 Service Cloudification in Full Swing

1.2.2 Network Virtualization Taking Off

1.2.3 NaaS as an Inevitable Trend

1.2.4 Internet-Based Enterprise Communications on the Rise

Chapter 2 Emergence of SD-WAN

2.1 When WAN and SDN Meet…

2.1.1 What is SDN?

2.1.1.1 Application Layer

2.1.1.2 Control Layer

2.1.1.3 Infrastructure Layer

2.1.2 SD-WAN Emerges at the Right Time

2.1.2.1 Gartner

2.1.2.2 MEF

Further Reading

2.2 Interpretation of SD-WAN

2.2.1 Fundamental Characteristics of SD-WAN

2.2.1.1 Hybrid WAN Links, Achieving Flexible Overlay Networking

2.2.1.2 Device Plug-and-Play, Achieving Fast Service Rollout

2.2.1.3 High-Performance Branch Devices, Achieving Application-Centric Full-Service Processing

2.2.1.4 Service Intent-Oriented Network Orchestration and Automated Service Rollout

2.2.1.5 On-Demand, Efficient Cloud Connectivity

2.2.1.6 Intelligent Traffic Steering, Guaranteeing Application Experience

2.2.1.7 WAN Optimization, Improving WAN Transmission Quality

2.2.1.8 Secure, Reliable Connectivity

2.2.1.9 Centralized, Visualized Management and Control, Facilitating O&M

2.2.1.10 Open Northbound APIs, Implementing Programmable SD-WAN

2.2.2 Core Benefits of SD-WAN

2.2.2.1 Robust Connectivity: Flexible Networking, Building On-Demand Multi-cloud and Multi-network Connectivity

2.2.2.2 Superior Experience: Application-Based Traffic Steering and Optimization, Ensuring High-Quality Experience of Key Applications

2.2.2.3 High Performance: Superb Branch Devices, Ideal for Building a New Forwarding Engine

2.2.2.4 Easy O&M: Intent-Driven, Simplified Network O&M for Branches

Chapter 3 Introduction to the SD-WAN Solution

3.1 SD-WAN Solution

3.1.1 SD-WAN Architecture Design

3.1.1.1 Network Layer

3.1.1.2 Control Layer

3.1.1.3 Service Layer

3.1.2 Key Interaction Interfaces and Protocols

3.1.2.1 Management Channel

3.1.2.2 Control Channel

3.1.2.3 Data Channel

3.1.2.4 YANG Model

3.1.2.5 Restful API

3.1.3 Key Service Processes

3.2 Business Models of SD-WAN

3.2.1 Definition of Business Roles

3.2.1.1 SD-WAN Solution Provider

3.2.1.2 End Users of the SD-WAN Solution

3.2.1.3 SD-WAN Service Provider

3.2.2 Carrier/MSP Resale Model

3.2.2.1 Multi-tenant Management

3.2.2.2 IWG

3.2.2.3 POP Networking

3.2.2.4 VAS

3.2.2.5 IPv6

3.2.2.6 Northbound Open APIs, Easy to Integrate

3.2.3 Enterprise-Built Model

3.3 Panorama of the SD-WAN Solution

3.3.1 Networking Sub-solution

3.3.2 Application Experience Sub-solution

3.3.3 Security Sub-solution

3.3.4 O&M Sub-solution

Chapter 4 Starting from Sites

4.1 Site Types

4.2 CPE: “Spokesperson” of Sites

4.2.1 Diverse CPE Forms

4.2.2 CPE: Connecting Sites

4.2.2.1 WAN-Side Connection

4.2.2.2 LAN-Side Connection

4.2.3 Dual-Gateway Interconnection

4.3 Key Capabilities of CPEs

4.3.1 Traditional CPE

4.3.2 Convergent CPE

4.3.3 SD-WAN CPE

4.4 CPE Plug and Play

4.4.1 Fundamentals

4.4.1.1 A CPE Connects to a WAN

4.4.1.2 The CPE Connects to the SDN Controller

4.4.1.3 The SDN Controller Delivers Configurations

4.4.2 Deployment Practices

4.4.2.1 Email-Based Deployment

4.4.2.2 Registration Center-Based Deployment

4.4.2.3 USB-Based Deployment

4.4.2.4 DHCP-Based Deployment

Chapter 5 Site Interconnection

5.1 SD-WAN Networking Overview

5.1.1 Networking Scenario Analysis

5.1.2 Networking Design Principles

5.2 Overlay Network Design

5.2.1 Diversified Network Topologies

5.2.1.1 Single-Layer Network Topology

5.2.1.2 Hierarchical Network Topology

5.2.2 SD-WAN Network Model

5.2.2.1 MEF-Defined SD-WAN Network Model

5.2.2.2 Huawei’s Definition of the SD-WAN Network Model

5.2.3 VPN Design

5.2.3.1 VPN Isolation at Sites

5.2.3.2 VPN Isolation in Tunnels

5.2.4 Tunnel Design

5.2.4.1 SD-WAN Tunnel Design Principles

5.2.4.2 IP Overlay Tunnel Technology

5.2.5 Routing Design

5.2.5.1 EVPN Fundamentals

5.2.5.2 EVPN-Based Enhanced SD-WAN Routing Solution

5.3 Network Reliability Design

5.3.1 Network Link Reliability Design

5.3.1.1 Full Interconnection between CPEs and the Underlay Network

5.3.1.2 Each CPE Connects to Only One Underlay Network

5.3.2 Network Device Reliability Design

5.3.3 Core Site Reliability Design

5.3.3.1 Hub Site Redundancy Design

5.3.3.2 Redirect Site Redundancy Design

5.4 Network Orchestration and Automation

5.4.1 Fundamentals of Network Orchestration

5.4.1.1 Point: Abstraction of Single-Point NE Functions

5.4.1.2 Line: Abstraction of Network Connectivity Functions

5.4.1.3 Plane: Abstraction of Networking Functions

5.4.2 Tunnel Orchestration

5.4.2.1 Overlay Tunnel Establishment

5.4.2.2 Examples of Overlay Tunnel Orchestration

5.4.3 Topology Orchestration

5.4.3.1 Hub-Spoke

5.4.3.2 Full-Mesh

5.4.3.3 Partial-Mesh

5.4.3.4 Hierarchical

5.5 Internet Access

5.5.1 Local Internet Access

5.5.2 Centralized Internet Access

5.5.2.1 Intra-area Centralized Internet Access

5.5.2.2 Global Centralized Internet Access

5.5.3 Hybrid Internet Access

5.6 WAN NAT Traversal

5.6.1 NAT Mapping and Filtering

5.6.1.1 Full Cone NAT

5.6.1.2 Restricted Cone NAT

5.6.1.3 Port-Restricted Cone NAT

5.6.1.4 Symmetric NAT

5.6.2 NAT Detection and Hole Punching

5.7 Interconnection with Legacy Sites

5.7.1 Interconnection through an SD-WAN Site

5.7.1.1 Back-to-Back Interconnection

5.7.1.2 Local Interconnection

5.7.2 Interconnection through an IWG

5.7.2.1 Option A

5.7.2.2 Option B

5.7.2.3 Reliability Design

5.8 POP Networking

5.8.1 Concepts and Principles

5.8.2 Solution Design

5.8.2.1 POP Gateway

5.8.2.2 Site

5.8.3 Solution Highlights

5.9 Flexible Connection to Public Clouds

5.9.1 Cloud Concepts and Basic Principles

5.9.2 Cloud-Network Synergy Scenario Analysis

5.9.2.1 Connecting Branch Sites to the Public Cloud

5.9.2.2 Hybrid Cloud

5.9.3 Public Cloud Connection Solution

5.9.3.1 IPsec VPN Gateway Solution

5.9.3.2 vCPE Cloud Site Solution

5.9.3.3 Multi-tenant Cloud Gateway Solution

5.9.4 Hybrid Cloud Solution

5.9.4.1 Interconnection between Private and Public Clouds

5.9.4.2 Heterogeneous Public Cloud Interconnection

Chapter 6 Guaranteed Application Experience

6.1 Assurance Solution

6.2 Application Identification

6.2.1 Application Classification

6.2.1.1 Production Applications

6.2.1.2 Collaboration Applications

6.2.1.3 Cloud Applications

6.2.1.4 Entertainment Applications

6.2.2 FPI

6.2.2.1 Protocol Identification

6.2.2.2 DNS Correlation Identification

6.2.3 SA

6.2.3.1 Packet Signature Identification

6.2.3.2 Correlation Identification

6.2.3.3 Behavior Identification

6.2.3.4 Network-Wide Synchronous Identification

6.3 Application-Based Traffic Steering

6.3.1 Traffic Steering Scenarios

6.3.1.1 Link Quality-Based Traffic Steering

6.3.1.2 Link Load-Based Traffic Steering

6.3.1.3 Application Priority-Based Traffic Steering

6.3.2 Quality Detection

6.3.2.1 Packet Loss Rate

6.3.2.2 Two-Way Latency

6.3.2.3 Jitter

6.3.3 Traffic Steering Policy

6.3.3.1 Configuring Traffic Steering Policies

6.3.3.2 Updating Traffic Steering Policies

6.3.3.3 Applying Traffic Steering Policies

6.3.4 Configuration Practices

6.4 QoS Solution

6.4.1 Overall Solution

6.4.1.1 Site-to-Site Rate Limiting

6.4.1.2 Site-to-Gateway Rate Limiting

6.4.2 Site-to-Site Rate Limiting

6.4.2.1 QoS Implementation in the Outbound Direction

6.4.2.2 QoS Implementation in the Inbound Direction

6.4.3 Site-to-Gateway Rate Limiting

6.4.3.1 Site-to-IWG Rate Limiting

6.4.3.2 Site-to-POP Gateway Rate Limiting

6.5 WAN Optimization

6.5.1 Conventional WAN Optimization Solutions

6.5.1.1 Packet Loss Mitigation

6.5.1.2 Transmission Optimization

6.5.1.3 Data Optimization

6.5.1.4 Application Protocol Optimization

6.5.2 Packet Loss Mitigation Technologies

6.5.2.1 FEC Algorithm: Recovers Lost Packets

6.5.2.2 A-FEC: Automatically Adjusts the Redundancy Rate

6.5.2.3 Multi-Path Packet Replication: Mitigates Packet Loss

6.5.2.4 Multi-Path FEC: Mitigates Packet Loss

6.5.3 Transmission Optimization Technologies

6.5.3.1 Why Is Optimization for TCP-Based Transmission Necessary?

6.5.3.2 BBR: Optimization at the Transmit End

6.5.3.3 FillP: Dual-End Optimization

6.5.4 Third-Party WAN Optimization Technologies

6.5.4.1 Data Deduplication and Compression

6.5.4.2 Optimization Technologies for Web Pages and Web-Based Applications

6.5.4.3 Optimization Technologies for File Transfer and Database Access Protocols

6.5.4.4 Video Optimization Technologies

6.5.4.5 SaaS Application Optimization Technologies

6.6 Intent-Driven Application Experience Optimization

6.6.1 Experience Optimization

6.6.2 Centralized Configuration Approach

6.6.3 Convergent Scheduling Approach

Chapter 7 Security: Top Priority

7.1 New Security Challenges

7.2 System Security

7.2.1 Component Security

7.2.1.1 SDN Controller

7.2.1.2 CPE

7.2.2 Inter-component Communication Security

7.2.2.1 Basic Principles of Authentication, Encryption, and Verification

7.2.2.2 Access Authentication Based on Zero Trust

7.2.2.3 Data Protection Using Secure Communication Protocols

7.2.2.4 Security Isolation in a Multi-tenant Scenario

7.3 Service Security

7.3.1 Site-to-Site

7.3.2 Site-to-Internet

7.3.2.1 Built-in Security Functions of CPEs

7.3.2.2 VAS-Based Advanced Security Protection Functions of uCPEs

7.3.3 Site-to-Cloud

Chapter 8 Easy O&M

8.1 O&M Mode Transformation

8.2 O&M Architecture

8.3 O&M Permission Control

8.3.1 O&M Mode and Management Roles

8.3.1.1 System Administrator

8.3.1.2 MSP Administrator

8.3.1.3 Tenant Administrator

8.3.2 Role-Based Permission Control

8.4 Network-Wide Monitoring Capabilities

8.4.1 Dashboard View

8.4.2 Network-Wide Monitoring

8.4.2.1 Alarm Monitoring

8.4.2.2 Overlay Network Topology Monitoring

8.4.2.3 Site Monitoring

8.4.2.4 Inter-site Monitoring

8.4.3 Quality Prediction

8.4.3.1 Link-Based Network Quality Prediction

8.4.3.2 Application-Based Network Quality Prediction

8.5 Fault Locating Assistant

8.5.1 Diagnosis Tools

8.5.1.1 Application Quality Diagnosis

8.5.1.2 Network Diagnosis

8.5.1.3 Device Diagnosis

8.5.2 Device Maintenance

8.5.2.1 Device Upgrade and Downgrade

8.5.2.2 Device Replacement

8.5.3 Log Management

8.5.4 Intelligent Troubleshooting

8.6 Migration from Traditional Networks to SD-WAN

8.6.1 Headquarters/DC Site Migration

8.6.1.1 Connecting a Single SD-WAN CPE in Off-Path Mode

8.6.1.2 Connecting Two SD-WAN CPEs in Off-Path Mode

8.6.2 Branch Site Migration

8.6.2.1 Directly Replacing or Upgrading a Legacy CE

8.6.2.2 Connecting SD-WAN CPEs in Off-Path Mode

Chapter 9 SD-WAN Best Practices

9.1 SD-WAN Application Scenarios

9.2 Typical SD-WAN Cases

9.2.1 SD-WAN in Finance

9.2.1.1 Scenario Analysis

9.2.1.2 Solution Design

9.2.2 SD-WAN in Large Enterprises

9.2.2.1 Scenario Analysis

9.2.2.2 Solution Design

9.2.3 SD-WAN in Carriers

9.2.3.1 Scenario Analysis

9.2.3.2 Solution Design

9.2.4 SD-WAN in MSPs

9.2.4.1 Scenario Analysis

9.2.4.2 Solution Design

Chapter 10 SD-WAN Components

10.1 Netengine Ar Series Routers

10.1.1 Overview

10.1.2 Application Scenarios

10.1.2.1 Constructing SD-WAN Using Hybrid Links

10.1.2.2 Building Different Types of VPNs over the Internet

10.1.3 Functions and Features

10.1.3.1 High Performance

10.1.3.2 High Reliability

10.1.3.3 Easy O&M

10.1.3.4 Service Integration

10.1.3.5 Security

10.1.3.6 SD-WAN Ready

10.2 Imaster NCE-WAN

10.2.1 Introduction

10.2.2 Technical Highlights

10.2.2.1 Fast Deployment Accelerates SD-WAN Service Rollouts

10.2.2.2 Intelligent Traffic Steering Improves Service Experience

10.2.2.3 On-Demand VASs Speed Up Service Provisioning

10.2.2.4 Visualized O&M Offers Network-Wide Application Traffic Visibility

10.2.3 Functions and Features

10.2.3.1 Plug-and-Play

10.2.3.2 Tunnel Management

10.2.3.3 Intelligent Traffic Steering

10.2.3.4 On-Demand VASs

10.2.3.5 Visualized O&M

10.2.3.6 Performance Monitoring

10.2.3.7 Log Management

Chapter 11 SD-WAN Outlook

11.1 Technology Evolution

11.1.1 5G

11.1.1.1 Scenario 1: “5G + SD-WAN” for Unstaffed Bank Branches

11.1.1.2 Scenario 2: “5G + SD-WAN” for Smart Bank Branch Interconnection

11.1.2 SRv6

11.1.2.1 SR Overview

11.1.2.2 SRv6 Overview

11.1.3 AI

11.2 New Industry Changes

11.3 Review and Prospect

Acronyms and Abbreviations

References

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