SRv6 Network Programming Ushering in a New Era of IP Networks 1st Edition by Zhenbin Li, Zhibo Hu, Cheng Li ISBN 9781032016245 1032016248

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ISBN 10: 1032016248
ISBN 13: 9781032016245
Author: Zhenbin Li, Zhibo Hu, Cheng Li

SRv6 Network Programming Ushering in a New Era of IP Networks 1st Edition Table of contents:

Part I Introduction

Chapter 1 ▪ SRv6 Background

1.1 Overview of Internet Development

1.2 Start of All IP 1.0: A Complete Victory for IP

1.2.1 Competition between ATM and IP

1.2.2 MPLS: The Key to All IP 1.0

1.3 Challenges Facing All IP 1.0: IP/MPLS Dilemma

1.3.1 MPLS Dilemma

1.3.2 IPv4 Dilemma

1.3.3 Challenges for IPv6

1.4 Opportunities for All IP 1.0: SDN and Network Programming

1.4.1 OpenFlow

1.4.2 POF

1.4.3 P4

1.4.4 SR

1.5 Key to All IP 2.0: SRv6

1.6 Stories behind SRv6 Design

References

Part II SRv6 1.0

Chapter 2 ▪ SRv6 Fundamentals

2.1 SRv6 Overview

2.2 Network Instructions: SRv6 Segments

2.3 Network Nodes: SRv6 Nodes

2.3.1 SRv6 Source Node

2.3.2 Transit Node

2.3.3 Endpoint Node

2.4 Network Program: SRv6 Extension Header

2.4.1 SRv6 Extension Header Design

2.4.2 SRH TLVs

2.4.2.1 Padding TLV

2.4.2.2 HMAC TLV

2.4.3 SRv6 Instruction Set: Endpoint Node Behaviors

2.4.3.1 End SID

2.4.3.2 End.X SID

2.4.3.3 End.T SID

2.4.3.4 End.DX6 SID

2.4.3.5 End.DX4 SID

2.4.3.6 End.DT6 SID

2.4.3.7 End.DT4 SID

2.4.3.8 End.DT46 SID

2.4.3.9 End.DX2 SID

2.4.3.10 End.DX2V SID

2.4.3.11 End.DT2U SID

2.4.3.12 End.DT2M SID

2.4.3.13 End.B6.Insert SID

2.4.3.14 End.B6.Encaps SID

2.4.3.15 End.BM SID

2.4.4 SRv6 Instruction Set: Source Node Behaviors

2.4.4.1 H.Insert

2.4.4.2 H.Encaps

2.4.4.3 H.Encaps.L2

2.4.5 SRv6 Instruction Set: Flavors

2.4.5.1 PSP

2.4.5.2 USP

2.4.5.3 USD

2.5 Network Program Execution: SRv6 Packet Forwarding

2.5.1 Local SID Table

2.5.2 Packet Forwarding Process

2.5.2.1 Step 1: Processing on SRv6 Source Node A

2.5.2.2 Step 2: Processing on Endpoint Node B

2.5.2.3 Step 3: Processing on Transit Node C

2.5.2.4 Step 4: Processing on Endpoint Node D

2.5.2.5 Step 5: Processing on Transit Node E

2.5.2.6 Step 6: Processing on Endpoint Node F

2.6 Advantages of SRv6 Network Programming

2.6.1 Superior Backward Compatibility and Smooth Evolution

2.6.2 High Scalability and Simple Deployment in Cross-Domain Scenarios

2.6.3 Networking Programming for Building Intelligent Networks

2.6.4 All Things Connected through an E2E Network

2.7 Stories behind SRv6 Design

References

Chapter 3 ▪ Basic Protocols for SRv6

3.1 IS-IS Extensions

3.1.1 IS-IS SRv6 Fundamentals

3.1.2 IS-IS Extensions for SRv6

3.1.2.1 SRv6 Capabilities Sub-TLV

3.1.2.2 Node MSD Sub-TLV

3.1.2.3 SRv6 Locator TLV

3.1.2.4 SRv6 End SID Sub-TLV

3.1.2.5 SRv6 End.X SID Sub-TLV

3.1.2.6 SRv6 LAN End.X SID Sub-TLV

3.1.2.7 SRv6 SID Structure Sub-Sub-TLV

3.2 OSPFv3 Extensions

3.2.1 OSPFv3 SRv6 Fundamentals

3.2.2 OSPFv3 Extensions for SRv6

3.2.2.1 SRv6 Capabilities TLV

3.2.2.2 SR Algorithm TLV

3.2.2.3 Node MSD TLV

3.2.2.4 OSPFv3 SRv6 Locator LSA

3.2.2.5 SRv6 Locator TLV

3.2.2.6 SRv6 End SID Sub-TLV

3.2.2.7 SRv6 End.X SID Sub-TLV

3.2.2.8 SRv6 LAN End.X SID Sub-TLV

3.2.2.9 Link MSD Sub-TLV

3.2.2.10 SRv6 SID Structure Sub-Sub-TLV

3.3 Stories behind SRv6 Design

References

Chapter 4 ▪ SRv6 TE

4.1 SR-TE Architecture

4.1.1 Traditional MPLS TE Architecture

4.1.2 Centralized SR-TE Architecture

4.2 BGP-LS for SRv6

4.2.1 BGP-LS Overview

4.2.2 BGP-LS Extensions for SRv6

4.2.2.1 SRv6 SID NLRI

4.2.2.2 SRv6 SID Information TLV

4.2.2.3 SRv6 Endpoint Function TLV

4.2.2.4 SRv6 BGP Peer Node SID TLV

4.2.2.5 SRv6 SID Structure TLV

4.2.2.6 SRv6 Capabilities TLV

4.2.2.7 SRv6 Node MSD Types

4.2.2.8 SRv6 End.X SID TLV

4.2.2.9 SRv6 LAN End.X SID TLV

4.2.2.10 SRv6 Locator TLV

4.3 PCEP for SRv6

4.3.1 PCE Overview

4.3.2 Stateful PCE

4.3.3 PCEP Extensions for SRv6

4.3.3.1 SRv6 PATH-SETUP-TYPE

4.3.3.2 SRv6 PCE Capability Sub-TLV

4.3.3.3 SRv6-ERO Subobject

4.3.3.4 SRv6-RRO Subobject

4.4 SRv6 Policy

4.4.1 SRv6 Policy Model

4.4.1.1 Keys

4.4.1.2 Candidate Paths

4.4.1.3 Segment Lists

4.4.2 SRv6 Policy Path Computation

4.4.2.1 Manual Configuration

4.4.2.2 Headend Computation

4.4.2.3 Centralized Computation

4.4.3 Traffic Steering into an SRv6 Policy

4.4.3.1 Binding SID-Based Traffic Steering

4.4.3.2 Color-Based Traffic Steering

4.4.3.3 DSCP-Based Traffic Steering

4.4.4 Data Forwarding over an SRv6 Policy

4.4.5 SRv6 Policy Fault Detection

4.4.5.1 SBFD for SRv6 Policy

4.4.5.2 Headend-Based Fault Detection

4.4.6 SRv6 Policy Switchover

4.5 BGP SRv6 Policy

4.5.1 SRv6 Policy SAFI and NLRI

4.5.2 SR Policy and Tunnel Encaps Attribute

4.5.3 Binding SID Sub-TLV

4.5.4 Preference Sub-TLV

4.5.5 Segment List Sub-TLV

4.5.6 Weight Sub-TLV

4.5.7 Segment Sub-TLV

4.5.8 Policy Priority Sub-TLV

4.5.9 Policy Name Sub-TLV

4.6 Stories behind SRv6 Design

References

Chapter 5 ▪ SRv6 VPN

5.1 VPN Overview

5.1.1 Basic VPN Model

5.1.2 VPN Service Types

5.1.2.1 L3VPN

5.1.2.2 L2VPN and EVPN

5.2 SRv6 VPN Protocol Extensions

5.2.1 SRv6 Services TLV

5.2.2 SRv6 SID Information Sub-TLV

5.2.3 SRv6 SID Structure Sub-Sub-TLV

5.3 SRv6 L3VPN

5.3.1 Principles of L3VPN over SRv6 BE

5.3.1.1 Workflow of L3VPN over SRv6 BE in the Control Plane

5.3.1.2 Workflow of L3VPN over SRv6 BE in the Forwarding Plane

5.3.2 Principles of L3VPN over SRv6 TE

5.3.2.1 Workflow of L3VPN over SRv6 Policy in the Control Plane

5.3.2.2 Workflow of L3VPN over SRv6 Policy in the Forwarding Plane

5.4 SRv6 EVPN

5.4.1 Principles of EVPN E-LAN over SRv6

5.4.1.1 MAC Address Learning and Unicast Forwarding

5.4.1.2 Replication List Establishment and BUM Traffic Forwarding

5.4.2 Principles of EVPN E-Line over SRv6

5.4.3 Principles of EVPN L3VPN over SRv6

5.4.4 SRv6 EVPN Protocol Extensions

5.4.4.1 Ethernet A-D Route

5.4.4.2 MAC/IP Advertisement Route

5.4.4.3 IMET Route

5.4.4.4 ES Route

5.4.4.5 IP Prefix Route

5.5 Stories behind SRv6 Design

References

Chapter 6 ▪ SRv6 Reliability

6.1 IP FRR and E2E Protection

6.1.1 TI-LFA Protection

6.1.1.1 LFA

6.1.1.2 RLFA

6.1.1.3 TI-LFA

6.1.2 SRv6 Midpoint Protection

6.1.3 Egress Protection

6.1.3.1 Anycast FRR

6.1.3.2 Mirror Protection

6.2 Microloop Avoidance

6.2.1 Microloop Cause

6.2.2 SRv6 Local Microloop Avoidance in a Traffic Switchover Scenario

6.2.3 SRv6 Microloop Avoidance in a Traffic Switchback Scenario

6.2.4 SRv6 Remote Microloop Avoidance in a Traffic Switchover Scenario

6.3 Stories behind SRv6 Design

References

Chapter 7 ▪ SRv6 Network Evolution

7.1 Challenges Faced by SRv6 Network Evolution

7.1.1 Network Upgrade to Support IPv6

7.1.2 SRv6 Compatibility with Legacy Devices

7.1.3 Security Challenges Faced by SRv6

7.2 Incremental Deployment for SRv6 Networks

7.2.1 SRv6 Evolution Paths

7.2.2 SRv6 Deployment Process

7.2.3 SRv6 Evolution Practices

7.2.3.1 SRv6 Deployment Practice of China Telecom

7.2.3.2 SRv6 Deployment Practice of China Unicom

7.3 SRv6 Compatibility with Legacy Devices

7.3.1 Using Binding SIDs to Reduce the Depth of the SRv6 SID Stack

7.3.2 Applying FlowSpec to SRv6

7.4 SRv6 Network Security

7.4.1 IPv6 Security Measures

7.4.2 Security Measures for Source Routing

7.4.3 SRv6 Security Solution

7.5 Stories behind SRv6 Design

References

Chapter 8 ▪ SRv6 Network Deployment

8.1 SRv6 Solution

8.1.1 Single-AS Network

8.1.1.1 IP Backbone Network

8.1.1.2 Metro Network

8.1.1.3 Mobile Transport Network

8.1.1.4 Data Center Network

8.1.2 E2E Network

8.1.2.1 Inter-AS VPN

8.1.2.2 Carrier’s Carrier

8.2 IPv6 Address Planning

8.2.1 Principles for IPv6 Address Planning

8.2.2 IPv6 Address Allocation Methods

8.2.3 Hierarchical IPv6 Address Allocation

8.3 SRv6 Network Design

8.3.1 Basic SRv6 Configuration

8.3.2 IGP Design

8.3.3 BGP Design

8.3.4 SRv6 BE Design

8.3.4.1 Locator Route Advertisement

8.3.4.2 IS-IS Route Import and Aggregation

8.3.4.3 SRv6 BE TI-LFA Protection

8.3.5 SRv6 TE Design

8.3.5.1 SRv6 Policy

8.3.5.2 BGP-LS and BGP SRv6 Policy

8.3.5.3 SRv6 Policy Path Computation

8.3.5.4 SRv6 Policy Reliability

8.3.6 VPN Service Design

8.3.6.1 SRv6 EVPN L3VPN

8.3.6.2 SRv6 EVPN E-Line

8.3.6.3 EVPN SRv6 Policy

8.4 Evolution from MPLS to SRv6

8.5 Stories behind SRv6 Design

References

Part III SRv6 2.0

Chapter 9 ▪ SRv6 OAM and On-Path Network Telemetry

9.1 SRv6 OAM

9.1.1 OAM Overview

9.1.2 SRv6 FM

9.1.2.1 Classic IP Ping

9.1.2.2 SRv6 SID Ping

9.1.2.3 Classic Traceroute

9.1.2.4 SRv6 SID Traceroute

9.1.3 SRv6 PM

9.1.3.1 TWAMP Fundamentals

9.1.3.2 TWAMP-Based Active SRv6 PM

9.1.3.3 Coloring-Based Hybrid SRv6 PM

9.2 On-Path Network Telemetry

9.2.1 On-Path Network Telemetry Overview

9.2.2 On-Path Network Telemetry Modes

9.2.3 IFIT Architecture and Functions

9.2.3.1 Smart Traffic Selection

9.2.3.2 Efficient Data Sending

9.2.3.3 Dynamic Network Probe

9.2.4 IFIT Encapsulation Mode

9.2.5 IFIT for SRv6

9.2.5.1 Passport Mode

9.2.5.2 Postcard Mode

9.2.5.3 SRv6 IFIT Encapsulation

9.3 Stories behind SRv6 Design

References

Chapter 10 ▪ SRv6 for 5G

10.1 5G Network Evolution

10.2 SRv6 for Network Slicing

10.2.1 5G Network Slicing

10.2.2 Transport Network Slicing Architecture

10.2.3 SRv6-based Network Slicing

10.2.4 Network Slice Scalability

10.2.4.1 Control Plane Scalability of Network Slices

10.2.4.2 Data Plane Scalability of Network Slices

10.3 SRv6 for DetNet

10.3.1 5G uRLLC

10.3.1.1 Smart Grid

10.3.1.2 IoV

10.3.1.3 Cloud VR

10.3.2 DetNet Fundamentals

10.3.2.1 Redundancy Protection Fundamentals

10.3.2.2 Deterministic Latency Fundamentals

10.3.3 SRv6-based DetNet

10.3.3.1 SRv6-Based Redundancy Protection

10.3.3.2 SRv6-Based Deterministic Latency

10.4 SRv6 for 5G Mobile Networks

10.4.1 5G Mobile Network Architecture

10.4.2 SRv6 Deployment on a 5G Mobile Network

10.4.3 Key SRv6 Functions on a 5G Mobile Network

10.4.3.1 Args.Mob.Session

10.4.3.2 End.M.GTP6.D/End.M.GTP6.E

10.4.3.3 End.M.GTP4.E

10.4.3.4 End.Limit SID

10.4.4 Control Plane of a 5G Mobile Network

10.5 Stories behind SRv6 Design

References

Chapter 11 ▪ SRv6 for Cloud Services

11.1 SRv6 for Telco Cloud

11.1.1 Telco Cloud Overview

11.1.2 Telco Cloud Transport Network Architecture

11.1.3 Edge Telco Cloud Architecture

11.1.3.1 NAAF Physical Architecture

11.1.3.2 NAAF Transmission Protocols and Key Technologies

11.2 SRv6 for SFC

11.2.1 SFC Overview

11.2.1.1 Transport Network Gi-LAN

11.2.1.2 Multi-tenant Data Center

11.2.2 PBR/NSH-based SFC

11.2.3 SRv6-based SFC

11.2.3.1 Stateless SRv6 SFC

11.2.3.2 Stateful SRv6 SFC

11.3 SRv6 for SD-WAN

11.3.1 SD-WAN Overview

11.3.2 SRv6-based SD-WAN

11.3.2.1 Basic SRv6 SD-WAN Networking

11.3.2.2 Control Plane Processing Flow onthe SRv6 SD-WAN

11.3.2.3 SRv6 SD-WAN Data Forwarding Process

11.3.2.4 Advantages of the SRv6 SD-WAN Solution

11.4 Stories behind SRv6 Design

References

Chapter 12 ▪ SRv6 Multicast/BIERv6

12.1 Overview of Multicast Technologies and Services

12.1.1 PIM

12.1.2 MVPN

12.1.2.1 MVPN Routes

12.1.2.2 MVPN over an mLDP P2MP Tunnel

12.1.2.3 MVPN over an RSVP-TE P2MP Tunnel

12.1.2.4 Advantages of MVPN

12.1.2.5 Disadvantages of MVPN

12.1.3 BIER

12.1.3.1 BIER Working Group Anecdotes

12.2 BIER Multicast Technology

12.2.1 Basic Concepts of BIER

12.2.2 BIER Architecture

12.2.2.1 Routing Underlay

12.2.2.2 BIER Layer

12.2.2.3 Multicast Flow Overlay

12.2.3 BIER Forwarding Fundamentals

12.2.3.1 BFR-ID Configuration

12.2.3.2 BIFT Introduction

12.2.3.3 BIFT Establishment

12.2.3.4 BIFT Lookup and Packet Forwarding

12.2.4 BIER Data Plane

12.2.5 BIER Control Plane

12.2.6 MVPN over BIER

12.2.7 Characteristics of BIER

12.3 BIERv6 Multicast Technology

12.3.1 Proposal and Design of BIERv6

12.3.2 BIERv6 Fundamentals

12.3.3 BIERv6 Control Plane

12.3.4 MVPN over BIERv6

12.3.5 GTM over BIERv6

12.3.6 Inter-AS Multicast over BIERv6

12.3.7 Characteristics of BIERv6

12.4 Other SRv6 Multicast Technologies

12.4.1 P2MP Multicast Forwarding Path Establishment Using the Tree SID Solution

12.4.2 Multicast Packet Forwarding Using the Tree SID Solution

12.4.3 Characteristics of the Tree SID Solution

12.5 Stories behind SRv6 Design

References

Part IV Summary and Future Developments

Chapter 13 ▪ SRv6 Industry and Future

13.1 SRv6 Industry Progress

13.1.1 SRv6 Standardization Progress

13.1.2 SRv6-Related Products

13.1.3 SRv6 Interoperability Test

13.1.3.1 SRv6 Interoperability Test by the EANTC

13.1.3.2 SRv6 Interoperability Test by China’s Expert Committee of Promoting Large-Scale IPv6 Deployment

13.1.4 Commercial SRv6 Deployment

13.1.5 SRv6 Industrial Activities

13.2 SRv6 Extension Header Compression

13.2.1 Impact of the SRv6 Extension Header Length

13.2.2 SRv6 Extension Header Compression Solutions

13.2.2.1 G-SRv6

13.2.2.2 uSID

13.2.2.3 SRm6

13.2.3 Comparison between SRv6 Extension Header Compression Solutions

13.2.4 Future of SRv6 Extension Header Compression

13.3 APN6

13.3.1 Why APN6

13.3.1.1 Current Carriers’ Pain Points and Requirements

13.3.1.2 Challenges Faced by Traditional Differentiated Service Solutions

13.3.1.3 APN6 Solution

13.3.2 APN6 Framework

13.3.3 APN6 Framework Requirements

13.3.3.1 Requirements for Carrying Application Characteristic Information

13.3.3.2 Requirements for Processing Application-Aware Information

13.3.3.3 Security Requirements

13.3.4 Future of APN6

13.4 From SRv6 to IPv6+

13.5 Stories behind SRv6 Design

13.5.1 Design of SRv6 Compression: From C-SRH to G-SRH

13.5.2 Design Principle: Internet and Limited Domains

13.5.3 Design Principle: The Greatest Truths Are the Simplest

References

Postface: SRv6 Path

Appendix A: IPv6 Basics

Appendix B: IS-IS TLVs

Appendix C: OSPFv3 TLVs

Appendix D: Acronyms and Abbreviations

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