IPv6 for Enterprise Networks

IPv6 for Enterprise Networks

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IPv6 for Enterprise Networks

The practical guide to deploying IPv6 in campus,
WAN/branch, data center, and virtualized environments

Shannon McFarland, CCIE (R) No. 5245

Muninder Sambi, CCIE No. 13915

Nikhil Sharma, CCIE No. 21273

Sanjay Hooda, CCIE No. 11737

IPv6 for Enterprise Networks brings together all the information you need to successfully deploy IPv6 in any campus, WAN/branch, data center, or virtualized environment. Four leading Cisco IPv6 experts present a practical approach to organizing and executing your large-scale IPv6 implementation. They show how IPv6 affects existing network designs, describe common IPv4/IPv6 coexistence mechanisms, guide you in planning, and present validated configuration examples for building labs, pilots, and production networks.

The authors first review some of the drivers behind the acceleration of IPv6 deployment in the enterprise. Next, they introduce powerful new IPv6 services for routing, QoS, multicast, and management, comparing them with familiar IPv4 features and behavior. Finally, they translate IPv6 concepts into usable configurations. Up-to-date and practical, IPv6 for Enterprise Networks is an indispensable resource for every network engineer, architect, manager, and consultant who must evaluate, plan, migrate to, or manage IPv6 networks.

Shannon McFarland, CCIE No. 5245, is a Corporate Consulting Engineer for Cisco serving as a technical consultant for enterprise IPv6 deployment and data center design with a focus on application deployment and virtual desktop infrastructure. For more than 16 years, he has worked on large-scale enterprise campus, WAN/branch, and data center network design and optimization. For more than a decade, he has spoken at IPv6 events worldwide, including Cisco Live.

Muninder Sambi, CCIE No. 13915, is a Product Line Manager for Cisco Catalyst 4500/4900 series platform, is a core member of the Cisco IPv6 development council, and a key participant in IETF's IPv6 areas of focus.

Nikhil Sharma, CCIE No. 21273, is a Technical Marketing Engineer at Cisco Systems where he is responsible for defining new features for both hardware and software for the Catalyst 4500 product line.

Sanjay Hooda, CCIE No. 11737, a Technical Leader at Cisco, works with embedded systems, and helps to define new product architectures. His current areas of focus include high availability and messaging in large-scale distributed switching systems.

n Identify how IPv6 affects enterprises

n Understand IPv6 services and the IPv6 features that make them possible

n Review the most common tranisition mechanisms including dual-stack (IPv4/IPv6) networks, IPv6 over IPv4 tunnels, and IPv6 over MPLS

n Create IPv6 network designs that reflect proven principles of modularity, hierarchy, and resiliency

n Select the best implementation options for your organization

n Build IPv6 lab environments

n Configure IPv6 step-by-step in campus, WAN/branch, and data center networks

n Integrate production-quality IPv6 services into IPv4 networks

n Implement virtualized IPv6 networks

n Deploy IPv6 for remote access

n Manage IPv6 networks efficiently and cost-effectively

This book is part of the Networking Technology Series from Cisco Press (R), which offers networking professionals valuable information for constructing efficient networks, understanding new technologies, and building successful careers.
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Product details

  • Hardback | 400 pages
  • 185.42 x 233.68 x 27.94mm | 816.46g
  • Cisco Press
  • Indianapolis, United States
  • English
  • 1587142279
  • 9781587142277
  • 873,141

Table of contents

Introduction xix

Chapter 1 Market Drivers for IPv6 Adoption 1

IPv4 Address Exhaustion and the Workaround Options 2

IPv6 Market Drivers 3

IPv4 Address Considerations 4

Government IT Strategy 5

Infrastructure Evolution 5

Operating System Support 6

Summary of Benefits of IPv6 6

Commonly Asked Questions About IPv6 6

Does My Enterprise Need IPv6 for Business Growth? 6

Will IPv6 Completely Replace IPv4? 9

Is IPv6 More Complicated and Difficult to Manage and Deploy Compared

to IPv4? 9

Does IPv6 continue to allow my enterprise network to be multihomed to

several service providers? 10

Is quality of service better with IPv6? 10

Is IPv6 automatically more secure than IPv4? 10

Does the lack of NAT support in IPv6 reduce security? 10

IPv6 in the IETF 11

Enterprise IPv6 Deployment Status 12

Summary 15

Additional References 15

Chapter 2 Hierarchical Network Design 17

Network Design Principles 18

Modularity 19

Hierarchy 21

Resiliency 24

Enterprise Core Network Design 24

Enterprise Campus Network Design 25

Distribution Layer 25

Layer 2 Access Design 25

Routed Access Design 27

Virtual Switching System Distribution Block 28

Comparing Distribution Block Designs 28

Access Layer 29

Enterprise Network Services Design 29

Enterprise Data Center Network Design 31

Aggregation Layer 31

Access Layer 32

Data Center Storage Network Design 33

Collapsed Core Topology 35

Core Edge Topology 35

Enterprise Edge Network Design 37

Headquarters Enterprise Edge Network Components 38

Headquarters Enterprise Edge Network Design 39

Branch Network Architecture 39

Branch Edge Router Functionality 41

Typical Branch Network Design 42

Summary 43

Additional References 43

Chapter 3 Common IPv6 Coexistence Mechanisms 45

Native IPv6 47

Transition Mechanisms 48

Dual-Stack 48

IPv6-over-IPv4 Tunnels 49

Manually Configured Tunnel 51

IPv6-over-IPv4 GRE Tunnel 53

Tunnel Broker 54

6to4 Tunnel 55

Intra-Site Automatic Tunnel Addressing Protocol (ISATAP) 57

IPv6 over MPLS 58

IPv6 over Circuit Transport over MPLS 58

IPv6 Using IPv4 Tunnels on Customer Edge (CE) Routers 60

IPv6 MPLS with IPv4-Based Core (6PE/6VPE) 60

Protocol Translation/Proxy Mechanisms 62


NAT64 64

Summary 64

Additional References 65

Chapter 4 Network Services 67

Multicast 67

IPv6 Multicast Addressing 69

Multicast Listener Discovery (MLD) for IPv6 71

Multicast Routing: Protocol Independent Multicast (PIM) 72

PIM Sparse Mode (PIM-SM) 73

PIM Source Specific Multicast (PIM-SSM) 74

Bidirectional PIM (PIM-Bidir) 76

Quality of Service (QoS) 76

Differences Between IPv6 and IPv4 QoS 76

IPv6 Extension Headers 78

IPv4 and IPv6 Coexistence 79

IPv6 Routing 80

OSPFv3 80

EIGRPv6 83

IS-IS 85

Single Topology 86

Multitopology 86

Configuring IS-ISv6 86

BGP 87

Multiprotocol BGP for IPv6 88

Summary 89

Additional References 89

Chapter 5 Planning an IPv6 Deployment 91

Determining Where to Begin 91

Benefit Analysis 92

Cost Analysis 93

Risks 94

Business Case 94

Transition Team 95

Training 96

Planning a Pilot 96

Assessment 96

Design 97

IPv6 Addressing Plan 97

Transition Mechanisms 98

Network Services 98

Security 98

New Features in IPv6 99

Scalability and Reliability 99

Service Level Agreements 99

Lessons Learned and Implementation 99

Client/Server IPv6 Migration Scenarios 100

IPv6 Core Deployment: "Start at the Core" 101

Localized IPv6 Server-Side Deployment 102

Client-Side Deployment 102

Client/Server Deployment: Dual-Stack Configuration 103

Planning Address Allocation 104

Summary 104

Additional References 105

Chapter 6 Deploying IPv6 in Campus Networks 107

Campus Deployment Models Overview 107

Dual-Stack Model 108

Benefits and Drawbacks of the DSM 108

DSM Topology 109

DSM-Tested Components 109

Hybrid Model 109

Benefits and Drawbacks of the HM 114

HM Topology 115

HM-Tested Components 115

Service Block Model 115

Benefits and Drawbacks of the SBM 116

SBM Topology 117

SBM-Tested Components 119

General Campus IPv6 Deployment Considerations 119

Addressing 119

Physical Connectivity 120

VLANs 121

Routing 121

High Availability 122

QoS 123

Security 125

Making Reconnaissance More Difficult Through Complex Address

Assignment 126

Controlling Management Access to the Campus Switches 126

IPv6 Traffic Policing 128

Using Control Plane Policing (CoPP) 129

Controlling Ingress Traffic from the Access Layer 130

First-Hop Security 130

Blocking the Use of Microsoft Teredo 131

Multicast 131

Network Management 132

Address Management 132

Scalability and Performance 135

Scalability and Performance Considerations for the DSM 135

Scalability and Performance Considerations for the HM 136

Scalability and Performance Considerations for the SBM 137

Implementing the Dual-Stack Model 137

Network Topology 138

Physical/VLAN Configuration 140

Routing Configuration 143

First-Hop Redundancy Configuration 145

QoS Configuration 147

Multicast Configuration 149

Routed Access Configuration 151

Cisco Virtual Switching System with IPv6 155

VSS Configuration 157

VSS Physical Interface IPv6 Configuration 160

Implementing the Hybrid Model 161

Network Topology 161

Physical Configuration 162

Tunnel Configuration 163

QoS Configuration 171

Infrastructure Security Configuration 173

Implementing the Service Block Model 174

Network Topology 174

Physical Configuration 176

Tunnel Configuration 178

QoS Configuration 180

Summary 181

Additional References 182

Chapter 7 Deploying Virtualized IPv6 Networks 185

Virtualization Overview 186

Virtualization Benefits 186

Virtualization Categories 186

Network Virtualization 188

Switch Virtualization 188

Network Segmentation 188

Virtual Routing and Forwarding (VRF-Lite) 189

Transporting IPv6 Across the MPLS Backbone 193

Virtual Private LAN Services 211

Network Services Virtualization 212

Virtualized Firewall 213

Cisco Adaptive Security Appliance (ASA)

Virtualization Architecture 213

Understanding Virtual Contexts on the Cisco ASA 214

Configuring Multiple Contexts on the Cisco ASA 215

Configuring IPv6 Access Lists 219

Desktop Virtualization 220

IPv6 and Desktop Virtualization 221

Desktop Virtualization Example: Oracle Sun Ray 222

Server Virtualization 223

Summary 223

Additional References 224

Chapter 8 Deploying IPv6 in WAN/Branch Networks 225

WAN/Branch Deployment Overview 226

Single-Tier Profile 226

Dual-Tier Profile 227

Redundancy 228

Scalability 228

WAN Transport 228

Multitier Profile 228

General WAN/Branch IPv6 Deployment Considerations 229

Addressing 230

Physical Connectivity 230

VLANs 231

Routing 232

High Availability 232

QoS 233

Security 233

Multicast 236

Management 236

Scalability and Performance 238

WAN/Branch Implementation Example 238

Tested Components 239

Network Topology 240

WAN Connectivity 240

Branch LAN Connectivity 241

Firewall Connectivity 241

Head-End Configuration 242

Branch WAN Access Router Configuration 245

Branch Firewall Configuration 247

EtherSwitch Module Configuration 250

Branch LAN Router Configuration 252

WAN/Branch Deployment over Native IPv6 254

Summary 258

Additional References 258

Chapter 9 Deploying IPv6 in the Data Center 261

Designing and Implementing a Dual-Stack Data Center 262

Data Center Access Layer 264

Configuring Access Layer Devices for IPv6 265

NIC-Teaming Considerations 267

Data Center Aggregation Layer 269

Bypassing IPv4-Only Services at the Aggregation Layer 269

Deploying an IPv6-Only Server Farm 271

Supporting IPv4-Only Servers in a Dual-Stack Network 271

Deploying IPv6-Enabled Services at the Aggregation Layer 272

Data Center Core Layer 279

Implementing IPv6 in a Virtualized Data Center 279

Implementing IPv6 for the SAN 281

FCIP 281

iSCSI 284

Cisco MDS Management 285

Designing IPv6 Data Center Interconnect 286

Design Considerations: Dark Fibre, MPLS, and IP 287

DCI Services and Solutions 288

Summary 289

Additional References 289

Chapter 10 Deploying IPv6 for Remote Access VPN 291

Remote Access for IPv6 Using Cisco AnyConnect 292

Remote Access for IPv6 Using Cisco VPN Client 297

Summary 301

Additional References 301

Chapter 11 Managing IPv6 Networks 303

Network Management Framework: FCAPS 304

Fault Management 305

Configuration Management 305

Accounting Management 306

Performance Management 306

Security Management 306

IPv6 Network Management Applications 307

IPv6 Network Instrumentation 308

Network Device Management Using SNMP MIBs 308

Relevance of IPv6 MIBs 311

IPv6 Application Visibility and Monitoring 312

Flexible NetFlow 312

NetFlow Versions 313

NetFlow version 9 (Flexible NetFlow [FnF]) 314


IP SLA for IPv6 322

Automation Using Flexible Programming with

Embedded Event Manager 328

IPv6 Network Management 330

Monitoring and Reporting 331

SNMP over IPv6 331

Syslog over IPv6 332

ICMPv6 332

Network Services 333

TFTP 333

NTP 333

Access Control and Operations 334

Telnet 334

SSH 335

HTTP 336

IPv6 Traffic-Monitoring Tools 337


Configuring SPAN Types 338

Mini Protocol Analyzer 339

VLAN Access Control List (VACL) Capture 340

Summary 341

Additional References 342

Chapter 12 Walk Before Running: Building an IPv6 Lab and Starting a Pilot 343

Sample Lab Topology 344

Sample Lab Addressing 347

Configuring the Networking Devices 348

Operating System, Application, and Management Deployment 348

Moving to a Pilot 359

Summary 360

Additional References 360

Index 361
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About Shannon McFarland

Shannon McFarland

, CCIE No. 5245, is a corporate consulting engineer for Cisco, working as a technical

consultant for enterprise IPv6 deployment and data center design with a focus on application deployment

and virtual desktop infrastructure. Over the last 16 years, he has worked on large-scale enterprise campus

and WAN/branch network design, data center design and optimization for Microsoft operating systems

and server applications, as well as design and optimization of virtual desktop infrastructure deployments.

For the past 10 years, Shannon has been a frequent speaker at IPv6 events worldwide (notably Cisco Live

[formerly Networkers]), IPv6 summits, and other industry events. He has authored many papers and Cisco

Validated Designs (CVD) on IPv6, IP Multicast, Microsoft Exchange, VMware View, and other applications,

as well as contributed to many Cisco Press books. Prior to his time at Cisco, Shannon worked as a

consultant for a value-added reseller and also as a network engineer in the healthcare industry. Shannon

lives with his wife and children in Castle Rock, CO.

Muninder Sambi, CCIE No. 13915, is a manager of product marketing for the Cisco Catalyst 4500/4900

series platform. As a product line manager, he is responsible for defining product strategies on the multibillion-

dollar Catalyst 4500 and 4900 series platforms, which include next-generation product architectures

both for user access in Campus and Server access in the Data Center. Prior to this role, Muninder

played a key role in defining the long-term Software and Services strategy for Cisco's modular switching

platforms (Catalyst 6500 and 4500/4900 series) including a focus on IPv6 innovations. Some of these

innovations enabled dual-stack IPv6 deployments in large enterprise and service provider networks.

Muninder is also a core member of Cisco's IPv6 development council. Muninder has represented Cisco as

part of multiple network design architecture reviews with large enterprise customers. Over the last 12+

years, Muninder has worked on multiple Enterprise Campus, WAN, and Data Center designs. Prior to

working at Cisco, Muninder worked as a network consultant for one of India's leading network integrators

and was responsible for designing and implementing LAN, WAN, and hosted Data Center networks.

Muninder lives with his wife and children in Fremont, California.

Nikhil Sharma, CCIE No. 21273, is a technical marketing engineer at Cisco, where he is responsible for

defining new features, both hardware and software, for the Catalyst 4500 product line. Over the last 10

years, Nikhil has worked with various enterprise customers to design and troubleshoot both large and

midsize campus and data center networks.

Sanjay Hooda, CCIE No. 11737, is a technical leader at Cisco, where he works with embedded systems

and helps define new product architectures. His current focus areas include high availability and messaging

in large-scale distributed switching systems. Over the last 14 years, Sanjay's experience spans various

areas, including SCADA (Supervisor Control and Data Acquisition), large-scale software projects, and

enterprise campus and LAN, WAN, and data center network design.
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