TAILIEUCHUNG - Data Center—Site Selection for Business Continuance

For small, medium, and large businesses, it is critical to provide high availability of data for both customers and employees. The objective behind disaster recovery and business continuance plans is accessibility to data anywhere and at any time. Meeting these objectives is all but impossible with a single data center. The single data center is a single point of failure if a catastrophic event occurs. The business comes to a standstill until the data center is rebuilt and the applications and data are restored | Data Center Site Selection for Business Continuance Preface 5 Intended Audience 6 Chapter 1 Site Selection Overview 6 The Need for Site Selection 6 Business Goals and Requirements 7 The Problem 7 The Solution 7 Single Site Architecture 8 Multi-Site Architecture 8 Application Overview 8 Legacy Applications 8 Non-Legacy Applications 9 Application Requirements 9 Benefits of Distributed Data Centers 10 Site-to-Site Recovery 10 Multi-Site Load Distribution 10 Solution Topologies 11 Site-to-Site Recovery 11 User to Application Recovery 14 Database-to-Database Recovery 14 Storage-to-Storage Recovery 14 Multi-Site Topology 15 Conclusion 17 Chapter 2 Site Selection Technologies 17 Site Selection 17 Americas Headquarters Cisco Systems Inc. 170 West Tasman Drive San Jose CA 95134-1706 USA year Cisco Systems Inc. All rights reserved. DNS-Based Site Selection 18 HTTP Redirection 19 Route Health Injection 20 Supporting Platforms 21 Global Site Selector 21 WebNS and Global Server Load Balancing 22 Application Control Engine ACE for Catalyst 6500 23 Conclusion 24 Chapter 3 Site-to-Site Recovery Using DNS 25 Overview 25 Benefits 25 Hardware and Software Requirements 25 Design Details 26 Design Goals 26 Redundancy 26 High Availability 26 Scalability 26 Security 27 Other Requirements 27 Design Topologies 27 Site-to-Site Recovery 27 Implementation Details 28 Primary Standby 29 Redundancy 29 High Availability 31 Scalability 31 Basic Configuration 31 Site-to-Site Recovery 33 Site Selection Method 33 Configuration 33 Conclusion 35 Chapter 4 Multi-Site Load Distribution Using DNS 35 Overview 35 Benefits 35 Hardware and Software Requirements 36 Design Details 36 Design Goals 36 Redundancy 36 High Availability 36 Scalability 37 2 OL-14895-01 I Security 37 Other Requirements 37 Design Topologies 37 Multi-Site Load Distribution 38 Site 1 Site 2 Site 3 38 Implementation Details 39 Redundancy 40 High Availability 41 Scalability 42 Basic Configuration 42 Multi-Site Load Distribution 43 Site .

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