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Document Overview
This document is a Double-Take
®
application note. An application note provides guidelines on the use
of Double-Take in a specific environment.
This document contains:
Document Overview—Explains what an application note contains, how it should be used, what
you need to know before trying to use the application note, and where you can go for more
information.
Solution Overview—Explains how the application works with Double-Take and describes the
considerations that you must weigh when implementing your Double-Take solution. Review this
section to make sure that you understand the theory involved with using Double-Take and your
application. Includes both basics, such as system requirements, as well as configuration and
environment-specific topics, such as interactions with specific clients or special considerations for
WAN (Wide Area Network) environments. Pay special attention to those topics that are directly
related to your environment.
Sample Implementations—Describes specific examples of how to use Double-Take for this
solution. This includes information about the specific system setup used in the sample
implementation. Use these procedures as a guideline for creating your own implementation.
Because no two environments or configurations are exactly the same, you will probably need to
implement additional or different steps than what is documented here in order to make the
solution work in your environment.
Expectations
Application notes are intended to provide a framework for configuring a Double-Take solution in a
specific environment and to draw attention to decisions you will need to make when configuring your
solution.
Because there are an infinite number of possible configuration, network, and environment scenarios,
application notes contain general configuration guidelines as well as an example configuration
procedure that has been tested for a specific environment.
This document assumes that you are comfortable working with your operating system, Double-Take,
OpenVPN, and Amazon EC2 cloud.
Related documentation
Before you begin to configure your solution, make sure that you have complete documentation for
your operating system, application, and Double-Take. This application note does not provide
step-by-step instructions for using standard operating system, application, and Double-Take
functionality.
The following documents contain additional information that you may need while setting up this
solution:
Double-Take User’s Guide or online documentation
Reference guides or documentation for Amazon EC2 cloud
Getting help
Double-Take Software has application notes that describe how to configure Double-Take with a
variety of popular third-party applications. These application notes are available on the Application
Notes page of the Double-Take Software support web site (http://support.doubletake.com
).
For help using Double-Take, refer to the Double-Take online manual or online help.
Double-Take Software offers professional services on a fee basis to assist you in identifying the best
practices for implementing a solution in your environment. Visit
http://www.doubletake.com/english/services/
for more information.
NOTE: Double-Take Software does not provide technical support for configuration of the Amazon
cloud or the open source VPN solution (OpenVPN).
Amazon offers premium support for cloud configurations. More information is available at
http://aws.amazon.com/premiumsupport/
.