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Chapter 1
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◆ 3-DNS Reference Guide
The 3-DNS Reference Guide provides basic descriptions of individual
3-DNS objects, such as wide IPs, pools, virtual servers, load balancing
modes, the big3d agent, resource records, and production rules. It also
provides syntax information for 3dnsmaint commands, configuration
utilities, the wideip.conf file, and system utilities.
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Stylistic conventions
To help you easily identify and understand certain types of information, this
documentation uses the following stylistic conventions.
All examples in this documentation use only non-routable IP addresses.
When you set up the solutions we describe, you must use IP addresses
suitable to your own network in place of our sample IP addresses.
Identifying new terms
When we first define a new term, the term is shown in bold italic text. For
example, a wide IP is a mapping of a fully-qualified domain name to a set of
virtual servers that host the domain’s content.
Identifying references to products
We refer to all products in the BIG-IP product family as the BIG-IP system.
We refer to the 3-DNS Controller and the 3-DNS module as the 3-DNS
Controller. If specific configuration information relates to a specific
platform, we note the platform.
Identifying references to objects, names, and commands
We apply bold text to a variety of items to help you easily pick them out of a
block of text. These items include web addresses, IP addresses, utility
names, and portions of commands, such as variables and keywords. For
example, the nslookup command requires that you include at least one
<ip_address> variable.
Identifying references to other documents
We use italic text to denote a reference to another document. In references
where we provide the name of a book as well as a specific chapter or section
in the book, we show the book name in bold, italic text, and the
chapter/section name in italic text to help quickly differentiate the two. For
example, you can find information about topology in the 3-DNS Reference
Guide, Chapter 3, Topology.