> #### Characteristics of and benefits associated with rule sets

> Rule sets allow you to do the following:

> - Associate the rule set with a monitoring plan. The polled rules in the sets are evaluated when the monitoring plan is active and the resource is polled. (Asynchronous rules trigger immediately when these rules are violated.)
> - Use an updated rule set. If you associate a rule set with a monitoring plan and you later update the rule set, the updated rule set is then used by the monitoring plan.
> - Share the same rule set among several resource instances, such as all NameServers using the same common rule sets.
> - Associate zero, one, or more rule sets with a broker monitoring plan.
> - Override one or more rules defined in any rule set used by a monitoring plan.

> The following procedure describes how to create a rule set, using the creation of a NameServer rule set as an example.

> To create a NameServer rule set:

> 1. From the management console menu bar, click Library. The Fathom Component Library page appears:

> 2. Click Create NameServer Rule Set. The Create NameServer Rule Set page appears:

> 3. In the Name field, enter the name of the rule set (no spaces allowed).
> 4. In the Description field, enter a brief description of the rule set.
> 5. Click Save. The NameServer Rule Set page appears:

> Note the following about rule sets:

> - The rule set is now listed under the Fathom Component Library list frame under Rule Sets NameServer, in this instance. (Rules sets associated with WebSpeed rules and AppServer rules are listed in the same Rule Sets category, but under the specific WebSpeed and AppServer rule set-related subcategory.)
> - Once you create a rule set, you can edit, copy, or delete it.
> - If you add a rule or a rule set to an existing rule set, the change affects all resources using the rule set.

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