16 Citrix NetScaler Policy Configuration and Reference Guide
Note: At the command line, quote marks within a policy rule (the expression)
must be escaped or delimited with the q delimiter. For more information, see
“Configuring Advanced Expressions in a Policy,” on page 57.
Binding Advanced Policies After defining a policy, you indicate when the policy is to be invoked by binding
the policy to a bind point and specifying a priority level. You can bind a policy to
only one bind point. A bind point can be global, that is, it can apply to all virtual
servers that you have configured. Or, a bind point can be specific to a particular
virtual server, which can be either a load balancing or a content switching virtual
server. Not all bind points are available for all features.
The order in which policies are evaluated determines the order in which they are
applied, and features typically evaluate the various policy banks in a particular
order. Sometimes, however, other features can affect the order of evaluation.
Within a policy bank, the order of evaluation depends on the values of parameters
configured in the policies. Most features apply all of the actions associated with
policies whose evaluation results in a match with the data that is being processed.
The integrated caching feature is an exception.
Feature-Specific Differences in Policy Bindings
You can bind policies to built-in, global bind points (or banks), to vi rtual servers,
or to policy labels.
However, the NetScaler features differ in terms of the types of bindings that are
available. The following table summarizes how you use policy bindings in
various NetScaler features that use advanced policies.
Feature-Specific Bindings for Advanced Policies
Feature Name Virtual Servers
Configured in the
Feature
Policies
Configured in the
Feature
Bind Points
Configured for the
Policies
Use of Advanced Policies in
the Feature
DNS none DNS policies Global To determine how to
perform DNS resolution for
requests.