Policy Framework Configuration Guide - Juniper Networks

Chapter 2: Introduction to Routing Policy
Figure 10: Routing Policy Subroutine Evaluation
Routing Policy Tests
After you have created a routing policy, you can use the test policy command to ensure
that the policy produces the results that you expect before applying the policy in a live
environment. This command determines whether the routes specified in your routing
policy are accepted or rejected. The default action of the test policy command is accept.
NOTE: The default policy of the test policy command accepts all routes from
all protocols. Test output can be misleading when you are evaluating
protocol-specific conditions.
For example, if you define a policy for BGP that accepts routes of a specified
prefix and apply it to BGP as an export policy, BGP routes that match the
prefix are advertised to BGP peers. However, if you test the same policy using
the test policy command, the test output might indicate that non-BGP routes
have been accepted.
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