The default action of a policy applies to a route when the route does not match any of the entries of the policy. If a policy does not have any match entries, all routes are subject to the default action. If no default action is specified and the policy is the last one in a chain of policies, the default action is determined by the protocol that called the policy.
If a default action is defined for one or more of the configured route policies, then the default action is handled as follows.
The default action can be set to all available action states including accept, reject, next-entry, and next-policy.
If the action states accept or reject, then the policy evaluation terminates and the appropriate result is returned.
If a default action is defined and no matches occurred with the entries in the policy, then the default action is used.
If a default action is defined and one or more matches occurred with the entries of the policy, then the default action is not used.