A listener policy is a set of commands that specifies the actions to be performed on packets as they leave the 9920 device. Each listener policy can exist as multiple instances, which are differentiated by a user-specified, unique sequence ID. Listener policies are associated with other settings that are also specified as policies.
The NPB application supports multiple listener policies, each uniquely identified by a listener policy name. Each listener policy can have multiple stanzas, which are uniquely identified by the sequence ID. A listener policy applies an ACL to an egress and the interfaces associated with it, and defines the actions for the matching ACL. When a listener policy is bound to the egress, it applies the listener policy actions to packet flow.