The CBQ Class object controlling whether the class will generate
an event message when filtering a packet. Note that a filter
class (a class that is filtering all packets which match it) is
a class with no bandwidth allocated to it (xtmClassRate == 0) and
is also bounded and cannot borrow (xtmClassBounded == true).
Also note that filter classes do not queue packets; therefore
modifying the xtmClassQueueElasticityFactor has no effect on this
class.
It is also important to understand that setting this object to
a value of true has performance implications for the system.
During the time it takes to generate the event message, the CPU
cannot be utilized to forward packets. As the system must generate
an event message for each packet that matches the class and is
subsequently dropped, the operator should be cautious and use
this feature where truly needed.