Controls and reflects the status of rows in this
table. Specifying only this object (with the appropriate
index) on a CM is sufficient to create a filter row which
matches all inbound packets on the ethernet interface,
and results in the packets being
discarded. docsDevFilterIpIfIndex (at least) must be
specified on a CMTS to create a row. Creation of the
rows may be done via either create-and-wait or
create-and-go, but the filter is not applied until this
object is set to (or changes to) active. There is no
restriction in changing any object in a row while this
object is set to active.