An entry contains details about an active system filter policy. Only one active system filter policy per filter type can be configured in release 0.0. Upon creation of the entry the system filter policy identified by the values of the objects tFilterSystemFilterType and tFilterSystemFilterId is activated and downloaded to all line cards. Regular IP or IPv6 filter policies that have the value of the object tIPFilterChainToSystemFilter or tIPv6FilterChainToSystemFilter set to 'true(1)' are then chained to the active system filter policy. The system filter policy's rules are executed first before any rules of the regular filter policy are executed. An entry in the table tFilterSystemFilterTable is created and destroyed by SNMP SET operations on the object tFilterSystemFilterRowStatus. Furthermore an entry in the table tFilterSystemFilterTable is destroyed by the system if an entry with the same value of the object tFilterSystemFilterType is created so that there is always at most one entry for a given value of tFilterSystemFilterType.