Description: This object describes a set of filter or classifier criteria. Classifiers are assigned by group to the individual CMs. That assignment is made via the 'Subscriber Management TLVs' encodings sent upstream from the CM to the CMTS during registration or in their absence, default values configured in the CMTS. A Filter Group ID (GrpId) is a set of rules that correspond to the expansion of a UDC Group ID into UDC individual classification rules. The Filter Group Ids are generated whenever the CMTS is configured to send UDCs during the CM registration process. Implementation of L2 classification criteria is optional for the CMTS; LLC/MAC upstream and downstream filter criteria can be ignored during the packet matching process.