When SSM source and group filtering is enabled (that is, when pimTmEntUseSsmSrcAndGrpFilter is 'true'), then for groups in the SSM space, the local router will: - process received PIM (S,G) Join messages only if the {source, group} pair is included in the extended access list corresponding to the list index value configured for this object, and - accept (S,G) local membership requests from the MGMD Router component only if the {source, group} pair is included in the extended access list corresponding to the list index value configured for this object. In other words, the extended access list is a whitelist of the SSM {source, group} pairs for which DC-PIM is permitted to request traffic. pimTmEntSsmSrcAndGrpFilter defaults to 0, which indicates that no access list is specified. When pimTmEntUseSsmSrcAndGrpFilter is set to to 'true', then pimTmEntRowStatus can only become 'active' if a non-zero value has been specified for pimTmEntSsmSrcAndGrpFilter. This field is only relevant for PIM-SM. This field is ignored if 'sparse' is clear for pimTmEntMode.