When PIM-SM ASM / BIDIR-PIM group filtering is enabled (that is, when pimInterfaceUseAsmGrpFilter is 'true'), then for groups in the PIM-SM ASM and BIDIR-PIM spaces the local router will: - process PIM (*,G) Join messages received on this interface only if the group address is included in the standard access list corresponding to the list index value configured for this object. For PIM-SM ASM groups, this applies to (S,G) Join messages too. - only send PIM (*,G) Join messages over this interface if the group address is included in the standard access list corresponding to the list index value configured for this object. For PIM-SM ASM groups, this applies to (S,G) Join messages too. Local membership requests from the MGMD Router component are not filtered. These should be filtered by the MGMD Router component. In other words, the standard access list is a whitelist of the PIM-SM ASM and BIDIR-PIM groups for which DC-PIM is permitted to request or receive traffic over the interface. pimInterfaceAsmGrpFilter defaults to 0, which indicates that no access list is specified. If the index does not correspond to a valid access list, no group addresses will match the list and therefore all PIM (*,G) Join and PIM (S,G) Join messages will be filtered. This field is only relevant for PIM-SM and BIDIR-PIM. It is ignored if 'sparse' and 'bidir' are both clear for pimTmEntMode.