When neighbor filtering is enabled (that is, when pimInterfaceUseNeighborFilter is 'true'), the local router will process link-local multicast PIM messages received on this interface only if the originator's IP address (that is, the source address in the IP header) is included in the standard access list corresponding to the list index value configured for this object. Note that this filter does not apply to unicast PIM messages, even if the originator is directly connected to the local router. So, for example, this filter has no effect on the processing of received Register messages. In other words, the standard access list is a whitelist, and the local router will treat any router excluded from the list as not being a valid PIM neighbor. To filter out all PIM neighbors, either configure this object to be the list index of an 'exclude all' standard access list, or use the pimInterfaceStubInterface object. This field is ignored if pimTmEntMgmdProxy is set to 'true'.