Specifies whether an acknowledgment is sent by an NMS to indicate that an illegal source address trap was received. acked : Set by a NMS to acknowledge reception of an illegal source address. When this flag is set, no more trap will be sent for the port. no-acked-sending: Set by the SNMP agent to indicate that it is sending a trap to one or more NMSs. The trap is sent based upon the trap algorithm specified by ciscoRptrTrapAlgorithm. no-acked-no-sending: Set by the SNMP agent when there is no trap to be sent or the trap was already sent out.