Receiving a FLOOD Message

Section specifies the rules for handling received FLOOD messages. In addition to those rules, when sending an ACK message in response to a FLOOD message with a nonzero Validate PNRP ID field, a Publisher MUST check its Locally Registered PNRP ID List. If the Validate PNRP ID is not in the list, the Publisher MUST set the N flag in the ACK message.