reject(na) --> The CM attempted to register, but registration failed because the CM did not send a Registration-Acknowledgement (REG-ACK) message in reply to the Registration-Response (REG-RSP) messagesent by the CMTS. A Registration-NonAcknowledgement (REG-NACK) is assumed.MAC State Value Cisco CMTS
http://www.slimjim100.com/MAC%20State%20Value%20Cisco%20CMTS.pdf
