Cisco UBR904 Troubleshooting Guide - Page 14

Troubleshooting Steps Event 8-Transfer Operational Parameters After the DHCP and security operations are successful, the cable modem downloads operational parameters from the cable company's TFTP server. These parameters are transferred via a configuration file. The field CMAC_LOG_DHCP_CONFIG_FILE_NAME shows the filename containing the transmission parameters. 508177.164 CMAC_LOG_STATE_CHANGE 508177.166 CMAC_LOG_LOADING_CONFIG_FILE 508178.280 CMAC_LOG_CONFIG_FILE_PROCESS_COMPLETE configuration_file_state platinum.cm Event 9-Perform Registration The cable modem registers with the headend Cisco uBR7246. After the cable modem is initialized, authenticated, and configured, the cable modem is authorized to forward traffic into the cable network. A successful registration is indicated by the field CMAC_LOG_REGISTRATION_OK. 508178.300 CMAC_LOG_STATE_CHANGE 508178.302 CMAC_LOG_REG_REQ_MSG_QUEUED 508178.306 CMAC_LOG_REG_REQ_TRANSMITTED 508178.310 CMAC_LOG_REG_RSP_MSG_RCVD 508178.312 CMAC_LOG_COS_ASSIGNED_SID 508178.314 CMAC_LOG_RNG_REQ_QUEUED 508178.316 CMAC_LOG_REGISTRATION_OK registration_state 1/2 2 Event 10-Comply with Baseline Privacy Keys for baseline privacy are exchanged between the cable modem and the headend Cisco uBR7246. During this event, a link level encryption is performed so that a user's data cannot be "sniffed" by anyone else who is on the cable network. Following is a trace that shows baseline privacy enabled. The key management protocol is responsible for exchanging two types of keys: KEKs and TEKs. The KEK (key exchange key, also referred to as the authorization key) is used by the headend CMTS to encrypt the TEKs (traffic encryption keys) it sends to the cable modem. The TEKs are used to encrypt/decrypt the data. There is a TEK for each SID configured to use privacy. 851.088 CMAC_LOG_STATE_CHANGE establish_privacy_state 851.094 CMAC_LOG_PRIVACY_FSM_STATE_CHANGE machine: KEK, event/state: EVENT_1_PROVISIONED/STATE_A_START, new state: STATE_B_AUTH_WAIT 851.102 CMAC_LOG_BPKM_REQ_TRANSMITTED 851.116 CMAC_LOG_BPKM_RSP_MSG_RCVD 851.120 CMAC_LOG_PRIVACY_FSM_STATE_CHANGE machine: KEK, event/state: EVENT_3_AUTH_REPLY/STATE_B_AUTH_WAIT, new state: STATE_C_AUTHORIZED 856.208 CMAC_LOG_PRIVACY_FSM_STATE_CHANGE machine: TEK, event/state: EVENT_2_AUTHORIZED/STATE_A_START, new state: STATE_B_OP_WAIT 856.220 CMAC_LOG_BPKM_REQ_TRANSMITTED 856.224 CMAC_LOG_BPKM_RSP_MSG_RCVD 856.230 CMAC_LOG_PRIVACY_FSM_STATE_CHANGE machine: TEK, event/state: EVENT_8_KEY_REPLY/STATE_B_OP_WAIT, new state: STATE_D_OPERATIONAL 856.326 CMAC_LOG_PRIVACY_INSTALLED_KEY_FOR_SID 2 856.330 CMAC_LOG_PRIVACY_ESTABLISHED Note In order for baseline privacy to work, you must use code image names containing the characters "k1" on both the uBR904 (the subscriber end) and the uBR7246 (the headend). In addition, privacy must be turned on in the configuration file that is downloaded to the uBR904. 14 Cisco IOS Release 12.0(3)T