Cisco UBR904 Troubleshooting Guide - Page 33

show controllers cable-modem mac *Mar *Mar *Mar *Mar *Mar *Mar *Mar *Mar *Mar *Mar *Mar *Mar *Mar *Mar *Mar *Mar *Mar *Mar *Mar *Mar *Mar *Mar *Mar *Mar 7 01:43:15: 528317.958 CMAC_LOG_RNG_RSP_MSG_RCVD 7 01:43:15: 528317.960 CMAC_LOG_ADJUST_TX_POWER 7 01:43:15: 528317.962 CMAC_LOG_POWER_LEVEL_IS 7 01:43:15: 528317.964 CMAC_LOG_RANGING_CONTINUE 7 01:43:16: 528318.968 CMAC_LOG_RNG_REQ_TRANSMITTED 7 01:43:16: 528318.970 CMAC_LOG_RNG_RSP_MSG_RCVD 7 01:43:16: 528318.974 CMAC_LOG_RANGING_SUCCESS 7 01:43:16: 528318.976 CMAC_LOG_STATE_CHANGE 7 01:43:16: 528318.978 DHCP_COMPLETE 7 01:43:16: 528318.980 CMAC_LOG_STATE_CHANGE 7 01:43:16: 528318.982 CMAC_LOG_TOD_COMPLETE 7 01:43:16: 528318.984 CMAC_LOG_STATE_CHANGE 7 01:43:16: 528318.986 CMAC_LOG_SECURITY_BYPASSED 7 01:43:16: 528318.988 CMAC_LOG_STATE_CHANGE 7 01:43:16: 528318.992 CMAC_LOG_CONFIG_FILE_PROCESS_COMPLETE 7 01:43:16: 528319.028 CMAC_LOG_STATE_CHANGE 7 01:43:16: 528319.030 CMAC_LOG_REG_REQ_MSG_QUEUED 7 01:43:16: 528319.036 CMAC_LOG_REG_REQ_TRANSMITTED 7 01:43:16: 528319.038 CMAC_LOG_REG_RSP_MSG_RCVD 7 01:43:16: 528319.040 CMAC_LOG_COS_ASSIGNED_SID 7 01:43:16: 528319.044 CMAC_LOG_RNG_REQ_QUEUED 7 01:43:16: 528319.046 CMAC_LOG_REGISTRATION_OK 7 01:43:16: 528319.048 CMAC_LOG_STATE_CHANGE 7 01:43:16: 528319.052 CMAC_LOG_STATE_CHANGE 14 34.0 dBmV (commanded) dhcp_state establish_tod_state security_association_state configuration_file_state registration_state 1/4 4 establish_privacy_state maintenance_state If the DHCP server could not be reached, the error would look like this in the MAC log: 497959.800 CMAC_LOG_STATE_CHANGE 497969.864 CMAC_LOG_RNG_REQ_TRANSMITTED 497969.866 CMAC_LOG_RNG_RSP_MSG_RCVD 497979.936 CMAC_LOG_RNG_REQ_TRANSMITTED 497979.938 CMAC_LOG_RNG_RSP_MSG_RCVD 497989.802 CMAC_LOG_WATCHDOG_TIMER 497989.804 CMAC_LOG_RESET_DHCP_WATCHDOG_EXPIRED 497989.804 CMAC_LOG_STATE_CHANGE 497989.806 CMAC_LOG_DHCP_PROCESS_KILLED dhcp_state reset_interface_state The fields in this display are explained in the "Step 4-Interpret the MAC Log File and Take Action" section on page 10. Example 2 MAC error log information is displayed in the following example, which is also reported via SNMP: uBR904# show controllers cable-modem 0 mac errors 74373.574 R02.0 No Ranging Response received. T3 time-out. 74374.660 R02.0 No Ranging Response received. T3 time-out. 74375.508 R02.0 No Ranging Response received. T3 time-out. 74375.748 R02.0 No Ranging Response received. T3 time-out. 74375.748 R03.0 Ranging Request Retries exhausted. 74376.112 R02.0 No Ranging Response received. T3 time-out. 74376.354 R02.0 No Ranging Response received. T3 time-out. 74376.778 R02.0 No Ranging Response received. T3 time-out. 74377.442 R02.0 No Ranging Response received. T3 time-out. This output indicates that the cable modem acquired a downstream lock, successfully read a UCD, and successfully read a MAP. However, it was unable to communicate with the CMTS after ranging through all upstream transmit power levels (from 8 dBmv to 61 dBmv). The cable modem tried to communicate with the CMTS 16 times without success, after which it reset the cable interface to try to find a better downstream frequency. Troubleshooting Tips for the Cisco uBR904 Cable Modem 33