show controllers cable-modem mac
90 Cisco IOS Release 12.0(7)T
00:14:32: 872.856 CMAC_LOG_RANGING_SUCCESS
00:14:32: 872.874 CMAC_LOG_STATE_CHANGE dhcp_state
00:14:33: 873.386 CMAC_LOG_DHCP_ASSIGNED_IP_ADDRESS 188.188.1.62
00:14:33: 873.388 CMAC_LOG_DHCP_TFTP_SERVER_ADDRESS 4.0.0.32
00:14:33: 873.392 CMAC_LOG_DHCP_TOD_SERVER_ADDRESS 4.0.0.32
00:14:33: 873.396 CMAC_LOG_DHCP_SET_GATEWAY_ADDRESS
00:14:33: 873.398 CMAC_LOG_DHCP_TZ_OFFSET 60
00:14:33: 873.402 CMAC_LOG_DHCP_CONFIG_FILE_NAME platinum.cm
00:14:33: 873.406 CMAC_LOG_DHCP_ERROR_ACQUIRING_SEC_SVR_ADDR
00:14:33: 873.410 CMAC_LOG_DHCP_COMPLETE
00:14:33: 873.536 CMAC_LOG_STATE_CHANGE establish_tod_state
00:14:33: 873.546 CMAC_LOG_TOD_REQUEST_SENT
00:14:33: 873.572 CMAC_LOG_TOD_REPLY_RECEIVED 3140961992
00:14:33: 873.578 CMAC_LOG_TOD_COMPLETE
00:14:33: 873.582 CMAC_LOG_STATE_CHANGE security_association_state
00:14:33: 873.584 CMAC_LOG_SECURITY_BYPASSED
00:14:33: 873.588 CMAC_LOG_STATE_CHANGE configuration_file_state
00:14:33: 873.592 CMAC_LOG_LOADING_CONFIG_FILE platinum.cm
00:14:34: %LINEPROTO-5-UPDOWN: Line protocol on Interface cable-modem0, changed state to up
00:14:34: 874.728 CMAC_LOG_CONFIG_FILE_PROCESS_COMPLETE
00:14:34: 874.730 CMAC_LOG_STATE_CHANGE registration_state
00:14:34: 874.734 CMAC_LOG_REG_REQ_MSG_QUEUED
00:14:34: 874.744 CMAC_LOG_REG_REQ_TRANSMITTED
00:14:34: 874.754 CMAC_LOG_REG_RSP_MSG_RCVD
00:14:34: 874.756 CMAC_LOG_COS_ASSIGNED_SID 1/16
00:14:34: 874.760 CMAC_LOG_RNG_REQ_QUEUED 16
00:14:34: 874.768 CMAC_LOG_REGISTRATION_OK
00
:14:34: 874.770 CMAC_LOG_REG_RSP_ACK_MSG_QUEUED 0
00:14:34: 874.774 CMAC_LOG_STATE_CHANGE establish_privacy_state
00:14:34: 874.778 CMAC_LOG_PRIVACY_NOT_CONFIGURED
00:14:34: 874.780 CMAC_LOG_STATE_CHANGE maintenance_state
00:14:34: 874.784 CMAC_LOG_REG_RSP_ACK_MESSAGE_EVENT
00:14:34: 874.788 CMAC_LOG_REG_RSP_ACK_MSG_SENT
If the DHCP server cannot not be reached, the error will look like this in the MAC log:
00:14:32: 872.874 CMAC_LOG_STATE_CHANGE dhcp_state
00:14:33: 873.386 CMAC_LOG_RNG_REQ_TRANSMITTED
00:14:33: 873.388 CMAC_LOG_RNG_RSP_MSG_RCVD
00:14:33: 873.386 CMAC_LOG_RNG_REQ_TRANSMITTED
00:14:33: 873.392 CMAC_LOG_RNG_RSP_MSG_RCVD
00:14:33: 873.396 CMAC_LOG_WATCHDOG_TIMER
00:14:33: 873.398 CMAC_LOG_RESET_DHCP_WATCHDOG_EXPIRED
00:14:33: 873.402 CMAC_LOG_STATE_CHANGE reset_interface_state
00:14:33: 873.406 CMAC_LOG_DHCP_PROCESS_KILLED
The fields in this display are explained in the section “Basic Troubleshooting” on page23.
Example 2MAC error log information is displayed in the following example, which is also reported via SNMP:
uBR924# 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.