Troubleshooting guide
7-15
Cisco Broadband Local Integrated Services Solution Troubleshooting Guide
OL-5169-01
Chapter 7 Troubleshooting the CMTS
Troubleshooting the Cisco uBR7246VXR
Since the Cable Modem has reached as far as init(i) we know that it has got as far as obtaining an IP
address. This can be clearly shown in the output display of the debug cable-modem mac log verbose
command from the cable modem below:
3d20h: 334402.548 CMAC_LOG_RANGING_SUCCESS
3d20h: 334402.548 CMAC_LOG_STATE_CHANGE dhcp_state
NOTE—IP address Assigned to CM:
3d20h: 334415.492 CMAC_LOG_DHCP_ASSIGNED_IP_ADDRESS 10.1.1.20
3d20h: 334415.492 CMAC_LOG_DHCP_TFTP_SERVER_ADDRESS 172.17.110.136
3d20h: 334415.492 CMAC_LOG_DHCP_TOD_SERVER_ADDRESS 172.17.110.136
3d20h: 334415.492 CMAC_LOG_DHCP_SET_GATEWAY_ADDRESS
3d20h: 334415.492 CMAC_LOG_DHCP_TZ_OFFSET 0
NOTE—DOCSIS file CM is trying to load:
3d20h: 334415.496 CMAC_LOG_DHCP_CONFIG_FILE_NAME nofile
3d20h: 334415.496 CMAC_LOG_DHCP_ERROR_ACQUIRING_SEC_SVR_ADDR
3d20h: 334415.496 CMAC_LOG_DHCP_ERROR_ACQUIRING_LOG_ADDRESS
3d20h: 334415.496 CMAC_LOG_DHCP_COMPLETE
3d20h: 334415.508 CMAC_LOG_STATE_CHANGE establish_tod_state
3d20h: 334415.512 CMAC_LOG_TOD_REQUEST_SENT 172.17.110.136
3d20h: 334415.524 CMAC_LOG_TOD_REPLY_RECEIVED 3178343318
3d20h: 334415.524 CMAC_LOG_TOD_COMPLETE
3d20h: 334415.528 CMAC_LOG_STATE_CHANGE security_association_state
3d20h: 334415.528 CMAC_LOG_SECURITY_BYPASSED
3d20h: 334415.528 CMAC_LOG_STATE_CHANGE configuration_file
NOTE—DOCSIS file name:
3d20h: 334415.528 CMAC_LOG_LOADING_CONFIG_FILE nofile
133.CABLEMODEM.CISCO: 3d20h: %LINEPROTO-5-UPDOWN: Line protocol on Interface cap
3d20h: 334416.544 CMAC_LOG_CONFIG_FILE_TFTP_FAILED -1
3d20h: 334416.548 CMAC_LOG_CONFIG_FILE_PROCESS_COMPLETE
3d20h: 334416.548 CMAC_LOG_RESET_CONFIG_FILE_READ_FAILED
Similarly, TFTP server issues would give similar errors resulting in the cable modem resetting and
cycling through the same process indefinitely:
3d21h: 336136.520 CMAC_LOG_STATE_CHANGE dhcp_state
3d21h: 336149.404 CMAC_LOG_DHCP_ASSIGNED_IP_ADDRESS 10.1.1.20
NOTE—TFTP Server address
3d21h: 336149.404 CMAC_LOG_DHCP_TFTP_SERVER_ADDRESS 172.17.110.100
3d21h: 336149.404 CMAC_LOG_DHCP_TOD_SERVER_ADDRESS 172.17.110.136
3d21h: 336149.404 CMAC_LOG_DHCP_SET_GATEWAY_ADDRESS
3d21h: 336149.404 CMAC_LOG_DHCP_TZ_OFFSET 0
3d21h: 336149.408 CMAC_LOG_DHCP_CONFIG_FILE_NAME platinum.cm
3d21h: 336149.408 CMAC_LOG_DHCP_ERROR_ACQUIRING_SEC_SVR_ADDR
3d21h: 336149.408 CMAC_LOG_DHCP_ERROR_ACQUIRING_LOG_ADDRESS
3d21h: 336149.408 CMAC_LOG_DHCP_COMPLETE
3d21h: 336149.420 CMAC_LOG_STATE_CHANGE establish_tod_state
3d21h: 336149.424 CMAC_LOG_TOD_REQUEST_SENT 172.17.110.136
3d21h: 336149.436 CMAC_LOG_TOD_REPLY_RECEIVED 3178345052
3d21h: 336149.436 CMAC_LOG_TOD_COMPLETE
3d21h: 336149.440 CMAC_LOG_STATE_CHANGE security_association_state
3d21h: 336149.440 CMAC_LOG_SECURITY_BYPASSED
3d21h: 336149.440 CMAC_LOG_STATE_CHANGE configuration_file
3d21h: 336149.440 CMAC_LOG_LOADING_CONFIG_FILE platinum.cm
133.CABLEMODEM.CISCO: 3d21h: %LINEPROTO-5-UPDOWN: Line protocol on Interface cap
3d21h: 336163.252 CMAC_LOG_RNG_REQ_TRANSMITTED
3d21h: 336163.252 CMAC_LOG_RNG_RSP_MSG_RCVD
NOTE—TFTP process failing:
3d21h: 336165.448 CMAC_LOG_CONFIG_FILE_TFTP_FAILED -1
3d21h: 336165.448 CMAC_LOG_CONFIG_FILE_PROCESS_COMPLETE
3d21h: 336165.452 CMAC_LOG_RESET_CONFIG_FILE_READ_FAILED
3d21h: 336165.452 CMAC_LOG_STATE_CHANGE reset_interface_state