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show controllers cable-modem mac
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Router#
In this situation, use the MAC error display also contains information indicating that the DHCP server
could not be reached:
Router# show controllers cable-modem 0 mac errors
497989.804 D01.0
498024.046 D01.0
498058.284 D01.0
Router#
The following is a typical display of the MAC error log information, which is the same information that
is also available using SNMP:
Router# show controllers cable-modem 0 mac errors
74373.574 R02.0
74374.660 R02.0
74375.508 R02.0
74375.748 R02.0
74375.748 R03.0
74376.112 R02.0
74376.354 R02.0
74376.778 R02.0
74377.442 R02.0
Router#
This output indicates that the router 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. The router will try to communicate with the CMTS 16 times, and if
cannot receive a response from the CMTS, it will reset the cable interface to try to find a better
downstream frequency.
The show controllers cable-modem 0 mac resets command shows only the entries in the MAC log that
begin with the field
why the cable interface was reset.
Reset messages and brief explanations are included in the following examples. However, the reset
messages do not commonly occur.
The following example shows the errors that are logged when the configuration file downloaded from
the TFTP server could not be read, typically because the file might not exist, or because the file might
have incorrect permissions.
Router# show controllers cable-modem 0 mac resets
62526.114 CMAC_LOG_RESET_CONFIG_FILE_READ_FAILED
62564.368 CMAC_LOG_RESET_T4_EXPIRED
62677.178 CMAC_LOG_RESET_CONFIG_FILE_READ_FAILED
62717.462 CMAC_LOG_RESET_CONFIG_FILE_READ_FAILED
62757.746 CMAC_LOG_RESET_CONFIG_FILE_READ_FAILED
62796.000 CMAC_LOG_RESET_T4_EXPIRED
62908.808 CMAC_LOG_RESET_CONFIG_FILE_READ_FAILED
Cisco Broadband Cable Command Reference Guide
6-100
873.386 CMAC_LOG_RNG_REQ_TRANSMITTED
873.388 CMAC_LOG_RNG_RSP_MSG_RCVD
873.386 CMAC_LOG_RNG_REQ_TRANSMITTED
873.392 CMAC_LOG_RNG_RSP_MSG_RCVD
873.396 CMAC_LOG_WATCHDOG_TIMER
873.398 CMAC_LOG_RESET_DHCP_WATCHDOG_EXPIRED
873.402 CMAC_LOG_STATE_CHANGE
873.406 CMAC_LOG_DHCP_PROCESS_KILLED
Discover sent no Offer received.
Discover sent no Offer received.
Discover sent no Offer received.
No Ranging Response received.
No Ranging Response received.
No Ranging Response received.
No Ranging Response received.
Ranging Request Retries exhausted.
No Ranging Response received.
No Ranging Response received.
No Ranging Response received.
No Ranging Response received.
. These fields provide you with a summary of the most recent reasons
CMAC_LOG_RESET
Chapter 6
reset_interface_state
No available DHCP Server.
No available DHCP Server.
No available DHCP Server.
T3 time-out.
T3 time-out.
T3 time-out.
T3 time-out.
T3 time-out.
T3 time-out.
T3 time-out.
T3 time-out.
Cable CPE Commands
OL-1581-07
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