Cisco SR2016T-NA Reference Manual page 886

Chapter 5 Cisco CMTS Debugging Commands
debug cable dynamic-secret
02:16:15: Registration Response Transmitted
Router#
The following example shows the typical messages that are shown when you use the clear cable modem
lock command to clear the lock on one or more cable modems that have failed the Dynamic Shared
Secret checks and were locked into restrictive quality of service (QoS) configurations:
Router# clear cable modem all lock
01:46:37: Closing file for modem 00c0.2854.73f5: New modem state from online to offline
01:46:37: Closing file for modem 00c0.734e.b4aa: New modem state from online(pt) to
offline
01:46:37: Closing file for modem 00c0.7366.17cb: New modem state from init(d) to offline
01:46:37: Closing file for modem 00c0.80bc.22b5: New modem state from online to offline
Router#
The following debug message is displayed when the CMTS has verified the CMTS MIC in a
Data-over-Cable Service Interface Specifications (DOCSIS) configuration file against the shared secret
that is configured on a cable interface:
Validated against Shared secret
The CMTS displays the following debug message when the CMTS has verified the CMTS MIC in a
DOCSIS configuration file against one of the 16 possible secondary shared secrets that are configured
on a cable interface:
Validated against secondary secret 11
The CMTS displays the following debug message when the CMTS obtains a new DOCSIS configuration
file from the TFTP server. The CMTS keeps this file in its internal cache for 30 seconds, so that it can
be used for other cable modems that might request it.
Creating new cache for config-file.cm @ 10.10.10.21
The CMTS displays the following debug messages when it receives a registration request or TFTP
request for a DOCSIS configuration file from a device that is not a cable modem. This can indicate that
a user is trying to manually download a DOCSIS configuration file so that it can be decoded and
modified.
MAC address 0102.0304.0506 not of a CM
MAC Address 0102.0304.0506, IP address 10.10.10.13 is not a modem
The CMTS displays the following debug message when it receives a TFTP request for an unknown TFTP
server. This can indicate that a user is trying to download a DOCSIS configuration file from a local TFTP
server.
TFTP server unknown for CM 0102.0304.0506
The CMTS displays the following debug message when it receives a TFTP request for a non-cable
interface. This can indicate that a user is trying to spoof an IP or Ethernet MAC address, and is trying to
access a TFTP server through the Internet or a local network.
TFTP request from a non-cable interface GE1/0/0 ignored
The CMTS displays the following debug messages when it receives a TFTP request for a DOCSIS
configuration file that is not available on the TFTP server:
16:11:33: Could not locate bootfile name for 0102.0304.0506
16:11:33: Cannot locate config-file.cm requested by CM 0102.0304.0506
16:11:33: Closing file for modem 0102.0304.0506: New modem state from init(rc) to offline
Cisco Broadband Cable Command Reference Guide
5-26
OL-1581-08