Cisco Broadband Cable Command Reference Guide

debug cable mac-address
debug cable mac-address
Syntax Description
Command Modes Privileged EXEC
Command History
4-36
Cisco Broadband Cable Command Reference Guide
Chapter 4 Cisco Cable Modem Termination System Debugging Commands
To display debug information for a specific CM, use the debug cable mac command in privileged EXEC
mode. The no form of this command disables debugging output.
debug cable mac-address address [address-mask] [verbose]
no debug cable mac-address address [address-mask] [verbose]
address Specifies the particular MAC address to debug.
address-mask Specifies an address mask to indicate a range of addresses to debug. This
mask is bit-ANDed with the given address, and debug messages are
displayed for any CM that matches the resulting non-zero bits.
verbose Specifies detailed output for the particular MAC address.
Release Modification
12.1 T This command was introduced.
Usage Guidelines You can repeat this command for other MAC addresses. Each time you specify a different MAC address,
debugging is turned on for that particular MAC address.
If you enter two commands with the same MAC address, but with different values for the mask or
verbose keywords, the router treats both commands as the same. In this case, the latest debugging
information supersedes the previous debugging information.
Note Do not use this command if you have a large number of CMs on your network. The Cisco CMTS will
become flooded with console printouts.
Examples The following example demonstrates how to enable debugging for all traffic coming from cable
interface 3/0 of CMs with the MAC address 00E0.1Exx.xxxx:
Router# debug cable interface c3/0
Router# debug cable mac-address 00E0.1E00.0000 ffff.ff00.0000
Router#
004042: Jul 2 08:47:13.656: Ranging Modem 00E0.1E23.4567, SID 73 on Interface Cable3/U0
004043: Jul 2 08:47:13.656: Ranging request from 00E0.1E23.4567, SID 73 [73] on Interface
Cable3/U0
004044: Jul 2 08:47:13.656: Timing error 0, power error 0.25dB, freq error 4 (adjust 0)
004045: Jul 2 08:47:13.656: Ranging successfulf
Tip To monitor a specific CM when it comes online, use the debug cable mac-address, debug cable
mac-protocol, and debug cable registration commands.
OL-1581-05