Cisco Broadband Cable Command Reference Guide

Chapter 4 Cisco Cable Modem Termination System Debugging Commands
debug cable dcc
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Cisco Broadband Cable Command Reference Guide
debug cable dcc
To display information about DOCSIS 1.1 Dynamic Channel Change (DCC) messages, use the debug
cable dcc command in Privileged EXEC mode. To disable debugging output for DCC messages, use the
no form of this command.
debug cable dcc
no debug cable dcc
Syntax Description This command has no arguments or keywords.
Defaults No default behavior or values.
Command Modes Privileged EXEC
Command History
Release Modification
12.1(7)CX This command was introduced for DOCSIS 1.1 operation.
12.2(4)BC1 Support was added to the Release 12.2 BC train.
Usage Guidelines This command shows debugging messages about the DCC Request (DCC-REQ) message that the CMTS
sends to the CM, and about the DCC Response (DCC-RSP) message that the CM sends in reply.
Caution The debug commands are primarily intended for use in controlled test and troubleshooting situations
with a limited volume of traffic. In particular, avoid using the debug cable dcc command on an interface
with a significant number of CMs, because the resulting volume of debug output could impact system
performance. Cisco recommends that when you use the debug cable dcc command, you limit its output
to a particular interface or CM, using the debug cable interface command.
Tip To display the contents of the DCC messages, enable TLV debugging with the debug cable tlvs
command.
Note See the DOCSIS 1.1 specification (revision SP-RFIv1.1-I05-000714 and above) for information on the
content and format of the DCC-REQ and DCC-RSP messages.
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