Cisco Broadband Cable Command Reference Guide

Chapter 5 Cable CPE Commands
debug cable-modem error
OL-1581-05
debug cable-modem error
To display debugging messages for the cable interface driver, use the debug cable-modem error
command in privileged EXEC mode. To turn off cable interface debugging, use the no form of this
command.
Cisco uBR904, uBR905, uBR924, uBR925 cable access routers, Cisco CVA122 Cable Voice Adapter
debug cable-modem error
no debug cable-modem error
Syntax Description This command has no arguments or keywords.
Command Modes Privileged EXEC
Command History
Usage Guidelines This command displays detailed output about the sanity checking of received frame formats, the
acquisition of downstream QAM/FEC lock, the receipt or non-receipt of SYNC messages from the
CMTS, reception errors, and bandwidth request failures.
In Cisco IOS Release 12.0(5) and later releases, this command is available only under the direction of
TAC or field service, and should be used only while debugging CM operation. Displaying debugging
messages consumes system resources, and turning on too many messages could negatively affect system
performance.
Examples The following shows typical output for the debug cable-modem error command:
Related Commands
Release Modification
11.3(4)NA This command was introduced for the Cisco uBR904 cable access router.
12.0(4)XI1 Support was added for the Cisco uBR924 cable access router.
12.0(5), 12.0(5)T This command was removed from normal access.
Router# debug cable-modem error
Router#
*Mar 7 20:16:29: AcquireSync(): Update rate is 100 Hz
*Mar 7 20:16:30: 1st Sync acquired after 1100 ms.
*Mar 7 20:16:30: Recovery loop is locked (7/9)
*Mar 7 20:16:30: 2nd Sync acquired after 100 ms.
*Mar 7 20:16:30: Recovery loop is locked (10/15)
Command Description
debug cable-modem bpkm Displays information about Baseline Privacy Interface (BPI) key
management.
debug cable-modem bridge Displays bridge filter processing information.
Cisco Broadband Cable Command Reference Guide
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