Cisco Systems UBR900 specifications Show controllers cable-modem mac

show controllers cable-modem mac

show controllers cable-modem mac

To display detailed MAC-layer information for a Cisco uBR900 series, use the show controllers cable-modem mac command in privileged EXEC mode.

show controllers cable-modem number mac [errors hardware log resets state]

Syntax Description

number	Controller number inside the Cisco uBR900 series.
errors	(Optional) Displays a log of the error events that are reported to SNMP. This keyword
	enables you to look at the error events without accessing a MIB.
hardware	(Optional) Displays all MAC hardware registers.
log	(Optional) Displays a history of MAC log messages, up to 1023 entries. This is the same
	output that is displayed when using the debug cable-modem mac log command.
resets	(Optional) Extracts all of the reset causes out of the MAC log file and summarizes them
	in a mini report.
state	(Optional) Displays a summary of the MAC state.

Defaults

No default behavior or values.

Command Modes

Privileged EXEC

Command History

ReleaseModification

11.3 NA This command was introduced.

Usage Guidelines

MAC log messages are written to a circular log file even when debugging is not turned on. These messages include timestamps, events, and information pertinent to these events. Use the show controllers cable-modem mac log command to view MAC log messages.

If the Cisco uBR900 series interface fails to come up or resets periodically, the MAC log will capture what happened. For example, if an address is not obtained from the DHCP server, an error is logged, initialization starts over, and the Cisco uBR900 series scans for a downstream frequency.

The most useful keywords for troubleshooting a Cisco uBR900 series are log, errors, and resets. See Example 1, Example 2, and Example 3.

88Cisco IOS Release 12.0(7)T