Configuring the Clock Card

To continue the Cisco Cable Clock Card installation, you must configure the primary and/or secondary T1 interfaces. This chapter contains the following sections:

Minimum Software Requirements

To effectively configure the clock card, you must have Cisco IOS Release 12.1(1)T or later version of Cisco IOS Release 12.1 T.

Configuration and Diagnostic CIsco IOS Commands for the Clock Card

Table 4-1 presents a list of basic configuration and diagnostic Cisco IOS commands that you can use to initially configure and troubleshoot clock card installation. For complete command-line syntax examples and more definitive explanations of command-line functions, refer to the Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide.

Table 4-1: Cisco IOS Commands for the Clock Card and Their Descriptions

Command Line Description

Exec Commands

show cable clock

Displays clock card status information like primary and secondary connections' source and status, timestamp reference information, current clock card mode of operation, any hardware fault, and the midplane clock signal source, if active.

show controllers clock-reference

Displays clock card hardware information and current register values.

cable clock clear-counters

Instructs the router to reset the counters displayed by the show controllers clock-reference command.

Config Commands

[ no ] cable clock source-midplane

Instructs the clock card to lock on to and propagate the router's internal TDM midplane clock signal.

[ no ] cable clock force
{primary | secondary}

Forces activation or deactivation of the primary or secondary interface. (Cannot be executed if holdover mode is not possible.)

Support Commands

show version

Displays critical information about the router, including the presence of a clock card, if one is installed.

show tech-support

Prints information regarding the router's current status, including the clock card timing reference, if a clock card is installed.

show diag

Displays diagnostic information about the router, including critical clock card information, if a clock card is installed.

Command Line	Description
Exec Commands
show cable clock	Displays clock card status information like primary and secondary connections' source and status, timestamp reference information, current clock card mode of operation, any hardware fault, and the midplane clock signal source, if active.
show controllers clock-reference	Displays clock card hardware information and current register values.
cable clock clear-counters	Instructs the router to reset the counters displayed by the show controllers clock-reference command.
Config Commands
[ no ] cable clock source-midplane	Instructs the clock card to lock on to and propagate the router's internal TDM midplane clock signal.
[ no ] cable clock force {primary \| secondary}	Forces activation or deactivation of the primary or secondary interface. (Cannot be executed if holdover mode is not possible.)
Support Commands
show version	Displays critical information about the router, including the presence of a clock card, if one is installed.
show tech-support	Prints information regarding the router's current status, including the clock card timing reference, if a clock card is installed.
show diag	Displays diagnostic information about the router, including critical clock card information, if a clock card is installed.

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