Set the Master Clock Source

The Master Clock feature is available on Passport 4460 units running software release 4.1.2 or higher. To determine if this feature is available on your Passport 4460 unit, select Attributes, and Unit Hardware. You will see the Unit Hardware window:

If Master Clock is supported on your Passport 4460, Supported will be displayed in the Master Clock field.

1. Set the master clock source. If your physical mode is set to DCE and you want to use the Passport 4460 unit's master clock as the clock source, select Configure, System, and Master Clock.



You will see the Master Clock window:



This window displays the current configured interface and allows you to designate the Master Clock source.

2. Use the pull down menu to select the desired clock source.



If you do not want to designate a master clock for the Passport 4460 unit, select Internal. If you wish to designate a master clock for the Passport 4460 unit, select one of the listed ports. As shown in the Master Clock window above, Base, Port 2 is providing the clock source to the backplane. All other ports on the unit have the option of choosing it as their clock source.

3. After you have made your selection, click Save. The Master Clock setting takes effect immediately. A system reset is not required.

Continue on to Creating a Netlink Between Two Passports that are Physically Connected or Creating a Netlink Across a Public Frame Relay Network.