42Chapter 4 Configuring the Passport 8250 for operations

Table 4 (continued)

Clockconfig command parameters

Parameter

Values

Definition

 

 

 

Admin Reference

0 = Internal = The clock is

The clock source.

Clock Source

derived from the Passport

 

 

8250.

 

 

1 = External Primary = clock

 

 

derived from the primary port.

 

 

2 = External Primary Automatic

 

 

Switching = Clock derived from

 

 

the primary port. Switch to

 

 

secondary port if problem with

 

 

secondary port.

 

 

3 = External Secondary =

 

 

Clock is derived from the

 

 

secondary port.

 

 

 

 

Operational

Internal (default),

The current clock

Reference Clock

ExternalPrimary, and

source.

Source

ExternalSecondary.

 

 

 

 

(Sheet 2 of 2)

Setting the clocking scheme to External Primary

1Display the clockconfig parameters: clockconfig [set]

2For External Primary Board Number, enter a board number.

3For External Primary Port Number, enter a port number.

4For External Secondary Board Number, press enter to accept the default value and move to the next field.

5For External Secondary Port Number, press enter to accept the default value and move to the next field.

6For Admin Reference Clock Source, enter 1 for ExternalPrimary:

Admin Reference Clock Source: Internal 1

Example

The following is an example of setting port 10 on service board 2 as the primary port. The clocking scheme is set to ExternalPrimary.

241-5101-200 R2.2

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Nortel Networks 8250, 241-5101-200 manual Setting the clocking scheme to External Primary, Example
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241-5101-200, 8250 specifications

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