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42 Chapter 4 Configuring the Passport 8250 for operations
241-5101-200 R2.2
Setting the clocking scheme to External Primary
1 Display the clockconfig parameters:
clockconfig [set]
2 For External Primary Board Number, enter a board number.
3 For External Primary Port Number, enter a port number.
4 For External Secondary Board Number, press enter to accept the default
value and move to the next field.
5 For External Secondary Port Number, press enter to accept the default
value and move to the next field.
6 For 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.
Admin Reference
Clock Source
0 = Internal = The clock is
derived from the Passport
8250.
1 = External Primary = clock
derived from the primary port.
2 =ExternalPrimary 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.
The clock source.
Operational
Reference Clock
Source
Internal (default),
ExternalPrimary, and
ExternalSecondary.
The current clock
source.
Table 4 (continued)
Clockconfig command parameters
Parameter Values Definition
(Sheet 2 of 2)