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Chapter 4 Configuring the Passport 8250 for operations 43
Passport 8250 Installation Guide R2.2
[E1-1]: clockconfig set
External Primary Board Number (0 - 3) = 0 2
External Primary Port Number (1 - 16) = 3 10
External Secondary Board Number = 0
External Secondary Port Number = 3
Admin Reference Clock Source: Internal 1
Setting the clocking scheme to ExternalSecondary
1 Display the clockconfig parameters:
clockconfig set
2 For External Primary Board Number, press enter to accept the default
value and move to the next field.
3 For External Primary Port Number, press enterto accept thedefault value
and move to the next field.
4 For External Secondary Board Number, enter a board number.
5 For External Secondary Port Number, enter a port number.
6 For Admin Reference Clock Source, enter 3 for ExternalSecondary:
Admin Reference Clock Source: ExternalPrimary 3
Example
The following is an example of switching from the primary port
configured in “Setting the clocking scheme to External Primary”
(page 42) to a secondary port. The secondary port is the default ATM
uplink port on the network board. The clocking scheme is
ExternalSecondary.
[E1-1]: clockconfig set
External Primary Board Number (0 - 3) = 2
External Primary Port Number (1 - 16) = 10
External Secondary Board Number = 0
External Secondary Port Number = 3
Admin Reference Clock Source: ExternalPrimary 3
Setting the clocking scheme to External Primary Automatic
Switching
1 Display the clockconfig parameters: