Clock and Data Recovery (CDR) is a process that is dependent upon a clock signal synchronous with the data flow. When a data flow arrives at the receiver, it is sent without additional clocking information, the receiver generates a clock from an approximate frequency reference, and then phase-aligns the clock to the transitions in the data flow with a phase-locked loop (PLL). Data distortion, noise, and jitter on the incoming data can be reduced if the CDR technology is used for data recovery from the transmission channel.

NOTE:

- CDR function can only be configured on the 100G or 40G optical module interface and the four interfaces it breaked out from.
- The CDR configurations of the four interfaces which breaked out from the 100G or 40G optical module interface should be the same.

Procedure

- Use the following command to disable or enable the CDR function.

set interface gigabit-ethernet <interface-name> cdr [true | false]

The default setting is true. The command takes effect immediately after committing.

Configuration Example

Enable the CDR function on interface te-1/1/49.

admin@Xorplus# set interface gigabit-ethernet te-1/1/49 cdr true
admin@Xorplus# commit

Disable the CDR function on interface te-1/1/49.

admin@Xorplus# set interface gigabit-ethernet te-1/1/49 cdr false
admin@Xorplus# commit

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