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Why doesn't Spirent TestCenter enable the Unicast bit when Unicast Negotiation is selected for IEEE-1588v2 testing?

Answer

This behavior is expected if the clock doesn't have "Unicast Discovery" enabled. 

In the configuration in question, the device with only "Unicast Negotiation" enabled, is a grantor only and thus will not have the unicast bit set.

 


Product : Spirent TestCenter,IEEE 1588