This value is an estimate of how many clock cycles elapse between a clock synchronization packet being sent from the adjacent switch chip and the node's switch time-of-day register actually being loaded. The dependent node needs this delay value to correctly build the packet it sends to the adjacent switch chip to trigger a clock synchronization reply, compensating for that propagation and processing delay. For example, an admin fine-tuning clock synchronization accuracy on a dependent node might adjust ibmSPDepNodeDelay if time-of-day readings appear consistently skewed relative to the rest of the SP switch network.