The skew time is used to add a time period to the master down interval. This is not a configurable parameter. It is derived from the current local priority of the virtual router VRID. To calculate the skew time, the virtual router evaluates the following formula:
for IPv4 - Skew Time = ((256 – priority) / 256) seconds
for IPv6 - Skew Time = (((256 – priority) * Master_Adver_Interval) / 256) centiseconds
The higher the priority value, the smaller the skew time will be. This means that virtual routers with a lower priority will transition to master slower than virtual routers with higher priorities.