This is the percent of the SYNC line bandwidth that
the network manager wishes to allocate to traffic
which has been configured to be High Priority.
This parameter only has meaning when the bandwidth allocation
dequeueing algorithm is enabled by setting the dequeueing
algorithm type appropriately.
With this parameter
set other than 100, each time the configured percent
utilization is reached, Normal and Low traffic is
sent out (if any is queued up), up to their
configured percentages.