This object represents the high threshold on the round-trip
time of RADIUS authentication messages. This is measured as a
percentage of configured round-trip time as per RFC-2865. If the
round-trip time is greater than or equal to this threshold, the
agent generates the crRadiusServerRTTHiNotif notification. The
value configured through this object should never be smaller
than that configured through crRadiusServerRTTThldNorm.