This object represents the normal 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 less than or equal to this
threshold, the agent generates the crRadiusServerRTTNormNotif
notification. The value configured through this object should
never be greater than that configured through
crRadiusServerRTTThldHi.