tmnxRadSrvPlcyDownTime 1.3.6.1.4.1.6527.3.1.2.79.1.2.2.1.102

The value of tmnxRadSrvPlcyDownTime specifies the hold down time. If a RADIUS authentication server that was detected to be 'outOfService', the system waits for this amount of time before it starts to address that server again.