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In most production environments, it is essential to monitor the uptime of critical network devices in the infrastructure. By tracking the uptime of each of the devices, administrators can determine what percentage of time a device has been up. Comparing this value with service level targets, administrators can determine the most trouble-prone areas of the infrastructure.

In some environments, administrators may schedule periodic reboots of their network devices. By knowing that a specific device has been up for an unusually long time, an administrator may come to know that the scheduled reboot task is not working on a device.

This RbtSteelUptimeTest test monitors the uptime of critical network devices.

Outputs of the test : One set of results for every Riverbed Steelhead device is being monitored.

Measurement	Description	Measurement Unit	Interpretation
Rebooted	Indicates whether the device has been rebooted during the last measurement period or not.	Boolean	If this measure shows 1, it means that the device was rebooted during the last measurement period. By checking the time periods when this metric changes from 0 to 1, an administrator can determine the times when this Steelhead device was rebooted.
Total_uptime	Indicates the total time that the device has been up since its last reboot.	Minutes	Administrators may wish to be alerted if the device has been running without a reboot for a very long period. Setting a threshold for this metric allows administrators to determine such conditions.
Uptime	Indicates the time period that the device has been up since the last time this test ran.	Seconds	If the device has not been rebooted during the last measurement period and the agent has been running continuously, this value will be equal to the measurement period. If the server was rebooted during the last measurement period, this value will be less than the measurement period of the test. For example, if the measurement period is 300 secs, and if the server was rebooted 120 secs back, this metric will report a value of 120 seconds. The accuracy of this metric is dependent on the measurement period - the smaller the measurement period, greater the accuracy.