Display Interface LEDs
Status
This LED indicates the status of the cooling unit.
Condition | Description |
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Off | The cooling unit has no power. |
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Solid Green | The cooling unit is receiving power. |
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Flashing Green | The cooling unit is receiving a firmware upgrade. |
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Check log
When yellow, this LED indicates that at least one new critical alarm, warning alarm, or event has occurred since the last time the event log was viewed from the display interface.
Warning alarm
When yellow, this LED indicates that a warning alarm condition exists and may require your attention to prevent it from deteriorating into a critical state. A new alarm will cause a beep every 30 seconds until you silence the alarm by pressing any function key.
Critical alarm
When red, this LED indicates that a critical alarm condition exists and requires your immediate attention. An audible alarm beeps every 30 seconds. Press any function key to silence the audible alarm.
Watchdog Features
Overview
To detect internal problems and recover from unanticipated inputs, the cooling unit uses internal, system- wide watchdog mechanisms. When it reboots to recover from an internal problem, a System: Warmstart event is recorded in the event log.
Network interface watchdog mechanism
The cooling unit implements internal watchdog mechanisms to protect itself from becoming inaccessible over the network. For example, if the cooling unit does not receive any network traffic for 9.5 minutes (either direct traffic, such as SNMP, or broadcast traffic, such as an Address Resolution Protocol [ARP] request), it assumes that there is a problem with its network interface and restarts.
Resetting the network timer
To ensure that the cooling unit does not restart if the network is quiet for 9.5 minutes, the cooling unit attempts to contact the Default Gateway every 4.5 minutes. If the gateway is present, it responds to the cooling unit, and that response restarts the
InRow RC/RD/RP (600 mm) User’s Guide | 5 |