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USER’S GUIDE

InRow RC ACRC100 Series

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 InRow RC 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 InRow RC implements internal watchdog mechanisms to protect itself from

becoming inaccessible over the network. For example, if the InRow RC 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 InRow RC does not restart if the network is quiet for 9.5 minutes, the

InRow RC attempts to contact the Default Gateway every 4.5 minutes. If the gateway is

present, it responds to the InRow RC, and that response restarts the 9.5-minute timer.

If your application does not require or have a gateway, specify the IP address of a

computer that is running on the network most of the time and is on the same subnet.

The network traffic of that computer will reset the 9.5-minute timer frequently enough to

prevent the InRow RC from restarting.

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Cooline DWL SERIES Guía de usuario Pagina 12