APC Network Management Card AP9617 User's Guide download pdf (Page 17)

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USER’S GUIDE

network management card

Watchdog Features

Overview

The Management Card is designed to recover from unanticipated inputs.

Through the use of internal, system-wide watchdog mechanisms, the

Management Card can detect most internal problems. When it does, it

reboots itself to recover from the internal problem. This results in a System:

Warmstart event being recorded in the Event Log.

Network interface watchdog mechanism

The Management Card implements numerous internal watchdog

mechanisms to protect itself from becoming inaccessible over the network.

One of these mechanisms ensures that the Management Card can receive

network traffic: if within an approximately 9.5-minute period the

Management Card does not receive any network traffic (either direct, such

SNMP, or broadcast, such as an Address Resolution Protocol [ARP]

request) then it will assume that there is a problem with its network interface

and reboot itself.

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APC Network Management Card AP9617 User's Guide Page 17