Dell OpenManage Network Manager Client Manual page 253

If ping fails (an endpoint is down) and update network status is configured, then Dell
OpenManage Network Manager tries to ping the switch/router in front of the endpoint to
determine if that device is reachable. If that device also failed, then the endpoint's status
becomes indeterminate.
Tip
For clarity's sake, best practice has only one monitor per device updating network status. By default
ICMP monitoring enables Update Network Status, and monitors all discovered devices.
NOTE:
Migrating from previous versions automatically replaces any configured Heartbeats with ICMP monitors
with Update Network Status enabled. If your previous system had HTTP or SNMP heartbeats, you must
manually configure monitors to provide equivalent monitoring in this version.
# of Unreachable Attempts before update—The number of attempts to reach the device before
Dell OpenManage Network Manager updates the displayed network status of the device. (1-
100)
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Resource Monitors | Monitoring
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