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Chapter 8: Managing External Devices
166
Field
Description
Wait Time (in
seconds) before
Resuming Pinging
The wait time before the EMX resumes
pinging after the monitored equipment is
declared unreachable. Valid range is 1 to
1200 (seconds).
5. Click OK to save the changes.
6. To add more IT devices, repeat Steps 2 to 5.
7. Click Close to quit the dialog.
In the beginning, the status of the monitored equipment shows "Waiting
for reliable connection," which means the requested number of
consecutive successful or unsuccessful pings has not reached before the
EMX can declare that the monitored device is reachable or unreachable.
Example: Ping Monitoring and SNMP Notifications
In this illustration, it is assumed that a significant PDU (IP address:
192.168.84.95) shall be monitored by your EMX to make sure that PDU
is properly operating all the time, and the EMX must send out SNMP
notifications (trap or inform) if that PDU is declared unreachable due to
power or network failure. The prerequisite for this example is that the
power source for your EMX is different from the power source for that
PDU.
This requires two steps: set up the PDU monitoring and create an event
rule.
Step 1: Set up the ping monitoring for the target PDU
1. Choose Device Settings > Server Reachability. The Server
Reachability dialog appears.
2. Type 192.168.84.95 in the IP Address/Hostname field.
3. To make the EMX declare the accessibility of the monitored PDU
every 15 seconds (3 pings * 5 seconds) when that PDU is
accessible, do the following:
a. In the Number of Successful Pings to Enable Feature field, type
3.
b. In the Wait Time (in seconds) after Successful Ping field, type 5.
4. To make the EMX declare the inaccessibility of the monitored PDU
when that PDU becomes inaccessible for around 12 seconds (4
pings * 3 seconds), do the following:
a. In the Number of Consecutive Unsuccessful Unsuccessful Pings
for Failure field, type 4.
b. In the Wait Time (in seconds) after Unsuccessful Ping field, type
3.