Chapter 31 Auto PD Recovery
XGS2220 Series User’s Guide
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Once the LLDP table’s counter reaches the default 120 seconds, the Switch will cause a Reboot-Alarm
on the PD as selected in Action.
4 After sending an SNMP trap and generating a log message, the connected PD will restart (the
connecting port is detected as link-down).
When restarting, the PD entry disappears from the Switch’s LLDP table and the PD Health status LED will
turn to yellow in the MONITOR > Neighbor screen.
After the PD is powered on, the Switch resumes detection of the PD status by performing ping requests
or checking the LLDP table based on your value for Resume Polling Interval.
When the PD Reboot Count value is reached, the Switch will no longer perform the PD recovery process.
The PD Health status LED will turn to red in the MONITOR > Neighbor screen.
5 Click Apply to save your changes back to the run-time memory.
6 Click the Save link in the upper right corner of the Web Configurator to save your configuration
permanently.
Note: In the event of a PD performing firmware upgrade, the PD may stop responding to ping
or fail to provide LLDP packets for an extended period of time. When the Switch resets
power to the PD before firmware upgrade is finished, it may permanently damage the
PD or require a hard reset to recover it. It is strongly advised to disable the Switch's Auto
PD Recovery function before upgrading the PD's firmware. This will prevent damage
caused by a power cutoff.
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