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Chapter 32 Auto PD Recovery
XGS2220 Series User’s Guide
223
32.2.1 Activate the Automatic PD Recovery
Follow the steps below to activate the automatic PD recovery.
1 In the PORT > Auto PD Recovery screen, activate the feature.
Mode Select LLDP to have the Switch passively monitor current status of the connected PD by
reading LLDP packets from the PD on the port. The Switch also sends out LLDP packets to the
PD to update the Switch Neighbor table on the PD.
Select Ping to have the Switch ping the IP address of the connected PD to test whether the
PD is reachable or not.
Neighbor Name If Mode is set to LLDP, the system name of the connected PD displays automatically.
Neighbor IP If Mode is set to Ping and the PD supports LLDP, the connected PD’s IPv4 or IPv6 address to
which the Switch sends ping requests will display automatically. If not, enter the IP address
manually.
Test Click Test to have the Switch test the connection by sending a ping request to the IP address.
Polling Interval
(sec)
Specify the number of seconds the Switch waits for a response before sending another ping
request.
For example, the Switch will try to detect the PD status by performing ping requests every 20
seconds.
Polling Count Specify how many times the Switch is to resend a ping request before considering the PD
unreachable.
For example, If there is no ping reply from the PD after the Polling Interval (sec) has elapsed,
Polling Count starts from 1. After Polling Count reaches 3, the PD Health status LED will turn to
red in the MONITOR > Neighbor screen. The Switch will then perform your choice in the Action
field.
Action Set the action to take when the connected PD has stopped responding.
Select Reboot-Alarm to have the Switch turn OFF the power of the connected PD (the
connecting port is detected as link-down) and turn it back ON again to restart the PD after
sending an SNMP trap and generating a log message.
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.
Select Alarm to have the Switch send an SNMP trap and generate a log message.
Resume Polling
Interval (sec)
Specify the number of seconds the Switch waits before monitoring the PD status again after it
restarts the PD on the port.
PD Reboot Count Specify how many times the Switch attempts to restart the PD on the port.
The PD Reboot Count will reset
• as soon as a ping is successful,
• or when any modification to the Auto PD Recovery screen is applied,
• or after restarting the Switch.
Resume Power
Interval (sec)
Specify the number of seconds the Switch waits before supplying power to the connected PD
again after it restarts the PD on the port.
Apply Click Apply to save your changes to the Switch’s run-time memory. The Switch loses these
changes if it is turned off or loses power, so use the Save link on the top navigation panel to
save your changes to the non-volatile memory when you are done configuring.
Cancel Click this to reset the values in this screen to their last-saved values.
Table 103 PORT > Auto PD Recovery (continued)
LABEL DESCRIPTION
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