Troubleshooting; Existing Pd Loses Power When New Pd Connected; Newly Connected Powered Device Not Receiving Power - Symbol ES3000 Manual

4-6 ES3000 Advanced Concept Guide
• Use priority-based power management.
• Either set the priority of currently unused ports to low and set the power budget for these
ports to 16.5 watts.
Under this policy, low-priority ports will be available as unmanaged powered ports. If there comes a
time when there is insufficient power to supply all ports, the high-priority, managed, ports will receive
power and some or all of the low-priority ports will not. If a powered device, either high or low priority,
malfunctions and draws more than its power limit, the power to that port will be shut down until the
power draw is beneath the established limit.

4.2.5 Troubleshooting

4.2.5.1 Existing PD loses power when new PD connected.

If power on an existing port shuts down when a new powered device is connected, the switch is
probably using a priority-based system for determining which ports receive power. If the switch has
exceeded its power budget, and if the new powered device has a higher priority than the existing
device, the switch shuts down the existing device.

4.2.5.2 Newly connected powered device not receiving power.

Several situations can cause a newly connected powered device to not receive power from the
switch:
• Power is disabled for the port. Check on the PoE port configuration page, and ensure that
the port for this device is Up.
• The switch has exceeded its power budget, and "Deny next port connection" is in effect on
the PoE Global Configuration page.
• If the powered device is an older device, it might not be detected as requiring power unless
"Capacitor Detection Enabled" is set on the PoE Global Configuration page.