Configure Power Over Ethernet (PoE) to route electrical
power from your firewall to another network device.
The following task describes the procedure
for setting up PoE on your firewall.
Ensure that the device you want to provide power
to is connected to the firewall using an Ethernet cable through
a supported PoE port on the firewall.
Using a Cat5 or Cat6 Ethernet cable ensures the most
reliable power transfer. A Cat3 cable, for example, will only be
able to transfer as much as 20W.
Select NetworkInterfacesEthernet and choose
the interface you have cabled.
PoE is active on all PoE ports by default. On the Ethernet
Interface window, selecting Advanced and
viewing PoE Settings shows that PoE Enable is
already enabled.
You can also use the CLI to enable or disable PoE.
After logging in to the firewall using terminal emulation software,
enter configure followed by set network interface ethernet ethernet1/9 poe poe-enabled {yes | no} where “ethernet1/9”
corresponds to the PoE port you wish to enable or disable.
Before continuing to the next step, determine the
maximum amount of power that is supported by the connected powered
device (PD). This value is dependent on the type and class of the
PD.
Set the amount of power reserved by the port by entering
a value (in Watts) for PoE Rsvd Pwr. This
value must be a number between 0 and the
Maximum Reserved Power of the port as defined in the PoE Overview. A 0 indicates that
no power is reserved by that PoE port.
You can also use the CLI to configure PoE reserved
power. Enter configure followed by set network interface ethernet1/9 poe poe-rsvd-pwer <value> where “ethernet1/9”
corresponds to the PoE port you wish to configure and “<value>” refers
to the number of Watts ranging from 0 to the maximum supported by
the interface.
The total PoE
Rsvd Pwr of all of your PoE ports should not exceed
the Total PoE Budget Allowed. If you go over the Total PoE Budget
Allowed, one or more powered devices will enter the Den (Power
Denied) state until you reallocate the reserved power.
A PoE port can also enter Den or Dis (Disabled)
state based on the current Total Allocated Power. Total Allocated
Power refers to the sum of all PoE ports' Reserved Power or to the
sum of Actual Allocated Power permitted by all PDs. If the total Reserved
Power is less than the total Actual Allocated Power, the PoE port
enters the Dis or Den state.
A PoE port in the Dis or Den state
cannot be resolved by disconnecting and reconnecting the PD. Instead,
use one of the following methods to resume sensing power on the
connected PD:
Disable PoE on the interface by unchecking PoE Enable.
Apply the setting and then go back to the same interface and check PoE
Enable.
Set the affected port link state to auto or up.
Change the PoE Rsvd Pwr of the affected
PoE port to equal or greater than the PD's power requirement.
If no device is connected to a PoE port,
ensure that either PoE Enable is unchecked
or the PoE Rsvd Pwr value is 0 to
avoid consuming a portion of the PoE budget.
Click OK.
Commit your changes.
Verify the status of the PoE ports by either checking
the firewall web interface or the CLI.
To verify by the firewall web interface,
log in to the firewall and select DashboardWidgetsSystemInterfaces.
Hover the mouse over the PoE port icons, identified by a lightning
bolt symbol, for specific interface details. Select DashboardWidgetsSystemPoE Power Budget for
power allocation information. To view status messages and other
PoE information, select NetworkInterfacesPoE.
To verify using the CLI, enter show poe or show poe detail.
