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PoE-Out can be configured under the menu. Each port can be controlled independently.


PropertyDescription
name ()Name of an interface
poe-out (auto-on | forced-on | off; Default: auto-on)Specifies PoE-Out state
  • auto-on - the board will attempt to detect if power can be applied to the port. For powering there should be resistance in the range from 3kΩ to 26.5kΩ
  • forced-on - detection range is removed. As a result power over Ethernet will be always on
  • off - all detection and power is turned off for this port
poe-priority (integer:0..99 | any; Default: 10)poe-priority specifies the importance of PoE-Out ports, in cases when a total PoE-Out limit is reached, interface with the lowest port priority will be powered off first.

Highest priority is 0, the lowest priority is 99. If there are 2 or more ports with the same priority then port with the smallest port number will have a higher priority. For example, if ether2 and ether3 have the same priority and over-current is detected then PoE-Out on ether3 will be turned off.

Every 6 seconds ports will be checked for a possibility to provide PoE-Out if it was turned off due to port priority.
poe-voltage (auto | low | high; Default: auto)

A feature that allows us to manually switch between two voltage outputs on PoE-Out ports. It will take effect only on PSE with switchable voltage modes (CRS112-8P-4S-IN, CRS328-24P-4S+RM, netPower 16P, CRS354-48P-4S+2Q+RM).

poe-lldp-enabled ( yes / no; Default: no)

Link Layer Discovery Protocol (LLDP) is a layer-2 Ethernet protocol for managing devices. LLDP allows an exchange of information between a PSE and a PD. 

Starting from RouterOS version 7.15, the setting has been replaced with the Neighbor Discovery lldp-poe-power property.


Info

Note: Enabling poe-lldp in RouterOS 7.8 can potentially solve issues encountered in VoIP setups.

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Info

Note: If poe-voltage=auto and poe-out is set to "forced-on", LOW voltage will be used by default. If the PD supports only high voltage, make sure you also set poe-voltage=high when forcing the PoE output.

 

Power-cycle settings

RouterOS provides a possibility to monitor PD using a ping, and power-cycle a PoE-Out port when the host does not respond. power-cycle-ping feature can be enabled under /interface ethernet poe menu.

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PropertyDescription
name ()Name of an interface
poe-out ()Shows PoE-Out settings
poe-out-status ()Shows current PoE-Out status on port
  • powered-on - Power is applied to the port, and PoE-Out is operating normally,
  • waiting-for-load - PSE attempts to detect if power can be applied to the port. For powering there should be resistance in the range from 3kΩ to 26.5kΩ;
  • short-circuit - Short-circuit is detected on PoE-Out port, power is switched off, the only detection with low voltage takes place.
  • overload - The PoE-Out current limit is exceeded, power is switched off on PoE-Out port. For port limits see each model specifications.
  • voltage-too-low - PD can not be powered with the voltage provided from PSE.
  • voltage_too_high - PSE controller cannot power PD with high voltage;
  • current-too-low - current-too-low means that PD draws too low current  (<10mA) than normal PoE-Out device should, the reason for this can be:

The delivered voltage at PD is too low for normal powering (for example Vmin =>30V, but provided 24V);

PD uses a second power source which has a higher voltage than PSE, so all current is taken from the second DC source, not PSE PoE-Out port;

  • off - all detection and power is turned off for this port;
  • power_reset - PSE controller resetting the power, for example, when executing the power cycle command or when pings fail (power-cycle-ping);
  • controller_init - PSE controller initialization;
  • controller_upgrade - PSE controller is being upgraded;
  • controller_error - PSE controller does not respond.
poe-out-voltage ()Displays PoE Voltage which is applied to the PD.
poe-out-current ()Displays port current (mA) which is drawn by the PD.
poe-out-power ()Displays PD power consumption

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