When operating PoE-powered LANCOM access points at PoE switches from other manufacturers (e.g. HP, Extreme Networks), the switches occasionally do not recognize the PoE power required by the access points, which then have to operate with reduced power. For example, 802.3at-enabled LANCOM access points (e.g. L-1302acn, L-1310acn) operate with the PoE class 802.3af instead of using 802.3at (PoE+).

    An overview of PoE classes is available in the following Knowledge Base document Dokumentlinksymbol .

The reason for this behavior is that the switches from some manufacturers by default perform a consumption-based LLDP negotiation of the PoE class, whereas LANCOM access points only support a class-based LLDP negotiation.

Carry out the following to ensure that the correct PoE class is negotiated and the LANCOM access point receives maximum power from the PoE switch:
  • If the PoE switch supports LLDP class-based negotiation, you should enable this in the switch configuration.
  • If the PoE switch does not support LLDP class-based negotiation, you have to disable the LLDP function in the configurations of the LANCOM access point and the PoE switch. This means that the power supply is negotiated at the hardware level and depends on the PoE class.