Power allotment adjustment in a power sourcing equipment (pse) of a power over ethernet system based on event detection at another pse

A method for Power over Ethernet (POE) management comprising:

• exchanging, by a Power Source Equipment (PSE), a first set of transport layer protocol communications with an additional PSE, the PSE and the additional PSE being configured to provide PoE to a Powered Device (PD), the first set of transport layer protocol communications comprising:
• a first communication from the PSE to the additional PSE comprising a first PoE configuration field indicative of a PoE configuration of the PSE;
• and
• a second communication from the additional PSE to the PSE comprising a second PoE configuration field indicative of a PoE configuration of the additional PSE;
• creating a power availability table for the PD based on information from the first PoE configuration field and the second PoE configuration field, wherein the power availability table is indicative of availability of PoE for the PD from the PSE and the additional PSE;
• detecting occurrence of an event comprising at least one of a change in the power availability table or a change in ability of the PSE to provide power to the PD;
• and
• sending, based at least in part on occurrence of the event, a second set of transport layer protocol communications to the additional PSE, the second set of transport layer protocol communications comprising a request to the additional PSE to adjust a power allotment of the additional PSE for the PD.

A powered device (PD) comprising:

• a control circuitry;
• a first uplink port;
• a second uplink port;
• and
• control circuitry configured to, in a state of the first uplink port being connected to a first Power Sourcing Equipment (PSE) and the second uplink port being connected to a second PSE:
• receive power from the first PSE via an Ethernet cable that is plugged into the first uplink port;
• receive power from the second PSE via another Ethernet cable that is plugged into the second uplink port;
• receive a first link layer protocol communication from the first PSE, in response to occurrence of an event comprising at least one of a change in a power availability table of the PD or a change in ability of the PSE to provide power to the PD, wherein the first link layer protocol communication is indicative of a request to adjust PD power draw, wherein the power availability table is indicative of availability of PoE for the PD based on PoE configuration of the first PSE and PoE configuration of the second PSE;
• adjust, based on the first link layer protocol communication, the PD power draw;
• and
• send a second link layer protocol communication to one of the PSE or the second PSE to draw power based on the adjusted PD power draw.