configure lldp ports vendor-specific dot3 power-via-mdi

configure lldp ports [all | port_list] [advertise | no-advertise] vendor-specific dot3 power-via-mdi {with-classification}


Configures the LLDP port to advertise or not advertise Power over Ethernet (PoE) capabilities to its neighbors.

Syntax Description

all Specifies all ports on the switch.
port_list Specifies one or more ports or slots and ports.
advertise Specifies to send the information to neighbors.
no-advertise Specifies not to send the information to neighbors.
with-classification Specifies to use LLDP for Data Link Layer Classification.

This option is available only on PoE+ ports.


No advertise.

Usage Guidelines

When configured, the system includes this TLV. We recommend enabling this TLV only on PoE-capable ports.

The following information is transmitted for LLDP ports with this TLV:
  • Support PoE or not

  • Port class
    • Power sourcing equipment (PSE)

    • Powered device (PD)

  • Power pairs used to supply power
    • Signal

    • Spare

  • Power status

  • Support pairs control or not

  • Power class
    • Class0

    • Class1

    • Class2

    • Class2

    • Class3

    • Class4

Data link layer classification allows fine-grained dynamic re-allocation of power based on changing needs. This feature is enabled by enabling LLDP (transmit and receive) and configuring transmission of the power-via-MDI TLV. The ExtremeXOS software sends an LLDPDU containing a power-via-MDI TLV within 10 seconds of DLL classification being enabled. A PD may request a new power value using an LLDPDU. The allocated power might be changed if a request is received and approved after a power review. The software responds with an allocated power value within 10 seconds of receipt of an LLDPDU with a different requested power from a PD. Power allocation can be controlled to a granularity of 0.1 watts. When DLL classification is enabled, it takes precedence over physical classification.



For more information on advertising power support, see the configure lldp ports vendor-specific med power-via-mdi command.


The following command configures all ports to advertise power capabilities to neighbors:

configure lldp ports all advertise vendor-specific dot3 power-via-mdi


This command was first available in ExtremeXOS 11.2.

Platform Availability

This command is available on ExtremeSwitching X435, X440-G2, X450-G2, X460-G2, X465, X590, X620, X670-G2, X690, X695, X870, 5320, 5420, and 5520 series switches.