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Dell Configuration Guide for the S4048–ON System 9.14.2.6

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Extended Power via MDI TLV

The extended power via MDI TLV enables advanced PoE management between LLDP-MED endpoints and network connectivity devices.

Advertise the extended power via MDI on all ports that are connected to an 802.3af powered, LLDP-MED endpoint device.
  • Power Type — there are two possible power types: power source entity (PSE) or power device (PD). The Dell EMC Networking system is a PSE, which corresponds to a value of 0, based on the TIA-1057 specification.
  • Power Source — there are two possible power sources: primary and backup. The Dell EMC Networking system is a primary power source, which corresponds to a value of 1, based on the TIA-1057 specification.
  • Power Priority — there are three possible priorities: Low, High, and Critical. On Dell EMC Networking systems, the default power priority is High, which corresponds to a value of 2 based on the TIA-1057 specification. You can configure a different power priority through the CLI. Dell EMC Networking also honors the power priority value the powered device sends; however, the CLI configuration takes precedence.
  • Power Value — Dell EMC Networking advertises the maximum amount of power that can be supplied on the port. By default the power is 15.4W, which corresponds to a power value of 130, based on the TIA-1057 specification. You can advertise a different power value using the max-milliwatts option with the power inline auto | static command. Dell EMC Networking also honors the power value (power requirement) the powered device sends when the port is configured for power inline auto.
Figure 1. Extended Power via MDI TLV
Illustration of the extended power via MDI TLV feature.

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