Configuring for Network Management Applications

LLDP (Link-Layer Discovery Protocol)

PoE Advertisements. These advertisements inform an LLDP-MED endpoint of the power (PoE) configuration on switch ports. Similar advertisements from an LLDP-MED endpoint inform the switch of the endpoint’s power needs and provide information that can be used to identify power priority mismatches.

Power-over-Ethernet TLVs include the following power data:

■power type: indicates whether the device is a power-sourcing entity (PSE) or a powered device (PD). A MED-capable VoIP telephone is a PD.

■power source: indicates the source of power in use by the device. Power sources for powered devices (PDs) include PSE, local (internal), and PSE/ local. The switches covered in this guide advertise Unknown.

■power priority: indicates the power priority configured on the switch (PSE) port or the power priority configured on the MED-capable end­ point.

■power value: indicates the total power in watts that a switch port (PSE) can deliver at a particular time, or the total power in watts that the MED endpoint (PD) requires to operate.

To display the current power data for an LLDP-MED device connected to a port, use the following command:

show lldp info remote-device < port-list >

For more on this command, refer to page 13-70.

To display the current PoE configuration on the switch, use the following commands:

show power brief < port-list >show power < port-list >

For more on PoE configuration and operation, refer to Chapter 11, “Power Over Ethernet (PoE) Operation”.

Configuring Location Data for LLDP-MED Devices

You can configure a switch port to advertise location data for the switch itself, the physical wall-jack location of the endpoint (recommended), or the location of a DHCP server supporting the switch and/or endpoint. You also have the option of configuring these different address types:

■civic address: physical address data such as city, street number, and building information

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