Administrator Guide

3 Priority — Dell Networking OS uses priority for priority calculation.
4 PD requested power value — Dell Networking OS uses this value for power allocation.
5 PSE allocated power value — Dell Networking OS uses this value to check whether the PD is in sync with the PSE.
To enable the system or interface to advertise IEEE 802.3 power-via-mdi TLV to advertise its power negotiation capabilities with the
powered devices using LLDP, use the advertise dot3–tlv power—via—mdi command. You can congure this command either on
a specic interface or globally. This command provides advanced power management between LLDP-MED endpoints and network
connected devices. It allows an endpoint to communicate more precise required power requirements and enables the port extender to
allocate less power to the endpoint, while making more power available to other port extender ports.
By default, advertising extended power through dot3–TVLs is disabled.
NOTE: The port extender performs Layer 2 classication and participates in LLDP power negotiation only when in Class mode. To
use this feature, congure PoE in power management Class mode. For information about Class mode, see Enabling PoE/PoE+ on
a Port.
• Congure the system or an interface to advertise IEEE 802.3 power-via-mdi TLV to advertise its power negotiation capabilities with the
powered devices using LLDP.
LLDP CONFIGURATION or INTERFACE LLDP CONFIGURATION mode
advertise dot3-tlv power-via-mdi
Example of Advertising in LLDP Conguration Mode
The following example congures all the interfaces to advertise extended power though dot3–TLVs in conguration mode.
Dell(conf-lldp)#advertise dot3-tlv power-via-mdi
Example of Advertising in LLDP Interface Conguration Mode
The following example congures interface peGigE 0/0/1 to advertise extended power though dot3–TLVs.
Dell(conf)#interface peGigE 0/0/1
Dell(conf-if-pegi-0/0/1)#protocol lldp
Dell(conf-if-pegi-0/0/1-lldp)#advertise dot3-tlv power-via-mdi
Detecting Legacy Devices and Allocating Power
To enable detection of legacy devices and allocation of inline power to the devices on a port extender, use the power inline legacy
pe pe—id stack-unit unit-number command in Conguration mode. To disable detection of legacy devices, use the [no]
power inline legacy pe pe-id stack-unitunit-number command.
This command has the following parameters:
• pe pe-id — Specify the port extender ID. The range is from 0 to 255.
• stack-unit unit-number — Specify the stack unit number of the port extender. The range is from 0 to 7.
• Enable or disable detection and allocate inline power to legacy devices on a port extender.
CONFIGURATION
power inline legacy pe pe—id stack-unit unit-number
Example of Detecting and Allocating Power to Legacy Devices
The following example shows detecting and allocating power to legacy devices on the port extender.
Dell(conf)#power inline legacy pe 0 stack-unit 0
792
Power over Ethernet (PoE)