Users Guide

Advertising Extended Power Though dot3–TLVs
The power device sends the following information in the IEEE 802.3 power-via-mdi TLV.
1 Power Class — Dell Networking OS honors and displays the power class in the show power inline command in EXEC mode
(the PD-requested power value must be within the class max watts limit).
2 Type — Dell Networking OS uses type only when the type is Type1 or Type2 PD and displays the type in the show power
inline
command in EXEC mode. The Dell Networking OS does not use Type1 or Type2 PSE requests.
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 configure this command either on
a specific 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 classification and participates in LLDP power negotiation only when in Class mode.
To use this feature, configure PoE in power management Class mode. For information about Class mode, see Enabling PoE/PoE
+ on a Port.
• Configure 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 Configuration Mode
The following example configures all the interfaces to advertise extended power though dot3–TLVs in configuration mode.
Dell(conf-lldp)#advertise dot3-tlv power-via-mdi
Example of Advertising in LLDP Interface Configuration Mode
The following example configures 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 Configuration 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
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Power over Ethernet (PoE)