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
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Power over Ethernet (PoE)