Dell C1048P Port Extender Networking Configuration Guide for the C9000 Series - Page 738
Detecting Legacy Devices and Allocating Power
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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 LLDPMED 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 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 Power over Ethernet (PoE) 738
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