Dell C1048P Port Extender Networking Configuration Guide for the C9000 Series - Page 819

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 Deploying Voice Over IP (VoIP) For a complete list of all PoE commands, see the Dell Networking OS Command Line Reference Guide. Current VoIP phones follow the same basic boot and operations process: 1. Wait for an LLDP from the Ethernet switch. 2. Obtain an IP address from a dynamic host configuration protocol (DHCP) server. 3. Send an LLDP-MED frame to the switch. 4. Wait for an LLDP-MED frame from the switch and read the Network Policy TLV to get the VLAN ID, Layer 2 priority, and DSCP value. 5. Download applications and software from the call manager. 6. After the configuration completes, send voice packets as tagged frames and data packets as untagged frames. The following shows a basic configuration for a deployment in which the end workstation plugs into an IP phone for its Ethernet connection. Figure 108. PoE VoIP Power over Ethernet (PoE) 819