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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 113. PoE VoIP
Creating VLANs for an Office VoIP Deployment
The phone in the previous figure requires one tagged VLAN for VoIP service and one untagged VLAN for PC
data, as shown in the following example.
You can configure voice signaling on the voice VLAN but some implementations may need an extra tagged
VLAN for this traffic.
Example of Adding an Extra Tagged VLAN for Voice Signaling
Dell#show running-config interface configured
!
interface PeGigGE 0/6/1
no ip address
no shutdown
!
Power over Ethernet (PoE)
883
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Troubleshooting
