Power over Ethernet Tutorial
Installing and Managing Power over Ethernet (PoE)
page 3-32
OmniSwitch 7700/7800 Hardware Users Guide
April 2005
Power over Ethernet Tutorial
The following tutorial provides information—in a sample scenario—for the following PoE configuration
steps:
•
Activating power to two slots
•
Disconnecting power to a particular port in the slot
•
Allocating additional power to an individual device
•
Increasing a port’s overall priority level within the PoE configuration
•
Reducing the maximum overall power allocated to all ports in a slot
•
Verifying configuration changes and the overall PoE power budget
1
Begin by activating PoE on two separate slot. Note that each slot must be activated separately.
For example:
-> lanpower start 3
-> lanpower start 4
2
Disconnect power to one of the ports in slot 3. For this example, port 13:
-> lanpower stop 3/13
3
In this example, a new wireless LAN device is being added to port 3/12. The wireless LAN device
being added requires a minimum of 16000 milliwatts for operation. By default, OS7-ENI-P24 ports have a
power allowance of 15400 milliwatts. Therefore the power allowance for the port must be increased, as
shown:
-> lanpower 3/12 power 20000
Note
.
The surplus 20000 milliwatts specified (20000 versus 16000 as required by the PD) provides addi-
tional overhead in the event of a power spike on the new wireless LAN device.
4
Also, this new wireless LAN device will undergo critical testing within the network. Unexpected
downtime should be avoided at all costs. Therefore, the priority value for the corresponding port must be
increased to critical:
-> lanpower 3/12 priority critical
