Configuring Power over Ethernet Parameters Installing and Managing Power over Ethernet (PoE)
page 3-6 OmniSwitch 6850 Series Hardware Users Guide September 2009
Disabling PoE
To disable PoE on a particular slot or port, use the lanpower stop command.
To disable PoE on a specific PoE-capable port, enter a slot/port number. For example:
-> lanpower stop 8/22
To disable PoE for all PoE-capable in a slot, enter the corresponding slot number only.
For example:
-> lanpower stop 8
Configuring the Total Power Available to a Port
By default, each port is authorized by the system software to use up to a maximum amount of milliwatts to
power any attached device.
You can either increase or decrease this value based on the allowed ranges specified in Chapter 3, “Install-
ing and Managing Power over Ethernet (PoE).”
Increasing the total power available to an individual port may provide a more demanding Powered Device
(PD) with additional power required for operation. Decreasing the total power available to a port helps to
preserve inline power and assists in the overall management of the switch’s power budget.
To increase or decrease the total power available to an individual port, use the lanpower power command.
Since you are setting the power allowance for an individual port, you must specify a slot/port number in
the command line. For example, the syntax
-> lanpower 3/12 power 3000
reduces the power allowance on slot 3 port 12 to 3000 milliwatts. This new value is now the maximum
amount of power the port can use to power any attached device (until the value is modified by the user).
Configuring the Total Power Available to a Switch
Like the maximum port power allowance, the system software also provides a maximum slot-wide power
allowance. By default, each slot is authorized by the system software to use a number of watts to power all
devices connected to its ports depending on which power supply is used.
As with the maximum port power allowance, the user can either increase or decrease this value based on
the allowed ranges specified in Chapter 3, “Installing and Managing Power over Ethernet (PoE).”
Increasing the total power available to a slot may provide more demanding Powered Devices (PDs) with
additional power required for operation. Decreasing the total power available to a slot helps preserve inline
power and assists in the overall management of the switch’s power budget.
Important. Before changing the maximum slot-wide power allowance, you must disable PoE for the slot
via the lanpower stop command. Once the new value is assigned, re-enable PoE for the slot via the
lanpower start command.
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