Configuring Power over Ethernet Parameters
Managing Power over Ethernet (PoE)
page 5-6
OmniSwitch 6850/6850E Series Hardware Users Guide
June 2011
Setting the PoE Operational Status
Enabling PoE
By default, Power over Ethernet is
administratively
enabled
in the switch’s system software. However, in
order to physically activate PoE, you must issue the
lanpower start
command on a slot-by-slot basis
before any connected PDs will receive inline power.
To activate power to
PoE-capable in a switch, enter the corresponding slot number only. For example:
-> lanpower start 3
If power to a particular port has been disconnected via the
lanpower stop
command, you can reactivate
power to the port by specifying both the
slot
and
port
in the command line. For example:
-> lanpower start 3/11
Note.
You cannot use the
slot/port
syntax to initially activate PoE on a port. This syntax is intended only
to reactivate power to those that have been disconnected via the
lanpower stop
command. To initially
activate PoE, you must use the
lanpower start
slot
syntax only, as described above.
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 5,
“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).
