Installing and Managing Power over Ethernet (PoE)
Power over Ethernet Tutorial
OmniSwitch 7700/7800 Hardware Users Guide
April 2005
page 3-33
5
Verify all changes made to port 3/12:
-> show lanpower 3
Port Maximum(mW) Actual Used(mW) Status Priority On/Off
----+-----------+---------------+--------------------+---------+------
1 15400
3000 Powered On Low ON
2 15400
3000 Powered On Low ON
3 15400
3000 Powered On Low ON
4 15400
3000 Powered On Low ON
5 15400
3000 Powered On Low ON
6 15400
3000 Powered On Low ON
7 15400
3000 Powered On Low ON
8 15400
3000 Powered On Low ON
9 15400
3000 Powered On Low ON
10 15400
3000 Powered On Low ON
11 15400
3000 Powered On Low ON
12
20000 3000 Powered On Critical ON
13 15400
3000 Powered Off Low ON
(Additional output not shown)
Note that the operational status for port 3/12 is
on
. Also, the maximum power allowance has been
increased to
20000
, and the port priority status is
critical
. Port 3/12 is now ready for the new wireless
LAN device to be added.
6
To further manage the power budget on the switch, the user can reduce the maximum power allow-
ance on another OS7-ENI-P24 installed in the chassis (in this case, the module installed in slot 4).
The default value for a PoE-capable slot is 210 watts. For this example, the maximum power allow-
ance will be reduced to 70 watts in order to conserve the PoE power budget:
-> lanpower 4 maxpower 70
7
Verify the changes made to slot 4:
-> show lanpower 4
(Initial output not shown)
Slot 4 Max Watts 70
364 Watts Total Power Budget Remaining
514 Watts Total Power Budget Available
1 Power Shelf Power Supplies Available
Note that the maximum power allowance for slot 4 is 70 watts, as specified at step 5. By reducing the
power allowance for all ports in this slot, PoE power is conserved. A high-use PoE slot (e.g., slot 3)
will have an increased power budget from which to draw necessary power for incoming PDs.
