Administrator Guide

Table 73. Power Budgeting for the PE (continued)
PoE or PoE+
Power Budget
Limit
Model Name Maximum PSU
Output Ability
(1 PSU)
Maximum
PSUs Output
Ability (2
PSUs)
System Power
Consumed
Redundancy
Power
Consumed
Threshold Max In-line
Power
Available
by default.
Supports up to
two 1100 W
PSUs.
N3048P 1100 W FRU
power supplies
by default.
Supports up to
two 1100 W
PSUs.
Upto 2200 W 150 W 150 W 99% 1881 W
The following table shows the maximum number of ports that you can configure for PoE and PoE+ based on the number of
PSUs available on the C1048P.
NOTE: The table assumes maximum of 30 W for PoE+ and 15.4 W for PoE.
Table 74. Maximum Number of PoE and PoE+ Ports
Model Name Number of PSUs Maximum number of PoE+
Ports
Maximum Number of PoE
Ports
C1048P 1 28 48
C1048P 2 48 48
N2024P 1 24 24
N2024P 2 24 24
N2048P 1 48 28
N2048P 2 48 48
N3048P 1 48 31
N3048P 2 48 48
N3024P (1100 W) 1 24 24
N3024P (1100 W) 2 24 24
N3024P (715 W) 1 24 18
N3024P (715 W) 2 24 24
Enabling PoE or PoE+ on more ports than the power budget supports produces one of the following results:
● If the newly PoE or PoE+ -enabled port has a lower priority, the command is accepted but power is not allocated to the port.
In this case, the following message displays: %Warning: Insufficient power to enable. POE oper-status
set to OFF for port.
● If the newly PoE or PoE+ -enabled port has a higher priority, the command is accepted and power is terminated on the
lowest priority port in the power extender. If you add another PSU to the system later, both ports receive power.
● If all the lower priority ports combined cannot meet the power requirements of the newly enabled port, the command is
accepted but power on the lower priority ports is not terminated and power is not supplied to the port. The second result is
true even if a powered device is not connected to the port. You can allocate power to a port, thus subtracting it from the
power budget and making it unavailable to other ports, but that power is not consumed.
Power over Ethernet (PoE)
769