Users Guide

Power Management Mode: Static
Interface Inline Power Inline Power Class Device PoE Port LLDP
Max / Alloc Consumed Type Priority Support
(Watts) (Watts)
----------------------- ------------ ------- ------ -------- ------
PeGi 0/0/0 30.00/0.00 0.00 NO_PD - critical 0
Monitor the Power Budget
The power budget is the amount of power available from the installed PSUs minus the power required to operate the port
extender.
To help determine if power is available for additional PoE or PoE+ ports, use the show power inline and show power
detail commands. For information about these commands, see Displaying PoE Power Allocation.
The C1048P PE has one 1000 W fixed PSU and one external power supply with a capacity of 1000 W. The power required for
system components is 150 W. The power available for PoE or PoE+ is calculated after excluding the power needed for system
components and power redundancy.
The following table defines the power budgeting for PE. In this table, 150 W from the fixed PSU and EPS are reserved for system
power and redundancy. The remaining 850 W from each PSU is allotted for PoE or PoE+.
Table 67. Power Budgeting for the PE
PoE or PoE+
Power Budge Limit
Model Name System Power
Maximum
Dissipation
One PSU Support One PSU Support Two PSUs Support Two PSUs Support
C1048P 110 W
Maximum PSU
Output Ability
1000 W
PoE+ power turn
on limitation
Power budget is
850 W: The total
PoE supply power
available is 850 W.
Maximum PSUs
output ability
2000 W
PoE power turn on
limitation
Power budget is
1700 W
All PoE+ ports can
be turned on.
The following table shows the maximum number of ports that you can configure for PoE and PoE+ based on the number of
PSUs available.
NOTE: The table assumes maximum of 30 W for PoE+ and 15.4 W for PoE.
Table 68. Maximum Number of PoE and PoE+ Ports
Number of PSUs Maximum number of PoE+ Ports Maximum Number of PoE Ports
1 28 48
2 48 48
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.
Power over Ethernet (PoE) 745