PoE/PoE+ Planning and Implementation Guide 2011-09

2-12
Operating Rules
Provisioning Power for PoE
Table 2-4. Maximum Power Allocations
PoE Power Requirements
The Switch 2610-24/12PWR has 24 ports of which 1-12 can be used for PoE
and its internal PoE power supply provides 126 watts across 12 ports. If a 600
RPS/EPS or a 610 EPS device is connected to the Switch 2610-24/12PWR for
the purpose of supplying external power to the PoE portion of the switch,
there will be either 408 watts or 204 watts of power available should the
switch’s internal PoE power supply fail. If a single switch is connected to the
EPS ports on the 600 RPS/EPS or a single port of a pair on the 610 EPS, 408
watts are available, providing fully redundant PoE power to the switch.
If two switch devices are connected to the EPS ports on the 600 RPS/EPS or
to both ports of a pair on the 610 EPS, only 204 watts are provided to the switch
if the internal PoE power supply fails. This will still provide enough wattage
to be a full PoE backup for the Switch 2610-24/12PWR because it only needs
126 watts.
The Switch 2610-24-PWR has 24 ports and its internal PoE power supply
provides 406 watts across all 24 ports. If a 600 RPS/EPS or a 610 EPS device
is connected to the Switch 2610-24-PWR for the purpose of supplying external
power to the PoE portion of the switch, there will be either 408 or 204 watts
of power available should the switch’s internal PoE power supply fail. If a
PoE Devices Internal Only Internal and EPS EPS Only
PoE for Switch
2610-24/12PWR
126 watts available to
ports 1-12
126 watts available to
ports 1-12 (provided by
the internal source). 408/
204* watts available,
provided by the EPS
source.
The internal power supply has
failed, and the EPS provides
408/204* watts to ports 1-12.
PoE for Switch
2610-24-PWR
406 watts available to
ports 1-24.
Redundant 408/204*
watts available to ports 1-
24. Only if the internal
power supply fails.
408/204* watts available to
ports 1-24. (The EPS provides
PoE power to ports 1-24 only if
the internal power supply
fails.)
PoE for Switch
2610-48-PWR
406 watts available to
ports 1-48.
406 watts available to
ports 1-24 (provided by
the internal source). 408/
204* watts available to
ports 25-48 (provided by
the EPS source).
The internal power supply has
failed, and the EPS provides
408/204* watts to ports 1-48.
Note that 22 watts of this
power is always allocated
exclusively to ports 1-24 or 25-
48.)
* If both EPS ports on the 600 RPS/EPS or both ports of a pair on the 610 EPS are connected to switches, each switch
can receive 204 watts of power. If a single switch is connected to the EPS ports, that switch can receive 408 watts.