Poe Redundant Power Configurations; Single 600-Ls Module Configuration: Redundant Poe Power; Dual 600-Ls Module Configuration: Full Power; Triple 600-Ls Module Configuration: Full Redundant Power - Extreme Networks Summit X450a-24tDC Hardware Installation Manual

PoE Redundant Power Configurations

You install one, two, or three EPS-600LS power modules in the EPS-C chassis (Model No. 10912) to
build an external redundant power system for the Summit switch. A redundant power cable shipped
with the EPS-C chassis provides the connection between the external power system and the redundant
power input connector on the back of the switch.
The PoE capability of the Summit X450e-48p or X250e-48p varies depending on the number of external
power modules in use. Table 12
X250e-48p switch based on the number of power modules in use.
Table 12: External Power Modules and Corresponding PoE Behavior
Internal PSU
Status EPS-600LS (1x)
Internal PSU: 370 W of
Power On redundant power
Internal PSU: 370 W of
Power Failure external power only

Single 600-LS Module Configuration: Redundant PoE Power

A single EPS-600LS power module provides redundant PoE power capability with the same 370-watt
capacity as the internal power supply. The internal Summit X450e-48p or X250e-48p power supply is
capable of 370 W of PoE power: 15.4 W supplied to each port for a 24-port configuration and 7.7 W
supplied to each port for a 48-port configuration.
If the internal power supply fails, the external power module will provide power to PoE devices at
●
the same power levels as the internal power supply without any power interruptions.
If the EPS-600LS power module fails or is removed, the internal power supply continues to provide
●
PoE power without any power interruptions.

Dual 600-LS Module Configuration: Full Power

Two EPS-600LS power modules provide full power at 740 W, which allows 15.4 W of PoE power to all
48 ports. In this full-power configuration, the internal power supply is disabled, and therefore
redundant power is not available.

Triple 600-LS Module Configuration: Full Redundant Power

Three EPS-600LS power modules provide the full 740 W of power for 15.4 W of PoE power to all 48
ports. In addition, this configuration provides 2:1 redundancy. Should one of the EPS-600LS power
modules fail, the third power module continues to provide uninterrupted full PoE power. The internal
power supply is disabled in this configuration.
Summit Family Switches Hardware Installation Guide
summarizes the PoE power behavior for the Summit X450e-48p or
EPS-600LS (2x)
740 W of
external power only
Internal PSU disabled
740 W of
external power only
EPS-600LS External Power Module
External PSU/Chassis
EPS-600LS (3x) Failed/Disconnected
740 W of 370 W of
external power only internal power only
with 2 + 1 redundancy
Internal PSU disabled
740 W of No PoE power
external power only
with 2 + 1 redundancy
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