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 X150 Series Hardware Installation Manual

PoE Redundant Power Configurations

The PoE capability of the Summit X450e-48p or X250e-48p varies depending on the number of external
power modules in use. Table 34
X250e-48p switch based on the number of power modules in use.
Table 34: 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; this power level 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. If one of the EPS-600LS power modules
fails, the third power module continues to provide uninterrupted full PoE power. The internal power
supply is disabled in this configuration.

Internal-to-External PSU Transfer

This section describes the conditions that would cause the Summit X450e-48p or X250e-48p switch to
draw power from the external power unit.
Internal PSU Failure with Single EPS-600LS Module.
connected to the Summit X450e-48p or X250e-48p switch and the internal PSU fails, power is drawn
from the EPS-600LS without power interruption to the PoE-connected devices.
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 (3x)
740 W of
external power only
with 2 + 1 redundancy
Internal PSU disabled
740 W of
external power only
with 2 + 1 redundancy
When an EPS-C with a single EPS-600LS is
External
PSU/Chassis
Failed/Disconnected
370 W of
internal power only
No PoE power
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