Extreme Networks 17001 manual Summit X250e-48p Power Supplies, Internal Power Supply, Power on

Summit X250e-48p Power Supplies

The Summit X250e-48p switch is powered by both an internal power supply and an optional external redundant power supply system.

Internal Power Supply

The internal Summit X250e-48p internal power supply can provide 370 W of PoE power, as follows:

●In a 24-port configuration, it provides 15.4 W to each port

●In a 48-port configuration or any combination of ports where total PoE power does not exceed 370 watts, it provides 7.7 W to each port.

If the total system demands exceed this power limit, you can specify one of the following:

●Port priorities to identify which ports should be ranked higher when allocating power

●Port disconnect precedence to specify the method of shutting off ports when not enough PoE power is available

NOTE

For a detailed discussion of these concepts, see the Power over Ethernet section in the ExtremeXOS Concepts Guide.

External Power Supplies

The EPS-600LS External Power Module provides optional redundant power for the Summit X250e-48p switch. Through the redundant power input connector on the rear panel, the switch can be powered by one, two, or three external power modules installed in the EPS-C External Power Supply Chassis.

The PoE capability of the Summit X250e-48p varies depending on the number of external power modules in use. Table 8 summarizes the PoE power behavior for the Summit X250e-48p switch based on the number of power supply modules in use.

Table 8: Number of External Power Modules and Corresponding PoE Behavior

Internal Power				External PSU/Chassis
Supply Status	EPS-600LS (1x)	EPS-600LS (2x)	EPS-600LS (3x)	Failed/Disconnected
Internal power	370 W of	740 W of	740 W of	370 W of
supply:	redundant power	external power only	external power only	internal power only
Power on			with 2:1 redundancy
		Internal power supply	Internal power supply
		disabled	disabled
Internal power	370 W of	740 W of	740 W of	No PoE power
supply:	external power only	external power only	external power only
Power Failure			with 2:1 redundancy

For specifications and installation instructions for the external power module, see “EPS-600LS External Power Module” on page 77.

Summit Family Switches Hardware Installation Guide 33