Load Sharing Power Supplies - Extreme Networks Summit 300-24 Hardware Installation Manual

Summit 300 "e" Series Switches
Ports 1 through 48 are 10/100 ports with RJ45 connectors.
Full-Duplex. The Summit 300-48 switch provides full-duplex support for all ports. Full-duplex allows
frames to be transmitted and received simultaneously and, in effect, doubles the bandwidth available on
a link. All 10/100 Mbps ports on the Summit 300-48 switch autonegotiate for half- or full-duplex
operation.

Load Sharing Power Supplies

The PoE subsystem in the Summit 300-48 supports dual power supplies for either redundant or
load-sharing modes. Redundant mode is the default and provides hitless PoE should one of the two
power supplies fail, be removed, or powered off. Load-sharing mode allows both power supplies to
provide power to the PoE system, providing greater PoE power capacity. For load-sharing operation,
the amount of power provided to the PoE system is the sum of the power supplied by the power
supplies.
NOTE
With load-sharing, all PoE devices may experience a power hit if a power supply fails.
The Summit 300-48 switch is shipped with either one or two installed 600 W AC internal power supply
units (PSUs). For technical specifications of the power supplies, see "Summit 300-48 internal power
supply electrical specifications" on page 324.
To determine the wattage of the installed PSUs when the PSUs are in redundant mode, use the
show
command. If field indicates 480 W, that
inline-power System maximum internal inline-power
means that 600 W PSUs are installed.
Power Supply LEDs
The Summit 300-48 power supply has three LEDs that are visible from the rear of the Summit 300-48
when the supply is installed, as shown in Figure 25. The IN LED indicates the condition of the input
power (AC power source). When the input power is satisfactory, the IN LED is green, otherwise it is off.
The TEMP LED indicates the condition of the cooling fan or operating temperature. When the operating
temperature and fan cooling is satisfactory the TEMP LED is off, otherwise it is amber. The OUT LED
indicates the condition of the output DC power supplied by the power supply to the switch. When the
output power is satisfactory the OUT LED is green, otherwise it is off.
Extreme Networks Consolidated "i" and "e" Series Hardware Installation Guide 73