N+0 Redundancy Configuration Of Ac Power Supplies; Table 29: N+0 Ac Power Calculations For 24-Port Ex4300 Switches - Juniper EX4300 Hardware Manual

EX4300 Switch Hardware Guide

N+0 Redundancy Configuration of AC Power Supplies

Table 29: N+0 AC Power Calculations for 24-Port EX4300 Switches

Power Supply Rating
PSU PSU
0 1
350 W AC –
350 W AC 350 W AC
350 W AC 715 W AC
715 W AC –
715 W AC 715 W AC
715 W AC 1100 W AC
1100 W AC –
1100 W AC 1100 W AC
1100 W AC 350 W AC
52
In an N+0 redundancy configuration, lower priority PoE ports may be impacted if a power
supply fails.
Depending on the power supplies installed in the switch, you can determine the system
power budget.
If one power supply is installed in the switch:
System power budget = Output wattage of the installed power supply (PSU(W))
If two power supplies are installed in the switch:
System power budget = (Sum of the output wattages of the two power supplies) –
(10% of the output wattage of the power supply that has the higher output wattage)
System power budget = PSU
Table 29 on page 52 lists the N+0 power calculation for 24-port EX4300 switches that
use 350 W AC, 715 W AC, and 1100 W AC power supplies.
Total Power
(in watts)
PSU (W) +
0
PSU (W)
1
350
700
1065
715
1430
1815
1100
2200
1450
Table 30 on page 53 lists the N+0 power calculation for 32-port EX4300 switches that
use the 350 W AC power supply.
(W) + PSU (W) – (0.10 x MAX (PSU
0 1
System Backup
Power Power Base
Budget (in (in Power (in
watts) watts) watts)
350 0 150
665 0 150
993.5 0 150
715 0 150
1358.5 0 150
1705 0 150
1100 0 150
2090 0 150
1340 0 150
(W), PSU (W))
0 1
Available Ports
PoE Power Enabled
(in watts) for PoE+
200 6
515 17
720 24
565 18
720 24
720 24
720 24
720 24
720 24
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