N+N Redundancy Configuration Of Ac Power Supplies; Table 30: N+0 Ac Power Calculations For 32-Port Ex4300 Switches; Table 31: N+0 Ac Power Calculations For 48-Port Ex4300 Switches - Juniper EX4300 Hardware Manual

Table 30: N+0 AC Power Calculations for 32-Port EX4300 Switches

Power Supply Rating
PSU PSU
0
350 W AC –
350 W AC 350 W AC

Table 31: N+0 AC Power Calculations for 48-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

N+N Redundancy Configuration of AC Power Supplies

Copyright © 2015, Juniper Networks, Inc.
Total Power (in
watts)
PSU (W) +
0
PSU (W)
1 1
350
700
Table 31 on page 51 lists the N+0 power calculation for 48-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
You can configure your switch for N+N redundancy, in which N power supplies can be
removed or fail and the remaining N power supplies continue to supply power to the
switch without interruption.
You can configure the power management software to manage switch power for N+N
redundancy. When you configure power management for N+N redundancy, half of the
total power available (N) is held as reserve power while the other half (N) is available
for immediate consumption. If the switch configuration changes and requires additional
power, then additional power is drawn from the reserve power, and the switch no longer
System Power
Budget (in
watts)
350
665
System Backup
Power Power Base
Budget (in (in Power (in
watts) watts) watts)
350 0 175
665 0 175
993.5 0 175
715 0 175
1358.5 0 175
1705 0 175
1100 0 175
2090 0 175
1340 0 175
Chapter 4: Power Supplies
Backup
Power (in Base Power
watts) (in watts)
0 164
0 164
Available Ports
PoE Power Enabled
(in watts) for PoE+
175 5
490 16
818.5 27
540 18
1183.5 39
1530 48
925 30
1915 48
1165 38
51