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Table 18: N+1 Power Redundancy Configurations for Different EX8208
Switch Configurations Using 3000 W AC Power Supplies
PowerSupplies
Neededfor N+1
PowerSupplies
Needed(N)Input Voltage
Switch
Configuration
21High-voltage line
(200–240 VAC)
Base
32High-voltage line
(200–240 VAC)
Fullyloaded with
8-port SFP+ line
cards
Table 19: N+1 Power Redundancy Configurations for Different EX8216
Switch Configurations Using 2000 W AC Power Supplies
PowerSupplies
Neededfor N+1
PowerSupplies
Needed(N)Input Voltage
Switch
Configuration
32High-voltage line
(200–240 VAC)
Base
32Low-voltageline
(100–120VAC)
65High-voltageline
(200–240 VAC)
Fullyloaded with
8-port SFP+ line
cards
Not supportedNot supportedLow-voltage line
(100–120VAC)
Table 20: N+1 Power Redundancy Configurations for Different EX8216
Switch Configurations Using 3000 W AC Power Supplies
PowerSupplies
Neededfor N+1
PowerSupplies
Needed(N)Input Voltage
Switch
Configuration
21High-voltage line
(200–240 VAC)
Base
54High-voltage line
(200–240 VAC)
Fullyloaded with
8-port SFP+ line
cards
N+N Redundancy Configuration of AC Power Supplies
You canoptionallyconfigureyourswitchfor N+N redundancy,in which N powersupplies
can be removed or fail and the remaining N powersupplies continue to supply powerfor
the switch without interruption. A common application for N+N redundancy is to have a
dual power feed for AC power supplies.
How many power supplies you require for N+N redundancy can depend on which Junos
OS Release your switch is running:
43Copyright©2010,Juniper Networks,Inc.
Chapter2:ComponentDescriptions