N+N Redundancy Configuration Of Ac Power Supplies - Juniper EX8208 Hardware Manual

Table 18: N+1 Power Redundancy Configurations for Different EX8208 Switch Configurations Using
3000 W AC Power Supplies
Switch Configuration
Base
Fully loaded with 8-port
SFP+ line cards
Table 19: N+1 Power Redundancy Configurations for Different EX8216 Switch Configurations Using
2000 W AC Power Supplies
Switch Configuration
Base
Fully loaded with 8-port
SFP+ line cards
Table 20: N+1 Power Redundancy Configurations for Different EX8216 Switch Configurations Using
3000 W AC Power Supplies
Switch Configuration
Base
Fully loaded with 8-port
SFP+ line cards

N+N Redundancy Configuration of AC Power Supplies

You can optionally configure your switch for N+N redundancy, in which N power supplies can be removed
or can fail and the remaining N power supplies continue to supply power to the switch without interruption.
A common application for N+N redundancy is to have a dual power feed for AC power supplies.
Input Voltage
High-voltage line (200–240 VAC)
High-voltage line (200–240 VAC)
Input Voltage
High-voltage line (200–240 VAC)
Low-voltage line (100–120 VAC)
High-voltage line (200–240 VAC)
Low-voltage line (100–120 VAC)
Input Voltage
High-voltage line (200–240 VAC)
High-voltage line (200–240 VAC)
Power Supplies
Needed (N)
1
2
Power Supplies
Power Supplies Needed for N+1
Needed (N) Redundancy
2 3
2 3
5 6
Not supported Not supported
Power Supplies
Power Supplies Needed for N+1
Needed (N) Redundancy
1 2
4 5
Power Supplies
Needed for N+1
Redundancy
2
3
60