Juniper Networks EX8208 manual +1 Redundancy Configuration of AC Power Supplies

Complete Hardware Guide for EX8208 Ethernet Switches

is 52 VDC. The output power is 1200 W for low-voltage line input and 2000 W for high-voltage line input.

The 3000 W AC power supply supports only the high-voltage line input (200–240 VAC) AC power configuration. Low-voltage line input is not supported for the 3000 W AC power supplies on the EX8200 switches. The output is 52 VDC. The output power is 3000 W for high-voltage line input.

N+1 Redundancy Configuration of AC Power Supplies

N+1 redundancy configuration is required for normal operation of EX8200 switches. In an N+1 redundancy configuration, if one power supply fails or is removed, the remaining power supplies continue to supply power for the switch without interruption.

Depending on the configuration type of the switch and the input voltage, determine the number of power supplies needed (N) for a switch. Install an additional power supply to meet the required N+1 redundancy configuration. For details about different switch configurations, see “EX8208 Switch Configurations” on page 6 or EX8216 Switch Configurations.

The tables in this section list the N+1 power requirements for different EX8200 switch configurations:

•Table 17 on page 42—Lists the N+1 power requirements of EX8208 switch configurations that use 2000 W AC power supplies.

•Table 18 on page 43—Lists the N+1 power requirements of EX8208 switch configurations that use 3000 W AC power supplies.

•Table 19 on page 43—Lists the N+1 power requirements of EX8216 switch configurations that use 2000 W AC power supplies.

•Table 20 on page 43—Lists the N+1 power requirements of EX8216 switch configurations that use 3000 W AC power supplies.

Table 17: N+1 Power Redundancy Configurations for Different EX8208

Switch Configurations Using 2000 W AC Power Supplies

Switch		Power Supplies	Power Supplies
Configuration	Input Voltage	Needed (N)	Needed for N+1
Base	High-voltage line	1	2
	(200–240 VAC)
	Low-voltage line	2	3
	(100–120 VAC)
Fully loaded with	High-voltage line	3	4
8-port SFP+ line	(200–240 VAC)
cards
	Low-voltage line	5	6
	(100–120 VAC)

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