Configuration - Juniper EX6210 Complete Hardware Manual

Table 53: Calculating the Number of Power Supplies Required for Your EX6210 Switch
Configuration (continued)
Step
7 Number of power supplies required for your
switch (N) = (Maximum Internal Power
Requirement of the Switch) / (Output
wattage of the Installed Power Supply)
NOTE: If the value of N is not a whole
number, round up the value of N to the next
whole number.
8 To achieve N+1 power redundancy, add a
single power supply to the value of N.
To achieve N+N power redundancy, add N
power supplies to the value of N.
Calculating System Thermal Output for Your EX6210 Switch Configuration
Copyright © 2014, Juniper Networks, Inc.
NOTE: We recommend that you maintain N +1 or N+N power supplies in your
switch at all times.
Power management raises a minor alarm if the number of online power
supplies in your switch is less than the number required to maintain the
configured power redundancy (N+1 or N+N ). If the problem is not corrected
in 5 minutes, power management raises a major alarm. See Understanding
Alarm Types and Severity Levels on EX Series Switches for details.
Power management raises a major alarm if the number of online power
supplies in your switch is less than N power supplies and normal operation
of the switch might be disrupted. For more information about how power
management allocates power to chassis components when power is
insufficient, see Understanding Power Management on EX Series Switches.
To calculate the system thermal output of an EX6210 switch, follow the instructions in
Table 54 on page 120.
Chapter 7: Planning Power Requirements
EX6210 switch
with two 48-port
EX6210 switch PoE+ line cards,
with two 48-port 2500 W AC power
RJ-45 line cards, supply
2100 W DC power (high-voltage line
supply input)
= (800 W) / (2100 = (3820 W) / (2500
W) W)
= 0.38 = 1.52
= 1 = 2
= 1 + 1 = 2 + 1
= 2 = 3
= 1 +1 = 2+ 2
= 2 = 4
EX6210 switch
with two 48-port
SFP line cards,
5000 W AC power
supply
(high-voltage line
input)
= (1000 W) /
(5000 W)
= 0.2
= 1
= 1 + 1
= 2
= 1 +1
= 2
119