Table 30: N+1 Power Redundancy Configurations For Different Ex6210 Switch Configurations Using 2100 W Dc Power Supplies - Juniper EX6210 Complete Hardware Manual

Copyright © 2014, Juniper Networks, Inc.
The configuration type of the switch, number of ports enabled for PoE, and the input
voltage determine the minimum number of power supplies needed (N) for a switch. You
must install an additional power supply to meet the recommended N+1 power redundancy
configuration. See "EX6210 Switch Configurations" on page 7
EX6200 switch configurations.
Table 30 on page 51 lists the N+1 power requirements of an EX6210 switch configuration
that use 2100 W DC power supplies.
Table 30: N+1 Power Redundancy Configurations for Different EX6210
Switch Configurations Using 2100 W DC Power Supplies
Switch Nominal Input
Configuration Voltage
96-port RJ-45 –48 VDC through
system –60 VDC
configuration
96-port PoE+ –48 VDC through
system –60 VDC
configuration
Fully loaded –48 VDC through
with two SFP –60 VDC
line cards
Fully loaded –48 VDC through
with eight –60 VDC
PoE+ line
cards
You can optionally 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 for
the switch without interruption.
You can configure the power management software to manage the 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 remaining half (N)
is available for immediate consumption. If the switch configuration changes (addition
of one or more line cards, or additional PoE ports enabled), additional power is required
to power on the new line cards. If this additional power is drawn from the reserve power,
the switch no longer has N+N power supply redundancy. This condition raises a minor
alarm. If the condition is not corrected within 5 minutes, a major alarm is issued.
The configuration type of the switch and the number of ports enabled for PoE determine
the minimum number of power supplies needed (N) for the switch. You must then install
additional power supplies to meet the N+N redundancy configuration. For details about
different switch configurations, see
Chapter 2: Component Descriptions
for details about different
Minimum
Ports Enabled Number of
for PoE+ Power Supplies
(802.3at) Needed (N)
NA 1
0 1
96 2
NA 1
0 2
134 3
384 Not supported
"EX6210 Switch Configurations" on page
Power
Supplies
Needed for N+1
Redundancy
2
2
3
2
3
4
Not supported
7.
51