Switch, “Connecting AC Power to an EX9208 Switch” on page 179, or Connecting AC
Power to an EX9214 Switch.
9. On the external management device, monitor the startup process to ensure that the
system boots properly.
NOTE: After you power on a power supply, waitfor atleast60 secondsbefore
youturn it off.Afteryoupoweroff a powersupply, waitfor atleast 60 seconds
before you turn it back on.
If the system is completely powered off when you switch on a power supply,
the RE module boots as the power supply completes its startup sequence.
If the Routing Engine finishes booting and you need to power off the system
again, first issue the CLI request system halt command.
After you power on a power supply, it can take up to 60 seconds for status
indicatorssuch as power supplyLEDs and the show chassis operationalmode
CLI command display to indicate that the power supply is functioning
normally. Ignore any error indicators that might appear during the first 60
seconds.
Related
Documentation
Installing an AC Power Supply in an EX9204 Switch•
• Installing an AC Power Supply in an EX9208 Switch on page 215
• Installing an AC Power Supply in an EX9214 Switch
Connecting DC Power to an EX9208 Switch
An EX9208 switch can be configured with up to four DC power supplies.
WARNING: Before performing DC power procedures, ensure that power is
removed from the DC circuit. To ensure that all power is off, locate the circuit
breaker on the panel board that services the DC circuit, switch the circuit
breaker to the OFF position, and tape the switch handle of the circuit breaker
in the OFF position.
CAUTION: Before you connect power to the switch, a licensed electrician
must attach a cable lug to the grounding and power cables that you supply.
A cable with an incorrectlyattachedlugcan damagethe switch (for example,
by causing a short circuit).
CAUTION: Mixing AC and DC power supplies in the same chassis is not a
supported configuration.
183Copyright © 2017, Juniper Networks, Inc.
Chapter 12: Connecting the Switch to Power
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