Removing An Ac Power Supply From An Ex9251 Switch - Juniper EX9251 Hardware Manual

• Ensure that you have taken the necessary precautions to prevent electrostatic discharge (ESD)
Prevention of Electrostatic Discharge Damage
damage. See
• Ensure that you have the following parts and tools available to power off an EX9251 switch:
• An ESD wrist strap
• An external management device such as a PC
• The appropriate cable to connect the external management device to the console port labeled
CON on the switch
NOTE: After powering off a power supply, wait at least five seconds before turning it back on.
To power off the switch:
1. Connect a management device to the console (see
Using an RJ-45 Connector
2. On the external management device connected to the switch, issue the request vmhost power-off
command.
user@host> request vmhost power-off
Power-off the vmhost ? [yes,no] (no) yes
The switch shuts down and the console displays the message Power down.
To power on the switch again, press the button labeled OFFLINE on the front panel of the switch for
one second.
You can take the switch offline by pressing the button labeled OFFLINE on the front panel of the switch
for three seconds. If the switch is offline, you can bring it online by pressing the button labeled OFFLINE
for one second.
You can reset the switch by pressing the button labeled RESET on the front panel of the switch. You
must not use any sharp object to press the RESET button. You can use any blunt object of 1.5 mm
diameter to operate the RESET button.

Removing an AC Power Supply from an EX9251 Switch

Before you remove an AC power supply from the switch:
).
.
Connect a Device to a Management Console
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