Juniper QFX5240 - Power off a QFX5240 Switch

• Keep ber-opc cable connecons clean. Microdeposits of oil and dust in the canal of the transceiver
or cable connector can cause loss of light, reducon in signal power, and possibly intermient
problems with the opcal connecon.
• To clean the transceiver canal, use an appropriate ber-cleaning device such as RIFOCS Fiber
Opc Adaptor Cleaning Wands (part number 946). Follow the instrucons in the cleaning kit you
use.
• Aer cleaning the transceiver, make sure that the connector p of the ber-opc cable is clean.
Use only an approved alcohol-free ber-opc cable cleaning kit such as the Opptex Cletop-
S
®
Fiber Cleaner. Follow the instrucons in the cleaning kit you use.
Power O a QFX5240 Switch
Before you remove the power cord to power o a QFX5240 switch:
• Ensure that you have taken the necessary precauons to prevent electrostac discharge (ESD)
damage. See No Link Title.
• Ensure that you do not need to forward trac through the switch.
Ensure that you have the following parts and tools available to power o the switch:
• An ESD grounding strap
• An external management device such as a PC
• An RJ-45-to-DB-9 rollover cable to connect the external management device to the console port
To power o a QFX5240 switch:
1. Connect to the switch using one of the following methods:
• Connect a management device to the console (CON) port on a QFX5240 switch. For instrucons
about connecng a management device to the console (CON) port, see Connect a Device to a
Management Console Using an RJ-45 Connector.
• Shut down the QFX5240 from a management device on your out-of-band management network.
For instrucons about connecng a management device to the management (MGMT) port, see
Connect a Device to a Network for Out-of-Band Management.
2. Shut down Junos OS from the external management device.
For QFX5240 systems:
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