Powering Off a QFX3500 Device

• Ensure that you have taken the necessary precautions to prevent electrostatic discharge (ESD) damage. See Prevention of Electrostatic Discharge Damage.
• Ensure that you do not need to forward traffic through the device.

• 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 off a QFX3500 device:

1. Connect to the device using one of the following methods:
   • Connect a management device to the console (CON) port in a QFX3500 device. For instructions about connecting a management device to the console (CON) port, see Connecting a QFX Series Device to a Management Console.
   • If you are using the QFX3500 device as a standalone switch, you can shut down the QFX3500 device from a management device on your out-of-band management network. For instructions about connecting a management device to the management (C0 or C1) port, see Connecting a QFX3500 Device to a Network for Out-of-Band Management.
2. Shut down the QFX3500 device from the external management device by issuing the request system halt operational mode CLI command. This command shuts down the device gracefully and preserves system state information. A message appears on the console, confirming that the operating system has halted.

   You see the following output (or something similar, depending on the hardware being shut down) after entering the command:

   Shutdown NOW!
   [pid 1764]
   
   user@device>
   
   *** FINAL System shutdown message from user@device ***
   System going down IMMEDIATELY
   
   
   JWaiting (max 300 seconds) for system process `vnlru_mem' to stop...done
   Waiting (max 300 seconds) for system process `vnlru' to stop...done
   Waiting (max 300 seconds) for system process `bufdaemon' to stop...done
   Waiting (max 300 seconds) for system process `syncer' to stop...
   Syncing disks, vnodes remaining...4 1 1 1 0 0 done
   
   syncing disks... All buffers synced.
   Uptime: 1d19h22m25s
   
   The operating system has halted.
   Please press any key to reboot.
   

   Caution: The final output of any version of the request system halt command is the “The operating system has halted. Please press any key to reboot” message. Wait at least 60 seconds after first seeing this message before following the instructions in Step 4 and Step 5 to power off the device.

3. Attach the grounding strap to your bare wrist and to a site ESD point.

4. Disconnect power to the device by performing one of the following:

   • AC power supply—If the AC power source outlet has a power switch, set it to the OFF (O) position. If the AC power source outlet does not have a power switch, gently pull out the male end of the power cord connected to the power source outlet.
   • DC power supply—Switch the circuit breaker on the panel board that services the DC circuit to the OFF position.

5. Remove the power source cable from the power supply faceplate:

   • AC power supply—Remove the power cord from the power supply faceplate by detaching the power cord retainer and gently pulling out the female end of the power cord connected to the power supply faceplate.
   • DC power supply—Remove the screws securing the ring lugs attached to the power source cables to the power supply using the screwdriver, and remove the power source cables from the power supply. Replace the screws on the terminals and tighten them.