Powering Off a QFX5110

date_range 09-Mar-21

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Before you remove the power cord to power off a QFX5110:

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 switch.

Ensure that you have the following parts and tools available to power off 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 off a QFX5110 switch:

Connect to the switch using one of the following methods:
- Connect a management device to the console (CON) port on a QFX5110. For instructions about connecting a management device to the console (CON) port, see Connect a Device to a Management Console Using an RJ-45 Connector.
- You can shut down the QFX5110 from a management device on your out-of-band management network. For instructions about connecting a management device to the management (C0) port, see Connect a Device to a Network for Out-of-Band Management.

Shut down Junos OS from the external management device by issuing the request system halt operational mode CLI command. This command shuts down the switch 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:

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System going down in 1 minute

*** System shutdown message from root@ ***

System going down in 30 seconds


*** FINAL System shutdown message from root@ ***

System going down IMMEDIATELY

Stopping cron.
Waiting for PIDS: 3494.
.
.
Waiting (max 60 seconds) for system process `vnlru' to stop...done
Waiting (max 60 seconds) for system process `bufdaemon' to stop...done
Waiting (max 60 seconds) for system process `syncer' to stop...
Syncing disks, vnodes remaining...0 0 0 0 0 done
All buffers synced.
Uptime: 3m26s
usbus0: controller did not stop
unloading fpga driver
Khelp module "jsocket" can't unload until its refcount drops from 5 to 0.
Rebooting...
cpu_reset: Stopping other CPUs
Consoles: serial port
BIOS drive C: is disk0
BIOS drive D: is disk1
BIOS drive E: is disk2
BIOS drive F: is disk3
BIOS 639kB/3144576kB available memory   

CAUTION:

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

Attach the grounding strap to your bare wrist and to a site ESD point.
Disconnect power to the switch by performing one of the following tasks:
- 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 plug 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.
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 socket 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.
Uncable the switch before removing it from the rack or cabinet.

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