This article helps to guide technical teams through the safe and effective steps for performing power maintenance on Juniper switches, minimizing downtime and ensuring system integrity.

Planned power outages or electrical maintenance may require switches to be safely powered down and restarted.

• Planned power outage or electrical maintenance in the data center
• Need to relocate or replace power sources connected to Juniper switches
• Preventive maintenance requiring switch shutdown and restart
• Risk of hardware damage due to improper power-off procedures

Pre-Maintenance Preparation:

• Inspect the switch environment for moisture, dust, and airflow obstructions.
• Check system health: alarms, fan tray status, and LED indicators.
• Backup the current configuration on the device as well as local PC using below:

root@user>show configuration | display set | save /var/tmp/<configuration_backup.txt>

root@user>show configuration | save /var/tmp/<config_json.txt>

root@user>show configuration | display set | no-more >>>>>>>>>>>>>>>Enable session logs when using following command on putty or secure crt sessions to save configuration on local PC

• Check the device status before the activity with below commands:

root@user>show system uptime

root@user>show chassis fpc detail

root@user>show chassis routing-engine

root@user>show chassis environment

root@user>show system alarms

root@user>show chassis alarms

root@user>show chassis environment pem 

Shutdown Procedure:

• Access the switch via console or SSH and provide the below command to power off the switch softly:

root@user>request system power-off

• Remove the power cables as a safety after shutting down the device completely.

Post-Maintenance Power-On:

• Reconnect the power cord and ensure stable power on redundant PSU's.
• Boot the switch and monitor system messages.
• Once the switch is back to online verify the device status with above mentioned commands.

Note: After power maintenance window if you observe any alarms related to the power supply units. Kindly reach out to JTAC for further support.