Help us improve your experience.

Let us know what you think.

Do you have time for a two-minute survey?


request system firmware upgrade jfirmware poe



Upgrade the PoE controller software on switches and line cards through jfirmware.

The Junos OS image running on the switch contains a copy of the PoE controller software. This command compares the Junos OS version with the version of the software running on the PoE controller. If the Junos OS version is a more recent version, the command downloads the more recent version to the controller.

We recommend that all members of a Virtual Chassis run the same version of the PoE controller software.

Upgrading the controller software can take up to 10 minutes. Use the show poe controller command to monitor the progress of the software download.

If you load a version of the Junos OS software that is not compatible with the PoE firmware version, a major alarm will be raised. See Table 1 for firmware compatibility.

Table 1: PoE Firmware Compatibility

PoE Firmware


Junos OS Release

Prior to 19.3R1

19.3R1 and later


PoE-at is supported.

POE-bt is not available.

PoE-at is supported.

PoE-bt is not available without firmware upgrade.


PoE-at is not supported.

PoE-bt is not available.


Firmware downgrade is required for PoE.

PoE-at is supported.

PoE-bt is supported.


file (jfirmware-file)

File name of the jfirmware package.

fpc-slot (number | all-members)

Upgrade the PoE controller firmware for the Virtual Chassis member or line card specified by number, or for all Virtual Chassis members and line cards, specified by all-members.


(EX4300-48MP switches only) Rollback the PoE firmware to IEEE 802.3at (PoE-at).


(EX4300-48MP switches only) Upgrade the PoE firmware to IEEE 802.3bt (PoE-bt).

Required Privilege Level


Output Fields

When you enter this command, you are provided feedback on the status of your request.

Sample Output

request system firmware upgrade jfirmware poe file jfirmware-x86-32-19.3F1.1.tgz

Release Information

Command introduced in Junos OS Release 19.3.