When connecting an AP to a switch with PoE, we may encounter situations where functionality is limited due to the power supplied; this article will describe a potential issue
When checking the AP requirements we noticed that POE on BT mode is required for full funcionality
On 802.3at power, the AP will operate with reduced functionality. If all three Wi-Fi radios are enabled, they will operate at 2x2:2. If only two Wi-Fi radios are enabled, they will operate at 4x4:4 The scanning radio, BLE radios, GPS and UWB are always enabled regardless of power source.
For reference
https://www.juniper.net/documentation/us/en/software/mist/mist-wireless/topics/ref/ap-poe-requirements.html
When checking the current POE mode we noticed that the switch was running AT mode
mist@EX> show poe controller | no-more Controller Maximum Power Guard Management Status Lldp index power consumption band Priority 0 1700W 93.00W 0W Class AT_MODE Disabled
As per the feature compatibility the switch used on this case(EX4300MP) supports BT POE mode, other switch models will required further validation
https://apps.juniper.net/feature-explorer/feature/3401?fn=Power%20over%20Ethernet%20IEEE%20802.3bt
We will need to upgrade the firmware to BT mode, this ideally after hours, using the folloing guide:
https://www.juniper.net/documentation/us/en/software/junos/poe/topics/topic-map/poe-bt-upgrading.html