UniFi devices have multiple states to let you know what is happening to them. UniFi Access Points have a few more states than any other devices, with 'Isolated' being the most common misconception.
What does 'Isolated' mean?
When a UniFi AP goes into 'Isolated' state, the AP will generally work as intended. It is disconnected from the UniFi Controller but will still broadcast the relevant SSIDs it was set.
What about Mesh?
When you are setting up a new meshed UniFi AP, the process to get it adopted can be by plugging in the AP to the wired network to get it adopted to UniFi and then once adopted, unplugging it and choosing its new location. While the AP is unplugged and gathering information about the mesh environment, it will go into the 'Isolated' state for a period of time, before coming online again.
If a UniFi AP was previously connected via mesh and has now gone into the 'Isolated' state, you can try the following steps:
Move the AP closer to another known online access point
Factory reset the UniFi AP (following our guide here)
Remove the AP from the UniFi Controller
Re-adopt the AP into UniFi
Update the device firmware
Wired devices
If a UniFi AP goes into 'Isolated' while it is connected to the wired network, this can mean one of a few things:
Wired connectivity has become compromised, the Ethernet cable may be faulty or damaged and the pins are providing power, just not data.
Some VLAN or firewall settings may have been changed, check the port profiles for the switch port and see if anything has been changed.
Otherwise, follow the next steps
Factory reset the UniFi AP (following our guide here)
Remove the AP from the UniFi Controller
Re-adopt the AP into UniFi
Update the device firmware
HostiFi
HostiFi provides hosting for both Ubiquiti and TP-Link software-defined-networking (SDN) applications, with servers for UniFi, UISP and Omada. We also offer professional networking consulting, with HostiFi Pro.
If you run into any issues, send an email to support@hostifi.com or contact us via live chat.