Enabling Management VLAN on the AP effectively separates management traffic from user data traffic, but if the device is accessed from a network that is not VLAN-tagged with the VLAN ID configured on the ePMP AP, management access is unavailable.
Instead of factory-defaulting the ePMP AP to regain access, operators may also access the device by IP 169.254.1.1. In the latter case, configuration is retained on the ePMP AP.