Cisco Aironet 340 and 350 series bridges can be connected to the same LAN segments, but they cannot communicate wirelessly.
The 340 and 350 series bridges are not designed to work together. If you use both the 340 and the 350 series bridges on your network, make sure that the 340 series bridges have radio bridge links only to other 340 series bridges. The 350 series bridges must have radio bridge links only to other 350 series bridges.
For more information, refer to the Limitations and Restrictions section of the Release Notes for Cisco Aironet 340 and 350 Series Access Points.
Intermittent connectivity - flapping
What can you ping?
Cannot ping peer
VxWorks Errors, Warnings, Statistics and Log Messages
Disassociating [hostname][MAC address], reason Not Associated