MSM422 APs fails to connect to MSM760 controller

[JesperF]

Hi all,
 
I have a teamed setup with two MSM760 and a mix of MSM422 and MSM430 (123 APs in total).
 
My problem is that if I shut down the primary controller, only 2 of the MSM422 will connect. The remaining 35 MSM422 APs just says establishing tunnel, and then they disconnect after a while and then they try to connect again. I don't see this problem if I shut the secundary controller
 
I have recently upgraded firmware on the controllers to ver. 6.4.2.0-19648 hoping that it would solve the problem, but that didn't help.
 
 
Any good ideas

Rgds,

Jesper

[Arimo]

Are you doing L2 or L3 discovery? If L2, are you discovering on the Internet or LAN port subnet, or in a VLAN?

[JesperF]

it's layer3 discovery on the internet port.

This have worked before. It seems a bit strange that 2 MSM422 can connect to the controller, but 35 MSM422 can't

Kind regards,

Jesper