Hi Chris,
And thanks for your reply. I have followed the article to the letter and here are the steps I followed, documented in details.
GRE Tunnels
IAP configuration
Controller configuration
I tried with both Protocol number 48 and 1, but not 0. If I set the protocol type to 0, I get the following error message:
DHCP settings (Instant)
SSID settings (Instant)
If I set, the client IP assignment to Network assigned and Static VLAN 11, I lose the DHCP settings.
DHCP Server settings (Controller)
VLAN settings (Controller)
The solution still does not work. For some reason, the Instant AP delivers a default IP address (172.31.99.X), the GRE tunnels are up on the controller (#show datapath tunnel) but no data is passing through them.
To be hoonest, I feel like I spent enough time on this and since it's not working, I am thinking about an alternate solution as configuring such a straightforward setup should not be so hard.
Many thanks to all who have contributed to this.
Giuseppe Damiano/