In SPA122 with fw version 1.1.0 (11) tftp client is not operative when DMZ is Enabled, provisioning not working.
When DMZ is active, the request to SERVER TFTP to complete successfully but the response sent directly to the private IP (DMZ).
With fw version 1.0.2 TFTP cliente with DMZ enabled working properly.
For now. the solution is downgrade to fw version 1.0.2 (006).