Added note about no support for SDN in 4.15 and later releases.

Signed-off-by: John Wilkins <[email protected]>

Author: johnwilkins

modules/assisted-installer-using-the-assisted-installer.adoc

@@ -21,7 +21,7 @@ The {ai-full} provides installation functionality as a service. This software-as
 ** Eliminates the need to install and run the {product-title} installer locally.
 ** Ensures the latest version of the installer up to the latest tested z-stream releases. Older versions remain available, if needed.
 ** Enables building automation by using the API without the need to run the {product-title} installer locally.
-* *Advanced networking:* The {ai-full} supports IPv4 networking with SDN and OVN, IPv6 and dual stack networking with OVN only, NMState-based static IP addressing, and an HTTP/S proxy. OVN is the default Container Network Interface (CNI) for OpenShift Container Platform 4.12 and later, but you can use SDN.
+* *Advanced networking:* The {ai-full} supports IPv4 networking with SDN and OVN, IPv6 and dual stack networking with OVN only, NMState-based static IP addressing, and an HTTP/S proxy. OVN is the default Container Network Interface (CNI) for OpenShift Container Platform 4.12 and later releases. SDN is supported up to {product-title} 4.14, but is not supported for {product-title} 4.15 and later releases.
 
 * *Preinstallation validation:* The {ai-full} validates the configuration before installation to ensure a high probability of success. The validation process includes the following checks:
 ** Ensuring network connectivity