I am using WP Super Cache 1.2 on a WP 3.5 multisite subdomain configuration. We are in the process of testing/setting up our CDN.
On the WP Super Cache Network Settings page it says, "You can define different CDN URLs for each site on a multsite network."
I tested adding a CDN URL to the network settings page anticipating that it would be defined across the network. However, it only affected the root url (home site).
Is it possible to define a CDN URL for the network and then where needed, e.g. on sites with mapped domain, being able to define the CDN URL on the individual site or is this a situation where we must define the CDN URL per site?