Upon CDN resource creation/edit, enable "Advance Settings":
Secondary CDN Hostname
- User is capable of adding up to 7 Secondary CDN hostnames with the same origin. User can take advantage of parallel download to speed up page loading speed.
You will need to setup the CNAME for both CDN hostname and Secondary CDN hostnames.
(1) If you create a CDN resource with settings:
CDN Hostname: cdn.example.com
Secondary Hostname: cdn1.example.com , cdn2.example.com
(2) When visitors visit to cdn.example.com , cdn1.example.com, cdn2.example.com , all 3 URL will display "example.com" content. Secondary hostname allows parallel download to speed up loading speed.