I have a sub domain( I do not own the domain) but using Cpanel I am able to set A, NS, Cname records for a sub domain. What I want to do is to associate the subdomain with two webhost and prioritize them so that if the one with higher priority is down then the second webhost is used instead.
Now I have already set the NS records for both webhosts to the sub domain but I do not know if there exists a priority.
How do accomplish this task if it is possible?