Dynamic node and pool member via dns.

Hello,

Here i am looking a solution for dynamic node via dns resolution. We have one vip with third-party hosted pool member. This node is hosted on akamai content delivery hence the ip address of this node/host is keep changing from one to another but we have a stable host-name. We are running on V11.5.1 and our dns server configured on ltm is capable to handle external domain resolution. can some one tell me a solution for this dynamic node selection based on dns.