When you want to redirect DNS queries for a web site to a different web site, create a wide IP that represents the original web site, and add a pool configured with a CNAME to the wide IP to redirect the requests to the new destination.
A CNAME record specifies that a domain name is an alias of another domain. When you create a pool with a canonical name, BIG-IP® Global Traffic Manager™(GTM™) responds to DNS name resolution requests for the CNAME with the real fully qualified domain name (FQDN).
Perform these tasks to redirect a DNS request using a wide IP, which includes a pool that is configured with a CNAME.
You now have an implementation in which BIG-IP® GTM™ resolves a DNS query for a wide IP to a CNAME. The LDNS must further resolve the CNAME to an IP address.