One Common URL for both DC and DR sites.

Hi,

In working organization, we have one DC node and one DR node. Both are on-premises nodes. Whenever we do DR-Drill there will be slight changes in URL for DC/DR sites. As got one requirement stating that, Needed to setup one common URL where that maps both DC and DR site URLs to the common URL. Whenever DC or DR is down, there should be no change in URL and it should redirect to the same common URL from both DC and DR.

Kindly suggest whether this can be achieved in the application level while doing any setup or configuration.