We need more information to best answer this inquiry.
That stated, if you are looking for redundancy then using an NLB for high availability is the way to go.
You can have passive/active configuration as per your organizational needs.
Take a look at the link below, there is a section for high availability configurations. http://wiki.gis.com/wiki/index.php/GIS_Product_Architecture
Signed in members can post, follow updates, and more. New here? Register a free account.
Find useful guides, FAQs, and documents to help you navigate and make the most of Esri Community.