F5 BIG-IP DNS - Topology Load Balancing
I’ve already written about Data Center Load Balancing where I have even recorded a video with the F5 BIG-IP DNS configuration. I’ve also written about DNS Load Balancing, DNS Security, DNS over HTTPS (DoH) & DNS over TLS (DoT) and how to configure DoH and DoT with F5 LTM. However, I think I still have to learn a lot about this interesting and needed protocol that’s why I’ve been testing the topology algorithm in F5 BIG-IP DNS these weeks.
In fact, I’ve recorded a new video where you can watch how to configure F5 BIG-IP DNS for Global Server Load Balancing (GSLB). Firstly, I’ve created two nodes, two pools and two virtual servers where each of them could be a service hosted in different data centers. Secondly, I’ve created the DNS configuration such as the Wide IP with two pools, Data Center, Server, DNS listeners, Regions and Records. Finally, I’ve tested the configuration where you can watch how F5 DNS resolves DNS queries according to Regions and Records.
Actually, there are lots of ways to configure services in high availability using more than one data center. F5 BIG-IP LTM device and BGP protocol allow us to send traffic to several data centers for high availability but F5 BIG-IP DNS is also another way which allows us to configure a genuine GSLB topology.
Regards my friends! How do you design services in high availability between data centers?