13. F5 GSLB Configuration Example 2, include: configuring BIG-IP DNS Sync Group

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In this section, we will explore how to configure F5 DNS GSLB with two F5 devices, each with both DNS and LTM modules, in different data centers.
With F5 DNS GSLB, we can distribute traffic between data centers. With F5 LTM, we can distribute traffic locally among servers in each data center.
We will also learn how to monitor the health and performance of remote F5 devices by using iQuery protocol and big3d agent with the “bigip_add” tool, and how to synchronize the GSLB configuration between F5 devices by using iQuery protocol and the “gtm_add” tool.

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10. F5 DNS Resolver Cache

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F5 DNS resolver cache is a feature that enables BIG-IP system to resolve DNS queries itself using either an iterative or a recursive method. It caches DNS responses and answers subsequent queries for the same name from the cache. This improves DNS performance and reduces the load on external DNS servers.

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8. F5 LTM DNS load balancing

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F5 LTM DNS load balancing allows you to distribute DNS traffic across multiple servers using BIG-IP LTM feature. It can improve performance, availability, and security of DNS servers and applications. You can use health monitors, persistence profiles, and iRules to customize the load balancing behavior and enhance the user experience.

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