F5 Distributed Cloud DNS Management

F5 Distributed Cloud DNS delivers high-performance, resilient, and globally distributed authoritative Domain Name System (DNS) services with built-in DNS load balancing and automated health-based failover.

Resolution & Routing Architecture

+-------------------------------------------------------------------------+
|                    Global Anycast DNS Resolution Flow                   |
|                                                                         |
|  DNS Client Query (e.g. app.example.com)                                |
|        |                                                                |
|        v                                                                |
|  +-------------------------------------------------------------------+  |
|  | Globally Distributed Anycast DNS Edge PoPs                         |  |
|  +---------------------------------+---------------------------------+  |
|                                    |                                    |
|                                    v                                    |
|  +-------------------------------------------------------------------+  |
|  | Health Check Engine: Continuous Origin Availability Monitoring     |  |
|  +---------------------------------+---------------------------------+  |
|                                    |                                    |
|         +--------------------------+--------------------------+         |
|         | Primary Healthy                                     | Failed  |
|         v                                                     v         |
|  +-----------------------------+               +---------------------+  |
|  | Return Primary VIP A Record |               | Return Failover VIP |  |
|  | (192.0.2.10)                |               | (198.51.100.20)     |  |
|  +-----------------------------+               +---------------------+  |
+-------------------------------------------------------------------------+

Key Topics

Primary & Secondary DNS

Host primary authoritative zones or synchronize zones from existing master servers via AXFR/IXFR.

DNS Load Balancing (GSLB)

Route users to the nearest or best-performing data center using latency-based or geolocation routing.

DNSSEC Signing

Automated one-click DNSSEC cryptographic key management and zone signing.

Automated Failover

Sub-second rerouting around cloud provider outages or degraded application origins.

Documentation Roadmap

• DNS Architecture: Anycast network topology, query flows, and TTL optimization.
• Deployment Walkthrough: Zone delegation, record creation, and health check attachment.
• Secondary DNS Synchronization: Configuring zone transfers (AXFR) and TSIG key authentication.
• Failover Simulation & Verification: Simulating origin failure and observing automated DNS steering.