High-Available Anycast DNS Resolver for ISPs
11-08, 15:30–16:00 (Europe/Berlin), Main Stage

Fast DNS resolvers are a crucial component in delivering a snappy internet experience for end-customers. If the resolvers are down or under heavy load, even the best internet connection is useless for most customers.
In this talk I'll cover how to design and set up a scalable, highly available DNS resolver infrastructure for internet service providers.
- Anycast IPs using BGP for horizontal scaling and high-availability
- Health checks
- Scaling nodes vertically to optimize cache ratios
- Automation is key

By day network engineer at Wobcom (AS9136), by night network/linux/web engineering at (AS213027), Freifunk and infrastructure for NGOs.