---
title: "Advanced DNS: Real-Time, RUM-Driven Load Balancing"
description: "Advanced DNS uses real user measurement to route traffic to the best-performing CDN in real time, with automatic failover for redundancy and availability."
canonical_url: https://optimi.com/en/performance/advanced-dns
md_url: https://optimi.com/en/performance/advanced-dns.md
last_updated: 2026-09-04
---

# Advanced DNS

Dynamic, real-time traffic load balancing driven by real user data, built for redundancy and an optimised user experience.

**Advanced DNS** ensures service **redundancy** and an optimised **user experience**.
Our Real User Measurement (RUM) data lets us customise DNS responses and reroute
traffic in real time when networks degrade. Service availability and user experience
are the priority. Every request goes to the network best able to serve it right now.

*RUM data continuously scores each network, so traffic always lands on the best-performing CDN for that user.*

- Users (RUM measured)
- Optimi Advanced DNS
- Best CDN now — live
- Alternate CDN — scored
- Failover — auto

## Advanced. Automatic. Dynamic.

- **Adaptive Routing** — Our Real User Measurement tag collects end-user data in real time, enabling intelligent automatic routing. We pick the best-performing CDN in the network at the moment of the request, based on the user's location.
- **User Experience** — RUM gives a true picture of the internet's state. Advanced DNS goes beyond geo-proximity, using last-mile performance and availability data to cut page load times and video buffering and improve download speeds.
- **Bespoke Setup** — By default Advanced DNS routes by CDN performance, but rules can be configured for geography, traffic commitments or business needs, gaining performance, redundancy and availability.

> **Beyond geo-proximity**
>
> Most DNS routes by location alone. Advanced DNS uses live last-mile measurements, so
>   decisions reflect what users actually experience, not just where they sit on a map.

## Main features

- **Global Anycast network** — Queries answered from the nearest PoP, worldwide.
- **Real-time load balancing** — Traffic steered by live performance data.
- **100% uptime SLA** — Backed by a self-healing, redundant network.
- **Automatic failover** — Reroute instantly when a network degrades.
- **Monitoring & reporting** — Visibility into routing decisions and health.
- **Easy configuration** — Define routing rules without operational overhead.

## What you gain

- **Redundancy** — Failover across multiple networks.
- **Better user experience** — Lower latency and less buffering.
- **Availability** — Stay online through network disruptions.
- **Cost optimisation** — Route by commitments and business rules.

## Related guides
- [edge-delivery](/en/guides/tags/edge-delivery)
- [edge-management](/en/guides/tags/edge-management)

[Get in Touch](/en/contact): Need redundancy and real-time load balancing? — Talk to our team about RUM-driven Advanced DNS for your traffic.