---
title: Adaptive routing
description: Route traffic based on origin health and latency.
image: https://developers.cloudflare.com/core-services-preview.png
---

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# Adaptive routing

Adaptive routing controls features that modify the routing of requests to pools and endpoints in response to dynamic conditions, such as during the interval between active health monitoring requests. 

Zero-downtime failover will trigger a single retry only if there is another healthy endpoint in the pool and a [521, 522, 523, 525 or 526 error code](https://developers.cloudflare.com/support/troubleshooting/http-status-codes/cloudflare-5xx-errors/error-521/) is occurring. No other error codes will trigger a zero-downtime failover operation.

## Failover across pools

When there are no healthy endpoints in the same pool, failover across pools extend the zero-downtime failover of requests to healthy endpoints in alternate pools according to the failover order defined by traffic and endpoint steering.

### Enable failover across pools

1. In the Cloudflare dashboard, go to the **Load Balancing** page.  
[ Go to **Load Balancing** ](https://dash.cloudflare.com/?to=/:account/load-balancing)
2. Navigate to your Load Balancers and select **Edit**.
3. From **Adaptive Routing**, enable **Failover across pools**.

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