Global traffic steering
Global traffic steering policies decide how a load balancer routes traffic to attached and healthy pools.
EDNS Client Subnet (ECS) support
Section titled “EDNS Client Subnet (ECS) support”EDNS Client Subnet (ECS) support provides customers with more control over location-based steering during gray-clouded DNS resolutions and can be used for proximity or geo (country) steering.
Customers can configure their load balancer using the location_strategy parameter, which includes the properties prefer_ecs and mode.
prefer_ecs determines whether the ECS GeoIP should be preferred as the authoritative location.
| Type | Description |
|---|---|
"always" | Always prefers ECS. |
"never" | Never prefers ECS. |
"proximity" | Prefers ECS only when steering_policy="proximity". |
"geo" | Prefers ECS only when steering_policy="geo" and only supports country-level steering. |
mode determines the authoritative location when ECS is not preferred, does not exist in the request, or its GeoIP lookup is unsuccessful.
| Type | Description |
|---|---|
"pop" | Uses the Cloudflare PoP location. |
"resolver_ip" | Uses the DNS resolver GeoIP location. If the GeoIP lookup is unsuccessful, it uses the Cloudflare PoP location. |
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