Adaptive routing controls features that modify the routing of requests to pools and origins 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 origin in the origin pool and a is occuring. No other error codes will trigger a zero-downtime failover operation.
Failover across pools
When there are no healthy origin servers in the same pool, failover across pools extend the zero-downtime failover of requests to healthy origin servers in alternate pools according to the failover order defined by traffic and origin steering.