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Route failover excludes already attempted upstreams · case 05

Route failover excludes already attempted upstreams.

Member previewVariant 5 · 3 implementations · 4 checks per implementation

Case contract

Bounded offline decision model: route failover excludes already attempted upstreams. Inputs are already validated protocol fields; the explicit fixtures define the supported policy, not a complete protocol implementation.

Why this case matters

This deterministic network routing model isolates the route-failover-excludes-already-attempted-upstreams policy at a network component boundary.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
fixture 4	`["a"]`	`[]`	Failed

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