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# nw_parameters_set_allow_ultra_constrained(_:_:)

```
func nw_parameters_set_allow_ultra_constrained(_ parameters: nw_parameters_t, _ allow_ultra_constrained: Bool)
```

## Parameters

`parameters`

The parameters to modify.

`allow_ultra_constrained`

Whether or not ultra-constrained interfaces are allowed.

## Discussion

\abstract Explicitly allow connectivity over ultra-constrained interfaces. Without
this being set, connections are not allowed to use these interfaces.

---

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