---
title: "nw_parameters_set_allow_ultra_constrained(_:_:)"
framework: network
role: symbol
role_heading: Function
path: "network/nw_parameters_set_allow_ultra_constrained(_:_:)"
---

# nw_parameters_set_allow_ultra_constrained(_:_:)

## Declaration

```swift
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

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