---
title: disableECN
framework: network
role: symbol
role_heading: Instance Property
path: network/nwprotocoltcp/options/disableecn
---

# disableECN

A Boolean that disables negotiation of Explicit Congestion Notification markings.

## Declaration

```swift
var disableECN: Bool { get set }
```

## See Also

### Customizing TCP Options

- [init()](network/nwprotocoltcp/options/init().md)
- [enableFastOpen](network/nwprotocoltcp/options/enablefastopen.md)
- [maximumSegmentSize](network/nwprotocoltcp/options/maximumsegmentsize.md)
- [noDelay](network/nwprotocoltcp/options/nodelay.md)
- [noOptions](network/nwprotocoltcp/options/nooptions.md)
- [noPush](network/nwprotocoltcp/options/nopush.md)
- [retransmitFinDrop](network/nwprotocoltcp/options/retransmitfindrop.md)
- [disableAckStretching](network/nwprotocoltcp/options/disableackstretching.md)