---
title: syncSIOCSIFMTU
framework: kernel
role: symbol
role_heading: Instance Method
path: kernel/ionetworkinterface/1502944-syncsiocsifmtu
---

# syncSIOCSIFMTU

## Declaration

```occ
SInt32 syncSIOCSIFMTU(IONetworkController *ctr, struct ifreq *ifr);
```