# Change Windows Network Interface MTU

## Test MTU by Ping:

```bash
ping www.sina.com.cn -f -l 1500
```

\+ 28 bit once the max value found

```
netsh interface ipv4 show subinterfaces
netsh interface ipv4 set subinterface "Wi-Fi" mtu=1492 store=persistent
```

Test TCP latency with PsPing utility:

#### psping.exe -l 8k -n 36000s -h 1000 -4 [www.163.com](http://www.163.com/)