# Configuring the MTU size on the Fortinet FortiGate 60D

**Step 1**

SSH into the Fortinet FortiGate 60D

**Step 2**

Enter the following commands to configure WAN1 to 1500

```shell
FGT60D4613044111 # config system interface

FGT60D4613044111 (interface) # edit "wan1"

FGT60D4613044111 (wan1) # set vdom "root"

FGT60D4613044111 (wan1) # set mtu-override enable

FGT60D4613044111 (wan1) # set mtu 1500

FGT60D4613044111 (wan1) # next

FGT60D4613044111 (interface) # end
```