How to change the MTU on a D-Link router ?
An appropriate MTU value is important to the proper operation of any network. To change the MTU on a DI series D-Link router, simply follow the steps below:
1. Connect to your router's admin interface. Usually 192.168.0.1. The default username is "admin" (without the quotes) and the default password is blank.
2. Click on the WAN (or ATM) button from the left vertical menu.
3. Find the "MTU" towards the bottom, enter your desired MTU value (usually 1500, or 1492 for PPPoE) in the text field, and click Apply. The router will restart to apply the new settings.
Some newer routers/APs may have different IP address or default username/password combination, you may want to check our hardware database for additional information about your specific model: D-Link routers database