D-Link AC1900 User Manual page 137

Section 7 - Troubleshooting
You should start at 1472 and work your way down by 10 each time. Once you get a reply, go up by 2 until you get a
fragmented packet. Take that value and add 28 to the value to account for the various TCP/IP headers. For example, lets say
that 1452 was the proper value, the actual MTU size would be 1480, which is the optimum for the network we're working with
(1452+28=1480).
Once you nd your MTU, you can now con gure your router with the proper MTU size.
To change the MTU rate on your router follow the steps below:
the device.
Setup and then click Manual Con gure.
of ten.
D-Link DIR-878 User Manual
OK.
OK to enter the web con guration page for
Save Settings to save your settings.
133