Changing the mtu size in windows vista, 7 or 8 setting the mtu size: once the command prompt window is open follow the steps below to change the mtu size: type netsh interface ipv4 show subinterface; press enter. you will see a list of network interfaces.. The only place to change mtu settings is on your router or modem. everyone i have ever known who has broadband needs a router or modem to get it to work. its like a little box with lights on that. Correcting a mtu issue: the first step in correcting a possible mtu issue is to contact your isp (internet service provider). ask them what their mtu is set to. ask them what their mtu is set to. this way you can adjust your router to the same settings..
In the mtu size field, enter a value from 64 to 1500. click the apply button. your settings are saved. if you suspect an mtu problem, a common solution is to change the mtu to 1400. if you are willing to experiment, you can gradually reduce the mtu from the maximum value of 1500 until the problem goes away.. In the mtu size field, enter a value from 64 to 1500. click the apply button. your change is saved. if you suspect an mtu problem, a common solution is to change the mtu to 1400. if you are willing to experiment, you can gradually reduce the mtu from the maximum value of 1500 until the problem goes away..
