Windows MTU Size

How to check Windows MTU size

To check the Vista MTU settings, open cmd.exe Run as Admistrator. Then type the following command:

netsh interface ipv4 show subinterface

It will display the result like below.
MTU MediaSenseState Bytes In Bytes Out Interface
—— ————— ——— ——— ————-
4294967295 1 0 40265 Loopback Pseudo-Interface 1
1300 2 91588 17394 Wireless Network Connection
1300 1 474010728 227948381 Local Area Connection


How to set Windows MTU size

To reset Vista MTU size, open command prompt as administrator and the use this following command
"netsh interface ipv4 set subinterface "Connection name" mtu=#### store=persistent"

For example the "Connection name" is Wireless Network Connection, the mtu #### is 1500, you will do: netsh interface ipv4 set subinterface "Wireless Network Connection" mtu=1500store=persistent.

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