Thomas
Tue Nov 14 10:14:25 CST 2006
You are correct about this, Stephan.
However, miniports that support changing the MTU for Jumbo frames employ a
miniport-specific private API for changing the "MTU". The only way to make
this sort of change is through the advanced configuration settings for the
adapter in the Network Control Panel.
Thos
"Stephan Wolf [MVP]" <stewo68@hotmail.com> wrote in message
news:1163520189.918822.24310@b28g2000cwb.googlegroups.com...
>I think we should distinguish between the MTU supported by the
> (virtual) network card NDIS miniport driver versus the MTU actually
> used by protocols like IP. For the latter, see what Thomas suggested.
>
> Some miniport drivers actually allow setting the MTU. This feature
> usually adds support for "Jumbo" frames, i.e. frames that are larger
> than the MTU defined by the IEEE 802.3 Ethernet standard, i.e. 1500
> bytes plus MAC header. IIRC, Jumbo frames can be up to 9000 bytes plus
> MAC header in size. Note that most Ethernet switches do not support
> Jumbo frames.
>
> Stephan
> ---
> Thomas F. Divine [MVP] wrote:
>> Search the MSDN for "MTU" and you will find the information you need.
>> Read
>> the MSDN topic "TCP/IP and NBT configuration parameters for Windows XP".
>>
>> Good luck,
>>
>> Thomas F. Divine
>>
>>
>> "Arsalan Ahmad" <arsal__@hotmail.com> wrote in message
>> news:OzpKnQ$BHHA.4844@TK2MSFTNGP02.phx.gbl...
>> > Hi all,
>> >
>> > I have a miniport adapter (Virtual NIC) driver. Can anyone tell me how
>> > can
>> > I change its MTU?
>> >
>> > Thanks,
>> >
>> > Arsalan
>> >
>