[ofa-general] [PATCH] IPoIB UD 4K MTU support

[Shirley Ma]

On Thu, 2008-01-31 at 11:18 -0800, Roland Dreier wrote:
>  > There is no issue on getting local length error, but there is an issue
>  > when the other side set to 64k - 4 mtu, linux side set to 64k - 12 mtu,
>  > the none TCP based application will be broken without amdin's notice.
>  > TCP should be OK since it does MSS negotiation.
> 
> But the other side could easily have an MTU of 1 MB or 1 GB with a
> different IPoIB CM implementation.  So I don't see how we can fix this
> really.

It could be fixed by being able to set max IPv4 MTU 64k-4 and IPv6 MTU
4G-4.

Thanks
Shirley