[lwip-users] Re: [lwip] MSS and config generally

[Kieran Mansley]

On 6 Jun 2002, Dirk Koopman wrote:
> On Thu, 2002-06-06 at 16:32, Kieran Mansley wrote:
> > On 6 Jun 2002, Dirk Koopman wrote:
> > > On Thu, 2002-06-06 at 15:50, Kieran Mansley wrote:
> > > > Alter TCP_MSS (in lwipopts.h) to your requirements?
> > >
> > > Tried that. Made no obvious difference.
> >
> > Hmm.  What is the MTU of your physical network?
>
> 1500 (actually it tries to negotiate 2000). The problem appears to be
> that lwip negotiates an MSS of 128 in the syn packet (or at least: I
> think it is).

Just a thought, but you did recompile lwip after making the changes to
lwipopts.h didn't you?  I would also check that the lwipopts.h file is
actually being compiled - could it be a dependency issue?

Kieran

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