Well my linux rmem_max is set to 64K, why should I make this more than
64K, that is when the maxwindow size is on the solaris side Right?
Anyway, what value do you think I should try in these registers?
On 4 May 2000, Jes Sorensen wrote:
> >>>>> "James" == James Sutherland <jas88@cam.ac.uk> writes:
>
> James> On Thu, 4 May 2000, Alan Cox wrote:
> >> > > The Sun used a larger window (64K versus 32K). > > Check that
> >> Networking options ... IP: Allow large windows is enabled in > your
> >> kernel build. This could be related to case 2?
> >>
> >> We will only offer 32K windows if the box the other end offers no
> >> window scaling either way. This is because we care about
> >> interworking with old equipment with sign handling bugs.
>
> James> These Sun boxes certainly shouldn't fall into that category,
> James> though, surely!
>
> First thing to check is whether the socket buffers are set
> appropriately, Linux defaults to a 64KB maximum which you need to
> modify via /proc/sys/net/core/[rw]mem_max before doing the
> setsockopt({SO_SNDBUF,SO_RCVBUF}). Without that you will never see
> scaling offer by the Linux side.
>
> Solaris 2.6 and above will do scaling per default if the socket
> buffers are set appropriately afaik. Solaris 2.5.x will fail miserably
> if offered a scaled window though.
>
> Jes
>
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