CS,

I'm guessing the RTL8029 is a 10mbit card.

There's a problem that many people have had with fast server cards and
slow client cards when a 2.6.x kernel is used on the server.

The problem is caused by the 2.6 kernels using a large default blocksize
for NFS packets.  The 2.6 kernels use 32k blocks, where the older
kernels used 8k blocks.  What happens is the 32k byte blocks need to be
broken down into 1500 byte datagrams.  Simple math will tell you that
you need a whole lot more 1500 byte datagrams to make up a full 32kbyte
block.  Sending those datagrams to a 10mbit card takes too long for all
of the datagrams to get there, so the NFS client times out before
getting all of the fragments.

Fortunately, there's an easy fix.

You need to pass some options to the client to tell it to use smaller
block sizes for NFS.

You'll need to add the following 2 lines to your dhcpd.conf file.

  option option-128 code 128 = string;
  option option-129 code 129 = text;

  option option-128  e4:45:74:68:00:00;
  option option-129  "MOPTS=nolock,ro,wsize=2048,rsize=2048";

Take a look at the following wiki article for more info on passing
parameters to the kernel:

   http://wiki.ltsp.org/twiki/bin/view/Ltsp/KernelOptions


Jim McQuillan
[EMAIL PROTECTED]





On Fri, 10 Jun 2005, Catherine [iso-8859-1] St�fan wrote:

> Hello,
>
> When I try to boot my (future...) LTSP client, it has a RTL8029 network card,
> it ends up saying :
>
> "nfs warning: mount version older than kernel
> Doing the pivot_root"
>
> I have been investigating on the web, it seems that my case is not isolated
> but I couldn't find any answer.
>
> I have another client, with a Sis900 that works great with the very same
> server.
>
> I have tried with different versions of the Etherboot floppy, gathered on
> rom-o-matic. But still, it remains stuck.
>
> Does anyone have an idea of where the problem is ?
>
> Many thanks in advance,
>
> CS
>
>
>
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