Re: [Ltsp-discuss] NFS Networking Issues

[Casey W. <cas...@gm...>]

I'm using a DHCP relay agent on the FreeBSD router.  You don't need to 
have a DHCP server in the same subnet as the thin clients if you're 
relaying the DHCP requests to a DHCP server in another subnet.  DHCP 
wasn't the issue at all since I could get an IP and boot up via TPFT.  
It was getting 90% of the way through the boot and then hanging when it 
tried to NFS mount the server.  This was likely due to the issue with 
large UDP packets.  I changed the pxelinux.cfg/default MOPTS file to 
switch NFS over to TCP and specify smaller UDP packets and that resolved 
the issue.  I don't know which did the trick (TCP or smaller UDP packets).

Thanks!
Casey



Cristi Mitrana wrote:
> On 5/16/06, Scott Balneaves <sba...@le...> wrote:
>> On Tue, May 16, 2006 at 11:22:56AM -0600, Casey Woods wrote:
>>
>> <snip>
>>
>> > I'm not doing any filtering that should affect anything.  It's just
>> > doing IP forwarding between subnets.
>>
>> Doing any UDP forwarding? NFS uses UDP for it's work.  That's probably
>> the root of your problem.
>>
>> How are you handling dhcp with a router in between?  Why not just put
>> the ltsp server on the same subnet?
>
> Not to mention that probably the DHCP traffic cannot reach the dhcp 
> server.
> Try installing the dhcpd server on the freebsd box and poing with the
> 'next-server' option (see the wiki) to the real NFS server. Also (also
> in the wiki) see how you can modify via the MOPTS variable the NFS
> mount to be done via TCP. But you should also allow UDP traffic
> through the freebsd box (so the LTSP stations can get the kernel via
> TFTP from the TFTP server, I presume it's the same as the NFS/DHCP
> server now) otherwise try putting it also on the freebsd box.
>
> hth,
>
>