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Folding Farm Routing Troubles

H

hoobie7

Limp Gawd
Joined
Mar 12, 2005
Messages
233
Ok, so I've got my first Folding Farm set up. I'm using a diskless farm running off TFTPD32 on my server.
I've been having all kinds of trouble setting it up.
But I've finally gotten it all runing.
The server hands out IP's then the PXE linux.
THe problem is when the workers go to DL a WU they can't get throught the server to Stanford.
How do I get my Windows 2K3 server to pass on the router requests from the workers to my home network's router?
Do I use NAT to accomplish this?

Here's a pic to help.
Network%20Map.png


Please help! I'm so close to getting it working!

Hoobie:)
 
My best suggestion would be to PM unhappy_mage on this one. He is one of the few people who can understand what you just said.
 
Is PXE Linux using a DHCP client on boot to request an IP from your Windows server? Is there a DHCP server on your network to hand out internal IPs? If so, adding udhcpc to startup would probably fix the problem.
 
Ok, so I've been delving into this more. My original setup was based off the tutorial here.
In the tutorial their running linux on the server box. I had a Win 2K3 server already so I was gonna use that. I just assumed it would have the same functionality. ;)
Of course, that didn't quite pan out. I had to use TFTPD32 from here, to do DHCP and TFTP for the diskless nodes.
But that actually is working quite well now... after some fiddling.
The only speed bump left in my way is the worker nodes are showing "Host name lookup failure" when trying to get a WU from Stanford.
I made the assumption I would be able to do IP masquerading in Win 2K3.
So, the long and short of it is:

Can I do IP masquerading in Win 2K3?

Thanks for any and all help!
Hoobie

EDIT: tsuehpsyde, thats what the TFTPD32 is doing, actually a very handy tiny program!
 
Couldn't you uplink your farm switch to the router so that the folding farm gets 192.168.x.x IPs, then just connect the Windows server to the same switch as the farm, so that when they look to boot off the NIC, they grab the image from the server? I'm just not sure why you want to, in essence, create two routers on the network. The IP-based DHCP server and the PXE DHCP server can be physically seperate (I believe).

And why not replace the router with the physical server, and if wireless is needed, use the router as a WAP and not a DHCP server?

I could be wrong, that's why I'm asking the question. :)
 
Ya, I originally set it up just like in the tutorial. But yeah the more I look into it that would prolly be a loot easier. I would just need to run a second cable over to the farm from the router and then turn off the DHCP on the server right?
That might be a lot less heartache too.

Hoobie
 
Give it a shot and see what happens. But yes, you'd disable your second NIC/DHCP server on the PXE server, run a patch cable from the switch to the router (may require some fiddling depending on what the switches do to handle uplinks, best case you just plug and go), and try again.

If that doesn't work, then you have two options:

1. Figure out how to do routing over the 10. IPs over Windows (Internet Connection Sharing maybe?)
2. Make the Windows server your router.

Best of luck. :)
 
Do the machines get IP addresses? Run "ifconfig -a" and see if "eth0" has an addr: entry.

Do the machines get DNS information? Run "cat /etc/resolv.conf" and see if there's a "nameserver 1.2.3.4" entry there.

Can the machines ping your router? Your DNS server? How about vice versa? You may need to add a static route to the w2k3 box.
 
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