TFTP Problems
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With a subnet mask fo 255.255.0.0, all of your 10.8.x.x addresses are logically in the same subnet. I’m assuming you don’t have your network subdivided into VLAN’s and subnets, you just serve DHCP for 10.8.10.1 to 10.8.15.255, and non-DHCP clients are statically assigned an address from outside that range. Is this correct?
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My network is divided into VLANS, each building is 10.x.1.1 where x is 1-10 and 1-10 is the building designated to that ip scope, they all use the same subnet mask and dns/dhcp information, the only change is the ip addresses the buildings serve.
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Your network configuration seems unusual to me. I don’t know if it has any thing to do with the problems you’re experiencing, but I don’t have a good feeling about it. It could be my lack of experience with advanced networking, or there could be something not quite right about your subnetting. We’ll ignore that for now though.
Are you able to connect a PXE boot client to the same switch as the FOG server? I don’t mean just the FOG server and the client, it should be on your network. I just want the client and the server to both be on the same switch for the moment.
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yeah every test I have ran up to this point has been within my office on the same switch as the FOG server, and the switch I am using is an Asus GX-D1081.
I agree our network seems a bit odd, but I was neither the person that designed or set it up so it is out of my control, I merely make sure all the components in this building work, and make the teachers happy
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Shameless bump still need help please
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At this point, I would normally through a tech workstation on that switch, mirror/monitor a port, wireshark and see what is happening between the FOG server and the client.
If you are not able to do that, then go ahead and proceed with setting up proxyDHCP according to the wiki article.
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What port do you recommend I watch? port 69 is the TFTP port correct?
I’m willing to try the proxyDHCP again after I do the wireshark, i’d really like to figure out what the underlying issue is an try to eliminate it.
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When I was investigating mine, I started recording, tried to pxeboot and waited for error, then stopped recording. I went through several filters at different times to make sure the pxe boot was getting the correct next server name and bootfile name from dhcp. Then I filtered on tftp, or just everything matching the IP address the client got from DHCP.
You can key in on the tftp problems, and see if it’s making a request for the pxelinux.0 file and getting all the chunks. In my case, it requested and got chunk 1, but then failed to get the rest of the chunks until I implemented proxyDHCP.
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Alright, I have captured a set of packets from the time I began my Pxe boot till the time I got the error PXE-E32 TFTP open timeout.
but I don’t actually see the host’s ip address or mac address in the set of information, is this a problem.
What set of filters would you recommend, I do not see anything being transferred on TFTP.
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Did you mirror the port on the switch so you can see it’s packets? Whatever port the pxe client is connected to needs to be mirrored to the port your monitoring workstation is connected.
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my switch does not allow port mirroring (Asus GX-D1081), the procurve more than likely does, but here is a number of MDFs plugged in and I’m not exactly sure which one leased to my office.
I will install proxyDHCP tomorrow and see how it goes with 10.04.
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If you can replace the switch with a good old HUB, you might have some luck.
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I will see what I can find.
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Well i didn’t find a hub, I had a linksys wrt54g someplace that had ddwrt on it but I must have loaned it to someone because I can’t for the life of me find it. So I never will know what it was that is being stopped but I believe it’s similar to your situation that you described where a chunk of it is received but the rest is not.
I have installed proxyDHCP and it seems to be happily working on 10.04 LTS.
Now I can boot to my pxelinux.0!!!I appreciate all your help with this and your time, I’m going to be using it this summer and hopefully set up a few nodes in a few other buildings if all goes according to plan, so far it’s not been that bad of an experience just a typical Linux install lol.
