@thezman007 said in PXE partial success, no tftp:
My current setup seems to allow our PXE boot to partially work, but ultimately fails. It appears that our proxyDHCP via dnsmasq is working and our main DHCP server is handing out IPs while our fog server is directing devices to itself for PXE services, but the overall process fails once tftp should be serving the .efi file. We’ve tried using a different computer when attempting to PXE to try and eliminate model specific quirks. I’ve also tried changing the file dnsmasq should serve (snponly.efi or ipxe.efi) with no change. tftp via locahost works as expected, tftp over LAN fails. There are NO tftp requests seen from tcpdump during PXE boot, but I can’t provide that data until my tech returns on-site next week.
This is the most important section.
what I want you to do is run tcpdump from the fog server. I want you to use the pcap filter of port 67 or port 68 or port 4011 or port 69
That will capture dhcp, proxy-dhcp and tftp.
Review the pcap with wireshark. You should see the DORA process if the fog server is on the same subnet as the pxe booting client.
Discover
Offer
Request
Ack/Nack
What will be important to watch is to make sure the client is getting two offer packets. Once will be from your main dhcp server and the second one from dnsmasq. If you are not seeing the one from dnsmasq server then that is the start of the problem. If you do see two and one is from your dnsmasq server then go to the next part.
Now that you verified that dnsmasq is seeing the DISCOVER packet and responded with an OFFER packet then after DORA you should see the client call back to dnsmasq on port 4011. In that transaction the client will be told the boot server and boot file. Verify these are correct.
And finally the client should reach out to the FOG server over tftp to first request the file size then request the file. So there will be two tftp communications, then the file should download.
