NetBoot appears in startup disks but clients will not boot to the images

Question

I recently upgraded a 10.6.8 server to 10.7.4 server. I did a clean update but saved all the needed information off of it.
The problem I am having is with Netboot. I have the service enabled and the images are in place again. These are the same images from the old server, so I know they worked at one point in time.
Now I can goto the Startup Disk option and see the disks there, but when I try to Netboot I just get the folder with the question mark.
This is in a school so we do have multiple subnets, however the IP address on the server remained the same, so the helper addresses are still working.
I have tried to create a new netboot image, but I am new to all of this and it didn't work (I blame me not knowing how to make one, so yeah).
I am currently trying to use Deployment Studio (as was suggested here https://discussions.apple.com/thread/3962094?start=0&tstart=0), but I really think there is something wrong with my set up of the server and not the images.
Any help is greatly apprecaited.
Thank you,
Keegan

Answer 1

It is possible that one of underlying services required isn't running or configured properly. Here's a little script I wrote to help diagnose issues like this.
If the output doesn't help you figure it out on your own, paste it back into this thread.
-Brian
#!/bin/sh
# netboot_service_states.sh
httpNetBootPath="/Library/Server/Web/Data/Sites/Default/NetBoot"
nfsExportsPath="/etc/exports"
tftpNetBootPath="/private/tftpboot/NetBoot"
serviceDataPath="/Library/Server/NetInstall"
savedClientsPath="${serviceDataPath}/ClientData"
savedImagesPath="${serviceDataPath}/ImageData"
# Dump state pertaining to the bootp service
isRunning=`sudo launchctl list | grep bootpd`
serviceState="enabled"
if [ "${isRunning}" == "" ]; then
          serviceState="disabled"
fi
echo "bootp service is ${serviceState}\n"
# Dump state pertaining to the TFTP service
isRunning=`sudo launchctl list | grep tftp`
serviceState="enabled"
if [ "${isRunning}" == "" ]; then
          serviceState="disabled"
fi
echo "TFTP service is ${serviceState}"
echo "TFTP Service data folder"
if [ -d "${tftpNetBootPath}" ]; then
          ls -lsa "${tftpNetBootPath}"
fi
# Dump state pertaining to the HTTP service
echo "\nHTTP service data folder"
if [ -d "${httpNetBootPath}" ]; then
          ls -lsa "${httpNetBootPath}"
fi
# Dump state pertaining to the NFS service
echo ""
nfsd status
if [ -e "${nfsExportsPath}" ]; then
          echo "Contents of ${nfsExportsPath} is:"
          cat "${nfsExportsPath}"
fi
# Dump state pertaining to the re-promotion data cache
if [ -e "${savedClientsPath}" ]; then
          echo "\nSaved client share points"
          cat "${savedClientsPath}"
fi
if [ -e "${savedImagesPath}" ]; then
          echo "\nSaved image share points"
          cat "${savedImagesPath}"
fi