Any Recommendation on creating a custom iso from installed OS

[robinsmidsrod]

If you get an ath0 device auto-populated inside that file, it does seem like you have a wireless card in the machine. You could completely disable wireless support in iPXE (see the files in src/config/*.h for details) which should hopefully avoid the timeout issue. Also, I would suggest using the first port on the multiport network adapter for PXE, as it means iPXE won't need to cycle through DHCP on the other ports first. Also, you should use either the command dmesg or the log file /var/log/dmesg to look up hardware detection information.