I have followed many older or broken guides and I am trying to load a ubuntu live iso on fog menu boot. I get to the point cannot find a live system on network even with working nfs amount. Any help would be appreciated.

Fog Menu options
kernel tftp://${fog-ip}/ubnt/casper/vmlinuz
initrd tftp://${fog-ip}/ubnt/casper/initrd
imgargs vmlinuz initrd=initrd ip=dhcp root=/dev/nfs boot=casper netboot=nfs nfsroot=192.168.7.5:/nfs/ locale=en_US.UTF-8 quiet splash rw
boot || goto MENU