gPXE boot

dhcp net0
kernel http://xxxxxxxxx/memdisk
initrd http://xxxxxxxx/xxx.iso
imgargs memdisk iso raw
boot

dhcp net0
chain http://www.bigyong.com/bullseye.gpxe

#!gpxe
kernel http://deb.debian.org/debian/dists/bullseye/main/installer-amd64/current/images/netboot/debian-installer/amd64/linux
initrd http://deb.debian.org/debian/dists/bullseye/main/installer-amd64/current/images/netboot/debian-installer/amd64/initrd.gz
imgargs linux
boot