Hi Michael Interestingly I just found this. Will run it past our IP Services team, but this may provide the workaround I'm looking for (without firmware changes) if gPXE will use the proxydhcp/next-server if next-server equals 0.0.0.0....
Quote: The upstream ISC DHCP 3.0.2+ removed the defaulting of next-server to the DHCP server's address, to be in compliance with the RFCs :

