@swright.mm the way i've set up this in the past is have my netboot server available at all sites. basically
here is a brief overview of what happens when you Netboot a client and what you need to do.
Computer chimes when you turn it on
The computer runs a self test and loads the machine firmware.
A blinking globe appears.
The computer is requesting an IP address and Netboot information:
DHCP and BSDP (boot service discovery protocol)
What you may or may not want to do:
Typically when a Mac client sends out a broadcast request for a netboot server it’s done over the same subnet. However, in your case broadcast information from the server doesn’t relayed past your routers, you need to add the IP address of your Netboot server to your router's DHCP helper table that way all clients on the subnet can boot to this netboot server when they request a BSDP ..To basically sum it up you need your guys/gals to configure the routers to send bsdp broadcasts to your net boot server
let me know if this helps
