diskless boot, nfs server behind router

[alexs at ulgsm.ru]

Hi all.


I tryed setup server for booting diskless hosts from different networks.

In one network booting is ok.
I see thet realtek 8139 pxe can`t load pxeboot file fromi tftp server from another
network.

By changing options in dhcp server, i resolve that pxeboot can load kernel
from this server, but than kernel trying mount nfs root file system its
failing. 
Later mounting from /etc/fstab is ok.

Maybe im wrong? but diskless booting in several networks possible ony using
several servers, one in each network?

I think pxe rom on nic and kernel nfs root mounting can`t work on 3-layer.

p.s.
diskless freebsd 7.1
server freebsd 8.1Pre

-- 
alexs