I was thinking about that... Technically, you COULD set up a syslog server, and get DHCP announcements..
But as you pointed out, the REAL reason is PXE boot.. (I doubt very many 'routers' support PXE booting, even IF you specify the tftp as another IP...)
I'm wondering if there is a way to set up an 'advanced' system with dual DHCP subnets...
possibly like the
External IP: 192.168.80.254 (connected to Internal Network of LMCE)
DHCP set to 192.168.79.1-192.168.79.255
LMCE External IP: direct to Internet
LMCE Internal IP: 192.168.80.1
LMCE Subnet: 255.255.0.0
LMCE DHCP range: 192.168.80.129-192.168.80.253
Then, you have 2 networks, both internal, and the DHCP for the Router handles 192.168.79.x
and the DHCP for LMCE handles 192.168.80.x
I think you'd need to also set up a route in LMCE..
I haven't tested this, I'm just brainstorming here, and this might be in left field.
(I still haven't figured out WHY you would want to do this...)
(FYI, this is WAY too complicated for a noob install)
I have the opposite here...
I have my 7 NIC firewall that runs with static addresses on 4 NICs and serves DHCP on 3
I have my normal computers (desktops) on 2 of those NICs, one of which wireless card, as the firewall also acts as AP on that card.
I have my LMCE core installed on the third DHCP served card, it serves the as DHCP for the LMCE core's external NIC, the core's internal NIC acts as a DHCP for all my multimedia devices like dreambox, xbox, ps2, md's etc.
The other static NICs in the firewall are the external interface connected to the Internet and the rest are DMZ's for different servers like ldap, mail, dns, db, www and an old asterisk install that I probably will trash and use the one in LMCE instead.
I don't see any reason why it shouldn't be possible to do as you suggest, I am positive that it would work. I don't think it should be that hard either, it should work more or less out of the box...
My reason, btw, is security... I like to have a segmented network... ;o) I guess that it should be quite good for performance as well to keep the media network traffic on a separate segment than the rest of your network...