[vox-tech] 2 dhcp servers, one box

[Matthew Holland]

Does anyone have any experience running multiple dhcp servers out of one 
box?  Allow me to clarify... I have a box with three network cards: eth0 
is connected to the DSL modem, eth1 to a 192.168.0.0/24 network 
(MASQed), and eth2 will be connected to a 192.168.1.0/24 network (which 
I also intend to MASQ).  There are various cabling considerations that 
have made this arrangement seem sensible.  I'm running dhcpd on eth1, 
because there are as many laptops in the house as desktops.  The 
potentially tricky part is that I installed eth2 so that I can plug my 
laptop into it when I'm in the same room as the router.  This makes it 
appealing to run dhcpd on eth2 as well, so that I don't have to do any 
funny voodoo every time I plug the laptop into a different network.

That said, there may be some voodoo to do concerning the configuration 
of dhcp.  There's no issue of overlapping blocks of addresses since the 
networks are different.  The question is, do I need multiple copies of 
dhcpd.conf and dhcpd.leases, or can two daemons share the same files?  I 
imagine it's possible that both subnets could be defined in the same 
dhcpd.conf, since each instance of dhcpd should know which network it's 
on.  But then again, it may not work that way.

Any other gotchas that I should be aware of?  In case it matters, the 
machine is running Gentoo Linux.

Thanks,
Matt