[nzlug] Routers in dhcp.conf

[Raimund Eimann]

Hi,

is there a possibility of providing subnet-specific routing information to 
dhcp-clients?

The problem:

Two subnets: 192.168.2.0/24 and 192.168.3.0/24

Router (towards Internet) is in 192.168.2.0/24 with IP 192.168.2.254. Router 
towards 192.168.3.0/24 is 192.168.2.247.

Router towards any other networks in 192.168.3.0/24 is 192.168.3.254 (second 
interface of host 192.168.2.247).

In 192.168.2.0/24 a DHCP server provides network info for clients. In its 
config, the "option routers" entry can be used to tell a client which route 
to use. Of course, its currently set to 192.168.2.254.

I don't see how an additional routing entry for the 192.168.3.0/24 net can be 
placed in the DHCPd config, so that 192.168.2.0/24 clients also know how to 
reach hosts in 192.168.3.0/24.

Currently, if I want 192.168.2.0/24 machines to be able to contact 
192.168.3.0/24 machines, I need to alter the routing table on the affected 
machines manually. This is not very elegant.

If someone has a solution, I would appreciate to hear about it.

Additional question:

Currently, a second DHCP server runs on 192.168.3.254 to serve clients in 
192.168.3.0/24. Is there a way of forwarding client DHCP broadcasts to the 
192.168.2.0/24 DHCP server, so that only one DHCP server needs to be 
maintained?

Cheers,
Raimund