I added my wireless first with a default route of my internet router. Then I added my hard wired lan with no default route as stated above. This didnt quite do the trick. I have a lab setup with 2 networks that I use for study. I still was trapped in internet land......
>route add 192.168.2.0/24 192.168.1.200 metric 2
that got me to be able to hit my devices. 192.168.1.200 is a 2611xm router and my switches are attached to the back end of that (192.168.2.0).
the dhcp range doesnt matter much since it works like a stack.. you know how many addresses it uses and what you can use..... other then that dhcp WILL not even become a topic of discussion.... I would however work around dhcp if possible, but it is not a factor that will make or break project.