I have static IPs that are reserved from 192.168.0.100-600. I'd like to start the dynamic leases at 800. I thought this would be as simple as changing option start, but after changing /etc/config/dhcp below and rebooting the router, dynamic IPs are still being assigned in the 100 range.
Yes. An IPv4 is actually made up of 4 sets of 8 binary digits, these are then converted into decimal as it's easier for us to deal with. But this means each part of the address can be between 0 and 255. You can't have an address using any number outside that range.
It all depends on what your network setup is. I'm guessing you don't have much experience of subnetting?
Oh. Yes little experience. So it's not possible to setup 192.168.1.1xx for DHCP and then 192.168.1.8xx for static IPs? I'm trying to avoid the situation where my static IPs are assigned in the same range that my dynamic IPs are set.
I also want to be able to access my other routers when I login to them via VPN. So I put them on a different subnet 192.168.2.1, etc.
No, but do you have that many devices to connect? For many small networks having the first 98 addresses (i.e. 192.168.x.1 - 192.168.x.99) for static devices and then the remaining addresses (192.168.x.100 - 192.168.x.254) as DHCP is likely to be sufficient. I believe such a setup is pretty much how it defaults in OpenWRT.