Multiple DHCP ranges same subnet?

Installing and Using OpenWrt
1

I have a situation where I need to be able to have 2 DHCP ranges. My predecessor (grumble) assigned static IPs in the middle of the scope. It's going to take a while to untangle that and in the mean time we're running out of IP space. The network is a /23 (also inherited). What I want to be able to do is hand out

10.10.10.26-199 and 10.10.11.1-250

My config currently is Start 26, Limit 173 and tacking on that second range is the question.

How does one do such a thing especially considering how does it know the next "Start" is in 10.10.11.x and not 10.10.10.x?

I tried creating a new interface using the same LAN bridge with IP 10.10.11.1/23 and with "force" enabled on both instances I get nothing.

2

I don't know of such an option using uci, but you could try this (ugly) workaround.

Create the first range in /etc/config/dhcp and check how it looks:

cat /tmp/etc/dnsmasq.conf* | grep dhcp-range

Then use it as a template for how to create the second range by inserting it into /etc/dnsmasq.conf, e.g.

dhcp-range=set:lan,10.10.11.1,10.10.11.250,255.255.254.0,12h

Restart the dnsmasq service and verify that both ranges are available.

logread -e dnsmasq-dhcp