How to extend IP Range from 192.168.1.1 to 192.168.2.254

Solution 1:

This is going to be slightly tricky if you're intending to treati this as one big subnet, because 192.168.1.0 to 192.168.2.255 isn't correctly aligned on the right boundary for a /23 subnet, so you can't treat it as 192.168.1.0/23.

If you're completely set on using specifically 192.168.1 and 192.168.2 then you'd need to use a subnet of 192.168.0/22, which is actually the range from 192.168.0.0 to 192.168.3.255. Mostly that just means changing the subnet mask on your whole network to 255.255.252.0

However once you've done that your DHCP server should be perfectly happy serving IPs from the continuous range 192.168.1.100 to 192.168.2.254.

Solution 2:

Don't know for IPCop, but Microsoft DHCP scopes can be larger as you want; you can't resize them, though, so if you want a bigger scope you need to drop the existing one and re-create it.