Routing 192.168.0.0/16 into a 192.168.0.0/24 network
bill1234 last edited by
Routing from a 192.168.0.0/16 (LAN port, gateway at 192.168.1.1, DHCP from 192.168.1.100 to 192.168.255.254) into a WAN 192.168.0.0/24 gateway at 192.168.0.1, with other things connected at 192.168.0.2…
is it possible to go from a LAN port (lets say my ip is 192.168.1.100) to the "outside" at 192.168.0.2??? How? (can't touch the outside network config, and I need to have a 192.168.0.0 / 16 on the inside)
Not without specific routes for 192.168.0.0/24 on every device that's on 192.168.0.0/16. Even then I would consider the configuration, umm, creative.
In theory the longest subnet mask should win when routing decisions are made. I wouldn't expect every client device to behave properly, however.
Someone should renumber. I would start with the person who made the brilliant decision to use 192.168.0.0/16. No possibility of a routing collision there. Not with probably 10s of millions of networks on 192.168.0.0/24 or 192.168.1.0/24. And since it's all DHCP it should be relatively easy.
I guess it might also be possible to do a 1:1 NAT for the entire 192.168.0.0/24 network so, to your LAN, it appears as something that should be sent to the default gateway.
heper last edited by
even if you do, somehow, manage to get this working - it'll be a nightmare; if not now, then later.
bite the bitter pill and go to a sane subnetting scheme
my 2 cents