Problems setting up second LAN Interface

[indgepr]

I have installed Version24.7.5 with a single WAN and LAN interface and it is working fine. the machine that it is installed on has a second set of interfaces (SFP+) that I decided to use for a higher speed connection for the kids gaming computors.

I created a new interface LAN2 (Static IP set to x.x.x.2 LAN static IP x.x.x.1 and enabled it, looked ok seemed to be working, I then enables the DHCP on LAN2 and updated the DHCP for LAN & LAN2 with different ranges (LAN x.x.x.10 to x.x.x.110 and LAN2 x.x.x.111 to x.x.x.210).

This resulted in all the connected devises when their DHCP lease expired being given a new IP adress in the 111 to 210 range and the gateway x.x.x.2 irrespetive of what port they were physically connected to. As there were no Firewall rules for LAN2 this led them to being disconnected

What have I done wrong ? is this the best way to setup 2 Lan interfaces or was I trying to do something fundementally wrong ?

Thanks

[Patrick M. Hausen]

You cannot have x.x.x.*/24 on two interfaces at the same time. You need to pick a different x.x.x for LAN2.

Like 192.168.1.* for LAN and 192.168.2.* for LAN2.

[meyergru]

Yup. Try reading this.

[cookiemonster]

And there is no security risk in sharing the private network but makes it clearer to anyone trying to work out the problem.
Mine are:
LAN1: 192.168.5.0/24
LAN2: 192.168.6.0/24
there are more but you get the idea.