My rutx09 is connected via the wan port to my gateway and I created 2 network: 192.168.1.1/24 and 192.168.2.1/24, my laptop is connected to the first network. When I log into the device I see this:
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
link/ether 00:1e:42:25:60:04 brd ff:ff:ff:ff:ff:ff
inet 192.168.1.1/24 brd 192.168.1.255 scope global eth0
valid_lft forever preferred_lft forever
inet6 fd28:bd1e:80be::1/60 scope global noprefixroute
valid_lft forever preferred_lft forever
inet6 fe80::21e:42ff:fe25:6004/64 scope link
valid_lft forever preferred_lft forever
3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
link/ether 00:1e:42:25:60:05 brd ff:ff:ff:ff:ff:ff
inet 192.168.2.1/24 brd 192.168.2.255 scope global eth1
valid_lft forever preferred_lft forever
inet 192.168.7.114/24 brd 192.168.7.255 scope global eth1
valid_lft forever preferred_lft forever
inet6 fe80::21e:42ff:fe25:6005/64 scope link
valid_lft forever preferred_lft forever
Why on eth1 there is my second network and the address assigned from my gateway to the rutx09? Is it possible to decouple the 2? Also why I see only 3 eth ports, there should be 3 at least.
Regarding your setup, eth1 is the physical wired WAN Ethernet interface, which is why it has both the IP address you assigned (192.168.2.1/24) and the IP address provided by your gateway (192.168.7.114/24) in the WAN settings. eth0, on the other hand, is the physical LAN interface associated with all LAN ports and bridged into br-lan (192.168.1.1/24).
It’s not possible to decouple these interfaces since eth0 and eth1 are separate network interfaces (LAN and WAN). Physical LAN ports are all associated with the eth0 network interface, while eth1 is used for the wired WAN connection.
I understand that, but if I want to create another lan not a br-lan I should be able to do that because I have 4 ports: 1 for wan and the other 3 should be configurable as separate lan (not vlan) or am I missing something? So I expect to be able for instance to do at least from the ui interface:
On the RUTX09, separate LANs can be created using the eth0.3 or eth0.4 physical interfaces, but this can only be achieved by setting up VLANs based on the ports for which you want to assign a different network.
For detailed instructions on how to set up VLANs, please refer to this guide: VLAN Set Up.
I hope this helps! If you have any further questions, feel free to reach out.