I'm trying to connect my Raspberry Pi 3 model B to two different LAN networks at the same time. One is connected directly to the raspberry and otherr is connected to usb-ethernet adapter.
Both work by them selves correctly, I can acces e.g google through both of them. But when I attach both of them I cannot access the network connected to the adapter.
I found some instructions online on how to connect to two wifi networks, but these didnt really help.
In my network config file I have
auto eth0 iface eth0 inet manual
auto eth1 iface eth1 inet manual
Is there some setting to allow connection through both of them at the same time?
I need the secondary network(through adapter) only for pinging this network. The other is used to ping other network and for other things.
EDIT: To clarify the situation, I dont need internet access through either of them, but I do need to have access to two separate local networks. Both netwroks run with static IP addresses.
