I have a RPi CM4 machine with 2 NICs. I want to be able to communicate with the main network on eth0 (192.168.1.x) and a separate network on eth1 (192.168.0.x).
For the main network connection, IT gave me 192.168.1.224, mask 255.255.254.0, Gateway 192.168.1.1. So that is how I set up eth0 (also tried 255.255.255.0 mask)
I set eth1 to 192.168.0.200. Didn’t set a mask or Gateway.
With no connection present on eth1, I can ping eth0 and ssh into it.
When I connect eth1, I can no longer ping or ssh.
I have no idea what I’m doing. I’m a total noob/beginner/dunce when it comes to networking.
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 e4:5f:01:dc:d3:ca brd ff:ff:ff:ff:ff:ff
inet 192.168.1.224/24 brd 192.168.1.255 scope global noprefixroute eth0
valid_lft forever preferred_lft forever
inet6 fe80::8b50:c7e0:6f8d:a2aa/64 scope link
valid_lft forever preferred_lft forever
3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 84:8b:cd:4a:a1:ee brd ff:ff:ff:ff:ff:ff
inet 192.168.0.251/24 brd 192.168.0.255 scope global noprefixroute eth1
valid_lft forever preferred_lft forever
inet6 fe80::7e0e:d55b:12a1:f029/64 scope link
valid_lft forever preferred_lft forever
4: wlan0: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast state DOWN group default qlen 1000
link/ether e4:5f:01:dc:d3:cc brd ff:ff:ff:ff:ff:ff
b4@raspberrypi:~ $ ip r
default via 192.168.1.1 dev eth0 src 192.168.1.224 metric 202
default via 192.168.0.1 dev eth1 src 192.168.0.251 metric 203
192.168.0.0/24 dev eth1 proto dhcp scope link src 192.168.0.251 metric 203
192.168.1.0/24 dev eth0 proto dhcp scope link src 192.168.1.224 metric 202
