Took some time ignoring AI SLOP and reading man pages and experimenting before finding the simplest and most reliable way to have the first ethernet be DHCP and also have a static address. Lots of bad examples, and good complex examples with bridges and other abstractions. Linux does this very well, just gotta figure out the newer NMCLI syntax.
#nmcli #cli #linux #embedded
/usr/bin/echo 1 > /proc/sys/net/ipv4/ip_forward
/usr/bin/nmcli con modify "Wired connection 2" connection.autoconnect yes
/usr/bin/nmcli device modify enP4p65s0 ipv4.method manual ipv4.addr "192.168.99.1/28"
/usr/bin/nmcli connection modify "Wired connection 1" +ipv4.addresses "192.168.99.17/28"
/usr/bin/nmcli connection up "Wired connection 1"
/usr/bin/ip addr
makes IP ADDR show:
; # ip addr 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 noprefixroute
valid_lft forever preferred_lft forever
2: enP4p65s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 56:83:3e:05:d8:5c brd ff:ff:ff:ff:ff:ff
inet 192.168.77.108/24 brd 192.168.77.255 scope global dynamic noprefixroute enP4p65s0 valid_lft 80625sec preferred_lft 80625sec
inet6 fe80::11ff:84be:ae53:54b9/64 scope link noprefixroute
valid_lft forever preferred_lft forever
3: enP2p33s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen1000
link/ether 4a:a1:e1:72:d9:e3 brd ff:ff:ff:ff:ff:ff
inet 192.168.101.1/24 brd 192.168.101.255 scope global noprefixroute enP2p33s0
valid_lft forever preferred_lft forever
inet6 fe80::d758:148a:ebb4:f2c3/64 scope link noprefixroute
valid_lft forever preferred_lft forever
4: tun0: <POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> mtu 750 qdisc pfifo_fast state UNKNOWN group default qlen 500
link/none
inet 10.9.0.201 peer 10.9.0.202/32 scope global tun0
valid_lft forever preferred_lft forever