Forgot output for a problem container
rock@rockpi4a:~$ lxc exec postgresql /bin/ash
~ # ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1
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
4: eth0@if5: <BROADCAST,MULTICAST,UP,LOWER_UP,M-DOWN> mtu 1500 qdisc noqueue state UP qlen 1000
link/ether 00:16:3e:25:56:ef brd ff:ff:ff:ff:ff:ff
inet6 fe80::216:3eff:fe25:56ef/64 scope link
valid_lft forever preferred_lft forever
~ # ip r
~ #