I installed Ubuntu 17.10 with latest updates on a vmware virtual machine.
Netplan does not configure my 2 ethernets.
Here is my /etc/netplan/01-netcfg.yaml
network:
version: 2
renderer: networkd
ethernets:
lan:
match:
macaddress: 00:12:34:a8:29:e8
set-name: lan
dhcp4: false
dhcp6: false
accept-ra: false
addresses:
- 10.10.0.48/24
- 1701:5740:5000:3301::48/64
failover:
match:
macaddress: 00:45:57:89:27:e8
set-name: failover
dhcp4: false
dhcp6: false
accept-ra: false
addresses:
- 17.25.111.30/27
- 1701:5740:5000:3300::30/64
gateway4: 17.25.111.1
gateway6: 1701:5740:5000:3300::1
nameservers:
search:
- example.at
- intern.example.at
addresses:
- 10.10.0.1
- 1701:5740::66
I switched back to predictable devices like eth0, and after boot all devices are named properly, but not configured.
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: lan: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
link/ether 00:12:34:a8:29:e8 brd ff:ff:ff:ff:ff:ff
3: failover: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
link/ether 00:45:57:89:27:e8 brd ff:ff:ff:ff:ff:ff
After login and fireing systemctl restart systemd-networkd devices are configured. netplan apply also does the job.
I played so much around with systemd-networkd.service and systemd-networkd.timer but nothing helped.
It is quite frustrating set up the network manually after each reboot.
Does anyone know how to solve this?
Best Answer
I have exactly the same issue on Ubuntu 18.04, but R. Pietsch's solution doesn't solve it :(
I also tried to enable the root user, that it's disabled by default on Ubuntu, but no luck.
The only way I have to gain connectivity is to:
If I don't "sudo netplan apply", I have no connection on the machine. How is it possible to put into a LTS release such a broken piece of software?
I would like to add more details about my scenario, to be useful to other people to recognize the phenomena we are talking about. This is what it was happening in my case:
I think netplan is a good improvement compared to /etc/network/interfaces, but this behaviour should be fixed as soon as possible :)
UPDATE:
I debugged the issue using the following commands:
It seems it was the Network Manager panel in LXDE interfering with it. Even if the connections were displayed as "unmanaged", I un-checked the "Enable Networking" and it seems it fixed the issue.
We can close this one :)