Public bug reported:
I have an up-to-date Ubuntu 18.04 (bionic) server installation (with
systemd 237-3ubuntu10) which has following netplan configuration:
```
root@ubuntu:~# cat /etc/netplan/01-netcfg.yaml
# This file describes the network interfaces available on your system
# For more information, see netplan(5).
network:
version: 2
renderer: networkd
ethernets:
all:
match: {}
dhcp4: yes
root@ubuntu:~# cat /run/systemd/network/10-netplan-all.network
[Match]
[Network]
DHCP=ipv4
[DHCP]
UseMTU=true
RouteMetric=100
```
Despite having DHCPv4 configured, no IPv4 address is configured on the
ethernet device:
```
root@ubuntu:~# ip a show ens6
2: ens6: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 64000 qdisc fq_codel state UP
group default qlen 1000
link/ether 02:01:71:8f:cc:72 brd ff:ff:ff:ff:ff:ff
inet6 fe80::1:71ff:fe8f:cc72/64 scope link
valid_lft forever preferred_lft forever
```
The kernel dmesg has no related messages and the journal log also looks
normal:
```
root@ubuntu:~# journalctl -u systemd-networkd
Jul 02 16:36:51 ubuntu systemd[1]: Starting Network Service...
Jul 02 16:36:51 ubuntu systemd-networkd[1790]: ens6: Gained IPv6LL
Jul 02 16:36:51 ubuntu systemd-networkd[1790]: Enumeration completed
Jul 02 16:36:51 ubuntu systemd[1]: Started Network Service.
Jul 02 16:36:51 ubuntu systemd-networkd[1790]: lo: Link is not managed by us
Jul 02 16:36:51 ubuntu systemd-networkd[1790]: lo: Configured
```
Calling dhclient sets up the device correctly:
```
root@ubuntu:~# dhclient ens6
root@ubuntu:~# cat /var/lib/dhcp/dhclient.leases
lease {
interface "ens6";
fixed-address 87.106.172.36;
option subnet-mask 255.255.255.255;
option dhcp-lease-time 600;
option routers 87.106.172.1;
option dhcp-message-type 5;
option domain-name-servers 46.16.74.70,46.16.72.37;
option dhcp-server-identifier 87.106.172.1;
option interface-mtu 64000;
option host-name "ubuntu-18_04-fkb-2018-07-02";
renew 1 2018/07/02 16:46:51;
rebind 1 2018/07/02 16:51:31;
expire 1 2018/07/02 16:52:46;
}
root@ubuntu:~# ip a show ens6
2: ens6: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 64000 qdisc fq_codel state UP
group default qlen 1000
link/ether 02:01:71:8f:cc:72 brd ff:ff:ff:ff:ff:ff
inet 87.106.172.36/32 brd 87.106.172.36 scope global ens6
valid_lft forever preferred_lft forever
inet6 fe80::1:71ff:fe8f:cc72/64 scope link
valid_lft forever preferred_lft forever
```
** Affects: systemd (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1779721
Title:
systemd-networkd does not configure DHCPv4
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