I've also verified that bionic-updates fixes the described issue
root@bionic-test:/home/ubuntu# ip route
default via 172.16.0.1 dev ens3 proto dhcp metric 1024
172.16.0.0/24 dev ens3 proto kernel scope link src 172.16.0.50
root@bionic-test:/home/ubuntu# ip r
default via 172.16.0.1 dev ens3 proto dhcp metric 1024
172.16.0.0/24 dev ens3 proto kernel scope link src 172.16.0.50
root@bionic-test:/home/ubuntu# ip a
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: ens3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP
group default qlen 1000
link/ether 52:54:00:db:d8:6a brd ff:ff:ff:ff:ff:ff
inet 172.16.0.50/24 brd 172.16.0.255 scope global ens3
valid_lft forever preferred_lft forever
inet 172.16.0.24/24 brd 172.16.0.255 scope global secondary dynamic ens3
valid_lft 3468sec preferred_lft 3468sec
inet6 fe80::5054:ff:fedb:d86a/64 scope link
valid_lft forever preferred_lft forever
root@bionic-test:/home/ubuntu# ip r
default via 172.16.0.1 dev ens3 proto dhcp metric 1024
172.16.0.0/24 dev ens3 proto kernel scope link src 172.16.0.50
root@bionic-test:/home/ubuntu# ip a
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: ens3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP
group default qlen 1000
link/ether 52:54:00:db:d8:6a brd ff:ff:ff:ff:ff:ff
inet 172.16.0.50/24 brd 172.16.0.255 scope global ens3
valid_lft forever preferred_lft forever
inet 172.16.0.24/24 brd 172.16.0.255 scope global secondary dynamic ens3
valid_lft 3435sec preferred_lft 3435sec
inet6 fe80::5054:ff:fedb:d86a/64 scope link
valid_lft forever preferred_lft forever
3: ens7: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default
qlen 1000
link/ether 52:54:00:11:c6:5b brd ff:ff:ff:ff:ff:ff
root@bionic-test:/home/ubuntu# ip r
default via 172.16.0.1 dev ens3 proto dhcp src 172.16.0.24 metric 1024
172.16.0.0/24 dev ens3 proto kernel scope link src 172.16.0.50
root@bionic-test:/home/ubuntu#
** Tags removed: verification-needed verification-needed-bionic
verification-needed-disco
** Tags added: verification-done verification-done-bionic
verification-done-disco
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https://bugs.launchpad.net/bugs/1835581
Title:
networkd-dhcp4 does not set prefsrc for dhcp-provided classless or
static routes
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