Hi. I did som further investigation here, and I think I've figured out
what happens in networkd here.
Aug 21 10:54:45 nettest1 systemd-networkd[5463]: ens3: Removing address:
2001:700:1d00:ec00:5054:ff:fe49:4bc9/64 (valid for 4w 2d)
Aug 21 10:54:46 nettest1 systemd-networkd[5463]: ens3: Removing address:
10.212.128.84/24 (valid for 11h 57min 54s)
Aug 21 10:54:46 nettest1 systemd-networkd[5463]: Sent message type=signal
sender=n/a destination=n/a path=/org/freedesktop/network1/link/_32
interface=org.freedesktop.DBus.Properties member=PropertiesChanged cookie=17
reply_cookie=0 signature=sa{sv}as error-name=n/a error-message=n/a
Aug 21 10:54:46 nettest1 systemd-networkd[5463]: Sent message type=signal
sender=n/a destination=n/a path=/org/freedesktop/network1
interface=org.freedesktop.DBus.Properties member=PropertiesChanged cookie=18
reply_cookie=0 signature=sa{sv}as error-name=n/a error-message=n/a
Aug 21 10:54:46 nettest1 systemd-networkd[5463]: ens3: Routing policy rule
configured
Aug 21 10:54:46 nettest1 systemd-networkd[5463]: ens3: Could not set route:
Network is unreachable
Aug 21 10:54:46 nettest1 systemd-networkd[5463]: ens3: Routes set
Aug 21 10:54:46 nettest1 systemd-networkd[5463]: ens3: Adding address:
10.212.128.84/24 (valid for 12h)
Aug 21 10:54:46 nettest1 systemd-networkd[5463]: Sent message type=signal
sender=n/a destination=n/a path=/org/freedesktop/network1/link/_32
interface=org.freedesktop.DBus.Properties member=PropertiesChanged cookie=19
reply_cookie=0 signature=sa{sv}as error-name=n/a error-message=n/a
Aug 21 10:54:46 nettest1 systemd-networkd[5463]: Sent message type=signal
sender=n/a destination=n/a path=/org/freedesktop/network1
interface=org.freedesktop.DBus.Properties member=PropertiesChanged cookie=20
reply_cookie=0 signature=sa{sv}as error-name=n/a error-message=n/a
Aug 21 10:54:46 nettest1 systemd-networkd[5463]: ens3: Configured
Basically it seems like networkd does the following on "netplan apply":
1) Remove every address
2) Add routes - which of course will fail with "network is unreachable" because
the interfaces don't have an address yet
3) Adding the addresses
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https://bugs.launchpad.net/bugs/1836695
Title:
Netplan ignores static routes when using DHCP
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