[Bug 1872589] Re: systemd-networkd is not honoring UseRoutes=false

[Rafael David Tinoco]

*** This bug is a duplicate of bug 1867375 ***
    https://bugs.launchpad.net/bugs/1867375

I'm marking this as a duplicate of your bug then...

** This bug has been marked a duplicate of bug 1867375
   systemd-networkd: Setting UseRoutes to False results in DHCP default gateway not being installed

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https://bugs.launchpad.net/bugs/1872589

Title:
  systemd-networkd is not honoring UseRoutes=false

Status in systemd package in Ubuntu:
  Triaged

Bug description:
  When netplan configures dhcp4-overrides and set "use-routes" to false,
  systemd-networkd should be configured with UseRoutes=false. It is.
  Unfortunately looks like systemd-networkd is not honoring it and
  configuring the default gateways for the interfaces no matter what.

  Ubuntu Focal: systemd: 245.4-2ubuntu1

  ----

  $ sudo cat /etc/netplan/50-cloud-init.yaml
  network:
      ethernets:
          enp5s0:
              match:
                  macaddress: 00:16:3e:af:c4:d6
              set-name: eth0
              dhcp4: true
              dhcp-identifier: mac
          enp6s0:
              match:
                  macaddress: 00:16:3e:50:11:9c
              set-name: iscsi01
              dhcp4: true
              dhcp-identifier: mac
              dhcp4-overrides:
                use-routes: false
          enp7s0:
              match:
                  macaddress: 00:16:3e:b3:cc:50
              set-name: iscsi02
              dhcp4: true
              dhcp-identifier: mac
              dhcp4-overrides:
                use-routes: false
      version: 2
      renderer: networkd

  ----

  $ cat /var/run/systemd/network/10-netplan-enp6s0.network

  [Match]
  MACAddress=00:16:3e:50:11:9c
  Name=iscsi01

  [Network]
  DHCP=ipv4
  LinkLocalAddressing=ipv6

  [DHCP]
  ClientIdentifier=mac
  RouteMetric=100
  UseMTU=true
  UseRoutes=false

  --

  $ ip route show | grep default
  default via 10.250.93.1 dev iscsi02 proto dhcp src 10.250.93.101 metric 100
  default via 10.250.94.1 dev iscsi01 proto dhcp src 10.250.94.167 metric 100
  default via 10.250.97.1 dev eth0 proto dhcp src 10.250.97.123 metric 100

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