[Bug 1735193] Re: Netplan does not support onlink gateway

[Waleed Hamra]

** Also affects: nplan (Ubuntu)
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1735193

Title:
  Netplan does not support onlink gateway

Status in netplan:
  New
Status in nplan package in Ubuntu:
  New

Bug description:
  There are cases where the gateway is not in the same subnet as the IP of the machine. The kernel will by default not allow adding such a route, unless some options are specified.
  For example, I could add such route using:

  sudo ip route add default via xxx.xxx.xxx.xxx dev ens3 onlink

  The onlink keyword skips the sanity check, the route gets added, and
  life is good.

  systemd-network does support this, with a keywork in its .network file
  called gatewayonlink, according to the systemd.network man page, but
  netplan provides no option for me to tell it I want this option.

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