Subnet      2001:19f0:6:2::/64
Gateway     2001:19f0:6::1
Nameserver  2001:4860:4860::8888
Nameserver  2001:4860:4860::8844

Interface:       ens3
OS:              Ubuntu 18.04.02
Systemd version: 237

[Match]
Name=ens3

[Network]
Address=209.222.17.197/26
Gateway=209.222.17.193
DNS=8.8.8.8

[Network]
Address=2001:19f0:6:2::1337/64

[Route]
Destination=2001:19f0:6::1

[Match]
Name=ens3

[Network]
Address=209.222.17.197/26
Gateway=209.222.17.193
DNS=8.8.8.8

[Network]
Address=2001:19f0:6:2::1337/64

[Route]
Destination=2001:19f0:6::1

[Route]
Gateway=2001:19f0:6::1
GatewayOnlink=true

May 27 19:31:46 public-NY systemd-networkd[2452]: ens3: Could not set route: No route to host