Comment 4 for bug 1812117

And some more fun. We have to know the routes for all the interfaces. For example with the following configuration:

 {'version': 1, 'config': [{'type': 'physical', 'mtu': 1500, 'subnets': [{'type': 'static', 'netmask': '255.255.240.0', 'routes': [{'netmask': '0.0.0.0', 'network': '0.0.0.0', 'gateway': '51.68.80.1'}], 'address': '51.68.89.122', 'ipv4': True}], 'mac_address': 'fa:16:3e:25:b4:59', 'name': 'eth0'}, {'type': 'physical', 'mtu': 9000, 'subnets': [{'type': 'dhcp4'}], 'mac_address': 'fa:16:3e:b1:ca:29', 'name': 'eth1'}, {'type': 'nameserver', 'address': '213.186.33.99'}]}

We need to generate ifcfg-eth1 that contains:

DHCLIENT_SET_DEFAULT_ROUTE=no

in order to avoid the dhcpclient to set the default route based on the information received from the dhcp server on eth1.

I have a test case for this already. But I haven't figure out how to make it work as in sysconfig.py _render_subnets() does so on a per interface basis and thus there is no knowledge of the network topology.