Comment # 1 on bug 1202658 from Marius Tomaschewski

The static config is incorrect/incomplete and causes failure:

each route with a gateway requires a direct/device route without gateway
that is matching the gateway IP or the kernel will reject the gateway route.

When there is an IPADDR=10.1.1.x/24, the kernel will create a route (to
the 10.1.1.0/24 network and thus to the gateway) when the address is
applied, but when there is no IPADDR, a route to reach the gateway is
missing - fix:

$ cat /etc/sysconfig/network/ifroute-enps03
10.1.1.252  -          - enps03
10.2.1.1/32 10.1.1.252 - enps03 

See also:
https://github.com/openSUSE/wicked/wiki/FAQ/#q-why-wicked-does-not-set-my-default-static-route

*** This bug has been marked as a duplicate of bug 907495 ***