F20 network configuration

[Pasha R]

My PC is currently (I'm using F17) configured to connect to internet using
DSL (pppoe) over ethernet interface. I also configured same interface with
static IP address for local network. My computer acts as a router for the
local network. I used old system-config-network to create this
configuration and disabled NetworkManager. In  F20, it looks like using
NetworkManager is unavoidable. But whenever I connect to DSL, it
disconnects local network. Can I configure it to keep both networks over
same physical interface?
Also is it possible to connect to DSL automatically on startup even when no
user logged in?

Thanks.
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