It was simple work for me. Company have AS52358 and router hardware but not have BGP full tables from peers (OMG!).
IT staff switched outgoing routes from one communication provider to another manually. 2015… again: OMG!….
I initiate, organize and made full BGP AS. Within a week the company got a complete stand-alone Internet zone. Of course, the stability of communication from/to the has increased greatly.