http://www.bbc.co.uk/news/world-europe-32787342
I see the big idea is to seek and destroy the vessels being used to convey migrants and that will require the co-operation of various Libyan militias in order to disrupt the traffickers.
Given that they'll need to ensure these vessels are empty and not legitimate fishing (or other) boats, I can't see this being a very practical option even if it gets UN approval which the Russians are unlikely to allow in any event.