The Locator/Identifier Separation Protocol (LISP) was specified a few years ago by the Internet Engineering Task Force (IETF) to enhance the Internet architecture with novel inbound control capabilities. Such capabilities are particularly needed for multihomed networks that dispose of multiple public IP routing locators for their IP networks, and that are willing to exploit them in a better way than what possible with the legacy Border Gateway Protocol (BGP) [8]. In this work, we specify how to enhance the LISP routing system to perform egress control too. Our goal is to give the highest possible routing optimization degree to LISP networks, so that ingress and egress traffic engineering strategies can be jointly performed, without requiring coordination between LISP and BGP. We design the enhancement to the LISP router system, specify the required protocol extensions, open sourcing the code and proving the overhead and the achievable gains by experimentation.