With the growing number of proposed clean-slate redesigns of the Internet, the need for a medium that enables all stake-holders to participate in the realization, evaluation, and se-lection of these designs is increasing. We believe that the missing catalyst is a meta network architecture that wel-comes most, if not all, clean-state designs on a level playing field, lowers deployment barriers, and leaves the final evalu-ation to the broader community. This paper presents Linux XIA, a native implementation of XIA [12] in the Linux ker-nel, as a candidate. We first describe Linux XIA in terms of its architectural realizations and algorithmic contributions. We then demonstrate how to port several distinct and un-related network architectures onto Linux XIA. Finally, we provide a hybrid evaluation of Linux XIA at three levels of abstraction in terms of its ability to: evolve and foster in-teroperation of new architectures, embed disparate architec-tures inside the implementation’s framework, and maintain a comparable forwarding performance to that of the legacy TCP/IP implementation. Given this evaluation, we substan-tiate a previously unsupported claim of XIA: that it readily supports and enables network evolution, collaboration, and interoperability — traits we view as central to the success of any future Internet architecture. 1.