I. Introduction
Nowadays, the inter-domain routing for MANETs draws more and more attention. The existing Border Gateway Protocol (BGP) is the de facto inter-domain routing protocol for the Internet. But BGP is not applicable to MANETs because BGP design is based on a static Internet, and cannot scale to mobile, dynamic topology environments. The challenges in wireless, mobile inter-domain routing include dynamic network topology, intermittent connectivity, membership management, and routing protocol heterogeneity.