Novel scheme for efficient and scalable multihoming support in IPv6

Abstract

The typical motivation for multihoming is to improve reliability and performance. However, being multihomed is intrinsically complicated. Specially, the fundamental to IPv6 is the concept of firm route aggregation, by which that TLA (top level aggregator) will need to announce the aggregate of their space only to other TLA peers. Due to above reason, it requires a fair of amount of thought and careful configuration to deploy multihoming in IPv6. In this paper, we propose a new efficient and scalable multihoming scheme, which is to target for solving the technical and potential problem of multihoming support at the site exit router (RFC 2260). Multihoming supporting at the site exit uses tunneling between the border router of the ISP and the site exit router during link-failure. However, this tunneling may not be established where there do not exist contracts for traffic between ISPs. So, the key feature of our scheme is to establish a tunneling section directly between the site exit router at the multihomed site and the border router of the source site. Though additional functionalities must be included on the border router under our scheme, the proposed scheme not only has better adaptability but also can perform limited load sharing.