Implementation of an IPv6 Multihoming Ingress Filtering Compatibility Mechanism Using Automatic Tunnels.

Nowadays, many organizations need to be multihomed in order to achieve fault tolerant Internet access. Unfortunately, the hierarchical nature of IPv6 addressing architecture poses some threats on multihoming. The IETF is designing a solution based on the discussion of several approaches to solve the problem. Ingress filters are part of the problem, so ingress filtering compatibility mechanisms are needed. This paper discusses the host-centric multihoming approach and describes an implementation of an ingress filtering compatibility mechanism based on automatic tunnels and anycast addresses. The implementation has proven to work properly, being easily developed and deployed.