Mobility Impact on Session Survivability under the SHIM6 Protocol and Enhancement of its Rehoming Procedure

Multihoming is a solution that enables a faulttolerant access to the Internet by configuring on each network entity several IP addresses associated with distinct ISPs. IPv6 natively allows end-hosts and end-sites to be multihomed where nodes and routers can have multiple IP addresses. However, a specific support is required to take full advantage of multihoming. The SHIM6 protocol provides such a support. We study in this paper to what extent the mobility impacts the SHIM6 protocol component in general and more specifically the context establishment as it is a sine qua none condition for session survivability. We focus on possible consequences of mobility before, during, and after the context establishment. We find that in some mobility scenarios, the SHIM6 context is never established and the session survivability cannot be ensured.