IP Fast ReRoute: Lightweight Not-Via without Additional Addresses

In order for IP to become a full-fledged carrier- grade transport technology, a native IP failure-recovery scheme is necessary that can correct failures in the order of milliseconds. IP fast reroute (IPFRR) intends to fill this gap, providing fast, local and proactive handling of failures right in the IP layer. Building on experiences and extensive measurement results collected with a prototype implementation of the prevailing IPFRR technique, Not-via, in this paper we identify high address management burden and computational complexity as the major causes of why commercial IPFRR deployment still lags behind, and we present a lightweight not-via scheme, which, according to our measurements, improves these issues.