Stabilizing Intelligent Route Control: Randomized Path Monitoring, Randomized Path Switching or History-Aware Path Switching?

Multihoming Intelligent Route Control (IRC) plays a significant role in improving the performance of Internet accesses. However, in a competitive environment, IRC systems may introduce persistent route oscillations, causing significant performance degradation. In this study, we investigate three design alternatives to cope with this issue: Randomized Path Monitoring, Randomized Path Switching and Historyaware Path Switching. The simulation results show that Randomized Path Monitoring is an effective alternative to Randomized Path switching when the sampling frequency is conservative. The results also indicate that the use of a sophisticated IRC algorithm, such as history-aware path switching, may not bring any benefit in terms of stability.