Preliminary Assessment of Using Spanning Tree Open Protocols in INA-CBT Communication System

The tsunami detection system on INA-CBT (Indonesia Cable Based Tsunameter) does not allow six minutes of downtime because it can affect the proper operation of the tsunami detection algorithm. The implementations of the INA-CBT at the Labuan Bajo and Rokatenda use a proprietary switching protocol for redundancy. In this work, simulation studies were carried out on the proposed model of INA-CBT network using open switching protocols for redundancy, spanning tree protocol (STP), and rapid spanning tree protocol (RSTP). Using open-protocols results in more flexible deployment in terms of device selection, thus reducing deployment costs. The simulation results show that failover takes 50 seconds of downtime on STP and 22 seconds on RSTP; that is, RSTP is 56% faster than STP. Moreover, failback results in 30 seconds of downtime on STP and 1 second on RSTP; that is, RSTP is 96.6% faster than STP. It indicates that open-protocol STP and RSTP still meet the INA-CBT’s requirements.