Exploring Router Failover Mechanisms and Potential Pitfalls

This chapter delves into the challenges and risks associated with implementing failover mechanisms for routers in business and home environments. It covers various scenarios where redundant routers and technologies like CARP, CoroSync, Pacemaker, ZFS failover, and virtualization can introduce unexpected issues such as data corruption, TCP state discrepancies, and network routing problems, emphasizing the critical need for meticulous configuration and monitoring to prevent costly complications.