Routing Troubleshooting and Verification Questions

Focuses on diagnosing network routing problems and verifying route configurations and packet forwarding behavior. Topics include examining routing tables, validating static routes, understanding routing protocol behavior and metrics, tracing path of packets using traceroute and similar tools, using show commands to inspect route propagation and interface state, identifying misconfigurations and route leaks, and reasoning about how routing decisions affect reachability. Candidates should be able to form hypotheses about why packets are not reaching destinations, apply systematic testing steps, and propose corrective actions or configuration changes.