Connectivity issues can often be attributed to routing protocol misconfiguration or misbehavior. However, due to the complexity involved in identifying the cause, this tool does not attempt to resolve such cases.
Instead, it focuses on low-complexity connectivity issues, which are usually routing protocol independent. If you are interested in troubleshooting routing protocol independent connectivity issues, rerun your query without any information on routing protocol.
To resolve routing protocol-specific connectivity issues, refer to these documents: