Troubleshooting discoveryEdit online You can troubleshoot discovery by monitoring discovery events and by running discovery reports. You can also configure your own discovery events. Troubleshooting discovery with reportsThe troubleshooting reports provide easy visibility into the discovery results to help with verification and troubleshooting of both the discovery results and the network itself.Monitoring discovery statusYou can view discovery status messages to understand the status and progress of the discovery. You can also configure your own discovery events.Troubleshooting discovery agentsYou can use the Discovery Status GUI to troubleshoot discovery problems associated with discovery agents.Troubleshooting missing devicesIf a device that you expect to find in your network topology is not present, follow these steps to troubleshoot the problem.Troubleshooting an idle discoveryIf you start the discovery, and after some minutes no devices have been discovered, follow these troubleshooting steps.Repairing a corrupted discoveryIf the discovery stops in an unusual way, for example, if the ncp_disco process is stopped forcibly from the command line, or exits unexpectedly, you might need to repair the discovery before running another discovery.Removing discovery cache filesRemove discovery cache files to perform a new, clean discovery.Troubleshooting illegal charactersIf you see an error message about illegal characters in insert statements into the topology database, follow these steps to troubleshoot the problem.Parent topic: Discovering the networkRelated tasksTroubleshooting Network Manager