Router 2911 fail after power outage

[Robin Heeraman]

                   I recently copied a configuration from a router 2800 to a 2900. After a power outage no one can connect outside of the network through the new router. Before the outage all was fine. I put back the old router and all is fine which eliminates any cable or switch error. I have the router totally disconnect. I notice the configuration is in place.  My question is there any diagnostics that I can run to see if there is any hardware failure. It seems to boot up fine.

Thanks in advance

[Leo Laohoo · Accepted solution]

Backup the config of the router and erase the config.

If the router works fine without any config, then put the config back in and observe.

One of my suspicion is someone's changed the config but didn't save the config.