This weekend I managed to induce what is now my favorite Cisco error message:
*Mar 2 00:35:32.645: %BGP-6-NEXTHOP: Invalid next hop (254.192.2.52) received from FEC0:234::3: martian next hop
In a computer network, packets with source addresses not routable by some computer on a network segment are referred to as martians or “packets from Mars”, on the grounds that they are of no evident “terrestrial” (i.e. normal) source.
Here are a couple of more of my favorite Cisco errors: