Martian addresses are host or network addresses about which all routing information is ignored. They commonly are sent by improperly configured systems on the network and have destination addresses that are obviously invalid.
In IPv4, the following are the default martian addresses:
In IPv6, the loopback address, the reserved and unassigned prefixes from RFC 2373, and the link-local unicast prefix are the default martian addresses.
The following sections explain how to configure martian routes: