Martian
Click on the red underlined text to get to the source
... situations: a packet is dropped if there is no route at all, such as
to "Martian addresses" or addresses that are not currently routed,
...
... packets from its upstream providers, to get rid of packets with
"Martian" or other non-routed addresses.
...
... Of course, this mechanism would only show if the source addresses
used are "martian" or other unrouted addresses -- not if they are
from someone else's address space ...
... Therefore, the use of Loose RPF cannot be recommended, except as a
way to measure whether "martian" or other unrouted addresses are
being used.
...
... RPF primarily filters out unrouted prefixes such as Martian
addresses. It can be applied in the upstream ...