[c-nsp] Blackholing looped traffic

[Everton da Silva Marques]

I'm looking for a command like this:

interface Serial0
 ip drop incoming looped packets

The command would discard incoming packets
which would otherwise be forwarded back to
the same incoming interface.

The function could be implemented with ACLs,
but it would be better to have a mechanism
more automatic, more manageable, relying on
CEF, just like the one provided by uRPF (ip
verify unicast reverse-path).

Is there such a command?

Thanks,
Everton