On Tue, Oct 28, 2014 at 11:55:57AM +0100, Martin Pieuchot wrote: > There's nothing that prevent you to configure the same IPv4 address on > different interfaces in the same routing domain. But does it make > sense?
Yes, it does make sense. I abuse this feature to get unnumbered point-to-point links. > Index: netinet/in.c > =================================================================== > RCS file: /home/ncvs/src/sys/netinet/in.c,v > retrieving revision 1.106 > diff -u -p -r1.106 in.c > --- netinet/in.c 7 Oct 2014 08:47:28 -0000 1.106 > +++ netinet/in.c 28 Oct 2014 10:23:07 -0000 > @@ -616,6 +616,10 @@ in_ifinit(struct ifnet *ifp, struct in_i > > splsoftassert(IPL_SOFTNET); > > + /* Make sure this address does not exist in the given rdomain. */ > + if (ifa_ifwithaddr(sintosa(sin), ifp->if_rdomain)) > + return (EEXIST); > + > if (newaddr) > TAILQ_INSERT_TAIL(&in_ifaddr, ia, ia_list); > > -- :wq Claudio
