On 18/12/2017 08:25, Brian E Carpenter wrote: ... >> In the figure 1 example in rfc4007, there is a link-local zone with >> two interfaces. > > Yes. Let's see what people have to say over on 6man. (The loop prevention > in GRASP will actually work for this case, as far as I can tell; it's > just a special case of a physical topology loop. I can probably simulate it > by plugging my Ethernet interface to the back of my wireless hub.)
I tested it. Indeed, the Windows stack sees this as two completely separate interfaces, with their own IPv6 addresses. There's nothing else it could do. (I didn't test it on Linux.) When I run GRASP, everything works as normal except that each Discovery and Flood message generates a diagnostic: "Dropping a looping relayed multicast." That's specified for Discovery at the top of this page: https://tools.ietf.org/html/draft-ietf-anima-grasp-15#page-19 ("To prevent loops,...") and for Flood in the middle of: https://tools.ietf.org/html/draft-ietf-anima-grasp-15#page-22 Brian _______________________________________________ Anima mailing list Anima@ietf.org https://www.ietf.org/mailman/listinfo/anima
