>> The Correct Solution(tm) for this entire problem (IMHO) is for Pekka to >> make sure that the gateway box for the client PC's throws an unreachable >> error back to the hosts when it realises it can't forward it out to the >> Internet. The client boxes should detect the unreachable and give up >> immediately and fall back to IPv4. >> > > as mentioned to Remi my understanding is that the routability of the > ULAs can be extended beyond the local site using agreements, so probably > this approach would not support this case (maybe it is not a big problem > though...)
Well, it should not allow forwarding a packet out an interface that doesn't have a route back for that source, and should generate an Destination Unreachable error. I guess it's indeterminable by this host that it's peer doesn't have a route for this packet, however a system administrator should be able to do this on border routers where it applies. -------------------------------------------------------------------- IETF IPv6 working group mailing list ipv6@ietf.org Administrative Requests: https://www1.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
