I'd sure be interested in hearing what others in the WG think on this issue.
> > The solution you want in this space is something which allows plug&play of > > the devices that glue together the stacking. And since you don't know how > > the customer will plug things together, I think you must deal with loops. > > I have a fundamental disagreement with this. Any scenario where you > would plug these in any other mode than in series should be strictly > out of scope. IMHO, we don't want to deal with that. > If the user plugs three ND-proxies in a triangle or two (or > more) ND-proxies in a loop, the everything breaks -- and the customer > fixes the set-up or calls someone to fix it. Immediate failure, > immediate fix. I see no problem with this. As it is, ND-proxy should > never be enabled by default in any case. Pekka, elsewhere (in a mail on v6ops) you stated the concern that IPv6 might end up with consumer-class "routers" (devices that sit between different types of L2) that do v6-to-v6 NAT because that would be more plug and play than the alternatives hence we need an alternative like ndproxy (at least I think you made that argument). Saying that ndproxy needs to be manually enabled and can't be enabled by default doesn't match this concern. I also don't see how one can prevent consumers from connecting such devices in ways that form loops. It *might* be sufficient if the solution could detect loops and sound the alarm (and stop forwarding frames), but ndproxy can't even detect loops and shut itself off. Thus when loops are formed the result is that the consumer will see their network die (100% link utilization due to frames looping around forever; ndproxy doesn't decrement the hop count). This doesn't satisfy what I think you say you want to solution to do. Erik -------------------------------------------------------------------- IETF IPv6 working group mailing list [EMAIL PROTECTED] Administrative Requests: https://www1.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
