Re: [DNA] [Issue X] LinkID v.s. Landmark Prefix

[JinHyeock Choi <jinchoe@gmail.com>]

Dear Tero

> > Assume a link with two routers R1 and R2 and a host H.
> > R1 advertises Prefix1 and R2 Prefix2.
> >
> > R2 stops advertising Prefix2 and starts advertising Prefix3.
> > R2 announces the prefix change by sending an RA but
> > both R1 and H don't receive it.
> >
> > Then H happens to change its AP in the same link
> > and send an RS with landmark Prefix2. It also happens that
> > R2 replies first and sends an RA with NO and Prefix3.
> > H falsely assumes a link change.
> 
> But isn't it actually so that in this case the host shouldn't use an
> address based on Prefix2 and thus reconfiguration is required (i.e. link
> change from host H point of view)? After all, Prefix2 is not anymore
> valid.

Host may also have an address with Prefix1. While the address with
Prefix1 is valid, the host will throw it away because it thinks it is at 
a different link. 

Best Regards

JinHyeock