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

[Subba Reddy <subbareddy@samsung.com>]

Hi 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.

I think, host can not assume link change, if one of the prefixes is invalid.
In the case of link change, host deletes all its addresses, prefix table and
NC entries,
which is not the exact case if prefix changes.

In the above example, entries with Prefix1 are still valid.

Thanks & Regards,
Subba Reddy


>
> Tero
>
>
>