Re: 6MAN WG Last Call - draft-ietf-6man-multi-homed-host-03.txt

[神明達哉 <[e-mail]>]

At Sat, 6 Feb 2016 08:22:28 +1300,
Brian E Carpenter <[e-mail]> wrote:

> >>>   I'm not sure if I can understand the "or a Default Router List"
> >>>   part.  If it means 'Router Advertisement may contain...a Default
> >>>   Router List', it doesn't make sense since an RA (or any of its
> >>>   options) doesn't contain such a list (Default Router List is
> >>>   something that a host maintains based on the content of RA).
> >>
> >> I think you're correct.
> >
> > Then I guess the sentence will have to be revised, but I can't suggest
> > anything specific as I don't understand the original intent.  Does
> > this "Default Router List" perhaps actually means the source IPv6
> > address of the RA (which will be maintained in the Default Router List
> > of the receiving host)?
>
> I think we should simply delete ", or a Default Router List". That list
> is created and maintained by the host, as you say.

Okay, then my personal suggestion for the entire paragraph would be:

   As described in [RFC4191] and [RFC4861], a Router Advertisement may
   contain zero or more Prefix information Options (PIOs), or zero or more
   Route Information Options (RIOs).  In their
   original intent, these indicate general information to a host: "this
   is your default router", "you might create an address in this
   prefix", or "this router would be a good place to
   send traffic directed to a given destination prefix".  In a multi-
   homed network implementing source/destination routing, the
   interpretation of default router or an RIO has to be modified
   with the words "if the source address is in one of the prefixes I
   advertise in a PIO".  Additionally, the PIO must be reinterpreted to
   also imply that the advertising router would be a reasonable first
   hop for any packet using a source address in any advertised prefix.

--
JINMEI, Tatuya