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

[神明達哉 <[e-mail]>]

At Thu, 11 Feb 2016 08:30:11 +1300,
Brian E Carpenter <[e-mail]> wrote:

> >>> 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",
> >>
> >> Actually, only the router lifetime field indicates that the RA is
> >> coming from a default router or not.
> >
> > Right, and "this" in "this is your default router" is actually (or
> > more accurately) the source IPv6 address of the Router Advertisement,
> > rather than something "contained" in it (as an option).  So the above
> > suggested text could still sound a bit awkward, but to me it seemed
> > just good enough and trying to make it super accurate wouldn't be
> > worth the resulting verbosity.  If you want to make it perfect,
> > though, I'm not opposed to it - feel free to suggest your own text.
>
> It is tricky to make this text perfect, because the phrase "default router"
> is a little bit strange. Logically, there can only be one default at a given
> instant, but we have the concept of a list of "defaults", which really
> means a list of valid routers in the absence of a specific route for
> the destination address. Or maybe "a default router" is a router that
> claims to be able to route to any destination, but "the default router"
> is the router the host is currently using in the absence of a specific
> route.

To be clear, I don't think my suggestion is about making text of
"default router" perfect.  I just tried to correct the obvious error
of referring to the default router list as content of RA, and adjust
the rest of the paragraph accordingly.

--
JINMEI, Tatuya