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Re: mech-v2-05pre
(you accidentally sent this to IPv6 WG list, I corrected the Cc:)
On Wed, 25 Aug 2004, Radhakrishnan Suryanarayanan wrote:
> I need some clarification on this:
>
> 3.2. Tunnel MTU and Fragmentation
>
> Naively the encapsulator could view encapsulation as IPv6 using IPv4
> as a link layer with a very large MTU (65535-20 bytes to be exact; 20
> bytes "extra" are needed for the encapsulating IPv4 header
>
> --> Why do we mention 65535-20 bytes "exact"? Isnt it syntactically wrong?
> i feel it can be rephrased as :
> " as a link layer with a very large MTU (65535-20 bytes atmost; minimum of
> 20
> bytes "extra" are needed for the encapsulating IPv4 header without
> options)
OK, I'll change "exact" to "at most".
> ----- Original Message -----
> From: "Pekka Savola" <pekkas@netcore.fi>
> To: "Karen E. Nielsen (AH/TED)" <karen.e.nielsen@ericsson.com>
> Cc: "Alex Conta" <aconta@txc.com>; <v6ops@ops.ietf.org>
> Sent: Wednesday, August 25, 2004 1:33 PM
> Subject: RE: mech-v2-05pre
>
>
> > On Wed, 25 Aug 2004, Karen E. Nielsen (AH/TED) wrote:
> > > Wrt the definition of the point-to-point link concept for IPv6 - then
> > > RFC 2461, Section 2.2, states:
> > >
> > > "point-to-point - a link that connects exactly two interfaces. A
> > > point-to-point link is assumed to have multicast
> > > capability and have a link-local address."
> > >
> > > When using the term "point-to-point links" in section 3.8 of mech-v2,
> > > I have always assumed the above definition to be the one referred to - ?
> >
> > Yes, that's how sect 3.8 uses Neighbor Discovery. I don't see a
> > conflict. The goal of that definition is to define point-to-point for
> > higher layers. We want to give a clear statement on what the
> > point-to-point is from the perspective of the lower layers.
> >
> > The quote says p2p connects two interfaces. That's OK, but that
> > refers (in this case) to the logical IPv6 tunnel interfaces, not the
> > physical underlying interfaces which are not necessarily even
> > IPv6-capable.
> >
> > What we want to say is that the v6 link is a virtual point-to-point as
> > defined in above, and the lower layer endpoints of that p2p link are
> > the v4 addresses which are configured on the endpoint nodes' physical
> > interfaces. [and specifically, the lower layer endpoints aren't just
> > any addresses on the endpoint nodes, rather the specific v4 addresses]
> >
> > But that seems way too confusing way to put it, so just saying
> > "virtual p2p between v4 addresses" seems shorter and sufficiently
> > clear.
> >
> > --
> > Pekka Savola "You each name yourselves king, yet the
> > Netcore Oy kingdom bleeds."
> > Systems. Networks. Security. -- George R.R. Martin: A Clash of Kings
> >
> >
> >
>
--
Pekka Savola "You each name yourselves king, yet the
Netcore Oy kingdom bleeds."
Systems. Networks. Security. -- George R.R. Martin: A Clash of Kings