RE: RFC 2893-style automatic tunneling

[Pekka Savola <pekkas@netcore.fi>]

On Tue, 26 Aug 2003, Tony Hain wrote:
> In fact I just had to deal with a customer asking about automated tunneling
> of IPv4 over an IPv6-only network in the last couple of weeks. At this point
> I am not sure if 2893 is the only way to solve the problem, but it is at
> least one way. While it is creates some routing issues if used in the
> greater Internet, it may have applicability in some closed configurations
> without a massive number of routes. It would be premature to deprecate it at
> this time.

Having to use automatic tunneling over IPv6-only network would seem to
suggest a failure to consider dual-stack.   Or if the need for tunnels is 
not high, manual tunnels and a routing protocol could also suffice.

The automatic tunneling in its present form is simply too flawed (in
particular, the security considerations was never well defined), and has
to go.

> > -----Original Message-----
> > From: owner-v6ops@ops.ietf.org 
> > [mailto:owner-v6ops@ops.ietf.org] On Behalf Of Fred Templin
> > Sent: Tuesday, August 26, 2003 1:09 PM
> > To: Fred Templin
> > Cc: v6ops@ops.ietf.org
> > Subject: Re: RFC 2893-style automatic tunneling
> > 
> > 
> > There was no answer to my question on RFC 2893-style 
> > automatic tunneling, so I take this as a possible indication 
> > that no one is still using this 
> > mechanism.
> > 
> > Should we move to deprecate, then? If so, what form should the 
> > deprecation take?
> > 
> > Thanks - Fred
> > ftemplin@iprg.nokia.com
> > 
> > Fred Templin wrote:
> > 
> > > Is RFC 2893-style automatic tunneling (i.e., with 
> > IPv4-compatible IPv6
> > > addresses)
> > > used in any active deployments? It seems to me that the 
> > functionality 
> > > is obsoleted
> > > by newer automatic tunneling mechanisms (e.g., 6to4, 
> > isatap, etc.) but 
> > > I'd like to
> > > hear from those with more current operational experience.
> > >
> > > Thanks  - Fred
> > > ftemplin@iprg.nokia.com
> > 
> > 
> > 
> > 
> 
> 

-- 
Pekka Savola                 "You each name yourselves king, yet the
Netcore Oy                    kingdom bleeds."
Systems. Networks. Security. -- George R.R. Martin: A Clash of Kings