Re: I-D Action:draft-vandevelde-v6ops-harmful-tunnels-01.txt

[Gert Doering <gert@space.net>]

Hi,

On Wed, Sep 01, 2010 at 10:22:15AM +1200, Brian E Carpenter wrote:
> Some positive proposals for how to correct these failure modes would
> be more productive than a "considered harmful" conclusion, too.
> 6to4 exists to bypass IPv4-only ISPs; 

This model seems to assume that end users see value in deploying IPv6
if they have enough IPv4 addresses.

Looking around, I can see a few end users for those this is true - but
those can help themselves with configured tunnels.

For the large mass of end users, they don't seem to see a benefit in
deploying IPv6 while their IPv4 internet is still working - so I doubt
that the originally-envisioned usage case of 6to4-with-anycast (3068)
really does anything good these days, while it definitely does harm, as 
there *are* overloaded/badly managed anycast relays out there, and they
won't go away any time soon.

(You want operator input - here's operator input:  use IPv6 in a fully
managed and controlled way[*], or stick to IPv4.)

[*] 6rd is something I have no issues with it - it's no better or worse 
than 6PE MPLS tunneling "the ISP manages this for his customers and there 
is a well-defined point of contact to make it work if something is broken".

Gert Doering
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