Re: The IPv6 Transitional Preference Problem

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Martin,

On Jun 17, 2010, at 1:24 PM, Martin Rex wrote:
> I don't know what the broadbands for the average home users look
> like where you are, but here they're typically <= 640kBit/s upstream.

And?  How much bandwidth does a parallel connection use up?  Presumably if this felt to be a problem, kernels could cache what works and what doesn't.

>> much less anywhere near "close to a Denial of Service (DoS) attack".
> 
> If you look at hostnames such as hp.com which have 13 IPv4 listed in
> the DNS, it would probably have a significant effect on their
> infrastructure if suddenly every client would attempt 13 parallel
> TCP-connects and kill 12 of them pre-natal or during infancy.

I'd be surprised, as them even noticing would tend to indicate they'd be trivially susceptible to D(D)oS attacks.

However, I thought we were talking about doing parallel lookups/connects to an IPv6 address at the same time an IPv4 lookup/connect was done.  Don't see any particular point in opening parallel lookups to multiple IPv4 (or IPv6) addresses.

Regards,
-drc

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