Yahoo and IPv6

Owen DeLong owen at
Mon May 16 22:44:58 UTC 2011

On May 16, 2011, at 2:10 AM, George Bonser wrote:

>> Because that way the IPv4 and IPv6 swarms remain disconnected in the
>> absence of some dual stack peers. (I.e., if the swarm is small and
>> you're the only IPv6 participant.)
>> It would be much better if you could go from IPv6 to IPv4 through a
>> NAT64.
> The problem is when the client is handed an explicit address rather than
> a host name.  In that case, there needs to be some standard environment
> variable for "IPv64 Prefix" that applications can query.
> For a browser this might be something like the configured proxy.  Maybe
> an OS such as Windows might have a registry value for this.  Maybe Linux
> and other unix-like variations could have a sysctl for that.
It shouldn't be a sysctl. It should be more like resolv.conf at worst.

> There should be some standard way for a native v6 host to determine the
> v6 to v4 prefix to use in a NAT64 environment.

This assumes some standard way to do NAT64.


More information about the NANOG mailing list