IPv6 SEO implecations?

[owen at delong.com (Owen DeLong)]

On Mar 28, 2011, at 3:18 PM, Wil Schultz wrote:

> I'm attempting to find out information on the SEO implications of testing ipv6 out.
> 
> A couple of concerns that come to mind are:
> 
> 1) www.domain.com and ipv6.domain.com are serving the exact same content. 
> Typical SEO standards are to only serve good content from a single domain so information isn't watered down and so that the larger search engines won't penalize. So a big concern is having search results take a hit because content is duplicated through two different domains, even though one domain is ipv4 only and the other is ipv6 only.
> 
> 2) Not running ipv6 natively, or using 6to4. 
> This (potentially) increases hop count and will put content on a slower GRE tunnel and add some additional time for page load times. 
> 
> 3) ??? Any others that I haven't thought of ???
> 
> So basically I'd love to set up some sites for ipv6.domain.com via 6to4 as a phase one, and at some point in the near future implement ipv6 natively inside the datacenter, but I'm somewhat concerned about damaging SEO reputation in the process. 
> 
> Thoughts?
> 
> -wil

If you're worried about SEO, go with native IPv6 and then deploy AAAAs for WWW.domain.foo.

It's been working just fine for www.he.net for years.

Owen