Have you checked the IPv6 DNS records for your DCs?  Do they look right?

On Tue, Jul 3, 2012 at 1:07 PM, Glen Johnson <[email protected]> wrote:

> Need help please.
> We have 3 x 2008r2 domain controllers.
> We've been fighting with some unusually slow domain logins and other
> flakiness for a while.
> For example navigating between OUs in active directory users and computers
> is painfully slow.
> While testing basic connectivity, I found that a ipv6 ping to one of our
> domain controllers fails, but here is the interesting part.
> If I ping -6  from domain controller to my workstation, then for a couple
> minutes, ping -6 from my workstation to the domain controller works.
> After just about 2 minutes, it begins failing again when I ping
> workstation to server.  Destination host unreachable is the error.
> Ping -6 from my workstation to all other servers and domain controllers
> work fine.
> I checked the windows firewall on the failing computer and it looks
> identical to the other 2 domain controllers.
> One point that may be relevant.  The failing DC has 2 nics.  I did try
> disabling one of the nics and rebooting.  No help.
> Turned windows firewall off, no help.
> Any suggestions appreciated.
>
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~ Finally, powerful endpoint security that ISN'T a resource hog! ~
~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/>  ~

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