How to stop Direct Access Server to advertise the Default Route, since this slows down IE Connections

Hi,

we have the following problem.

In our network we deployed IPv6 with Unicat Local Addresses. We deployedServer 2008 R2 with Direct Access. Connections all work fine.

After Reboot the DA Server advertises the Default Route. And this slows down all IE Website Connections !

PS C:\Windows\system32> netsh
netsh>int ipv6
netsh interface ipv6>sh route

Veröff.  Typ       Met   Präfix                    Idx  Gateway/Schnittstelle
-------  --------  ----  ------------------------  ---  ---------------------
Ja       Manuell   1100  ::/0                       16  2002:c058:6301::c058:6301
Nein     Manuell   256  ::1/128                     1  Loopback Pseudo-Interface 1
Nein     Manuell   8    2001::/32                  14  Teredo Tunneling Pseudo-Interface
Ja       Manuell   1000  2002::/16                  16  6TO4 Adapter
Nein     Manuell   256  2002:c279:cb51::c279:cb51/128   16  6TO4 Adapter
Ja       Manuell   256  2002:c279:cb51:2::/64      15  IPHTTPSInterface
Nein     Manuell   256  2002:c279:cb51:2::/128     15  IPHTTPSInterface
Nein     Manuell   256  2002:c279:cb51:2:f227:5217:dd63:dc27/128   15  IPHTTPSInterface
.............

I then stop this with:
set route prefix="::/0" 16 publish=no store=pers

with the result:

Veröff.  Typ       Met   Präfix                    Idx  Gateway/Schnittstelle
-------  --------  ----  ------------------------  ---  ---------------------
Nein     Manuell   1100  ::/0                       16  2002:c058:6301::c058:6301

BUT, after Reboot the route will still be advertised.

I have in addition tried to delete the route. After Reboot still the same.

How we can solve this problem ?

What is the technical background?

Thanks

Ewald