Question : How do you setup DNS for Windows SBS 2008

One of my clients has some issues such as slow logon and accessing Exchange. When I check the status of the DNS using nslook, it shows Default Server:  UnKnown and it is use IPv6 IP as DNS as shown below. Should we setup IPv4 IP or IPv6 IP as primary DNS IP?

If using IPv6 as DNS IP is fine, how do yuo fix unknown default server?

Microsoft Windows [Version 6.0.6001]
Copyright (c) 2006 Microsoft Corporation.  All rights reserved.

C:\Users\BLin>ipconfig /all

Windows IP Configuration

   Host Name . . . . . . . . . . . . : CHICAGOTESERVER
   Primary Dns Suffix  . . . . . . . : chicagotechnet.local
   Node Type . . . . . . . . . . . . : Hybrid
   IP Routing Enabled. . . . . . . . : No
   WINS Proxy Enabled. . . . . . . . : No
   DNS Suffix Search List. . . . . . : chicagotechnet.local

Ethernet adapter Local Area Connection:

   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : Intel(R) PRO/1000 MT Network Connection
   Physical Address. . . . . . . . . : 00-50-56-B2-79-F4
   DHCP Enabled. . . . . . . . . . . : No
   Autoconfiguration Enabled . . . . : Yes
   Link-local IPv6 Address . . . . . : fe80::a:e14a:c921:813%10(Preferred)
   Link-local IPv6 Address . . . . . : fe80::de82:990d:6ea5:341%10(Preferred)
   IPv4 Address. . . . . . . . . . . : 192.168.10.2(Preferred)
   Subnet Mask . . . . . . . . . . . : 255.255.255.0
   Default Gateway . . . . . . . . . : 192.168.10.1
   DNS Servers . . . . . . . . . . . : fe80::de82:990d:6ea5:341%10
                                       192.168.10.2
   NetBIOS over Tcpip. . . . . . . . : Enabled

Tunnel adapter Local Area Connection* 8:

   Media State . . . . . . . . . . . : Media disconnected
   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : isatap.{FF368094-737F-4206-896C-AF1ACA755
F39}
   Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
   DHCP Enabled. . . . . . . . . . . : No
   Autoconfiguration Enabled . . . . : Yes

C:\Users\BLin>nslookup
DNS request timed out.
    timeout was 2 seconds.
Default Server:  UnKnown
Address:  fe80::de82:990d:6ea5:341

Answer : How do you setup DNS for Windows SBS 2008

There you go. Production SBS 2008 ~ 6 months.

Philip