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IPV6 problems RRS feed

  • Question

  • Hi All,

    I'm running a Windows Server 2008r2 domain. I have several servers, and on all of them, I have unticked the IPV6 check box. However when pinging between themselves, or from my laptop (which also has V6 unticked) still resolves and gets replies from the IPV6 address. How is this possible? Basically I need to get IPV6 completely turned off on all servers, as we have some applications that will not work with IPV6. Could anyone help?

    Thanks,

    James.

    Friday, August 20, 2010 12:00 PM

Answers

  • What have you don't to try to correct the situation? You can uninstall some or all of IPv6 to see if that helps.

    How to enable IPv6 in Windows Vista/Windows 7

    IPv6 is enabled by default. It can be disabled by uninstalling the IPv6, or different IPv6 features may be enabled or disabled individually by setting the following registry value:

    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\tcpip6\Parameters\DisabledComponents

    The value can be the combination (logical or) of the follwoing values:
    1 Disable tunnel interfaces
    2 Disable 6to4
    4 Disable ISATAP
    8 Disable Teredo
    16 Disable LAN and PPP interfaces
    32 Set preference of IPv4 over IPv6
    255 Disable IPv6 completely
    bye

    Edoardo Benussi - Microsoft® MVP
    Management Infrastructure - Systems Administration
    https://mvp.support.microsoft.com/Profile/Benussi
    Windows Server Italian Forum Moderator
    edo[at]mvps[dot]org
    Friday, August 20, 2010 1:00 PM

All replies

  • Hi,

     

    Did you enable the DHCPv6 Statless mode?

     

    Regards,

    Friday, August 20, 2010 12:17 PM
  • Hi,

    can you post "ipconfig /all" command results from some of these servers ?


    Edoardo Benussi - Microsoft® MVP
    Management Infrastructure - Systems Administration
    https://mvp.support.microsoft.com/Profile/Benussi
    Windows Server Italian Forum Moderator
    edo[at]mvps[dot]org
    Friday, August 20, 2010 12:18 PM
  • Microsoft Windows [Version 6.1.7600]
    Copyright (c) 2009 Microsoft Corporation.  All rights reserved.



    Windows IP Configuration

       Host Name . . . . . . . . . . . . : {servername}
       Primary Dns Suffix  . . . . . . . : {domainname}
       Node Type . . . . . . . . . . . . : Hybrid
       IP Routing Enabled. . . . . . . . : No
       WINS Proxy Enabled. . . . . . . . : No
       DNS Suffix Search List. . . . . . : {domainname}

    Ethernet adapter Local Area Connection:

       Connection-specific DNS Suffix  . :
       Description . . . . . . . . . . . : Microsoft Virtual Machine Bus Network Ada
    pter
       Physical Address. . . . . . . . . : 00-15-5D-56-B9-00
       DHCP Enabled. . . . . . . . . . . : No
       Autoconfiguration Enabled . . . . : Yes
       IPv4 Address. . . . . . . . . . . : 192.0.0.127(Preferred)
       Subnet Mask . . . . . . . . . . . : 255.255.255.0
       Default Gateway . . . . . . . . . : 192.0.0.235
       DNS Servers . . . . . . . . . . . : 192.0.0.126
                                           192.0.0.241
       NetBIOS over Tcpip. . . . . . . . : Enabled

    Tunnel adapter isatap.{6E94AFDB-36B1-42BD-9BB5-287EEB4394B4}:

       Media State . . . . . . . . . . . : Media disconnected
       Connection-specific DNS Suffix  . :
       Description . . . . . . . . . . . : Microsoft ISATAP Adapter
       Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
       DHCP Enabled. . . . . . . . . . . : No
       Autoconfiguration Enabled . . . . : Yes

    Tunnel adapter 6TO4 Adapter:

       Connection-specific DNS Suffix  . :
       Description . . . . . . . . . . . : Microsoft 6to4 Adapter
       Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
       DHCP Enabled. . . . . . . . . . . : No
       Autoconfiguration Enabled . . . . : Yes
       IPv6 Address. . . . . . . . . . . : 2002:c000:7f::c000:7f(Preferred)
       Default Gateway . . . . . . . . . : 2002:c058:6301::c058:6301
       DNS Servers . . . . . . . . . . . : 192.0.0.126
                                           192.0.0.241
       NetBIOS over Tcpip. . . . . . . . : Disabled

    Tunnel adapter Teredo Tunneling Pseudo-Interface:

       Media State . . . . . . . . . . . : Media disconnected
       Connection-specific DNS Suffix  . :
       Description . . . . . . . . . . . : Teredo Tunneling Pseudo-Interface
       Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
       DHCP Enabled. . . . . . . . . . . : No
       Autoconfiguration Enabled . . . . : Yes


    Friday, August 20, 2010 12:25 PM

  • Tunnel adapter 6TO4 Adapter:

       Connection-specific DNS Suffix  . :
       Description . . . . . . . . . . . : Microsoft 6to4 Adapter
       Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
       DHCP Enabled. . . . . . . . . . . : No
       Autoconfiguration Enabled . . . . : Yes
       IPv6 Address. . . . . . . . . . . : 2002:c000:7f::c000:7f(Preferred)
       Default Gateway . . . . . . . . . : 2002:c058:6301::c058:6301
       DNS Servers . . . . . . . . . . . : 192.0.0.126
                                           192.0.0.241
       NetBIOS over Tcpip. . . . . . . . : Disabled



    disable this adapter.
    Edoardo Benussi - Microsoft® MVP
    Management Infrastructure - Systems Administration
    https://mvp.support.microsoft.com/Profile/Benussi
    Windows Server Italian Forum Moderator
    edo[at]mvps[dot]org
    Friday, August 20, 2010 12:42 PM
  • how do I do this? I can't see that adapter in the list of network adapters.
    Friday, August 20, 2010 12:51 PM
  • What have you don't to try to correct the situation? You can uninstall some or all of IPv6 to see if that helps.

    How to enable IPv6 in Windows Vista/Windows 7

    IPv6 is enabled by default. It can be disabled by uninstalling the IPv6, or different IPv6 features may be enabled or disabled individually by setting the following registry value:

    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\tcpip6\Parameters\DisabledComponents

    The value can be the combination (logical or) of the follwoing values:
    1 Disable tunnel interfaces
    2 Disable 6to4
    4 Disable ISATAP
    8 Disable Teredo
    16 Disable LAN and PPP interfaces
    32 Set preference of IPv4 over IPv6
    255 Disable IPv6 completely
    bye

    Edoardo Benussi - Microsoft® MVP
    Management Infrastructure - Systems Administration
    https://mvp.support.microsoft.com/Profile/Benussi
    Windows Server Italian Forum Moderator
    edo[at]mvps[dot]org
    Friday, August 20, 2010 1:00 PM
  • Hi,


    To disable IPv6 on a specific connection, you can go to the Network Connections folder, obtain properties of the connection and clear the check box next to the Internet Protocol version 6 (TCP/IPv6) component in the list. This method disables IPv6 on your LAN interfaces and connections, but does not disable IPv6 on tunnel interfaces or the IPv6 loopback interface.

    To selectively disable IPv6 components and configure behaviors for IPv6 in Windows Vista, create and configure the following registry value (DWORD type)

    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\tcpip6\Parameters\DisabledComponents

    DisabledComponents is set to 0 by default.

    The DisabledComponents registry value is a bit mask that controls the following series of flags, starting with the low order bit (Bit 0):

        * Bit 0 Set to 1 to disable all IPv6 tunnel interfaces, including ISATAP, 6to4, and Teredo tunnels. Default value is 0
        * Bit 1 Set to 1 to disable all 6to4-based interfaces. Default value is 0
        * Bit 2 Set to 1 to disable all ISATAP-based interfaces. Default value is 0
        * Bit 3 Set to 1 to disable all Teredo-based interfaces. Default value is 0
        * Bit 4 Set to 1 to disable IPv6 over all non-tunnel interfaces, including LAN interfaces and *Point-to-Point Protocol (PPP)-based interfaces. Default value is 0
        * Bit 5 Set to 1 to modify the default prefix policy table to prefer IPv4 to IPv6 when attempting connections. Default value is 0

    To determine the value of DisabledComponents for a specific set of bits, construct a binary number consisting of the bits and their values in their correct position and convert the resulting number to hexadecimal. For example, if you want to disable 6to4 interfaces, disable Teredo interfaces, and prefer IPv4 to IPv6, you would construct the following binary number: 101010. When converted to hexadecimal, the value of DisabledComponents is 0x2A.

    The following table lists some common configuration combinations and the corresponding value of DisabledComponents.

    Configuration combination    DisabledComponents value
    Disable all tunnel interfaces    0x1
    Disable 6to4    0x2
    Disable ISATAP    0x4
    Disable Teredo    0x8
    Disable Teredo and 6to4    0xA
    Disable all LAN and PPP interfaces    0x10
    Disable all LAN, PPP, and tunnel interfaces    0x11
    Prefer IPv4 over IPv6    0x20
    Disable IPv6 over all interfaces and prefer IPv4 to IPv6    0xFF



    Now remember to disable:

    -6t04
    -ISATAP
    -Teredo

    Regards,
    Friday, August 20, 2010 1:01 PM
  • The value can be the combination (logical or) of the follwoing values:
    1 Disable tunnel interfaces
    2 Disable 6to4
    4 Disable ISATAP
    8 Disable Teredo
    16 Disable LAN and PPP interfaces
    32 Set preference of IPv4 over IPv6
    255 Disable IPv6 completely

    It should be noted here that you have Decimal (not Hexadecimal) selected as the base when creating DWORD value, as these are the decimal values. The hex values would be:

    1 Disable tunnel interfaces
    2 Disable 6to4
    4 Disable ISATAP
    8 Disable Teredo
    10 Disable LAN and PPP interfaces
    20 Set preference of IPv4 over IPv6
    FF Disable IPv6 completely
    Friday, December 31, 2010 8:43 AM