The tcp/ipv6 protocol suite is not installed by default on windows server 2016.

Windows Vista, Windows Server 2008, and later on versions of Windows implement RFC 3484 and also use a preresolve table to recognize which attend to to use as soon as multiple addresses are available for a Doprimary Name System (DNS) name.

You watching: The tcp/ipv6 protocol suite is not installed by default on windows server 2016.

By default, Windows favors IPv6 international uniactors addresses over IPv4 addresses.

Initial product version: Windows 10 - all editions, Windows Server 2019, Windows Server 2016, Windows Server 2012 R2Initial KB number: 929852


It is prevalent for IT administrators to disable IPv6 to troubleshoot networking-associated problems such as name resolution issues.


Internet Protocol variation 6 (IPv6) is a mandatory part of Windows Vista and also Windows Server 2008 and more recent versions. We execute not recommfinish that you disable IPv6 or its components. If you perform, some Windows components may not function.

We recommfinish making use of Prefer IPv4 over IPv6 in prefix policies instead of disabling IPV6.

Use registry essential to connumber IPv6


Follow the steps in this section carefully. Serious troubles can take place if you modify the regisattempt mistakenly. Before you modify it, earlier up the regisattempt for restoration in situation troubles happen.

The IPv6 usability have the right to be configured by modifying the following regisattempt key:

Location: HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesTcpip6ParametersName: DisabledComponentsType: REG_DWORDMin Value: 0x00 (default value)Max Value: 0xFF (IPv6 disabled)

IPv6 FunctionalityRegistry worth and also comments
Prefer IPv4 over IPv6Dec 32Hex 0x20Bin xx1x xxxxRecommfinished rather of disabling IPv6.
Disable IPv6Dec 255Hex 0xFFBin 1111 1111See startup delay occurs after you disable IPv6 in Windows if you enrespond to startup delay after disabling IPv6 in Windows 7 SP1 or Windows Server 2008 R2 SP1. In addition, mechanism startup will be delayed for 5 seconds if IPv6 is disabled by mistakenly, establishing the DisabledComponents registry establishing to a worth of 0xffffffff. The correct value need to be 0xff. For more information, see Web Protocol Version 6 (IPv6) Synopsis. The DisabledComponents registry worth doesn"t affect the state of the inspect box. Even if the DisabledComponents registry vital is set to disable IPv6, the examine box in the Networking tab for each interface have the right to be checked. This is an supposed actions. You cannot totally disable IPv6 as IPv6 is used internally on the system for many kind of TCPIP tasks. For instance, you will certainly still be able to run ping ::1 after configuring this establishing.
Disable IPv6 on all nontunnel interfacesDec 16 Hex 0x10Bin xxx1 xxxx
Disable IPv6 on all tunnel interfacesDec 1 Hex 0x01Bin xxxx xxx1
Disable IPv6 on all nontunnel interencounters (except the loopback) and on IPv6 tunnel interfaceDec 17 Hex 0x11Bin xxx1 xxx1
Prefer IPv6 over IPv4Bin xx0x xxxx
Re-permit IPv6 on all nontunnel interfacesBin xxx0 xxxx
Re-permit IPv6 on all tunnel interfacesBin xxx xxx0
Re-permit IPv6 on nontunnel interencounters and on IPv6 tunnel interfacesBin xxx0 xxx0


Administrators should develop an .admx file to expose the registry settings of below table in a Group Policy establishing.You should rebegin your computer for these transforms to take result.Values various other than 0 or 32 reasons the Routing and Remote Access service to fail after this change takes impact.

By default, the 6to4 tunneling protocol is permitted in Windows once an interface is assigned a public IPv4 resolve (Public IPv4 deal with implies any IPv4 address that isn’t in the ranges,, or 6to4 immediately asindicators an IPv6 attend to to the 6to4 tunneling interchallenge for each attend to, and 6to4 dynamically registers these IPv6 addresses on the assigned DNS server. If this actions isn’t wanted, we recommfinish disabling the IPv6 tunnel interfaces on the influenced hosts.

You have the right to also follow these measures to modify the registry key:

Open an bureaucratic Command Prompt window.

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Run the adhering to command:

reg add "HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesTcpip6Parameters" /v DisabledContents /t REG_DWORD /d /f

Rearea the via the matching worth.

How to calculate the registry value

Windows usage bitmasks to check the DisabledComponents worths and determine whether a component have to be disabled.

To learn which component each bit (from low to high) controls, describe the adhering to table.

TunnelDisable tunnel interfaces
Tunnel6to4Disable 6to4 interfaces
TunnelIsatapDisable Isatap interfaces
Tunnel TeredoDisable Teredo interfaces
NativeDisable native interfaces (additionally PPP)
PreferIpv4Prefer IPv4 in default preresolve policy
TunnelCpDisable CP interfaces
TunnelIpTlsDisable IP-TLS interfaces

For each bit, 0 indicates false and 1 suggests true. Refer to the following table for an instance.

SettingPrefer IPv4 over IPv6 in presettle policiesDisable IPv6 on all nontunnel interfacesDisable IPv6 on all tunnel interfacesDisable IPv6 on nontunnel interencounters (other than the loopback) and on IPv6 tunnel interface
Disable tunnel interfaces0011
Disable 6to4 interfaces0000
Disable Isatap interfaces0000
Disable Terecarry out interfaces0000
Disable native interfaces (likewise PPP)0101
Prefer IPv4 in default preresolve policy.1000
Disable CP interfaces0000
Disable IP-TLS interfaces0000
Binary0010 00000001 00000000 00010001 0001

Using the netjob-related properties GUI to disable IPv6 is not supported

This regisattempt value does not impact the state of the complying with inspect box. Even if the regisattempt essential is collection to disable IPv6, the inspect box in the Networking tab for each interchallenge can be schosen. This is an intended actions.



For more information about RFC 3484, check out Default Address Selection for Net Protocol version 6 (IPv6).

For even more information around exactly how to collection IPv4 precedence over IPv6, see Using SIO_ADDRESS_LIST_SORT.

For indevelopment about RFC 4291, check out IP Version 6 Addressing Architecture.

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For even more indevelopment around the connected problems, view the write-ups below:

Tools to help through netoccupational trace: Netjob-related Monitor 3.4 (archive)


Netmon 3.4 isn"t compatible via Windows Server 2012 or newer OS as soon as LBFO NIC teaming is enabled. Use Article Analyzer rather.