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Fine tune Windows 2008 (R2) Networking Config

Posted by Brajesh Panda on March 11, 2010

In a vanilla installation of Windows 2008 (R2) you will able to see lots of configuration like ISATAP adapters, Topology Discovery stuff… Personally I don’t like them ;-). Specially if your organisation is not going to migrate the internal network to IPv6. Microsoft ISATAP  stands for inter site automatic tunneling address protocol. And ISATAP adapter helps to encapsulate IPv6 packets inside IPv4 header. This helps in IPv4 to v6 transition easily. Either you can use below command line to disable ISATAP or you may like to disable IPv6 completely using registry key, which will disable all related stuff in your machine.

Here are some steps to clean them up…

Disable Tunnel adapter isatap virtual adapters

Use “netsh int isa set state disabled” command to disable ISATAP adapters

After you run this command check with ipconfig command

Disable Link-Layer Topology*

Link-layer topology discovery Mapper I\O Driver

Link-layer topology discovery Responder

Note:

– Link-layer topology discovery Mapper I\O Driver: Show network map showing all devices which are using this protocol. To me it is like Cisco Discovery Protocol

– Link-layer topology discovery Responder:- While above driver shows all devices, responder pulls out device informations in detail

Disable All IpV6 components using Registry (http://support.microsoft.com/kb/929852)

Under [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\TCPIP6\Parameters] create new Hexadecimal DWORD key as “DisabledComponents”=dword:ffffffff

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7 Responses to “Fine tune Windows 2008 (R2) Networking Config”

  1. […] Fine tune Windows 2008 (R2) Networking Config […]

  2. Jordan said

    In my experience with ipv6 on W2008R2 you invite a whole list of unintended consequences when you disable ipv6 via the registry key noted above. Despite the fact that its cited by Microsoft you should avoid doing this. I have experienced strange routing and ARP behavior in W2008R2 when this is disabled. Fight the normal systems engineer reaction here and leave it be.

    • Jordan; I have never faced issue yet. We have a lot servers using the same config. It is good to know your feedback…can you share your experience? In what circumstances you have faced this issue?

  3. does this help get rid of 6to4 tunnel adapter entries is it that the programs who need IPv6 creates these entires

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