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tcp/ip V6 on SERVER 2008 R2 (DC role,DHCP role)

Posted on 2011-02-28
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Last Modified: 2012-06-27
Hello,

I am currently migrating from SBS 2003 to 2 new servers (server1 and server2) provided with server 2008 R2 X64;

Server1 : currently joined today  in existing domain,unchecked tcp/ip V6 on NIC and performed  DCPROMO with success.

During preparation of  installation DHCP role,on server1 (to replace the DHCP role from the SBS2003) i am not sure to choose which option below;

enable DHCPV6 stateless mode or
Disable DHCPV6 statelss mode

2nd important thing, i want to install on server2  tomorrow the following role  and application;

Domain controller role & Exchange 2010.
Do i need to enable tcp/ipV6 on the tcp/ip properties on the nic regarding Exchange 2010 to operate properly and if so, can i still leave tcp/ipV6 disabled on Server1  or do i have to enable it because of replication between the 2 DC's ?
If i should re-enable tcp/ipV6 on server1,are any other action's requiered (dcdiag/fix,...)?

Thank you


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Question by:antwerp2007
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MichaelVH earned 2000 total points
ID: 34998504
Hi there,

1. First of all, Exchange 2010 'needs' IPv6, there is actually no need to disable it. You can leave it running.

2. Here is some more information on ipv6-modes:
http://technet.microsoft.com/en-us/library/cc753493.aspx

If for any reason you would need to re-enable ipv6 on server 1; that should be pretty straightforward.
Please be aware that ticking-of the checkbox in front of IPV6 to disable it (nic properties) is not enough. You should set the following reg key as well:

HKLM\System\CurrentControlSet\Services\TCPIP6\Parameters\DisabledComponents = ffffffff

Hope this helps,

Michael
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by:antwerp2007
ID: 34998749
Thank you for the quick response MichealVH but i have some comments;

I read meanwhile  on technet that Server 2008 R2 solved the need to use V6 regarding Exchange 2010,so you can use it on V4 only?


and

 If I enable on the nic properties from Server1 again the tcp/ipV6 protocol and give a static entry, should i perform another action/command in order of the DC function?
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by:antwerp2007
ID: 34998790
or can a DC (Server 2008 R2) with only ipV4 replicate without any problem with another DC (Server 2008 R2) that has ipV4 and ipV6 both enabled?

I assume it should not be a problem, but i want to be sure.
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by:MichaelVH
MichaelVH earned 2000 total points
ID: 34999909
Antwerp (raar dat ik iemand aanspreek met een stadsnaam...),

I've reproduced what you're trying to do and I haven't had any issues with one DC running on ipv4 and the other one on both.

So you should be fine.
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by:antwerp2007
ID: 35000128
Hehe,Bedankt alvast!Kan weer rustig verder migreren.

Thanks a lot!
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by:antwerp2007
ID: 35000185
Thanks for the lab test!
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