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You got bad advice. There is no reason to disable v6 and it is still used by many internal Windows processes so disabling it can cause issues.
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IPV6 it is used by many processes including :<br />
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HomeGroup<br />
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Direct Access<br />
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Windows Mail &nbsp;...<br />
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and Microsoft <a href="https://technet.microsoft.com/en-us/network/cc987595.aspx" rel="ugc">does not recommend that</a>, and it also seems to not just increase instablity but also delays by &nbsp;5 second the overall booting process.
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Thanks for the feedback. &nbsp;Just in case it makes a difference, he was specifically concerned with the way we have 2003 and 2008 R2 DNS servers. &nbsp;The issue was to do with replicating those address between this mix of servers. &nbsp;Sounds like this is not the case though.
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IPv6 will not affect DNS - it will pass by the IPv4 set up. Just leave it installed.
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You are very welcome and I was happy to help.
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Our network has two Windows Server 2003 and one 2008 DNS servers. &nbsp;I was advised that because of this configuration and because we have no current need we should disabled IPv6 on our DB and IIS servers and delete the IPv6 entries on the DNS servers. &nbsp;<br />
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I've not been able to find any similar recommendations googling around. &nbsp;Is this good advice?
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Our network has two Windows Server 2003 and one 2008 DNS servers.  I was advised that because of this configuration and because we have no current need we should disabled IPv6 on our DB and IIS servers and delete the IPv6 entries on the DNS servers.  

I've not been able to find any similar recommendations googling around.  Is this good advice?

Should I disable IPv6 if using Windows Server 2003 and 2008 DNS servers

Windows Server 2003 was based on Windows XP and was released in four editions: Web, Standard, Enterprise and Datacenter. It also had derivative versions for clusters, storage and Microsoft’s Small Business Server. Important upgrades included integrating Internet Information Services (IIS), improvements to Active Directory (AD) and Group Policy (GP), and the migration to Automated System Recovery (ASR).

Windows Server 2003

Windows Server 2008 and Windows Server 2008 R2, based on the Microsoft Vista codebase, is the last 32-bit server operating system released by Microsoft. It has a number of versions, including including Foundation, Standard, Enterprise, Datacenter, Web, HPC Server, Itanium and Storage; new features included server core installation and Hyper-V.

Windows Server 2008

The Domain Name System (DNS) is a hierarchical, globally distributed system responsible for associating the name of a computer, service or other resource into an IP address for connecting to the Internet or a private network. Most prominently, it translates domain names to the numerical IP addresses needed for the purpose of computer services and devices worldwide.

The Windows operating systems have distinct methodologies for designing and implementing networks, and have specific systems to accomplish various networking processes, such as Exchange for email, Sharepoint for shared files and programs, and IIS for delivery of web pages. Microsoft also produces server technologies for networked database use, security and virtualization.