Migration of Ex2007 from sbs2008 to ex 2013


I am migrating exchange 2007 from SBS2008 to exchange 2013 on server 2012.   As per Microsoft exchange server deployment assistant, it tells me to disable IPV6 on SBS2008.  This has been crashing my server.  If I leave the IPV6 enabled, is it going to cause problem with the migration?
Joe JohnsonAsked:
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Have you just unchecked IPv6 protocol on the NIC properties or you have disabled IPv6 thru registry?

Look at the end of of this article:
Joe JohnsonAuthor Commented:
I have disabled from the registry and removed the entry on the host file for ipv6.
Nathan HawkinsTechnical Lead - Network SecurityCommented:
I am just about done with an Exchange 2007 to 2013 migration and IPv6 has absolutely nothing to do with the migration/installation. I installed each role separately including edge transport and I not once messed around with IPv6, nor was it ever an issue. There is a lot of "hearsay" out on the blogs that you need to disable it. Do not be fooled. IPv6 has nothing to do with the insatllation of Exch 2013 in any sense of the word.

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" Some connections between Exchange 2007 and Exchange 2013 don’t work correctly when IPv6 is enabled and an Exchange 2007 server has both the Mailbox and Client Access server roles installed." some post says (http://blogs.msmvps.com/bradley/2014/01/22/smbkitchen-disabling-ipv6-or-not) but maybe this has some sense just in coexistense when they are both exch2007 and exch2013 installed in the same organization.

I can not recall if I have disabled IPv6 at migrations, but I probably had. It is nice to know that migration goes smoothly also without IPv6 being disabled.
I have tried to find out some more info what is all about, but I couldn't find anything except that some are saying that IPv6 could prevent programs using collaboration data objects connections, which should be corrected by exchange 2007 rollup 5.
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