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Best practice for Pri and Alt DNS settings for multiple site with ADI

Rick_Penney
Rick_Penney asked
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Last Modified: 2015-11-02
Hi
Just wanted to know the best configuration for DNS Primary and Alternate  DNS settings in DCs in second/third logical site
Set up:
One local Domain, 3 physical sites, 2 Domain controllers in each site (All Domain controllers set as Global Catalogues, & DNS (Active Directory integrated zone))
Active Directory subnetted into 3 logical sites.

Site one:
Server 1       192.168.0.1      DNS Pri   192.168.0.2        Alt DNS  127.0.0.1
Server 2      192.168.0.2      DNS Pri        192.168.0.1       Alt DNS  127.0.0.1

Site two:
Server 1      192.168.1.1      DNS Pri        192.168.1.2  or 192.168.0.1       Alt DNS  127.0.0.1
Server 2      192.168.1.2      DNS Pri   192.168.1.1  or 192.168.0.1    Alt DNS  127.0.0.1

Site three:
Server 1      192.168.2.1      DNS Pri        192.168.2.2  or 192.168.0.1       Alt DNS      127.0.0.1      
Server 2      192.168.2.2      DNS Pri   192.168.2.1  or 192.168.0.1      Alt DNS      127.0.0.1

Question:
For site Two, Would I set the Pri DNS on the first domain controller to site Two's second domain controller, or would I set it to site one's first DC?
Same applies for site Three
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