Correct DNS config for 3 DC domain?


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We have three DC's running DNS lets call them DC1 (onsite) and DC2 & DC3 (both offsite at different locations)

PC Clients get DC1 as primary DNS and DC2 as secondary DNS via DHCP

DC1 is statically configured with itself as primary DNS and DC2 as secondary DNS

DC2 is statically configured with itself as primary DNS and DC1 as secondary DNS

DC3 is statically configured with itself as primary DNS and DC1 as secondary DNS

My question is what is the correct way to configure the DNS settings on DC1, DC2 and DC3?

And if a server is referring to itself should it use 127.0.0.1 or the network IP of the server?

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In this scenario each server should point to another one as its primary. The secondary should be its own IP but not 127.0.0.1

Yes but which other server exactly should it reference? Or does it not matter?

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OK so I am thinking of changing it to

Dc1: primary: dc2, secondary: dc1

Dc2: primary: dc3, secondary: dc2

Dc3: primary: dc1, secondary: dc3

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