For whatever reason, you may wish to use your Cisco router as a primary DNS server. If you're stuck in a situation where you need to send certain DNS domain names to different DNS servers then this post is for you!
Firstly we must set our default DNS servers:
ip name-server 18.104.22.168
ip name-server 22.214.171.124
Secondly, now we need to configure our different DNS servers as "views"
ip dns view default
dns forwarder 126.96.36.199
dns forwarder 188.8.131.52
ip dns view internal_dns
dns forwarder 192.168.0.10
dns forwarder 192.168.0.11
Now we match our DNS views into a "view-list"
ip dns view-list conditional
! give the internal_dns view a priority of 10 and bind it to name-group 1
view internal_dns 10
restrict name-group 1
! give the default view a highest priority
view default 99
Define the domains you wish to forward internally by "name-list"
ip dns name-list 1 permit 10\.IN-ADDR
ip dns name-list 1 permit .*.LOCAL
Enable the DNS server to the view-group "conditional"
ip dns server view-group conditional
Lastly, enable the DNS server
ip dns server