Router to act as primary DNS

[peter.williams]

I am trying to configure a router as a primary DNS server for our remote locations.  Does anybody have example config that I can look at to see how to configure it?  Also I will need to to forward the DNS if it cannot resolve it, is that possible?

Thank you for your help

[Raphael Wouters]

Hi Peter,

That's indeed possible, you'll basically need to configure the router as a DNS server, configure the other DNS server forwarders, and then configure all the local hosts names:

ip domain name example.com

ip dns server                                ! The router will now act as a DNS server

!

ip name-server 192.168.2.120 192.168.2.121   ! The other server forwarders

!

!   Start configuring your hosts:

!

ip host user1.example.com 192.168.201.5 192.168.201.6

ip host user2.example.com 192.168.201.7

!   [...]

!

! To configure the router as authoritative for a zone

ip dns primary example.com soa ns1.example.com mb1.example.com

This documentation explains the steps more in details:

http://www.cisco.com/en/US/docs/ios/ipaddr/configuration/guide/iad_config_dns_ps6350_TSD_Products_Configuration_Guide_Chapter.html#wp1063353