How to Configure Cisco router as DNS Server

Steps below clarify how to configure your cisco router to work as a dns server.

1-Enable DNS Service on the router
R(config)#ip dns server

2-Enable domain-lookup on the router, to be able to resolve name to ip address by lookup the host table that contains list of  ip address and corresponding names.
R(config)#ip domain-lookup

3-Specify the public name servers. When the local client request to solve a name that doesn't exist in the local host table of the router, the router will forward the request to the public dns servers. you can specify more than one name server because if one fails, the ther will take over.
R(config)#ip name-server 8.8.8.8
R(config)#ip name-server 1.1.1.1

4-configure the router with hostname of the local clients and their corresponding ip addresses.
R(config)#ip host john 192.168.1.5
R(config)#ip host john 192.168.1.6

5-Enjoy resloving . If you ping Sara, the router will resolve the name Sara to the ip 192.1681.6 and sara pc will reply.

The following video will show you how to configure, and verify DNS resolving.

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