Cisco Cisco IOS Software Release 12.4(4)T

To specify the address of one or more name servers to use for name and address resolution, use the 
ip name-server command in global configuration mode. To remove the addresses specified, use the no 
form of this command.

ip name-server [vrf vrf-name] server-address1 [server-address2...server-address6] 

no ip name-server [vrf vrf-name] server-address1 [server-address2...server-address6] 

No name server addresses are specified.

Global configuration

The following example shows how to specify IPv4 hosts 172.16.1.111 and 172.16.1.2 as the name 
servers: 

ip name-server 172.16.1.111 172.16.1.2

This command will be reflected in the configuration file as follows:

ip name-server 172.16.1.111

ip name-server 172.16.1.2

The following example shows how to specify IPv4 hosts 172.16.1.111 and 172.16.1.2 as the name 
servers for vpn1:

Router(config)# ip name-server vrf vpn1 172.16.1.111 172.16.1.2

vrf vrf-name

(Optional) Defines a Virtual Private Network (VPN) routing and 
forwarding instance (VRF) table. The vrf-name argument 
specifies a name for the VRF table.

IPv4 or IPv6 addresses of a name server. 

(Optional) IP addresses of additional name servers (a maximum 
of six name servers).

10.0

This command was introduced.

12.2(2)T

Support for IPv6 addresses was added. 

12.0(21)ST

Support for IPv6 addresses was added. 

12.0(22)S

Support for IPv6 addresses was added. 

12.2(14)S

Support for IPv6 addresses was added. 

12.2(27)SBC

This command was integrated into Cisco IOS Release 12.2(27)SBC.

12.4(4)T

The vrf keyword and vrf-name argument were added.