Cisco Systems IOS XR Manual De Usuario

This chapter contains instructions and information for entering basic configurations using the 
command-line interface (CLI). 

This chapter contains the following sections:

Configure a domain name and domain name server (DNS) for your router to make contacting other 
devices on your network more efficient. Use the following guidelines:

To define a default domain name that the Cisco IOS XR software uses to complete unqualified 
hostnames (names without a dotted-decimal domain name), use the domain-name command in 
global configuration mode. 

To specify the address of one or more name servers to use for name and address resolution, use the 
domain name-server command in global configuration mode. If no name server address is 
specified, the default name server is 255.255.255.255 so the DNS lookup can be broadcast to the 
local network segment. If a DNS server is in the local network, it replies. If not, there might be a 
server that knows how to forward the DNS request to the correct DNS server. 

Use the show hosts command in EXEC mode to display the default domain name, the style of name 
lookup service, a list of name server hosts, and the cached list of hostnames and addresses.