Router1#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router1(config)#ip domain-lookup
Router1(config)#ip domain-name oreilly.com
Router1(config)#ip name-server 172.25.1.1
Router1(config)#ip name-server 10.1.20.5
Router1(config)#end
Router1#
注释 从IOS 12.2开始，思科使用了ip domain lookup.来代替ip domain-lookup 类似的ip domain-name被ip domain name 代替