Specifies the address of one or more name servers. 設定name server地址 即指定dns服務器 該命令影響范圍只在操作環境 不包括數據流 詳見上面鏈接 ip name-server server-address1 [server-address2...server-address6]
ip helper-address
To have the Cisco IOS software forward User Datagram PRotocol (UDP) broadcasts, including BOOTP, received on an interface, use the ip helper-address interface configuration command. 設定udp廣播轉發地址 即開啟路由器轉發包括dns查詢在內的8種udp廣播報文到指定地址的功能 該命令作用于數據報文 與操作環境無關 詳見Clare Gough: Cisco CCNP Routing Exam Certification Guide (Cisco Press) 第57頁至58頁有關ip helper address說明 ip helper-address address
