A router's name is referred to as the hostname . The default hostname for all Cisco routers is "Router." You can change the hostname of a router in global configuration mode by entering the hostname command. The hostname is changed with the following commands: Router(config)#hostname NFLD NFLD(config)# Notice that the hostname changed from "Router" to "NFLD" immediately after executing the command. The banner motd command allows you to display a message-of-the-day (MOTD) banner every time you log in to the router. Even though the banner message was designed to convey day-to-day messages, it is typically used for displaying security messages for legal reasons: NFLD(config)#banner motd * Authorized Access Only, All Violations Will Be Prosecuted * NFLD(config)#
In this scenario, the next time you Telnet into the router, the MOTD banner will display the following message: Authorized Access Only, All Violations Will Be Prosecuted. User Access Verification Password: A description can be added to every interface using the description command. Typically, an interface description, which is limited to 80 characters , is used to describe the function of the interface, as shown in the following: NFLD(config)#interface s0 NFLD(config-line)#description 56K between NFLD and San Diego NFLD(config-line)# The next time someone views the running configuration file, she will see the following description: interface Serial0 description 56K connection between NFLD and San Diego ip address 138.144.2.2 255.255.255.0 encapsulation frame-relay bandwidth 2000 frame-relay lmi-type cisco |