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36 Chapter 2: Cisco Internetwork Operating System (IOS) Fundamentals

a single router, the command used to set the parameter is likely to be a configuration sub-
command. Items that are set once for the entire router are likely to be global commands. For
instance, the hostname command is a global command because there is only one host name per
router. The interface ethernet 0 command is a global configuration command because there
is only one such interface in this router. Finally, the ip address command is an interface
subcommand that sets the IP address on the interface; each interface will have a different IP
address.

Figure 2-7

Relationships Among Context-Setting Commands

Mode: Global config

Prompt: hostname(config)#

Commands: Any global,

any context-setting command

Help given on: Global commands,

context-setting commands

Mode: IP RIP config

Prompt: hostname(config-router)#

Commands: RIP commands, Global

commands, Context commands

Help given on: RIP commands

Mode: Console config

Prompt: hostname(config-con)#

Commands: Console commands,

Global commands, Context commands

Help given on: Console commands

Mode: Interface config

Prompt: hostname(config-if)#

Commands: Interface commands,

Global commands, Context commands

Help given on: Interface commands

exit Command or Any Global Command

exit Command

or Any Global

Command

exit Command or Any Global Command

line con0

interface eth0

line con0

router RIP

ch02.fm Page 36 Monday, March 20, 2000 4:57 PM