Summary Of Common Command Modes - Cisco CRS-1 - Carrier Routing System Router Getting Started Manual

Navigating the Cisco IOS XR Command Modes

Summary of Common Command Modes

Table 2-4
associated CLI prompts.
Table 2-4 Common Command Modes and CLI prompts
Command Mode Description
EXEC Logging in to a router running the Cisco IOS XR software automatically places the router in EXEC
mode.
Example:
RP/0/RP0/CPU0:router#
EXEC mode enables a basic set of commands to display the operational state of the router and
examine the state of an operating system. Most CLI commands in EXEC mode do not change the
system operation. The most common EXEC commands are show commands (to display router
configuration or operational data) and clear commands (to clear or reset system counters).
Additional commands are available depending on the access privileges (user groups) assigned to
your username. Minimal privileges also include a small set of EXEC commands for connecting to
remote devices, changing terminal line settings on a temporary basis, and performing basic tests.
Global configuration Global configuration mode is the starting point for system configuration. Commands entered in this
mode affect the system as a whole, rather than just one protocol or interface. Global configuration
mode is also used for entering configuration submodes to configure specific elements such as
interfaces or protocols.
To enter global configuration mode, enter the configure command at the EXEC command prompt:
RP/0/RP0/CPU0:router# configure
RP/0/RP0/CPU0:router(config)#
Note
Configuration From the global configuration mode, you can also enter other, more specific command modes.
submodes These modes are available based on your assigned access privileges, and include protocol-specific,
platform-specific, and feature-specific configuration modes.
In the following example, MPLS LDP configuration mode is entered from global configuration
mode. The prompt for MPLS LDP configuration submode appears as config-ldp. The following
command syntax is used for entering configuration MPLS LDP submode:
RP/0/RP0/CPU0:router#
RP/0/RP0/CPU0:router# configure
RP/0/RP0/CPU0:router(config)# mpls ldp
RP/0/RP0/CPU0:router(config-ldp)
Note
Cisco CRS-1 Series Carrier Routing System Getting Started Guide
2-10
summarizes the most common command modes of the Cisco IOS XR software, and the
The system prompt changes to "
configuration mode.
The availability of any particular mode depends on the router features and the access rights
of the individual user. For example, a configuration mode for configuring access servers is
not available on most routers.
Chapter 2 Cisco IOS XR Basic Configuration Management
" to indicate that the router is now in global
router(config)