Cisco Systems Cisco IOS XR manual Not available on most routers

Chapter 4 Configuring General Router Features

Navigating the Cisco IOS XR Command Modes

Table 4-4 Common Command Modes and CLI prompts (continued)

Command Mode	Description
Global configuration	Global configuration mode is the starting point for SDR configuration. Commands entered in this
	mode affect the SDR 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 The system prompt changes to “router(config)” to indicate that the router is now in global
	configuration mode.
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 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.
Interface configuration	The interface configuration submode is used to select and configure a hardware interface, such as a
	Packet-over-SONET/SDH (POS) interface. To enter interface configuration mode from global
	configuration mode, use an interface command. An interface configuration command always
	follows an interface global configuration command, which defines the interface type. The following
	command syntax is used for entering interface configuration submode:
	RP/0/RP0/CPU0:router(config)# interface POS 0/2/0/0
	RP/0/RP0/CPU0:router(config-if)#
Router configuration	The router configuration submode is used to select and configure a routing protocol, such as BGP,
	OSPF, or IS-IS. The following command syntax is used for entering router configuration submode:
	RP/0/RP0/CPU0:router(config)# router <protocol> <protocol_options>
	Replace protocol with the keyword for the protocol you want to configure. Replace
	protocol_options with any keywords and arguments required for that protocol. In the following
	example, the router enters the router configuration mode for BGP:
	RP/0/RP0/CPU0:router# configure
	RP/0/RP0/CPU0:router(config)# router bgp 140
	RP/0/RP0/CPU0:router(config-bgp)#

	Cisco IOS XR Getting Started Guide
4-20	OL-10957-02