Cisco Systems Cisco IOS XR Manual De Usuario

EXEC commands can be executed from any configuration mode by preceding the command with the do 
keyword. Executing EXEC commands from a configuration mode allows you to display the state of the 
system without exiting the configuration mode. For example:

RP/0/RP0/CPU0:router(config)# do show version

Cisco IOS-XR Software, Version 1.0.0

Copyright (c) 2004 by cisco Systems, Inc.

ROM: System Bootstrap, Version 1.15(20040120:002852) [ROMMON],

router uptime is 1 hour, 40 minutes

1000592k bytes of ATA PCMCIA card at disk 0 (Sector size 512 bytes).

Configuration register is 0x2

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Router submode 
configuration

Router configuration submodes are accessed from router configuration mode. The following 
command syntax is used for entering router address family configuration submode:

RP/0/RP0/CPU0:router(config)# router bgp 140

RP/0/RP0/CPU0:router(config-bgp)# address-family ipv4 multicast

RP/0/RP0/CPU0:router(config-bgp-af)#

For more information, see the following Cisco Systems documents:

ROM Monitor 
(ROMMON) mode

The ROM Monitor is a bootstrap program that initializes the hardware and boots the system when 
a router is powered on or reset. ROM Monitor mode is also known as “ROMMON,” which reflects 
the CLI prompt for the mode. 

rommon B1>

During normal operation, users do not interact with ROMMON. This mode is accessed only by 
manually interrupting the boot process and placing the system in ROMMON. Once in ROMMON, 
you can perform ROM Monitor tasks, including reinstallation of the Cisco IOS XR software, 
password recovery, and other diagnostic tasks.

The ROM Monitor CLI mode is accessible only from a terminal connected directly to the Console 
port of the primary RP, a terminal-modem connection to the AUX port, or through a terminal server. 

See Cisco IOS XR ROM Monitor Guide for information and instructions on using ROM Monitor 
mode.