Cisco Catalyst 4500 Series, Software Configuration Manual

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Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS 15.2(5)Ex
Chapter 2 Command-Line Interfaces
ROMMON Command-Line Interface
To log in to the standby supervisor engine using a virtual console, enter the following command:
Switch# session module 2
Connecting to standby virtual console
Type "exit" or "quit" to end this session
Switch-standby-console# exit
If the standby console is not enabled, the following message appears:
Switch-standby-console#
Standby console disabled.
Valid commands are: exit, logout
Virtual session into the standby console is N/A with RPR:
Switch#
session module 2
IPC server port name IFConsoleServer:2 not registered on standby.
Secondary cannot be accessed by virtual console
Note
The standby virtual console provides the standard features that are available from the supervisor console
such as command history, command completion, command help and partial command keywords.
The following limitations apply to the standby virtual console:
• All commands on the virtual console run to completion. It does not provide the auto-more feature;
it behaves as if the
terminal length 0 command has been executed. It is also noninteractive. A
executing command cannot be interrupted or aborted by any key sequence on the active supervisor
engine. If a command produces considerable output, the virtual console displays it on the supervisor
screen.
•
The virtual console is noninteractive. Because the virtual console does not detect the interactive
nature of a command, any command that requires user interaction causes the virtual console to wait
until the RPC timer aborts the command.
•
The virtual console timer is set to 60 seconds. The virtual console returns to its prompt after 60
seconds. During this time, you cannot abort the command from the keyboard. You must wait for the
timer to expire before you continue.
•
You cannot use virtual console to view debug and syslog messages that are being displayed on the
standby supervisor engine. The virtual console only displays the output of commands that are
executed from the virtual console. Other information that is displayed on the real standby console
does not appear on the virtual console.
ROMMON Command-Line Interface
ROMMON is a ROM-based program that is involved at power-up or reset, or when a fatal exception error
occurs. The switch enters ROMMON mode if the switch does not find a valid software image, if the
NVRAM configuration is corrupted, or if the configuration register is set to enter ROMMON mode.
From the ROMMON mode, you can load a software image manually from flash memory, from a network
server file, or from bootflash.
You can also enter ROMMON mode by restarting the switch and pressing Ctrl-C during the first five
seconds of startup.
Note
Ctrl-C is always enabled for 60 seconds after you reboot the switch, even if Ctrl-C is configured to be
off in the configuration register settings.