Rockwell Automation 1783-SR Stratix 5900 Services Router User Manual - Manual (Page 60)

60 Rockwell Automation Publication 1783-UM005A-EN-P - September 2013
Chapter 4 Configure the Stratix 5900 Services Router by Using CISCO IOS Command-line Interface (CLI)
How to Use CLI for the First
Time The following section introduces you to the Cisco Internetworking Operating
System (IOS) user to the IOS command line interface (CLI). This information
explains ho to use the IOS CLI to configure and manage an IOS router.
This table defines important terms and acronyms that are used throughout this
section.
CLI Architecture You can access a Cisco IOS router command line interface through either a
console connection, modem connection, or a telnet session. Regardless of the
connection method, access to the IOS command line interface is generally
referred to as an EXEC session.
As a security feature, Cisco IOS separates EXEC sessions into two different
access levels - user EXEC level and privileged EXEC level. User EXEC level lets
you access only a limited amount of basic monitoring commands. Privileged
EXEC level lets you access all router commands, for example, configuration and
management, and can be password protected to allow only authorized users the
ability to configure or maintain the router.
For example, when an EXEC session is started, a ‘Router>’ prompt appears. The
right arrow (>) in the prompt indicates that the router is at the user EXEC level.
The user EXEC level does not contain any commands that control (reload or
configure) the operation of the router. To list the commands available at the user
EXEC level, type a question mark (?) at the Router> prompt. This feature is
referred to as context sensitive help.
Critical commands, for example, configuration and management, require that
you be at the privileged EXEC level.
Follow these steps to change to the privileged EXEC level.
1. Type enable at the Router> prompt.
If an enable password is configured, the router prompts for that password.
When the correct enable password is entered, the router prompt changes
to ‘Router#’ indicating that the user is now at the privileged EXEC level.
Term Definition
Cisco IOS Cisco Internetworking Operating System
CLI Command Line Interface
EXEC Command line session to the router (could be console, modem, or telnet)
Flash Nonvolatile Memory used to store IOS software image
NVRAM Nonvolatile RAM used to store router configuration
RAM Random Access Memory