Cisco Systems 15530 Before You Begin

CHAPTER
2-1
Cisco ONS 15530 Configuration Guide and Command Reference
78-14227-01, Cisco IOS Release 12.1(10)EV2
2
Before You Begin
This chapter provides basic information about the CiscoONS 15530. This chapter includes the
following topics:
•About the CLI, page 2-1
•About Cisco IOS Command Modes, page 2-1
•Interface Naming Conventions, page 2-4
•Configuration Overview, page 2-7
About the CLI
You can configure the CiscoONS 15530 from the CLI (command-line interface) that runs on the syste m
console or terminal, or by using remote access.
To use the CLI, your terminal must be connected to the Cisco ONS 15530 through the console port or
one of the TTY lines. By default, the terminal is configured to a basic c onfiguration, which should work
for most terminal sessions.
About Cisco IOS Command Modes
The Cisco IOS user interface is divided into many different modes. The commands available to you
depend on which mode you are currently in. To get a list of the commands available in a given mode,
type a question mark (?) at the system prompt.
When you start a session on the system, you begin in user mode, also called E XEC mode. Only a limited
subset of the commands are available in EXEC mode. To have access to all commands, you must enter
privileged EXEC mode. Normally, you must type in a password to access privileged EXEC mode. From
privileged mode, you can type in any EXEC command or access global configuration mode. Most of t he
EXEC commands are one-time commands, such as show commands, which show the current
configuration status, and clear commands, which clear counters or interfaces. The EXEC commands are
not saved across system reboots or across processor switchovers.
You can monitor and control the standby processor with commands entered on the active processor. A
subset of EXEC and privileged EXEC commands are available through the sta ndby pr oces sor co nsole .
Note You can easily determine if you are accessing the active or the standby processor: The standby
processor has “sby-” prefixed to the command prompt.