CHAPTER
3-1
Cisco 7401ASR Installation and Configuration Guide
OL-5419-01 B0
3
Starting and Configuring
This chapter describes how to start the system and perform a basic configuration for your
Cisco 7401ASR router. The chapter contains the following sections:
•Functional Overview, page 3-1
•Checking Conditions Prior to System Startup, page 3-9
•Starting the System and Observing Initial Conditions, page 3-9
•Configuring a Cisco 7401ASR Router, page 3-10
•Performing Other Configuration Tasks, page 3-21
•Replacing or Recovering a Lost Password, page 3-22
•Viewing Your System Configuration, page 3-25
•Performing Complex Configurations, page 3-27
This chapter guides you through a basic router configuration, whi c h is sufficient for you to access your
network. Complex configuration procedures are beyond the scope of thi s pub lica tio n and c an b e fou nd
in the modular configuration and modular command reference publications in the CiscoIOS software
configuration documentation set that corresponds to the software rel eas e inst all ed o n your C isco
hardware.
To configure a Cisco 7401ASR router from a console, you need to connect a t e rmi nal t o th e rou ter
console port.

Functional Overview

This section provides a functional overview of the Cisco 7401ASR router. It describes the numbering
and addressing scheme of the port adapter for the router, the environmental monitoring and reporting
functions, and online insertion and removal (OIR). These descriptions help you become familiar w ith
the capabilities of the Cisco7401ASR router.

Chassis Slot and Logical Interface Numbering

In the Cisco 7401ASR router, the port-adapter-slot-number is the chassis slot in which a port adapter is
installed, whereas the logical-interface-number is the physical location of the interface port on a port
adapter.
The port adapter slot in the Cisco 7401ASR router is numbered slot 1. Port adapter slot 0 is always
reserved for logical slots 10 |100|1000 on the system board.