Chapter 3 Installing the Router
Configuration Changes
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Cisco 12006 and Cisco 12406 Router Installation and Configuration Guide
OL-11497-03
chapter in the Security Configuration Guide. This document is part of the Cisco
IOS software configuration documentation set that corresponds to the Cisco IOS
software release installed on your Cisco hardware.
The enable secret password functionality is available for Cisco 12006 and
Cisco 12406 Routers. You must enter the correct password on the system console
to gain access to privileged-level commands. When you are running from the
ROM monitor, you can use the enable password, depending on your boot ROM
level.
For maximum security, the enable secret and the enable passwords should be
different. If you use the same password for both functions during the setup
process, the system accepts it but warns that you should enter a different
password.
An enable secret password can contain from 1 to 25 uppercase and lowercase
alphanumeric characters; an enable password can contain any number of
uppercase and lowercase alphanumeric characters. A number cannot be used as
the first character. Spaces, however, are valid password characters. For example,
two words is a valid password. Leading spaces are ignored, but trailing spaces are
recognized. Make a note of all passwords you set, and store that information in a
secure location for future reference.

Protocols

For complete information on protocol configuration for your router, refer to the
appropriate software configuration publications, which are listed in the “If You
Need More Information” section on page 3-82.
Configuring Network Interfaces
This section summarizes information about configuring the network interfaces for
the RP and the installed line cards by using the setup command utility or setup
command. Once configured, the RP and line cards can communicate with external
networks.
To configure the interface parameters for the RP and installed line cards, you need
the following information:
• Interface network addresses
• Subnet mask values