Cisco Systems 4840G User Manual

CHAPTER

3

Configuring the Catalyst 4840G Processor

This chapter describes how to configure the Catalyst 4840G processor so it can be accessed by other
devices. For further information about the commands used in this chapter, see Appendix A, “Command
Reference.”

This chapter includes the following sections:

• Before Starting Up the Catalyst 4840G, page 3-1

• Configuring the Management Port, page 3-3

• Displaying the Operating Configuration, page 3-4

• Enabling Fast Ethernet Client, page 3-4

• Configuring a Host Name, page 3-5

• Using Flash PC Cards, page 3-5

Note You are at Step 2 in the suggested procedure for configuring your Catalyst 4840G switch.

See the “Switch Configuration Steps” section on page 2-1.

Before Starting Up the Catalyst 4840G

Before starting up the Catalyst 4840G switch, you should verify the following:

• The cables are connected to the switch.

• A console terminal is connected to the switch.

For instructions, refer to the Catalyst 4840G Chassis Installation Guide.

When you start up the switch, the CLI prompts you whether to enter the initial configuration dialog.
Answer no to this prompt:

Would you like to enter the initial dialog? [yes]: no

You see the following user EXEC prompt:

SLB-Switch>

You can now begin configuring the SLB switch.

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Chapter 3 Configuring the Catalyst 4840G Processor

Before Starting Up the Catalyst 4840G

Using the Console Port or a Management Port

You can configure the Catalyst 4840G switch from a direct console connection to the console port or
remotely through its management port.

• If you are using a direct console connection, configure your terminal emulation program for

9600 baud, 8 data bits, no parity, and 1 stop bit.

• If you are using an Ethernet interface as a management port interface, you must assign an IP address

to the interface.

For interface configuration instructions, see the “Configuring the Management Port” section on
page 3-3.

For further details on configuring ports and lines for management access, refer to the Cisco IOS
Configuration Fundamentals Configuration Guide.

Connecting a Modem

You can connect a modem to the console port on the Catalyst 4840G SLB switch. The following settings
on the modem are required:

• Enable auto answer mode

• Suppress result codes

You can configure your modem by setting the DIP switches on the modem or by connecting the modem
to terminal equipment. Refer to the user manual provided with your modem for the correct
configuration information.

Note Because there are no hardware flow control signals available on the console port, the

console port terminal characteristics should match the modem settings.

For further details on configuring ports and modems for management access, refer to the Cisco IOS
Configuration Fundamentals Configuration Guide and Dial Solutions Configuration Guide.

Using Passwords

You can configure both an enable password and an enable secret password. For maximum security, the
enable password should be different from the enable secret password.

• The enable password

The enable password is a nonencrypted password. It can contain any number of uppercase and
lowercase alphanumeric characters. Give the enable password only to users permitted to make
configuration changes to the SLB switch.

• The enable secret password

The enable secret password is a secure, encrypted password. On systems running Cisco IOS
software, you must type in the enable secret password before you can access global configuration
mode. You must type in the enable secret password to access boot ROM software.

An enable secret password can contain from 1 to 25 uppercase and lowercase alphanumeric
characters. The first character cannot be a number. Spaces are valid password characters. Leading
spaces are ignored; trailing spaces are recognized.

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Chapter 3 Configuring the Catalyst 4840G Processor

Configuring the Management Port

The management port on the Catalyst 4840G SLB switch allows multiple simultaneous Telnet or SNMP
network management sessions. Because there is no separate management port on the switch, you can
configure any Fast Ethernet or Gigabit Ethernet port as a management port.

Note Any Fast Ethernet interface (fastethernet 1 through 40), and any Gigabit Ethernet interface

(gigabitethernet 41 or 42) on the Catalyst 4840G SLB switch can be configured as a
management port. After you have configured an interface as a management port, you
cannot route or bridge traffic to the other Ethernet ports on the switch from this
management port.

You can remotely configure the Catalyst 4840G SLB switch through the management port, but first you
must configure an IP address so that the switch is reachable. You can configure the management port
interface two ways: manually from the command-line interface (CLI) or by copying the configuration
from the BOOTP server into NVRAM.

Before you begin to configure the management port interface manually, obtain the IP address and IP
subnet mask of the SLB switch. Also, make sure the console cable is connected to the console port.

You can configure the management port from an IP connected network. To obtain remote management
access using Telnet, perform this task:

Configuring the Management Port

Step 1

Step 2

Step 3

Step 4

Step 5

Step 6

Step 7

Step 8

Command Purpose

SLB-Switch> enable
SLB-Switch#

Enter privileged EXEC configuration mode. You can also
abbreviate the command to ena.

The

SLB-Switch# prompt indicates that you are in privileged

EXEC configuration mode.

SLB-Switch# configure terminal
SLB-Switch(config)#

Enter global configuration mode. You can also abbreviate the
command to config t.

The

SLB-Switch(config)# prompt indicates that you are in

global configuration mode.

SLB-Switch# enable
password password

SLB-Switch(config)# enable
secret password

Set the enable password.

Enter an enable secret password. Once set, a user must enter
the enable secret password to gain access to global
configuration mode.

SLB-Switch(config)# interface
[fastethernet 1-40 |
gigabitethernet 41-42]
SLB-Switch(config-if)#

SLB-Switch(config-if)# ip address

ip-address subnetmask

SLB-Switch(config-if)# no shutdown

SLB-Switch(config-if)# exit
SLB-Switch(config)#

Enter interface configuration mode on the interface.

Enter the IP address and IP subnet mask for the interface.

Enable the interface.

Return to global configuration mode.

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