CCNA Discovery 2 - Chapter 5

Configuring Network
Devices

Working at a Small-to-Medium Business or ISP –
Chapter 5

Version 4.1 © 2007 Cisco Systems, Inc. All rights reserved. Cisco Public 1

Objectives
 Configure a router with an initial configuration.
 Use Cisco SDM to configure a Cisco ISR with LAN
connectivity, Internet connectivity and NAT.
 Configure a Cisco router for LAN connectivity, Internet
connectivity and NAT using the Cisco IOS CLI.
 Configure a WAN connection from customer premises
to an ISP.
 Describe, setup and configure a standalone LAN
switch.

© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public 2

Initial ISR Router Configuration
 ISR combines routing, LAN switching, security,
voice, and WAN connectivity features


 Cisco IOS software modules are called images
 IP Base image: entry-level Cisco IOS
 Images are specific to models of devices


 Tools and equipment required for setup:


Three-stage bootup process:
 Power-on self test (POST)
 Locate and load Cisco IOS
 Locate startup configuration file or enter setup
mode


Verifying and troubleshooting bootup process:
 View output from the show version command
 Use dir flash: and boot flash: in ROMmon
mode
 View boot system commands


 Out-of-band management for initial configuration
 In-band management over a network connection


 Command Line Interface (CLI): text-based
program
 Security Device Manager (SDM): web-based GUI


Using Cisco SDM Express and SDM
 Follow best practices for installing a new device
to ensure correct functions


Eight SDM Express configuration screens:
 Overview
 Basic configuration
 LAN IP address
 DHCP
 Internet (WAN)
 Firewall
 Security settings
 Summary


 Use Basic NAT Wizard to configure dynamic
NAT with PAT


Configuring a Router Using IOS CLI
 CLI command modes: two levels of access


 Configuration modes can alter the operation of
the device


Help features:
 Command completion
 Error indicators
 Command history
 Arrow and function keys


 Show commands display configuration and
operation information


 Use Cisco IOS CLI to perform an initial router
configuration


 Configure serial and Ethernet interfaces on a
router


 Configure a default route for the Cisco router


 Configure a Cisco router to function as a DHCP
server


 Configure static NAT on a Cisco router to
enable Internet access for an internal server


 Back up and restore configuration files using a
TFTP server


 Capture and save configuration file output from
a terminal session


Connecting the CPE to the ISP
 Configuration checklists ensure that all
configuration requirements are met


 Use inventory and configuration checklists and
an installation plan to ensure successful
installation


 Documentation includes diagrams, checklists,
and activity logs


Types of customer connections over a WAN:
 Point-to-point
 Circuit-switched
 Packet-switched


 Bandwidth and cost influence WAN choices


 Clock rate and serial encapsulation are needed
when configuring serial WAN connections


Initial Cisco 2960 Switch Configuration
 Fixed-configuration, standalone devices
 Configured using GUI or CLI


 Check switch components
 Connect cables to the switch
 Power up the switch and observe POST


 Switch settings can be configured using the
Cisco IOS CLI
 Assign an IP address to the default
management virtual local area network, VLAN1


 Connect the stand-alone LAN switch to the
router and verify connectivity
 Configure port security to prevent unauthorized
use
 Shut down unused ports


 Cisco Discovery Protocol (CDP) gathers
information about directly-connected Cisco
network devices
 Two Cisco devices directly connected on the
same local network are called neighbors


Summary
 The Integrated Services Router (ISR) is a good choice
for small to medium businesses and ISP-managed
customers.
 ISRs can be initially configured using SDM or the router
IOS CLI.
 When using the CLI, “show” commands verify
configuration elements.
 An installation plan can minimize disruption to a
network when new devices are being added.
 Documentation is necessary, both when configuring
and when installing network devices.
 Switches are assigned IP addresses by configuring
them on the management interface, VLAN 1.

CCNA Discovery 2 - Chapter 5

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CCNA Discovery 2 - Chapter 5