configuring network devices

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

Configuring Network Devices

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

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

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.


Initial ISR Router Configuration ISR combines routing, LAN switching, security,

voice, and WAN connectivity features


Initial ISR Router Configuration Cisco IOS software modules are called images

IP Base image: entry-level Cisco IOS

Images are specific to models of devices


Initial ISR Router Configuration Tools and equipment required for setup:


Initial ISR Router ConfigurationThree-stage bootup process:

Power-on self test (POST)

Locate and load Cisco IOS

Locate startup configuration file or enter setup mode


Initial ISR Router ConfigurationVerifying and troubleshooting bootup process: View output from the show version

command Use dir flash: and boot flash: in ROMmon

mode View boot system commands


Initial ISR Router Configuration Out-of-band management for initial configuration

In-band management over a network connection


Initial ISR Router Configuration 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


Using Cisco SDM Express and SDMEight SDM Express configuration screens:

Overview

Basic configuration

LAN IP address

DHCP

Internet (WAN)

Firewall

Security settings

Summary


Using Cisco SDM Express and SDM Use Basic NAT Wizard to configure dynamic

NAT with PAT


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


Configuring a Router Using IOS CLI Configuration modes can alter the operation of

the device


Configuring a Router Using IOS CLIHelp features:

Command completion

Error indicators

Command history

Arrow and function keys


Configuring a Router Using IOS CLI Show commands display configuration and

operation information


Configuring a Router Using IOS CLI Use Cisco IOS CLI to perform an initial router

configuration


Configuring a Router Using IOS CLI Configure serial and Ethernet interfaces on a

router


Configuring a Router Using IOS CLI Configure a default route for the Cisco router


Configuring a Router Using IOS CLI Configure a Cisco router to function as a DHCP

server


Configuring a Router Using IOS CLI Configure static NAT on a Cisco router to

enable Internet access for an internal server


Configuring a Router Using IOS CLI Back up and restore configuration files using a

TFTP server


Configuring a Router Using IOS CLI 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


Connecting the CPE to the ISP Use inventory and configuration checklists and

an installation plan to ensure successful installation


Connecting the CPE to the ISP Documentation includes diagrams, checklists,

and activity logs


Connecting the CPE to the ISP Types of customer connections over a WAN:

Point-to-point

Circuit-switched

Packet-switched


Connecting the CPE to the ISP Bandwidth and cost influence WAN choices


Connecting the CPE to the ISP 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


Initial Cisco 2960 Switch Configuration Check switch components

Connect cables to the switch

Power up the switch and observe POST


Initial Cisco 2960 Switch Configuration Switch settings can be configured using the

Cisco IOS CLI

Assign an IP address to the default management virtual local area network, VLAN1


Initial Cisco 2960 Switch Configuration Connect the stand-alone LAN switch to the

router and verify connectivity

Configure port security to prevent unauthorized use

Shut down unused ports


Initial Cisco 2960 Switch Configuration 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.

configuring network devices

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