configuring network devices

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Configuring Network Devices

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

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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.

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

voice, and WAN connectivity features

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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

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Initial ISR Router Configuration Tools and equipment required for setup:

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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

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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

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

In-band management over a network connection

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Initial ISR Router Configuration Command Line Interface (CLI): text-based

program

Security Device Manager (SDM): web-based GUI

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Using Cisco SDM Express and SDM Follow best practices for installing a new device

to ensure correct functions

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Using Cisco SDM Express and SDMEight SDM Express configuration screens:

Overview

Basic configuration

LAN IP address

DHCP

Internet (WAN)

Firewall

Security settings

Summary

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

NAT with PAT

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

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

the device

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Configuring a Router Using IOS CLIHelp features:

Command completion

Error indicators

Command history

Arrow and function keys

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Configuring a Router Using IOS CLI Show commands display configuration and

operation information

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

configuration

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

router

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

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

server

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

enable Internet access for an internal server

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

TFTP server

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Configuring a Router Using IOS CLI Capture and save configuration file output from

a terminal session

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Connecting the CPE to the ISP Configuration checklists ensure that all

configuration requirements are met

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

an installation plan to ensure successful installation

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

and activity logs

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

Point-to-point

Circuit-switched

Packet-switched

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

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Connecting the CPE to the ISP Clock rate and serial encapsulation are needed

when configuring serial WAN connections

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Initial Cisco 2960 Switch Configuration Fixed-configuration, standalone devices

Configured using GUI or CLI

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Initial Cisco 2960 Switch Configuration Check switch components

Connect cables to the switch

Power up the switch and observe POST

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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

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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

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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

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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.

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