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

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

Initial ISR Router Configuration 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

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 SDM Eight 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 CLI Help 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.