CCNA Completo | Leccion 20 | Configuración básica de routers | Parte 1

Introduction to Basic Router Configuration

Overview of Operating Systems in Networking

• The tutorial series continues with lesson 20, focusing on basic router configuration and console access.

• All terminal devices and network intermediary devices require an operating system to function; the kernel interacts directly with hardware.

• The shell serves as the interface between applications and end-users, allowing interaction through command-line or graphical user interfaces.

Cisco IOS Variants

• Cisco IOS has been widely used across various models of routers and switches; newer versions like IOS XE replace classic IOS for enterprise equipment.

• IOS XR is prevalent in service provider equipment such as ASR 9000 routers, while NX-OS is designed for Nexus switches in data center environments.

Accessing the Router CLI

Methods of Accessing Console Interface

• Users can access a router's CLI via three methods: console port, Telnet protocol, or SSH protocol.

Connecting via Console Port

• The console port is a physical connection specifically designed for accessing the router's CLI.

• Three connection methods are discussed: traditional serial ports (DB9), modern USB ports, and hybrid connections using adapters.

Traditional Serial Connection

• Older PCs had RS232 serial ports connecting to RJ45 console ports on routers using rollover cables (DB9 to RJ45).

Modern USB Connections

• Most current PCs lack serial ports but have USB connections; newer Cisco routers include USB console ports (mini-B connector).

Driver Installation and Device Recognition

Ensuring Proper Connectivity

• A standard USB cable is needed for connection; software drivers must be installed for PC recognition of the Cisco device over USB.

Using Adapters for Compatibility

• If only RJ45 console ports are available on routers, a DB9 to USB converter is necessary to connect modern PCs lacking serial ports.

Terminal Emulation Software

Setting Up Terminal Emulation

• After physical connection, terminal emulation software is required to send commands from the PC to the router’s CLI.

Popular Terminal Emulators

Terminal Emulation and Router Configuration

Setting Up Terminal Emulation Software

• The discussion begins with the introduction of terminal emulation software, specifically mentioning Tera Term and Secure CRT as popular options for connecting to routers.

• A demonstration is provided on configuring the PuTTY terminal emulator to match the console port settings of a router. It emphasizes selecting "serial" in the configuration menu.

• Key serial line parameters are highlighted: 7 data bits, 9600 baud rate, 8 stop bits, no parity, and no flow control. These settings are crucial for establishing a successful connection.

• Once all parameters are entered correctly, users can click "Open" to initiate a connection to the router's command-line interface (CLI).

Additional Resources and Next Steps

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