CSE 304 COMPUTER NETWORK LAB LECTURE 01 Md. Mamunur Rashid Akand Lecturer, Department of CSE, BUBT

Course Objective  Introducing with different CISCO products (Hardware and Software)  Installing and configuring networking devices (switches and routers)  Implementing different networking protocols in lab environment.  Gathering necessary skills and knowledge to install, operate and troubleshoot a small network.

Introduction  CISCO mainly manufactures different hardware devices for networking.  To operate these hardware, CISCO also provides some software.  The Popular CISCO software are – CISCO IOS, CISCO CAN, CISCO SDM.

CISCO Software CISCO IOS  Internetworking Operating System.  This is actually CISCO proprietary router and switch operating system.  Stored in the flash memory of CISCO device.

CISCO Software CISCO Device Manager  A web-based tool installed in switch and router by default.  To access this tool, one need to be connected with CISCO switch/router management IP from a computer within a network.  This is a part of IOS, stored in flash memory.

CISCO Software CISCO CNA  CISCO Network Assistant is JAVA based application used to monitor and manage CISCO switch and router from a central console.  Provides Graphical User Interface (GUI).  Stored in the hard disk of a computer.

CISCO Software CISCO SDM  Used to monitor and manage CISCO router from central console.  Provides GUI.

CISCO Software Software in ROM  POST(Power On Self Test): Soon after turning on the power of a CISCO device, this program runs to test the hardware installed.  Bootstrap Program: Just after the POST process, this program loads the IOS Boot image from the flash memory.  Boot Image: Subset of CISCO IOS. This image is needed to download the upgrades of CISCO IOS using TFTP.  ROM Monitor(ROMMON): Used to test and troubleshoot the configuration kept in ROM and flash memory of a CISCO device.

CISCO Hardware  CISCO Device memory: 1. Read Only Memory(ROM): Used to store the necessary programs required to start up a device. Everything preserved in this memory remains intact even after turning off the device. 2. Flash Memory: CISCO IOS is preserved in flash memory. This is non-volatile too. 3. Non Volatile Random Access Memory(NVRAM): Startup configuration is preserved here. 4. Random Access Memory(RAM): Running Configuration is preserved here. 5. Configuration Register: 2 bytes area of NVRAM, used to tell how the device start up will occur.

CISCO Device Configuration 1. Startup Configuration 2. Running Configuration Command used to save the running configuration as startup configuration – copy running-config startup-config

CISCO IOS Interface  CISCO IOS Command-Line-Interface(CLI): 1. Setup mode: Prompting user build running config. 2. User EXEC mode: “>” symbol is used. 3. Privileged EXEC mode: “#” symbol is used. Runs advanced commands. To enter this mode from user exec mode is- Switch>enable Switch#show running-config Switch#disable Switch#>

CISCO IOS Interface 4. Global Configuration Mode: used to configure the whole device. Switch>enable Switch#configure terminal Switch(config)#do show running-config 5. Specific Configuration Mode: to configure a specific component. Switch(config)#interface fastethernet 0/1

CISCO IOS Interface  Command shortcut  Command Line Error: Invalid Input, Ambigouas command, incomplete command.  Default answer: shows in […]  Component Activating/Deactivating  Context sensitivity help: using “?”  Knowing command argument

CISCO switch activities  Mac Table  Frame Flooding  Frame Forwarding  Frame Filtering  Avoiding loop

Startup Process of CISCO device 1. POST 2. BOOTUP 3. Loading IOS in RAM 4. Loading Startup configuration

Configuring CISCO switch/router  Naming a switch  Giving IP address  Giving IP default gateway  Setting password: console, auxiliary, VTY Switch(config)#password pass Switch(config)#enable secret pass Switch(config)#line console 0 Switch(config-line)#password pass  Setting banner: Switch(config)#banner motd # Welcome to network lab#  Showing running and startup config  Erase startup-config