1-CN_IT2050-Overview - NEW Lecture 01 Introduction to Routers PDF

Lecture 01 Introduction to Routers Module Code | Module Name | Lecture Title | Lecturer Module Delivery Per Week 2hr Lecture 1hr Tutorial 2hr Practical session ( once in 2 weeks) Module delivery clarifications Within the lecture, tutorial and l...

Lecture 01 Introduction to Routers Module Code | Module Name | Lecture Title | Lecturer Module Delivery Per Week 2hr Lecture 1hr Tutorial 2hr Practical session ( once in 2 weeks) Module delivery clarifications Within the lecture, tutorial and lab sessions Panel of Lecturers Mr.Dhammika De Silva - Metro IT2050| Computer Networks | Introduction to Routers| Hansika Mahaadikara Module Assessment Criteria Continues Assessments – 40 % Online practical Exam 1 - 1 hr - ( week 5) – 10 % Online practical Exam 2 - 1 hr - ( week 12) – 10 % Mid Online - 1 hr - ( week 8) - 20 % Final Examination – 60% IT2050| Computer Networks | Introduction to Routers| Hansika Mahaadikara Recommended Books IT2050| Computer Networks | Introduction to Routers| Hansika Mahaadikara Lecture 1 Overview of Configuration of Network Devices IT2050| Computer Networks | Introduction to Routers| Hansika Mahaadikara Network Devices – Internal Components CPU Buses RAM ROM Flash Interfaces NVRAM Power Supply IT2050| Computer Networks | Introduction to Routers| Hansika Mahaadikara Cisco IOS Software As with a computer, a network device cannot function without an operating system. Cisco calls its OS as the Cisco Internetwork Operating System or Cisco IOS. IT2050| Computer Networks | Introduction to Routers| Hansika Mahaadikara Command Line Interface (CLI) The Cisco IOS software uses a command-line interface (CLI) as the traditional console environment. This environment is accessible through several connection methods: Console AUX port Telnet IT2050| Computer Networks | Introduction to Routers| Hansika Mahaadikara  Dial-up Device Modem IT2050| Computer Networks | Introduction to Routers| Hansika Mahaadikara User Level Passwords IT2050| Computer Networks | Introduction to Routers| Hansika Mahaadikara Router Modes IT2050| Computer Networks | Introduction to Routers| Hansika Mahaadikara Router Modes IT2050| Computer Networks | Introduction to Routers| Hansika Mahaadikara Router Modes IT2050| Computer Networks | Introduction to Routers| Hansika Mahaadikara Router Modes IT2050| Computer Networks | Introduction to Routers| Hansika Mahaadikara Router Memory IT2050| Computer Networks | Introduction to Routers| Hansika Mahaadikara Router Memory cont. RAM - Store running or active configuration file - Loses content when router is powered down - A working storage ROM - Read-Only Memory - Stores bootable IOS image and bootstrap program IT2050| Computer Networks | Introduction to Routers| Hansika Mahaadikara Router Memory cont. NVRAM - Provides storage for the startup configuration file - Retains content when router is powered down Flash memory - Holds the fully functional IOS image - Retains content when router is powered down - Is a type of electronically erasable, programmable ROM (EEPROM) IT2050| Computer Networks | Introduction to Routers| Hansika Mahaadikara Router Memory cont. Bootup program startup-config Bootable IOS running-config IOS IT2050| Computer Networks | Introduction to Routers| Hansika Mahaadikara Displaying configuration files show running-config show startup-config IT2050| Computer Networks | Introduction to Routers| Hansika Mahaadikara  Managing configuration files Copy Command - copy files in a router (configuration file, new version of the IOS Software) - Move configuration files among RAM, NVRAM, and TFTP server IT2050| Computer Networks | Introduction to Routers| Hansika Mahaadikara  copy running-config startup-config Router# copy startup-config running-config During bootup running-config startup-config Router# copy running-config startup-config Changes to the router are put in the running-config file. If the router loses power or reboots, everything in RAM is lost including the running-config file. To make sure the changes to the router’s configuration remain saved, you must copy the running-config from RAM into the startup-config into NVRAM: Router# copy running-config startup-config IT2050| Computer Networks | Introduction to Routers| Hansika Mahaadikara copy running-config startup-config cont. Router#copy running-config startup-config Destination filename [startup-config]? Building configuration... Router#show startup-config ! version 12.0 service timestamps debug uptime The startup-config file now identical service timestamps log uptime no service password-encryption to running-config and the router will ! also have these changes if the router hostname Router ! reboots. ! ip subnet-zero ! interface Ethernet0 no ip address no ip directed-broadcast shutdown ! IT2050| Computer Networks | Introduction to Routers| Hansika Mahaadikara running-config startup-config IOS copy tftp startup-config copy tftp running-config copy tftp flash copy flash tftp copy startup-config tftp copy running-config tftp IT2050| Computer Networks | Introduction to Routers| Hansika Mahaadikara IT2050| Computer Networks | Introduction to Routers| Hansika Mahaadikara