Cisco Switching Black Book

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CISCO

Switching


Black Book


Scan Odom H.rnson Nottingham


Cisco Switching Black Book……………………………………………………………………………………………………………….1


Introduction………………………………………………………………………………………………………………………………………4


Overview………………………………………………………………………………………………………………………………..4


Is This Book for You?……………………………………………………………………………………………………………..4


How to Use This Book;…………………………………………………………………………………………………………….4


The Black Book Philosophy……………………………………………………………………………………………………..5


Chapter 1: Network Switching Fundamentals…………………………………………………………………………………….6


In Depth…………………………………………………………………………………………………………………………………6


Physical Media and Switching Types…………………………………………………………………………………………6


A Bit of History………………………………………………………………………………………………………………………7


Networking Architectures…………………………………………………………………………………………………..7


The Pieces of Technology;………………………………………………………………………………………………………..9


Repeaters………………………………………………………………………………………………………………………..10


Hubs………………………………………………………………………………………………………………………………10


Bridges…………………………………………………………………………………………………………………………..11


Routers…………………………………………………………………………………………………………………………..13


Switches…………………………………………………………………………………………………………………………13


Network Design…………………………………………………………………………………………………………………….14


Collision Domains…………………………………………………………………………………………………………..15


Broadcast Domains………………………………………………………………………………………………………….16


Why Upgrade to Switches?……………………………………………………………………………………………….16


Switched Forwarding……………………………………………………………………………………………………….19


Switched Network Bottlenecks………………………………………………………………………………………….20


The Rule of the Network Road………………………………………………………………………………………….22


Switched Ethernet Innovations………………………………………………………………………………………………..23


Full-Duplex Ethernet;………………………………………………………………………………………………………23


Fast Ethernet;…………………………………………………………………………………………………………………..23


Gigabit Ethernet………………………………………………………………………………………………………………24


The Cisco IOS………………………………………………………………………………………………………………………24


Connecting to the Switch………………………………………………………………………………………………….25


Powering Up the Switch……………………………………………………………………………………………………25


The Challenges……………………………………………………………………………………………………………………..27


Today’s Trend……………………………………………………………………………………………………………………….27


Entering and Exiting Privileged EXEC Mode……………………………………………………………………………28


Entering and Exiting Global Configuration Mode……………………………………………………………………..28


Entering and Exiting Interface Configuration Mode…………………………………………………………………..28


Entering and Exiting Subinterface Configuration Mode……………………………………………………………..28


Saving Configuration Changes………………………………………………………………………………………………..29


Chapter 2: Basic Switch Configuration…………………………………………………………………………………………….30


In Depth……………………………………………………………………………………………………………………………….30


Command-Line Interfaces……………………………………………………………………………………………………..30


Campus Hierarchical Switching Model…………………………………………………………………………………….31


Access Layer…………………………………………………………………………………………………………………..32


Distribution Layer……………………………………………………………………………………………………………32


Core Layer……………………………………………………………………………………………………………………..33


Remote Network Monitoring;………………………………………………………………………………………………….33


Connecting to the Console Port……………………………………………………………………………………………….34


Console Cable Pinouts……………………………………………………………………………………………………..35


Console Connectors…………………………………………………………………………………………………………36


Chapter 2: Basic Switch Configuration


The RJ-45-to-AUX Port Console Connector Pinouts…………………………………………………………36


Switch IOSs………………………………………………………………………………………………………………………….38


The IOS Configuration Modes………………………………………………………………………………………….38


Limiting Telnet Access…………………………………………………………………………………………………………..39


Implementing Privilege Levels……………………………………………………………………………………………….39


Configuring an IOS-Based CLI Switch……………………………………………………………………………………39


Setting the Login Passwords……………………………………………………………………………………………..40

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