Todd Lammle's CCNA IOS Commands Survival Guide

by Lammle, Todd

• ISBN13: 9780470175606
• ISBN10: 0470175605
• Edition: 1st
• Format: Paperback
• Copyright: 2007-11-28
• Publisher: Sybex

Summary

To become a Cisco Certified Network Associate (CCNA), you must learn the hundreds of IOS commands used by Cisco routers and switches. This handy reference from Cisco networking authority Todd Lammle is just what you need to master those commands. From a thorough introduction to Cisco's basic operating system to making the transition to IPv6, Todd Lammle walks you through hundreds of commands with short, to-the-point explanations and plenty of figures and real-world examples.

Author Biography

Todd Lammle, CCSI, CCNA, CCNP, CCSP, CCVP, MCSE, CEH, CHFI, FCC RF Licensed, is a leading authority on Cisco networking. He is President of GlobalNet Training, Inc, a networking integration andtraining firm based in Dallas, and CEO of RouterSim, LLC. Todd is the bestselling author of numerous Cisco books, including the popular CCNA: Cisco Certified Network Associate Study Guide, with over 200,000 copies in print. He can be reached at www.lammle.com.

Table of Contents

Introduction	p. xiii
Basic IOS Commands	p. 1
Booting the Router	p. 2
Setup Mode	p. 4
Router Configuration Modes	p. 4
Editing and Help Features	p. 6
Configuring a Router	p. 9
Hostnames	p. 9
Banners	p. 9
Passwords	p. 10
Router Interfaces	p. 14
Using the show Command	p. 18
Managing a Cisco Internetwork	p. 21
Understanding the Internal Components of a Cisco Router	p. 22
Managing the Configuration Register	p. 23
Checking the Current Configuration Register Value	p. 24
Changing the Configuration Register	p. 24
Recovering Passwords	p. 26
Using Boot System Commands	p. 29
Backing Up and Restoring the Cisco IOS	p. 30
Verifying Flash Memory	p. 30
Backing Up the Cisco IOS	p. 31
Restoring or Upgrading the Cisco Router IOS	p. 32
Using the Cisco IOS File System (Cisco IFS)	p. 32
Backing Up and Restoring the Cisco Configuration	p. 35
Backing Up the Cisco Router Configuration	p. 35
Restoring the Cisco Router Configuration	p. 37
Erasing the Configuration	p. 38
Using the Cisco IOS File System to Manage Your Router's Configuration (Cisco IFS)	p. 38
Using Cisco Discovery Protocol (CDP)	p. 40
Getting CDP Timers and Holdtime Information	p. 40
Gathering Neighbor Information	p. 41
Gathering interface Traffic Information	p. 43
Gathering Port and Interface Information	p. 43
Using Telnet	p. 44
Telnetting into Multiple Devices Simultaneously	p. 45
Checking Telnet Connections	p. 46
Checking Telnet Users	p. 46
Closing Telnet Sessions	p. 47
Resolving Hostnames	p. 48
Building a Host Table	p. 49
Using DNS to Resolve Names	p. 51
Checking Network Connectivity and Troubleshooting	p. 52
Using the ping Command	p. 52
Using the traceroute Command	p. 53
Debugging	p. 53
Using the sh processes Command	p. 55
IP Routing	p. 57
Routing Basics	p. 58
Static Routing	p. 61
Default Routing	p. 63
Routing Protocol Basics	p. 65
Administrative Distances (ADs)	p. 65
Routing Information Protocol (RIP)	p. 66
RIP Timers	p. 67
Enabling RIP	p. 68
Holding Down RIP Propagations	p. 69
RIP Version 2 (RIPv2)	p. 69
Verifying RIP	p. 71
The show ip protocols Command	p. 71
The debug ip rip Command	p. 72
Enhanced IGRP (EIGRP) and Open Shortest Path First (OSPF)	p. 75
Understanding EIGRP Basics	p. 76
Configuring EIGRP	p. 77
Holding Down EIGRP Propagations	p. 77
Setting Maximum Paths and Hop Count	p. 78
Using Redistribution Commands	p. 79
Configuring Discontiguous Networks	p. 81
Load Balancing with EIGRP	p. 81
Using Route Authentication with EIGRP	p. 85
Verifying EIGRP	p. 86
Understanding Open Shortest Path First (OSPF) Basics	p. 90
Configuring OSPF	p. 91
Enabling OSPF	p. 92
Configuring OSPF Areas	p. 92
Verifying OSPF Configuration	p. 92
Using the show ip ospf Command	p. 94
Using the show ip ospf database Command	p. 95
Using the show ip ospf interface Command	p. 95
Using the show ip ospf neighbor Command	p. 96
Using the show ip protocols Command	p. 97
Debugging OSPF	p. 98
Layer-2 Switching and Spanning-Tree Protocol (STP)	p. 101
Switching Services	p. 102
Three Switch Functions at Layer 2	p. 103
Basic Switch Configurations	p. 104
Switch Security	p. 105
Spanning-Tree Operations	p. 107
Optimizing Spanning-Tree Operations	p. 108
EtherChannel	p. 112
Verifying Cisco Catalyst Switches	p. 114
Virtual LANs (VLANs)	p. 121
Understanding VLAN Basics	p. 122
Configuring VLANs	p. 122
Verifying VLAN Creation	p. 124
Assigning Switch Ports to VLANs	p. 124
Configuring Trunk Ports	p. 126
Configuring Inter-VLAN Routing	p. 130
Configuring VTP	p. 131
Telephony: Configuring Voice VLANs	p. 134
Configuring the Voice VLAN	p. 134
Security	p. 137
Perimeter Routers, Firewalls, and Internal Routers	p. 138
Recognizing Security Threats	p. 139
Using Cisco IOS Firewall	p. 140
Introduction to Access Lists	p. 141
Standard Access Lists	p. 143
Wildcard Masking	p. 145
Controlling VTY (Telnet) Access	p. 145
Extended Access Lists	p. 146
Named Access Lists	p. 151
Switch Port ACLs	p. 153
Time-Based ACLs	p. 156
Monitoring Access Lists	p. 158
Network Address Translation (NAT)	p. 161
When Do We Use NAT?	p. 162
Types of Network Address Translation	p. 163
NAT Names	p. 164
Static NAT Configuration	p. 165
Dynamic NAT Configuration	p. 166
PAT (Overloading) Configuration	p. 167
Simple Verification of NAT	p. 168
Configuring NAT Using SDM	p. 170
Cisco's Wireless Technologies	p. 175
Introducing Wireless Technology	p. 176
The 802.11 Standards	p. 178
Service Sets	p. 182
Wireless Security	p. 184
Configuring Cisco Wireless Using the IOS	p. 186
AP Configuration	p. 189
Configuring Cisco Wireless Using the SDM/HTTP	p. 190
Internet Protocol Version 6 (IPv6)	p. 199
Why Do We Need IPv6?	p. 200
IPv6 Addressing and Expressions	p. 201
Shortened Expression	p. 202
Configuring Cisco Routers with IPv6	p. 203
DHCPv6	p. 204
IPv6 Routing Protocols	p. 206
RIPng	p. 206
EIGRPv6	p. 207
OSPFv3	p. 208
Migrating to IPv6	p. 209
Dual Stacking	p. 210
6to4 Tunneling	p. 211
Verifying RIPng	p. 212
Verifying OSPFv3	p. 215
Wide Area Networks (WANs)	p. 219
Introduction to Wide Area Networks	p. 220
Defining WAN Terms	p. 221
WAN Support	p. 221
High-Level Data-Link Control (HDLC) Protocol	p. 224
Point-to-Point Protocol (PPP)	p. 225
Configuring PPP on Cisco Routers	p. 226
Configuring PPP Authentication	p. 227
Verifying PPP Encapsulation	p. 228
PPPoE Configuration	p. 233
Introduction to Frame Relay Technology	p. 235
Frame Relay Encapsulation Types	p. 236
Data Link Connection Identifiers (DLCIs)	p. 237
Local Management Interface (LMI)	p. 238
Frame Relay Implementation and Monitoring	p. 241
Cisco's Security Device Manager (SDM)	p. 249
Configuring Your Router to Be Set Up Through the SDM	p. 250
Using the SDM to Manage the Flash Memory	p. 259
Using the SDM to Back Up, Restore, and Edit the Router's Configuration	p. 262
Configuring LAN and Wan Interfaces and Verifying a Router Using SDM	p. 266
Configuring RIP on a Router with SDM	p. 272
EIGRP	p. 274
Configuring OSPF with the SDM	p. 275
Index	p. 279
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