Cisco routers and switches are the cornerstones of many networks. But when things break, repairs can intimidate even the most competent administrator. Luckily, just knowing the "in case of emergency" basics will take you far.Just like the original, this second edition of the highly acclaimed Cisco Routers for the Desperate is written for the administrator in crisis mode. Updated to cover switches and the latest Cisco terminology, with a tighter focus on the needs of the small network administrator, this second edition gives you what you need to know to provide reliable network services and fix problems fast. You'll find coverage of: Installation—how to get your router and network connections up and running right the first time Troubleshooting routers and switches, so that you can determine whether your hardware or the Internet is broken Security concerns, like how to keep your network equipment safe from hackers and install a private network between two offices How to implement basic network redundancy to reduce the risk of network downtime Cisco Routers for the Desperate, 2nd Edition is designed to be read once and left alone until something breaks. When it does, you'll have everything you need to know in one easy-to-follow guidebook.
Author(s): Michael W. Lucas
Edition: Second Edition
Publisher: No Starch Press
Year: 2009
Language: English
Pages: 147
Cisco Routers for the Desperate: Router and Switch Management, the Easy Way, Second Edition......Page 1
Introduction......Page 14
What This Book Will Teach You......Page 15
Where You Can Learn the Rest......Page 16
Unpacking the Router......Page 17
Other Router Ports......Page 18
Power-On......Page 19
1: Befriending the Command Line
......Page 20
Integrated Help......Page 21
Command Abbreviation......Page 23
2: Router Configuration
......Page 24
Running versus Startup......Page 25
Running Configuration......Page 26
Reading a Configuration......Page 27
Configuring the Router......Page 28
Backing Up Router Configurations......Page 29
3: Router Interfaces
......Page 30
Common Interface Characteristics......Page 31
Ethernet Interfaces......Page 33
Configuring Ethernet Interfaces......Page 35
Configuring Serial Interfaces......Page 37
Loopback Interfaces......Page 38
Null Interfaces......Page 39
4: Wide Area Network Connections
......Page 40
Choosing an ISP......Page 41
ISP Router Configuration......Page 42
Private Connections......Page 44
Choosing Equipment......Page 45
Ordering Circuits......Page 46
Private Circuit IP Addresses......Page 48
Routing Configuration......Page 50
Plugging It All Together......Page 52
Router Crashes......Page 54
Network Failure......Page 55
Initial Circuit Tests......Page 56
Circuit Design......Page 58
Examining the Circuit......Page 59
Interface Debugging Information......Page 61
Extended Pings and Circuit Troubleshooting......Page 63
Phoning the ISP......Page 66
Circuit Loopback Tests......Page 67
If It’s Your Problem......Page 68
6: IOS Changes
......Page 70
Upgrade Preparations......Page 71
Choosing Your IOS Version......Page 72
Copying Files......Page 73
IOS Installation......Page 75
Disaster Recovery......Page 76
7: Redundancy with BGP and HSRP
......Page 78
BGP Basics......Page 79
What BGP Isn’t......Page 80
Router Features......Page 81
Getting an ASN......Page 82
Routing Registries......Page 84
Your Address Announcements......Page 85
A Complete BGP Configuration......Page 87
Managing BGP......Page 88
Viewing Routes......Page 89
Resetting BGP......Page 90
Load Balancing BGP......Page 91
Hot Standby Router Protocol......Page 94
What Is HSRP?......Page 95
Tuning HSRP......Page 96
BGP and HSRP......Page 97
Testing HSRP......Page 98
8: Cisco Switches
......Page 100
Spanning Tree......Page 101
Configuring Switch Interfaces......Page 102
Cisco Discovery Protocol......Page 103
Viewing ARP Caches and Finding Hosts......Page 104
Finding Host Connections......Page 105
Lines......Page 108
Passwords......Page 110
Usernames......Page 112
Remote Router Access......Page 113
Enabling SSH......Page 114
10: Cisco Network Services
......Page 116
Basics of NTP......Page 117
Configuring NTP......Page 118
Local Logging......Page 119
Syslog Basics......Page 120
SNMP......Page 121
What Is an IP Address?......Page 124
Netmasks and BGP......Page 126
Index
......Page 128
Updates
......Page 145
