Basic Router Configuration
This chapter provides procedures for configuring the basic parameters of your Cisco router, including global parameter settings, routing protocols, interfaces, and command-line access. It also describes the default configuration on startup. Note that individual router models may not support every feature described throughout this guide. Features not supported by a particular router are indicated whenever possible.
This chapter contains the following sections:
•Interface Port Labels
•Viewing the Default Configuration
•Information Needed for Configuration
•Configuring Basic Parameters
•Configuring Static Routes
•Configuring Dynamic Routes
•Configuring Enhanced IGRP
Each section includes a configuration example and verification steps, as available.
For complete information on how to access global configuration mode, see the “Entering Global Configuration Mode” section in Appendix A, “Cisco IOS Basic Skills.” For more information on the commands used in the following tables, see the Cisco IOS Release 12.3 documentation set.
Interface Port Labels
Table 1 lists the interfaces supported for each router and their associated port labels on the equipment.
Table 1Supported Interfaces and Associated Port Labels by Cisco Router
Router
Interface
Port Label
Cisco 1801
Fast Ethernet LANs
SWITCH and FE8–FE5 (top), FE x and FE4–FE1 (bottom)
Fast Ethernet WANs
FE0
ATM WAN
ADSLoPOTS
Wireless LAN
LEFT, RIGHT/PRIMARY
BRI
ISDN S/T1-2
Cisco 1800 Series Integrated Services Routers (Fixed) Software Configuration Guide
OL-6426-02
Chapter 1 Basic Router Configuration
Viewing the Default Configuration
Viewing the Default Configuration
When you first boot up your Cisco router, some basic configuration has already been performed. All of the LAN and WAN interfaces have been created, console and VTY ports are configured, and the inside interface for Network Address Translation has been assigned. Use the show running-config command to view the initial configuration, as shown in Example 1.
NoteIf you are unable to view the initial configuration and you get a No Password Set error message, you must reset the initial password. For details, see the “Recovering a Lost Password” section in Chapter 14, “Troubleshooting”.
Cisco 1802
Fast Ethernet LANs
SWITCH and FE8–FE5 (top), FE x and FE4–FE1 (bottom)
Fast Ethernet WANs
FE0
ATM WAN
ADSLoISDN
Wireless LAN
LEFT, RIGHT/PRIMARY
BRI
ISDN S/T
Cisco 1803
Fast Ethernet LANs
SWITCH and FE8–FE5 (top), FE x and FE4–FE1 (bottom)
Fast Ethernet WANs
FE0
ATM WAN
G.SHDSL
Wireless LAN
LEFT, RIGHT/PRIMARY
BRI
ISDN S/T
Cisco 1811
Fast Ethernet LANs
SWITCH and FE9–FE6 (top), FE x and FE5–FE2 (bottom)
Fast Ethernet WANs
FE0–FE1
Wireless LAN
LEFT, RIGHT/PRIMARY
USB
1–0
V.92
MODEM
Cisco 1812
Fast Ethernet LANs
SWITCH and FE9–FE6 (top), FE x and FE5–FE2 (bottom)
Fast Ethernet WANs
FE0–FE1
Wireless LAN
LEFT, RIGHT/PRIMARY
BRI
ISDN S/T
USB
1–0
Table
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