Cisco Systems Router 1800 Series User Manual

 
PART 1
Getting Started 

CH A P T E R
 
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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...

 
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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...

 
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Chapter 1      Basic Router Configuration
  Viewing the Default Configuration
Example 1 Cisco 1812 Default Configuration on Startup
version 12.3
service timestamps debug datetime msecservice timestamps log datetime msec
no service password-encryption
!hostname Router
!
boot-start-markerboot-end-marker
!
mmi polling-interval 60no mmi auto-configure
no mmi pvc
mmi snmp-timeout 180no aaa new-model
ip...

 
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Chapter 1      Basic Router Configuration
  Information Needed for Configuration
interface FastEthernet8 no ip address
 shutdown
!interface FastEthernet9
 no ip address
 shutdown!
interface Vlan1
 no ip address!
ip classless
!no ip http server
no ip http secure-server
!control-plane
!
line con 0line aux 0
line vty 0 4
!no scheduler allocate
end
Information Needed for Configuration
You need to gather some...

 
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Chapter 1      Basic Router Configuration
  Configuring Basic Parameters
AAL5SNAP—This can be either routed RFC 1483 or bridged RFC 1483. For routed RFC 1483, 
the service provider must provide you with a static IP address. For bridged RFC 1483, you may 
use DHCP to obtain your IP address, or you may obtain a static IP address from your service 
provider.
AAL5MUX PPP—With this type of encapsulation, you...

 
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Chapter 1      Basic Router Configuration
  Configuring  Basic Parameters
Configure Global Parameters
Perform these steps to configure select ed global parameters for your router:
CommandPurpose
Step 1configure terminal
Example:
Router> enable
Router# configure terminal
Router(config)# 
Enters global configuration mode, when using the 
console port.
If you are connecting to the router using a remote...

 
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Chapter 1      Basi c Router Configuration
  Configuring Basic Parameters
Configure WAN Interfaces
The Cisco 1811 and Cisco 1812 routers each have two Fast Ethernet interfaces for WAN connection. The 
Cisco
 1801, Cisco 1802, and Cisco 1803 routers each have one ATM interface for WAN connection.
Based on the router model you have, configure the WAN interface(s) using one of the following 
procedures:...

 
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Chapter 1      Basic Router Configuration
  Configuring  Basic Parameters
Configure the ATM WAN Interface
This procedure applies only to the Cisco 1801, Cisco 1802, and Cisco 1803 models.
Perform these steps to configure the ATM interface, beginning in global configuration mode:
CommandPurpose
Step 1For the Cisco 1803 only:
controller dsl 0 
mode atm 
exit
Example:
Router(config)#  controller dsl 0...