Cisco Router 826 Routers Software Configuration Guide

  
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Cisco 826, 827, 828, 831, 836, and 837 and Cisco SOHO 76, 77, 78, 91, 96, and 97 Routers Software Configuration Guide
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Chapter 3      Basic Router Configuration
Configuring Basic Parameters
Configuring Global Parameters
Use the following table to configure the router for global parameters.
For complete information on the global parameter commands, see the Cisco IOS Release 12.2 
documentation set. 
Configuring the Ethernet Interface
To configure the Ethernet interface, use the following...

  
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Cisco 826, 827, 828, 831, 836, and 837 and Cisco SOHO 76, 77, 78, 91, 96, and 97 Routers Software Configuration Guide
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Chapter 3      Basic Router Configuration
Configuring Basic Parameters
!
interface Ethernet0
ip address 192.168.1.1 255.255.255.0
no ip directed-broadcast (default)
!
Verifying Your Configuration
To verify that you have properly configured the Ethernet interface, enter the show interface ethernet0 
command. You should see a verification output like the example shown...

  
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Cisco 826, 827, 828, 831, 836, and 837 and Cisco SOHO 76, 77, 78, 91, 96, and 97 Routers Software Configuration Guide
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Chapter 3      Basic Router Configuration
Configuring Basic Parameters
Configuration Example
The following example shows the dialer interface configuration. You do not need to input the commands 
marked “default.” These commands appear automatically in the configuration file generated when you 
use the show running-config command.
!
interface atm0
pvc 1/40
encapsulation...

  
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Cisco 826, 827, 828, 831, 836, and 837 and Cisco SOHO 76, 77, 78, 91, 96, and 97 Routers Software Configuration Guide
78-14565-03
Chapter 3      Basic Router Configuration
Configuring Basic Parameters
Sample Configuration
The loopback interface in this sample configuration is used to support NAT on the virtual-template 
interface. This sample configuration shows the loopback interface configured on the Ethernet interface 
with an IP address of 200.200.100.1/24, which acts as a static IP address....

  
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Cisco 826, 827, 828, 831, 836, and 837 and Cisco SOHO 76, 77, 78, 91, 96, and 97 Routers Software Configuration Guide
78-14565-03
Chapter 3      Basic Router Configuration
Configuring Basic Parameters
Configuring the Asynchronous Transfer Mode Interface
To configure the Asynchronous Transfer Mode (ATM) interface, use the following table, beginning in 
global configuration mode.
NoteThe default service class for configuring the ATM interface is unspecified bit rate (ubr). You can change 
the...

  
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Cisco 826, 827, 828, 831, 836, and 837 and Cisco SOHO 76, 77, 78, 91, 96, and 97 Routers Software Configuration Guide
78-14565-03
Chapter 3      Basic Router Configuration
Configuring Basic Parameters
no ip directed-broadcast (default)
no atm ilmi-keepalive (default)
pvc 8/35
encapsulation aal5snap
protocol ip 200.200.100.254 broadcast
!
Verifying Your Configuration
To verify that you have properly configured the ATM interface with AAL5SNAP encapsulation, enter 
the show interface atm0 command....

  
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Cisco 826, 827, 828, 831, 836, and 837 and Cisco SOHO 76, 77, 78, 91, 96, and 97 Routers Software Configuration Guide
78-14565-03
Chapter 3      Basic Router Configuration
Configuring Bridging
Configuring Command-Line Access to the Router
To configure parameters to control access to the router, use the following table, beginning in global 
configuration mode.
For complete information on the command line commands, see the Cisco IOS Release 12.2 
documentation set. 
Configuration Example
The...

  
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Cisco 826, 827, 828, 831, 836, and 837 and Cisco SOHO 76, 77, 78, 91, 96, and 97 Routers Software Configuration Guide
78-14565-03
Chapter 3      Basic Router Configuration
Configuring Bridging
To configure bridging, use the following table, beginning in global configuration mode.
For complete information on the bridging commands, see the Cisco IOS Release 12.2 documentation set. 
For more general concepts on bridging, see Chapter 1, “Concepts.”
Configuration Example
The following configuration...

  
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Cisco 826, 827, 828, 831, 836, and 837 and Cisco SOHO 76, 77, 78, 91, 96, and 97 Routers Software Configuration Guide
78-14565-03
Chapter 3      Basic Router Configuration
Configuring Bridging
The ATM interface has a PVC of 8/35, and the encapsulation is set to AAL5SNAP. The IP address is 
disabled for bridging and the IP directed broadcast is disabled, which prevents the translation of directed 
broadcasts to physical broadcasts. The bridge protocol is set to 1 to define the STP.
no ip routing...

  
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Cisco 826, 827, 828, 831, 836, and 837 and Cisco SOHO 76, 77, 78, 91, 96, and 97 Routers Software Configuration Guide
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Chapter 3      Basic Router Configuration
Configuring Static Routing
Configuring Static Routing
Static routes are routing information that you manually configure into the router. If the network topology 
changes, the static route must be updated with a new route. Static routes are private routes, unless they 
are redistributed by a routing protocol. Configuring static...