Cisco Router 800 Series Software Configuration Guide

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Router Feature Configuration
This chapter includes basic feature-by-feature configuration procedures for 
Cisco 800 series and Cisco SOHO series routers. This chapter is useful if you 
have a network in place and you want to add specific features.
NoteEvery feature described is not necessarily supported on every router model. 
Where possible and applicable, feature limitations are listed.
If you prefer to use network scenarios to...

 
Chapter 7      Router Feature Configuration
Before You Configure Your Network
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Configuring a Single-PVC Environment Using RFC 1483 Encapsulation, 
page 7-40
Configuring Dial Backup, page 7-53
Configuring IGMP Proxy and Sparse Mode, page 7-60
Configuring IP Security and GRE Tunneling, page 7-63
Configuring Multilink PPP Fragmentation and Interleaving, page 7-70
Configuring Voice, page 7-73
Cisco 827 Router Configuration Examples, page...

 
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Chapter 7      Router Feature Configuration
Configuring Basic Parameters
If you are setting up an Internet connection, gather the following information: 
–Point-to-Point Protocol (PPP) client name that is assigned as your login 
name.
–PPP authentication type: Challenge Handshake Authentication Protocol 
(CHAP) or Password Authentication Protocol (PAP).
–PPP password to access your Internet Service Provider (ISP) account.
–DNS server IP...

 
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For complete information on how to access global configuration mode, see the 
“Entering Global Configuration Mode” section on page A-8. For more 
information on the commands used in the following tables, refer to the Cisco IOS 
Release 12.0 documentation set.
Configuring Global Parameters
Follow the steps below to configure the router for global parameters.
For complete...

 
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Chapter 7      Router Feature Configuration
Configuring Basic Parameters
For complete information on the Ethernet commands, refer to the 
Cisco IOS Release 12.0 documentation set. For more general information on 
Ethernet concepts, see Chapter 1, “Concepts.”
Configuration Example
The following example shows the Ethernet interface configuration. You do not 
need to enter the commands marked “default.” These commands appear 
automatically in...

 
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Configuring the Dialer Interface 
Use these commands if you are using PPP encapsulation for the ATM PVC. 
Follow the steps below to configure the dialer interface, beginning in global 
configuration mode.
Configuration Example
The following example shows the dialer interface configuration. You do not need 
to input the commands marked “default.” These commands appear...

 
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Chapter 7      Router Feature Configuration
Configuring Basic Parameters
dialer pool-member 1
!
interface dialer 0
ip address 200.200.100.1 255.255.255.0
encapsulation ppp
dialer pool 1
!
Verifying Your Configuration
To verify that you have properly configured the dialer interface, enter the show 
interface virtual-access 1 command. Both line protocol and dialer 0 should be up 
and running. You should see a verification output like the...

 
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Configuration Tasks
Follow the steps below to configure the loopback interface.
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...

 
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Chapter 7      Router Feature Configuration
Configuring Basic Parameters
Verifying Your Configuration
To verify that you have properly configured the loopback interface, enter the 
show interface loopback 0 command. You should see a verification output 
similar to the following example.
Router #sh int loopback 0
Loopback0 is up, line protocol is up 
  Hardware is Loopback
  Internet address is 200.200.100.1/24
  MTU 1514 bytes, BW 8000000...

 
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NoteThe default service class for configuring the ATM interface is unspecified bit rate 
(ubr). You can change the service class to variable bit rate non-real time (vbr-nrt) 
or variable bit rate real time (vbr-rt) by using one of these commands: vbr-nrt or 
vbr-rt. Refer to the Cisco IOS Release 12.0 documentation set. For more 
information on definitions of service...