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 Dynamic Routing
Configuring Dynamic Routing
In dynamic routing, the network protocol adjusts the path automatically based on network traffic or 
topology. Changes in dynamic routing are shared with other routers in the network.
The IP routing protocol can use the Routing Information Protocol (RIP) or the Enhanced...

  
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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 IP Enhanced IGRP
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
       i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS
inter area
       * - candidate default, U - per-user static route, o - ODR
       P -...

  
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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 Addressing Parameters
Verifying Your Configuration
To verify that you have properly configured IP Enhanced IGRP, enter the show ip route command and 
look for Enhanced IGRP routes signified by “D.” You should see a verification output like the example 
shown below.
router#show ip route
Codes:C - connected, S -...

  
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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 Addressing Parameters
NoteIf you want to use NAT with a Virtual-Template interface, you must configure a loopback interface.
For complete information on the NAT commands, see the Cisco IOS Release 12.2 documentation set. 
For more general information on NAT concepts, see Chapter 1, “Concepts.”
Configuration Example...

  
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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 Addressing Parameters
Verifying Your Configuration
To verify that you have properly configured NAT, enter the show ip nat statistics command. You should 
see a verification output like the example shown below.
router#show ip nat statistics 
Total active translations:45 (10 static, 35 dynamic; 45 extended)
Outside...

  
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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 Addressing Parameters
For complete information on the Easy IP commands, see the Cisco IOS Release 12.2 documentation set. 
For more general information on Easy IP (Phase 1) concepts, see Chapter 1, “Concepts.” 
Configuring Easy IP (Phase 2)
This section explains how to configure the Cisco 800 series routers as DHCP...

  
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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 DHCP
Configuring DHCP
The following sections describe how to configure the router as a DHCP client, server, or relay.
Configuring DHCP Client Support
Follow these steps to configure the router for DHCP client support:
Step 1Configure the BVI interface by entering the ip address dhcp client-id Ethernet 0 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
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Chapter 3      Basic Router Configuration
Configuring DHCP
interface Ethernet0
ip address 10.10.10.1 255.255.255.0
no ip directed-broadcast
ip nat inside
!
interface ATM0
no ip address
no ip directed-broadcast
no atm ilmi-keepalive
bundle-enable
hold-queue 208 in
!
interface ATM0.1 point-to-point
no ip directed-broadcast
pvc 1/100 
encapsulation aal5snap
!
bridge-group...

  
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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 DHCP
!
scheduler max-task-time 5000
end
Configuring DHCP Server
To configure the router as a DHCP server, use the following table, beginning in global configuration 
mode.
For more information on the features not used in this configuration, see the Cisco IOS DHCP Server 
feature module. For more general information...

  
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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 TACACS+
Configuring the DHCP Relay
This section describes how to configure the router to forward User Datagram Protocol (UDP) broadcasts, 
including IP address requests, from DHCP clients. 
To configure the DHCP relay, use the following table, beginning in global configuration mode.
For complete information on the...