Cisco Knowledge Suite Cisco SystemsCisco Press
   

   
Home
MyCKS
Cutting Edge
Certification
Core Reference
Guided Learning
   
Networking Architecture
LAN
WAN
Switching
Internet Protocols (IP)
Network Protocols
Transport and Application Protocols
Desktop Protocols
Security and Troubleshooting
Network Resources and Management
Integrated Services
 

Configuring On-Demand Routing

   

< Back Contents Next >

Configuring On-Demand Routing

  

 

On-Demand Routing Task List

  

 

Enable ODR

  

 

Filter ODR Information

  

 

Configure the Default Route

  

 

Redistribute ODR Information into the Hub's Dynamic Routing Protocol

  

 

Reconfigure CDP/ODR Timers

  

 

Use ODR with Dialer Mappings

Save to MyCKS

 
Cisco IOS 12.0 Solutions for Network Protocols, Volume I: IP

From: Cisco IOS 12.0 Solutions for Network Protocols, Volume I: IP
Author: Technologies Riva; Systems Cisco
Publisher: Cisco Press (53)
More Information

5. Configuring On-Demand Routing

This chapter describes how to configure On-Demand Routing (ODR). For a complete description of the ODR commands in this chapter, refer to Chapter 6, “On-Demand Routing Commands.” To locate documentation of other commands in this chapter, you can search online at www.cisco.com.

ODR is a feature that provides IP routing for stub sites with minimum overhead. The overhead of a general, dynamic routing protocol is avoided without incurring the configuration and management overhead of static routing.

A stub router can be thought of as a spoke router in a hub-and-spoke network topology, where the only router to which the spoke is adjacent is the hub router. In such a network topology, the IP routing information required to represent this topology is fairly simple. These stub routers commonly have a WAN connection to the hub router, and a small number of LAN network segments (stub networks) are directly connected to the stub router.

These stub networks might consist only of end systems and the stub router and, thus, do not require the stub router to learn any dynamic IP routing information. The stub routers can then be configured with a default route that directs IP traffic to the hub router.

To provide full connectivity, the hub router can be statically configured to know that a particular stub network is reachable via a particular stub router. However, if there are multiple hub routers, many stub networks, or asynchronous connections between hubs and spokes, statically configuring the stub networks on the hub routers becomes a problem.

On-Demand Routing Task List

Of the following tasks, the first three are required to configure On-Demand Routing and the remaining tasks are optional:

  • Enable ODR

  • Filter ODR Information

  • Configure the Default Route

  • Redistribute ODR Information into the Hub's Dynamic Routing Protocol

  • Reconfigure CDP/ODR Timers

  • Use ODR with Dialer Mappings

   

< Back Contents Next >

Save to MyCKS

 

Breaking News

One of the primary architects of OpenCable, Michael Adams, explains the key concepts of this initiative in his book OpenCable Architecture.

Expert Advice

Ralph Droms, Ph.D., author of The DHCP Handbook and chair of the IETF Dynamic Host Configuration Working Group, guides you to his top picks for reliable DHCP-related information.

Just Published

Residential Broadband, Second Edition
by George Abe

Introduces the topics surrounding high-speed networks to the home. It is written for anyone seeking a broad-based familiarity with the issues of residential broadband (RBB) including product developers, engineers, network designers, business people, professionals in legal and regulatory positions, and industry analysts.

             
     

From the Brains at InformIT

|

Contact Us

|

Copyright, Terms & Conditions

|

Privacy Policy

 

© Copyright 2000 InformIT. All rights reserved.