The process of router configuration can be thought of much like programming. This chapter details the fundamental building blocks of BGP router configuration. Task-oriented fragments of router configurations are given in this chapter with some advice on applicability and interaction with other fragments. Links are provided to the policy chapter as appropriate. No complete router configurations are given, but the following scenario chapters will contain complete configs.
Assume you know Details of setting up your serial interfaces (e.g. B8ZS, etc.) See Ballew or cisco docs if not.
This configuration directs all traffic that has no other explicit route toward an interface or host.
If reliability is a concern, static default routes should be used only in routers that have one path to reach all exits from your AS. See the section called Exit Selection and Static Default Routes in Chapter 7 for details.
ip route 0.0.0.0 0.0.0.0 Serial0/0
The interface destination form is used for point-to-point links because it avoids having to know the IP address of the remote end of the link (typically your ISP).
ip route 0.0.0.0 0.0.0.0 10.0.0.1
The host destination form is used on multi-access networks (e.g. Ethernet).
Copyright © 1999-2000 by Robert A. Van Valzah