Network Design & Analysis By Jonathan Pingilley

Autonomous System Referred to as a routing domain Unit of router policy (single or group of networks) Can be controlled by a single admin or a group Networks designed within an AS pass routing info to one another using an Interior Gateway Protocol (IGP) Autonomous systems share information with other AS using a Border Gateway Protocol (BGP)

Interior Gateway Protocols Distance-vector Link-state Routing Information Protocol RIP Ver. 2 Interior Gateway Routing Protocol Open Shortest Path First Intermediate system to intermediate system

Lab Overview

What’s the Purpose We want to make sure that in the case that one router goes down, a back up router is set in place so that a seamless transition from the “bad” router to the “good” router is made. Allows admins to control a single network or groups of networks from a single location. With this configuration we could essentially turn a router off while the other one takes over the responsibilities of routing. This is used by certain ISPs to ensure that they are always “up and running”.

How do we accomplish this? Quagga is a solution Routing software suite that provides implementations of OSPF, RIP, BGP, and several other protocols for UNIX platforms. This will allow us to utilize two Linux systems for routing purposes. Configuration of eBGP and iBGP will be required External and Internal

Deliverables Quagga: www.quagga.net  Install and configuration sample: http://www.youtube.com /watch?v=ek5IstTrnPk  An Introduction to the BGP Protocol: http://www.skullbox.net /bgp.php  BGP routing Process: http://www.youtube.com /watch?v=J9_KJUFCkFE Examine and take note of the AS w/(Quagga) setup process and explain the significance of this routing software. I would like to see some type of presentation or summary of the beginning pages of this lab guide.

References http://searchnetworking.techtarget.com/definition /autonomous-system