
Configuring IP Exterior Gateway Protocols (BGP and EGP)
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Figure 1-1. An Internet Connecting Three Autonomous Systems
The routers at the edges (or borders) of autonomous systems are called gateways.
These gateways use exterior gateway protocols to exchange reachability
information and to route packets between routing domains. This guide describes
how to configure and use the Border Gateway Protocol (BGP) and the Exterior
Gateway Protocol (EGP). You do not have to configure BGP to use EGP or EGP
to use BGP.
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Autonomous
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IP0006A
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