Avaya Configuring IP Exterior Gateway Protocols (BGP and EGP) Manual do Utilizador descarregar pdf (Página 21)

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1-1

Chapter 1

Exterior Gateway Protocols (BGP/EGP)

The following topics introduce concepts and terminology used in this guide:

What Gateway Protocols Do

LANs and WANs interconnected by IP routers form a group of networks called an

internet. For administrative purposes, an internet is divided into routing domains

called autonomous systems. An autonomous system (AS) is simply a collection of

routers (called gateways in IP terminology) and hosts. Each autonomous system

has its own unique AS number assigned by the appropriate Network Information

Center entity. Figure 1-1

depicts a sample internet segmented into three

autonomous systems.

Topic Page

What Gateway Protocols Do

1-1

Border Gateway Protocol (BGP) 1-3

Exterior Gateway Protocol (EGP) 1-3

Classless Interdomain Routing 1-4

1 2 ... 16 17 18 19 20 21 22 23 24 25 26 ... 307 308

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