Comparing IGPs
What is an IGP in the first place? All the routing protocols mentioned so far in this chapter happen to be categorized as Interior Gateway Protocols (IGPs) rather than as Exterior Gateway Protocols (EGPs). First, the term gateway was used instead of router in the early days of IP routing, so the terms IGP and EGP really do refer to routing protocols. The designers of some routing protocols intended the routing protocol for use inside one company or organization (IGP), with other routing protocols intended for use between companies and between Internet service providers (ISPs) in the Internet (EGPs).
This chapter falls back to using the term IGP when talking about all the routing protocols mentioned in this chapter.
When deploying ...
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