Exterior Gateway Protocol

(EGP) A protocol which distributes routing information to the routers which connect autonomous systems. The term "gateway" is historical, and "router" is currently the preferred term. There is also a routing protocol called EGP defined in STD 18, RFC 904. See also Border Gateway Protocol, Interior Gateway Protocol.

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EGP

(1) (Exterior Gateway Protocol) A broad category of routing protocols that are designed to span different autonomous systems. Contrast with IGP.

(2) (Exterior Gateway Protocol) The original exterior gateway routing protocol (see above), which was widely used in the U.S. Data Defense Network (DDN) and National Science Foundation Network (NSFNet). EGP was a distance vector protocol that used polling to retrieve routing information. EGP was superseded by BGP. See BGP and routing protocol.

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References in periodicals archive

In today's IP networks we have IGP-s (Interior Gateway Protocols) that work in Autonomous System (like RIP, OSPF, IS-IS, EIGRP) and we have only one Exterior Gateway Protocol, BGP (Border Gateway Protocol) that connects all Autonomous Systems and bind them into global network Internet.

Applicability of analytical tree search algorithms in network routing

The exterior gateway protocols are covered in volume two.

Routing TCP/IP; v.1, 2d ed

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