Exterior Gateway Protocol: Difference between revisions

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The term '''Exterior Gateway Protocol''' (often given as its acronym, '''EGP''') has two meanings: first, the generic one, meaning a [[routing protocol]] used in the [[TCP/IP]] [[protocol suite]] for providing the information needed for doing [[path selection]] between a connected group of [[Autonomous System]]s, and second, a specific [[protocol]] which was the first EGP.
The '''Exterior Gateway Protocol''' was a [[routing protocol]] used in the [[TCP/IP]] [[protocol suite]] for providing the information needed for doing [[path selection]] between a connected group of [[Autonomous System]]s, which was the first [[exterior gateway protocol]].


The EGP protocol is now obsolete, and no longer in use. It was a [[routing architecture|Destination Vector]] protocol; the data it carried was [[routing table]] entries.
It is now obsolete, and no longer in use. It was a [[routing architecture|Destination Vector]] protocol; the data it carried was [[routing table]] entries.


It did not have any mechanism for detecting and preventing [[routing loop]]s; EGP was only intended for use in networks in which the graph of AS connectivity did not contain any cycles. The current EGP, [[Border Gateway Protocol|BGP]] does not have this limitation.
It did not have any mechanism for detecting and preventing [[routing loop]]s; EGP was only intended for use in networks in which the graph of AS connectivity did not contain any cycles. The current EGP, [[Border Gateway Protocol|BGP]], does not have this limitation.


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[[Category: Networking]]
[[Category: TCP/IP Protocols]]

Latest revision as of 20:58, 13 December 2018

The Exterior Gateway Protocol was a routing protocol used in the TCP/IP protocol suite for providing the information needed for doing path selection between a connected group of Autonomous Systems, which was the first exterior gateway protocol.

It is now obsolete, and no longer in use. It was a Destination Vector protocol; the data it carried was routing table entries.

It did not have any mechanism for detecting and preventing routing loops; EGP was only intended for use in networks in which the graph of AS connectivity did not contain any cycles. The current EGP, BGP, does not have this limitation.