A CDE Definition
A feature in the BGP router protocol that identifies flapping routes by adding a penalty value to the route each time it flaps (changes between available and unavailable). When the penalty reaches a preset limit, the route is no longer advertised to other routers as a valid path. See BGP.
(1) See also BPG.
(2) (Border Gateway Protocol) The routing protocol that is used to span autonomous systems on the Internet. It is a robust, sophisticated and scalable protocol that was developed by the Internet Engineering Task Force (IETF). BGP4 supports the CIDR addressing scheme, which increased the number of available IP addresses on the Internet. A path vector protocol, BGP was designed to supersede EGP, the original exterior gateway protocol. See autonomous system, CIDR and routing protocol.
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