BGP

Frage	Antworten
Autonomous System	A group of networks and routers controlled by a single administrative authority
Autonomous System Concept	Each collection of networks and routers managed by one administrative authority is considered to be a single autonomous system that is free to choose an internal routing architecture and protocols.
Practical Limit on Group Size	It is safe to allow up to a dozen routers to participate in a single routing information protocol across a wide area network; Approximately five times as many can safely participate across a set of local area networks.
Exterior Gateway Protocol (EGP)	Any protocol designed to exchange routing and reachability information among autonomous systems on the Internet
EGP solves two problems:	Allows router outside a group to advertise networks hidden in another autonomous system Allows router outside a group to learn destinations in the group
Border Gateway Protocol (BGP)	Basically the only EGP still in existence Each AS designates a border router to speak on its behalf Two border routers become BGP peers
Key characteristics of BGP	Provides inter-autonomous system communication Propagates reachability information Follows next-hop paradigm Provides support for policies Sends path information Permits incremental updates Allows route aggregation Allows authentication
Key restriction on an EGP	An exterior gateway protocol does not communicate or interpret distance metrics, even if metrics are available.

Zusammenfassung der Ressource

	Erstellt von M KB vor etwa 6 Jahre