5.2.5 - Border Gateway Protocol

Flashcards about Border Gateway Protocol (BGP) based on CertMaster Perform Network+ 9.0 notes.

Border Gateway Protocol (BGP)

A routing protocol designed for use between routing domains in a mesh internetwork, primarily between ISPs.

EIGRP and OSPF

Used for communications between routers within a single routing domain, referred to as an autonomous system (AS).

BGP

Primarily used for routing between autonomous systems.

Autonomous System (AS)

Designed to hide the complexity of private networks from the public Internet.

AS Path Exchange

Edge routers for each AS exchange only as much network-reachability information as is required to access other autonomous systems (the AS path).

BGP Priority

Prioritizes stability and can be slow to converge.

Autonomous System Numbers (ASN)

Allocated to ISPs by IANA via the various regional registries.

Network Layer Reachability Information (NLRI)

Classless network prefixes used by BGP.

Path Selection Metrics for BGP

Hop count, weight, local preference, origin, and community.

BGP Port

TCP on port 179.