Border Gateway Protocol (BGP) Configuration

The Border Gateway Protocol (BGP) is the routing protocol of the Internet, used to route traffic across the Internet. For that reason, it's a pretty important protocol, and it can also be the hardest one to understand.

From our overview of Internet routing, you should realize that routing in the Internet is comprised of two parts: the internal fine-grained portions managed by an IGP such as OSPF, and the interconnections of those autonomous systems (AS) via BGP.

Who needs to understand BGP?
BGP is relevant to network administrators of large organizations which connect to two or more ISPs, as well as to Internet Service Providers (ISPs) who connect to other network providers. If you are the administrator of a small corporate network, or an end user, then you probably don't need to know about BGP.