A gateway protocol known as Border Gateway Protocol (BGP) makes it possible for the internet to transmit routing data between autonomous computers (AS). Networks require a method of communication as they interact with one another. Private peering allows for the accomplishment of this. Peering is made feasible through BGP. Without it, networks could not communicate with one another to send and receive data.

Border Gateway Protocol: What is it?

BGP is commonly referred to as the Web's postal service and its glue. BGP has been compared to GPS software for mobile devices. Like how GPS provides you all the required road information, BGP has a constantly updated map of the internet from which routers select the most advantageous route at any given moment.

Why is BGP used?

In the event that one internet path goes down, BGP offers network stability so that routers may swiftly react to transmit packets over a different channel. BGP bases its routing choices on the pathways, regulations, or network policies set by a network administrator. Each BGP router keeps a common routing table that is used to reroute packets while they are in transit. In order to exchange routing data, BGP employs a client-server topology. The client-server pair starts a BGP session by making a request to the server.

How does BGP work?

Each router maintains a routing table that controls how packets are directed. Based on data in the BGP routing information base (RIB), a data table kept on a server on the BGP route server , and information received from other routers, the BGP process on the router generates the routing table information. The RIB continuously updates the routing table as changes take place using information from both directly connected external peers and internal peers. This is done in accordance with standards for what routes should be used and what information should be released.

A peer may establish E-BGP over other peers with the help of DE-CIX India.

Features of the border gateway protocol

Configuration of Inter-Autonomous Systems: The primary function of BGP is to facilitate communication between two autonomous systems.

BGP supports the Next-Hop Paradigm.

Path Information: In addition to the reachable destination and the following destination pair, BGP advertisements also contain path information.
Support for Policies: The administrator can configure policies for BGP to implement. A router running BGP, for instance, can be set up to discriminate between routes known from within the AS and those known from outside the AS.

Runs Over TCP.
BGP conserve network Bandwidth.
BGP supports CIDR.
BGP also supports Security.