Border Gateway Protocol (BGP) is a standardized exterior gateway protocol designed to exchange routing and reachability information among autonomous systems (AS) on the Internet. The protocol is classified as a path vector protocol. The Border Gateway Protocol makes routing decisions based on paths, network policies, or rule-sets configured by a network administrator and is involved in making.
- BGP is defined by IETF in RFC 4271 and we are currently on version 4 (BGP4 or BGP-4) since 2006. BGP is a Layer 4 Protocol where peers have to be manually configured to form a TCP connection and begin speaking BGP to exchange routing information. How BGP Works Autonomous Systems.
- Example of updating a routing table Receive: a response RIP message 1. Add one to the hop count for each advertised destination 2. Repeat for each advertised destination If ( destination is not in my routing table) Add the destination to my table Else If ( next-hop field is the same) Replace existing entry with the new advertised one.
- “Border Gateway Protocol (BGP) is a standardized exterior gateway protocol designed to exchange routing and reachability information between autonomous systems (AS) on the Internet. The protocol is often classified as a path vector protocol but is sometimes also classed as a distance-vector routing protocol.”.
Course Description
BGP (Border Gateway Protocol) is the routing protocol of the Internet, used to route traffic from one autonomous system (AS) to another. It’s an important topic to understand if you work at an ISP or at a large company that is connected to two or more ISPs. Unlike IGPs like OSPF or EIGRP, BGP uses a set of attributes to determine the best path for each destination. There are a lot of options you can use to manipulate traffic patterns.
Bgp Routing Protocol Notes
Course Highlights
In this course you will learn:
- What BGP is.
- The difference between internal and external BGP.
- How to read the BGP table.
- How BGP uses different attributes instead of a metric to make routing decisions.
- What BGP communities are.
- How to filter BGP networks.
- Advanced topics like BGP peer groups, route reflectors and confederations.
- And many other topics…
Presented to you by instructor Rene Molenaar, CCIE #41726
Bgp Routing Protocol Border Gateway
Requirements
- CCNA R&S equivalent knowledge of how routers and routing protocols operate.
- Good understanding of IGPs like RIP, OSPF and EIGRP.