Other deployment topologies are also possible, such as running eBGP peering inside a VPN tunnel, allowing two remote sites to exchange routing information in a secure and isolated manner.

Routers on the boundary of one AS exchanging information with another AS are called border or edge routers or simply eBGP peers and are typically connected directly, while iBGP peers can be interconnected through other intermediate routers. When it runs between different autonomous systems, it is called External BGP (eBGP or Exterior Border Gateway Protocol). When BGP runs between two peers in the same autonomous system (AS), it is referred to as Internal BGP (iBGP or Interior Border Gateway Protocol). Among routing protocols, BGP is unique in using TCP as its transport protocol. A BGP speaker sends 19-byte keep-alive messages every 60 seconds to maintain the connection. In contrast, the Internet application of the protocol may be referred to as Exterior Border Gateway Protocol, External BGP, or eBGP.īGP neighbors, called peers, are established by manual configuration between routers to create a TCP session on port 179. In this application it is referred to as Interior Border Gateway Protocol, Internal BGP, or iBGP. 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 core routing decisions.īGP may be used for routing within an autonomous system. The protocol is classified as a path vector protocol. Are you ready to pass your CCNP exam?įor lots more content, visit – learn about GNS3, CCNA, Packet Tracer, Python, Ansible and much, much more.īorder Gateway Protocol (BGP) is a standardized exterior gateway protocol designed to exchange routing and reachability information among autonomous systems (AS) on the Internet. He has also personally developed Cisco engineer utilities such as the VPN Config Generator, software, training materials, EBooks, videos and other products which are used throughout the world.This is one of multiple Cisco CCNP GNS3 Labs.

These include multiple SDN courses and HP ASE certification courses (4 day Instructor led training).ĭavid's YouTube videos have been viewed +2 million times.ĭavid has been training Cisco and networking courses for 15+ years and has delivered instructor led courses in various countries around the world covering a wide range of Cisco topics from CCNA to CCIE. Many thousands of engineers like you use his tools and training on a regular basis.ĭavid has developed over 20 courses for HP which are used worldwide.

David has the highest rated and most popular course in the GNS3 Academy: SDN and OpenFlow Introduction.ĭavid's software tools and training have been downloaded +100,000 times. David Bombal (CCIE #11023 Emeritus) passed his Cisco Certified Internetwork Expert Routing and Switching exam in January 2003.

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