Module 8 BGP - absentee-neptune/NET-330 GitHub Wiki

BGP in Packet Tracer

  • Means Border Gateway Protocol
  • Exchanges routing and reachability information among autonomous systems (AS) on the Internet
  • Makes routing decisions based on paths, network policies, or rule-sets

AS Numbers

  • A unique ASN is allocated to each AS for use in BGP routing
  • AS numbers are important because the ASN uniquely identifies each (aggregated) network on the Internet

Steps to Enable BGP

  • Define router instance
    • >enable
    • #conf t
    • #(config)router bgp AS_number_of_router
  • Identify peers
    • #(config-router)neighbor ip_of_peer remote-as AS-number_of_peer
  • Advertise Networks
    • #(config-router)network netowrk_address mask netmask

BGP and OSPF

  • When using BGP to distribute OSPF routes, use the following command in BGP configuration:
    • #(config-router)redistribute ospf instance_number