BGP is an autonomous system by autonomous system routing protocol, and next hop value of BGP network updates that leave an AS, is the IP address of the router at the exit point from AS.

EBGP multihop option often is used to peer with an external neighbor. If there are multiple paths between EBGP peers you will probably want to take advantage of that. Therefore you will need to use a loopback interface as update source.

BGP peer groups are used to simplify configuration and to improve performance. It can be used when a router has a group of neighbors with the same update policies. The update is generated once per group rather than for each neighbor.

For BGP, a neighbor relationship to be established, source IP address of BGP packets sent by a router must be the same as neighbor ip-address set on the neighboring router. By default, packet’s source IP address is outgoing interface.

Hi everybody! This is first lab from BGP series and here I would like to talk about basic bgp configuration. If you are new to bgp you need to know that each BGP router belong only to one Autonomous System (AS)