* IBGP is a router-to-router protocol that is utilized within a single autonomous system. The EBGP protocol is used by routers in different autonomous systems to communicate with one another.
* IBGP routers must be synchronized before being sent to the IP routing database. (Unless you disable synchronization).
* The IP address of the interface used to connect with the EBGP peer is set as the next-hop attribute by EBGP. If a prefix was learned via an EBGP neighbor, the next-hop attribute is not changed when an IBGP router advertises it to an IBGP peer.
* All prefixes learned from an EBGP neighbor are advertised to all other EBGP neighbors through EBGP. Prefixes learned from one IBGP neighbor are not advertised to another IBGP neighbor by IBGP routers.
