BGP = Border Gateway Protocol
BGP is a dynamic routing protocol that will aid with redundancy, failover, and load sharing.
As with EIGRP there are neighbors.
You can control your route announcements incoming and outgoing.
You can have multiple peering sessions, but only one BGP process defined by an AS.
Some possible uses would be multiple carriers terminating ckt's into one device. This is referred to as multihomed.
You can use this for multiple ckts from the same carrier. You can have routemaps used for different reasons based on your traffic patterns needed. BGP can be in two flavors, iBGP and eBGP. iBGP is internal, same AS applied to both sessions and eBGP is external different AS applied for sessions.
BGP is typically a core routing and these routes are then redistributed into EIGRP, which is more LAN routing.
