Border Gateway Protocol (BGP)
Border Gateway Protocol (BGP) is an exterior gateway protocol (EGP) that exchanges routing information among neighboring routers in different Autonomous Systems (AS). BGP version 4 is defined by RFC 4271.
Multiprotocol BGP (BGP4+) can carry routes from multiple address families (AFI) and sub-address families (SAFI) simultaneously over a single BGP peering. Multiprotocol BGP is defined by RFC 4760.
This chapter contains the following sections.
Arista switches support these BGP functions:
• A single BGP instance
• Simultaneous internal (IBGP) and external (EBGP) peering
• Multiprotocol BGP
• BGP Confederations