Border Gateway Protocol (BGP)
Border Gateway Protocol (BGP) exchanges routing information among neighboring routers in different Autonomous Systems (AS). Arista switches use BGP version 4+, incorporating the multiprotocol extensions defined by RFC 4760 so that BGP can carry both IPv4 and IPv6 routes simultaneously over a single BGP peering.
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