BGP Peering
An agreement between two networks to exchange routing information directly over BGP, usually at an IXP or via private cross-connect.
BGP peering is the relationship between two autonomous systems that exchange routes over BGP so traffic can flow between them. Peering can be settlement-free (both networks benefit equally and pay nothing) or paid (transit). Peering most often happens at an Internet Exchange Point (IXP), where dozens of networks meet on a shared fabric, or via a private cross-connect inside a data center. Healthy peering relationships reduce latency, cost, and dependence on upstream transit providers.