What is the standard port for BGP?

Border Gateway Protocol (BGP) operates using TCP as its transport protocol, and the standard port assigned for BGP is port 179. This port is designated specifically for BGP sessions to establish and maintain communication between BGP routers. The choice of port 179 is integral to enabling reliable and consistent routing information exchanges across the internet.

The selection of TCP as the transport layer protocol ensures that BGP can provide reliable delivery of routing updates and maintain the integrity of the routing table. As a result, all BGP communication, including the establishment of peering sessions and the exchange of routing information, takes place over port 179.