BGP Overview

BGP is an exterior routing protocol that was developed for use in TCP/IP networks. The primary function of BGP is to allow different ASs to exchange network reachability information.

An AS is a set of routers that are under a single technical administration. This set of routers uses a different routing protocol, for example OSPF, for intra-AS routing. One or more routers in the AS are configured to be border routers, exchanging information with other border routers (in different ASs) on behalf of all of the intra-routers.

BGP can be used as an exterior border gateway protocol (referred to as EBGP), or it can be used within an AS as an interior border gateway protocol (referred to as IBGP).

For more information on BGP, refer to the following documents:


ExtremeXOS supports BGP version 4 only, and does not support connections to peers running older versions of BGP.

For complete information about software licensing, including how to obtain and upgrade your license and what licenses are appropriate for these features, see the Switch Engine 32.2 Feature License Requirements document..