Chapter 1
Configuring BGP Routing
This chapter contains the following sections:
â– Overview on page 3
â– Platform Considerations on page 14
â– References on page 14
â– Features on page 16
â– Before You Configure BGP on page 17
â– Configuration Tasks on page 17
â– Basic Configuration on page 17
â– Configuring BGP Peer Groups on page 26
â– Advertising Routes on page 50
â– Configuring BGP Routing Policy on page 70
â– Selecting the Best Path on page 106
â– Interactions Between BGP and IGPs on page 133
â– Detecting Peer Reachability with BFD on page 141
â– Managing a Large-Scale AS on page 143
â– Configuring BGP Multicasting on page 153
â– Using BGP Routes for Other Protocols on page 156
â– Configuring BGP/MPLS VPNs on page 157
â– Testing BGP Policies on page 157
â– Monitoring BGP on page 158
Overview
The Border Gateway Protocol (BGP) provides loop-free interdomain routing between
autonomous systems (ASs). This section describes some of the main concepts of
BGP.
Conventions in This Chapter
Certain terms used with BGP, such as the names of attributes and messages, are
typically expressed in all uppercase letters in the RFCs. For improved readability,
Overview â– 3