H3C S7500E Series Ethernet Switches Operation Manual

Operation Manual – IPv4 Routing
H3C S7500E Series Ethernet Switches Chapter 5 BGP Configuration
5-1
Chapter 5 BGP Configuration
The Border Gateway Protocol (BGP) is a dynamic inter-AS route discovery protocol.
When configuring BGP, go to these sections for information you are interested in:
z BGP Overview
z BGP Configuration Task List
z Configuring BGP Basic Functions
z Controlling Route Distribution and Reception
z Configuring BGP Route Attributes
z Tuning and Optimizing BGP Networks
z Configuring a Large Scale BGP Network
z Displaying and Maintaining BGP
z BGP Configuration Examples
z Troubleshooting BGP
 Note:
The term “router” refers to a router in a generic sense or a Layer 3 switch running
routing protocols.
5.1 BGP Overview
Three early versions of BGP are BGP-1 (RFC1105), BGP-2 (RFC1163) and BGP-3
(RFC1267). The current version in use is BGP-4 (RFC1771). BGP-4 is rapidly
becoming the defacto Internet exterior routing protocol standard and is commonly used
between ISPs.
 Note:
BGP refers to BGP-4 in this document.
The characteristics of BGP are as follows:
z Focusing on the control of route propagation and the selection of optimal routes
rather than the discovery and calculation of routes, which makes BGP, an exterior
routing protocol different from interior routing protocols such as OSPF and RIP
z Using TCP as its transport layer protocol to enhance reliability