Netgear XCM8806 - 8800 SERIES 6-SLOT CHASSIS SWITCH ユーザーズマニュアル

26.   

BGP

This chapter includes the following sections:

•     Overview 

•     BGP Features 

Overview

Border gateway protocol (BGP) is an exterior routing protocol that was developed for use in 
TCP/IP networks. The primary function of BGP is to allow different autonomous systems (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 Open Shortest Path First (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).

The following sections provide information on how the XCM8800 software supports BGP:

•     BGP Four-Byte AS Numbers 

•     BGP Attributes 

•     BGP Community Attributes 

•     Extended Community Attributes 

•     Multiprotocol BGP 

For more information on BGP, see the following documents:

RFC 1771—Border Gateway Protocol version 4 (BGP-4)

RFC 1965—Autonomous System Confederations for BGP

RFC 1966—BGP Route Reflection

RFC 1997—BGP Communities Attribute

RFC 1745—BGP/IDRP for IP—OSPF Interaction

RFC 2385—Protection of BGP Sessions via the TCP MD5 Signature Option