Chapter 8
BGP4+ Configuration
Table of Contents
8.1 BGP4+ Overview
The Border Gateway Protocol (
) is a routing protocol applied between ASs to
exchange network reachability information between the ASs. The information covers a
list of ASs that a route passes through. It is sufficient for establishing a diagram indicating
the connection status of the ASs. This makes possible AS-based routing policies and at
the same time solves the route loop issue.
BGP4+ is an extension of BGP. It assumes the basic message format of BGP4 as defined
in RFC but has added with the extended attributes to transmit IPv6 routing information, and
processes all IPv6 routes according to RFC. BGP4+ also supports the extended functions
such as BGP route reflection and BGP alliance as defined in RFC. It has the following
features:
l
Supporting route aggregation
l
Employing TCP as the bottom-layer protocol and using TCP port 179 to guarantee a
reliable operation
l
Transmitting route updates only
l
Periodically sending the keep-alives signal to guarantee normal TCP connections
l
Possessing complete metrics
l
Boasting of abundant attributes and powerful control functions
l
Suiting huge networks
The operating principles of BGP4+ are similar to those of BGP.
8.2 Configuring BGP4+
This procedure describes how to configure the attributes and functions of BGP4+ protocol
routes, including basic functions and route load sharing.
Steps
1.
Configure BGP4+ basic function.
For the ZXR10 ZSR V2, the commands for configuring BGP4+ are similar to those
for configuring BGP in IPv4, except that the ZXR10 ZSR V2 supports IPv6 address
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