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Highly scalable BGP-4 architecture
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Multicast
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Next-hop self
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Peer groups
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Route dampening (also referred to as route damping)
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Route mapping and attribute manipulation
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Route origins
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Route redistribution
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Route reflectors
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Soft-reconfiguration inbound
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Synchronization enabling and disabling
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Update source
Before You Configure BGP
Before you attempt to configure BGP, ensure that you have TCP/IP reachability to the
BGP peers with which you want your router to communicate. This may include tasks such
as setting up interfaces and creating routes.
See the JunosE Link Layer Configuration Guide and JunosE Physical Layer Configuration
Guide for information about how to configure appropriate interfaces. See JunosE IP
Services Configuration Guide, for information about setting up routing information.
Configuration Tasks
BGP is a very flexible protocol, often providing more than one way to achieve a routing
goal. The configuration tasks required therefore vary depending on your needs and
decisions. Read all of the following sections to determine the best method for configuring
BGP for your needs.
Basic Configuration
Two tasks are common to every BGP configuration: You must enable the BGP routing
process, and you must configure BGP neighbors. All other basic configuration tasks are
optional.
You can configure certain BGP attributes globally, for peer groups, or for individual peers.
The most specific level of configuration takes precedence. For example, if you configure
an attribute both globally and for a peer group, the peer group configuration takes
precedence for that peer group, but does not affect other peer groups. If you configure
an attribute both for a peer group and for a peer, the peer configuration takes precedence
for that peer, but does not affect other members of that peer group.
17Copyright © 2010, Juniper Networks, Inc.
Chapter 1: Configuring BGP Routing
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