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BGP and BGP4+ Introduction
Software Reference Supplement for SwitchBlade® x8112, x908, x900 and x610 Series Switches
1.12 AlliedWare Plus
TM
Operating System - Software Version 5.4.3-2.6 C613-50032-01 REV D
How to configure BGP and BGP4+
This section describes BGP and BGP4+ configuration tasks and the commands required.
For example configurations with sample topologies, see Chapter 2, BGP and BGP4+
Configuration.
Initial BGP and BGP4+ Configuration Tasks
There are two initial BGP and BGP4+ configuration tasks described in the below sections.
More advanced BGP and BGP4+ configuration tasks are described later in this chapter and
are also available separately in the How to Configure BGP and BGP4+ Technical Guide:
■ How to enable BGP and BGP4+ Routing
■ How to configure BGP and BGP4+ Neighbors
How to enable BGP and BGP4+ Routing
To enable BGP or BGP4+ routing and establish a BGP or BGP4+ routing process, use the
following commands starting in Global Configuration mode:
How to configure BGP and BGP4+ Neighbors
Like other EGPs, BGP must completely understand the relationships it has with its
neighbors. Therefore, this task is required.
BGP supports two kinds of neighbors: internal and external. Internal neighbors are in the
same autonomous system; external neighbors are in different autonomous systems.
Normally, external neighbors are adjacent to each other and share a subnet, while internal
neighbors may be anywhere in the same autonomous system.
To configure BGP neighbors, use the following command in Router Configuration mode:
awplus(config)#
router bgp <asn>
This command enables a BGP or BGP4+ routing process, which
places the router in Router Configuration mode.
awplus(config-router)#
network {<ip-prefix/length>|
<ip-network-addr>} [mask
<network-mask>] [route-map
<route-map-name>] [backdoor]
This command flags an IPv4 network as local to this
autonomous system and enters it to the BGP table.
awplus(config-router)#
network {<ipv6-prefix/length>|
<ipv6-network-addr>} [route-map
<route-map-name>]
This command flags an IPv6 network as local to this
autonomous system and enters it to the BGP4+ table.
awplus(config-router)#
neighbor <neighborid> remote-as
<as-number>
This command specifies a BGP neighbor.