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Configuring BGP
BGP Configuration Examples
IPC-336
Cisco IOS IP Configuration Guide
neighbor 1.1.1.3 remote-as 300
neighbor 1.1.1.3 route-map set-peer-address out
route-map set-peer-address permit 10
set ip next-hop peer-address
Router C Configuration
router bgp 300
neighbor 1.1.1.2 remote-as 200
BGP Neighbor Configuration Examples
The following example shows how BGP neighbors on an autonomous system are configured to share
information. In the example, a BGP router is assigned to autonomous system 109, and two networks are
listed as originating in the autonomous system. Then the addresses of three remote routers (and their
autonomous systems) are listed. The router being configured will share information about networks
131.108.0.0 and 192.31.7.0 with the neighbor routers. The first router listed is in a different autonomous
system; the second neighbor remote-as router configuration command specifies an internal neighbor
(with the same autonomous system number) at address 131.108.234.2; and the third neighbor remote-as
router configuration command specifies a neighbor on a different autonomous system.
router bgp 109
network 131.108.0.0
network 192.31.7.0
neighbor 131.108.200.1 remote-as 167
neighbor 131.108.234.2 remote-as 109
neighbor 150.136.64.19 remote-as 99
In Figure 58, Router A is being configured. The iBGP neighbor is not directly linked to Router A.
External neighbors (in autonomous system 167 and autonomous system 99) must be linked directly to
Router A.