System information

Configuring BGP
12-69
Redistributing Routes into BGP
Each routing protocol uses different metrics to transfer routes. Some protocols use
hop count metrics, while others use bandwidth and delay attributes to define metrics.
When a specific route is redistributed from one routing protocol or domain into
another, a common metric must be applied by the receiving protocol. Routes are
redistributed to advertise networks on another routing protocol. Figure 12-22 shows
Router New York redistributes the routes learned through OSPF protocol from
Routers Boston and Los Angeles into BGP.
Figure 12-22 Redistributing Routes Learned from OSPF
Follow these steps to redistribute routes into BGP:
1. Enter the BGP routing process in which the routes are to be redistributed, as
shown below:
MOT(config)#router bgp <n>
where:
n is the Autonomous System (AS) number.
AS 100
AS 200
SF
LA
Boston
OSPF
OSPF
EBGP
OSPF
NY
180.40.20.1
180.40.20.2