User Manual

BGP Configuration Examples

226 Enterasys X-Pedition User Reference Manual

Figure 18 shows a sample BGP configuration where the MED attribute has been used.

Figure 18. Sample BGP Configuration (MED Attribute)

Routers X-Pedition4 and X-Pedition6 inform router C1 about network 172.16.200.0/24 through

External BGP (EBGP). Router X-Pedition6 announced the route with a MED of 10, whereas router

X-Pedition4 announces the route with a MED of 20. Of the two EBGP routes, router C1 chooses

the one with a smaller MED. Thus router C1 prefers the route from router X-Pedition6, which has a

MED of 10.

Router X-Pedition4 has the following CLI configuration:

Router X-Pedition6 has the following CLI configuration:

bgp create peer-group pg752to751 type external autonomous-system 64751

bgp add peer-host 10.200.12.15 group pg752to751

# Set the MED to be announced to peer group pg752to751

bgp set peer-group pg752to751 metric-out 20

bgp set peer-group pg752to751 med

bgp create peer-group pg752to751 type external autonomous-system 64751

bgp add peer-host 10.200.12.15 group pg752to751

bgp set peer-group pg752to751 metric-out 10

bgp set peer-group pg752to751 med

Physical Link

Legend:

Peering Relationship

Information Flow

AS 64752

10.200.12.15/24

10.200.12.4/24

10.200.12.0/24

10.200.12.6/24

AS 64751

172.16.200.4/24

172.16.200.6/24

X-Ped

X-Pe