Chapter 16 BGP Configuration
Confidential and Proprietary Information of ZTE CORPORATION 243
FIGURE 100 MED-ATTRIBUTE
AS100
AS300
AS400
2.2.2.1/30
180.10.0.0/24
R3 R4
2.2.2.2/30
R1
R2
1.1.1.1/30 1.1.1.2/30
4.4.4.1/304.4.4.2/30
3.3.3.1/30
3.3.3.2/30
170.10.0.0/24
med 120
med 50
med 200
In the following, the route-map command is used to configure
the MED value.
Configuration of R1:
ZXR10_R1(config)#router bgp 100
ZXR10_R1(config-router)#neighbor 2.2.2.1 remote-as 300
ZXR10_R1(config-router)#neighbor 3.3.3.2 remote-as 300
ZXR10_R1(config-router)#neighbor 4.4.4.1 remote-as 400
....
Configuration of R3:
ZXR10_R3(config)#router bgp 300
ZXR10_R3(config-router)#neighbor 2.2.2.2 remote-as 100
ZXR10_R3(config-router)#neighbor 2.2.2.2 route-map setmetricout
out
ZXR10_R3(config-router)#neighbor 1.1.1.2 remote-as 300
ZXR10_R3(config)#route-map setmetricout permit 10
ZXR10_R3(config-route-map)#set metric 120
Configuration of R4:
ZXR10_R4(config)#router bgp 300
ZXR10_R4(config-router)#neighbor 3.3.3.1 remote-as 100
ZXR10_R4(config-router)#neighbor 3.3.3.1 route-map setmetricout
out
ZXR10_R4(config-router)#neighbor 1.1.1.1 remote-as 300
ZXR10_R4(config)#route-map setmetricout permit 10
ZXR10_R4(config-route-map)#set metric 200
Configuration of R2:
ZXR10_R2(config)#router bgp 400
ZXR10_R2(config-router)#neighbor 4.4.4.2 remote-as 100