BGP反射（RR）
R1
配置：
r1#show running-config
Building configuration...
Current configuration : 1152 bytes
!
version 12.3
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname r1
!
boot-start-marker
boot-end-marker
!
!
memory-size iomem 5
no aaa new-model
ip subnet-zero
!
!
no ip domain lookup
!
!
ip cef
ip ips po max-events 100
no ftp-server write-enable
!
interface Loopback1
ip address 1.1.1 .1 255.255.255.0
!
interface Serial0/0
ip address 192.168.1.1 255.255.255.0
serial restart-delay 0
!
interface Serial0/1
no ip address
shutdown
serial restart-delay 0
!
interface Serial0/2
no ip address
shutdown
serial restart-delay 0
!
interface Serial0/3
no ip address
shutdown
serial restart-delay 0
!
router eigrp 1
network 1.1.1 .0 0.0.0.255
network 192.168.1.0
no auto-summary
!
router bgp 100
no synchronization
bgp router-id 1.1.1 .1
bgp log-neighbor-changes
network 1.1.1 .0 mask 255.255.255.0
neighbor 2.2.2 .2 remote-as 100
neighbor 2.2.2 .2 update-source Loopback1
no auto-summary
!
ip http server
no ip http secure-server
ip classless
!
control-plane
!
line con 0
line aux 0
line vty 0 4
login
!
End
R2
配置：
r2#show running-config
Building configuration...
Current configuration : 1301 bytes
!
version 12.3
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname r2
!
boot-start-marker
boot-end-marker
!
!
memory-size iomem 5
no aaa new-model
ip subnet-zero
!
!
no ip domain lookup
!
!
ip cef
ip ips po max-events 100
no ftp-server write-enable
!
interface Loopback2
ip address 2.2.2 .2 255.255.255.0
!
interface Serial0/0
ip address 192.168.1.2 255.255.255.0
serial restart-delay 0
!
interface Serial0/1
ip address 192.168.2.1 255.255.255.0
serial restart-delay 0
!
interface Serial0/2
no ip address
shutdown
serial restart-delay 0
!
interface Serial0/3
no ip address
shutdown
serial restart-delay 0
!
router eigrp 1
network 2.2.2 .0 0.0.0.255
network 192.168.1.0
network 192.168.2.0
no auto-summary
!
router bgp 100
no synchronization
bgp router-id 2.2.2 .2
bgp log-neighbor-changes
network 2.2.2 .0 mask 255.255.255.0
neighbor 1.1.1 .1 remote-as 100
neighbor 1.1.1 .1 update-source Loopback2
neighbor 3.3.3 .3 remote-as 100
neighbor 3.3.3 .3 update-source Loopback2
neighbor 3.3.3 .3 route-reflector-client
no auto-summary
!
ip http server
no ip http secure-server
ip classless
!
control-plane
!
line con 0
line aux 0
line vty 0 4
login
!
!
End
R3
配置：
r3#show running-config
Building configuration...
Current configuration : 1233 bytes
!
version 12.3
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname r3
!
boot-start-marker
boot-end-marker
!
!
memory-size iomem 5
no aaa new-model
ip subnet-zero
!
!
no ip domain lookup
!
ip cef
ip ips po max-events 100
no ftp-server write-enable
!
interface Loopback3
ip address 3.3.3 .3 255.255.255.0
!
interface Serial0/0
no ip address
shutdown
serial restart-delay 0
!
interface Serial0/1
ip address 192.168.2.2 255.255.255.0
serial restart-delay 0
!
interface Serial0/2
ip address 192.168.3.1 255.255.255.0
serial restart-delay 0
!
interface Serial0/3
no ip address
shutdown
serial restart-delay 0
!
router eigrp 1
network 3.3.3 .0 0.0.0.255
network 192.168.2.0
no auto-summary
!
router bgp 100
no synchronization
bgp router-id 3.3.3 .3
bgp log-neighbor-changes
network 3.3.3 .0 mask 255.255.255.0
neighbor 2.2.2 .2 remote-as 100
neighbor 2.2.2 .2 update-source Loopback3
neighbor 2.2.2 .2 next-hop-self
neighbor 192.168.3.2 remote-as 200
no auto-summary
!
ip http server
no ip http secure-server
ip classless
!
control-plane
!
line con 0
line aux 0
line vty 0 4
login
!
!
End
R4
配置：
r4# show running-config
Building configuration...
Current configuration : 1032 bytes
!
version 12.3
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname r4
!
boot-start-marker
boot-end-marker
!
memory-size iomem 5
no aaa new-model
ip subnet-zero
!
no ip domain lookup
!
!
ip cef
ip ips po max-events 100
no ftp-server write-enable
!
interface Loopback4
ip address 4.4.4 .4 255.255.255.0
!
interface Serial0/0
no ip address
shutdown
serial restart-delay 0
!
interface Serial0/1
no ip address
shutdown
serial restart-delay 0
!
interface Serial0/2
ip address 192.168.3.2 255.255.255.0
serial restart-delay 0
!
interface Serial0/3
no ip address
shutdown
serial restart-delay 0
!
router bgp 200
no synchronization
bgp router-id 4.4.4 .4
bgp log-neighbor-changes
network 4.4.4 .0 mask 255.255.255.0
neighbor 192.168.3.1 remote-as 100
no auto-summary
!
ip http server
no ip http secure-server
ip classless
!
control-plane
!
line con 0
line aux 0
line vty 0 4
login
!
!
End
结论：
①
RR
会从
EBGP
学习的路由反射给簇内的客户端和非客户端
②
RR
会从客户端收到的路由反射到客户端、非客户端、
EBGP
邻居
③
RR
从非客户端收到的路由会反射给客户端和
EBGP