ibgp next-hop-self
R1:
interface Loopback0
ip address 1.1.1.1 255.255.255.0
no ip directed-broadcast
!
interface Serial0/0
ip address 12.0.0.1 255.255.255.0
no ip directed-broadcast
!
interface Serial0/1
ip address 14.0.0.1 255.255.255.0
no ip directed-broadcast
!
interface Serial0/2
no ip address
no ip directed-broadcast
shutdown
clockrate 2015232
!
interface Serial0/3
no ip address
no ip directed-broadcast
shutdown
clockrate 2015232
!
router bgp 1
no synchronization
bgp router-id 1.1.1.1
network 1.1.1.0 mask 255.255.255.0
network 12.0.0.0 mask 255.255.255.0
neighbor 12.0.0.2 remote-as 1
neighbor 12.0.0.2 update-source Serial0/0
neighbor 12.0.0.2 next-hop-self
neighbor 14.0.0.4 remote-as 2
no auto-summary
R2:
interface Loopback0
ip address 2.2.2.2 255.255.255.0
no ip directed-broadcast
!
interface Serial0/0
ip address 12.0.0.2 255.255.255.0
no ip directed-broadcast
!
interface Serial0/1
ip address 23.0.0.2 255.255.255.0
no ip directed-broadcast
!
interface Serial0/2
no ip address
no ip directed-broadcast
shutdown
clockrate 2015232
!
interface Serial0/3
no ip address
no ip directed-broadcast
shutdown
clockrate 2015232
!
router bgp 1
no synchronization
bgp router-id 2.2.2.2
neighbor 12.0.0.1 remote-as 1
neighbor 12.0.0.1 route-reflector-client
neighbor 23.0.0.3 remote-as 1
neighbor 23.0.0.3 update-source Serial0/1
neighbor 23.0.0.3 route-reflector-client
no auto-summary
R3:
interface Loopback0
ip address 3.3.3.3 255.255.255.0
no ip directed-broadcast
!
interface Serial0/0
ip address 23.0.0.3 255.255.255.0
no ip directed-broadcast
!
interface Serial0/1
no ip address
no ip directed-broadcast
shutdown
clockrate 2015232
!
interface Serial0/2
no ip address
no ip directed-broadcast
shutdown
clockrate 2015232
!
interface Serial0/3
no ip address
no ip directed-broadcast
shutdown
clockrate 2015232
!
router bgp 1
no synchronization
bgp router-id 3.3.3.3
neighbor 23.0.0.2 remote-as 1
neighbor 23.0.0.2 update-source Serial0/0
no auto-summary
R4:
interface Loopback0
ip address 4.4.4.4 255.255.255.0
no ip directed-broadcast
!
interface Serial0/0
ip address 14.0.0.4 255.255.255.0
no ip directed-broadcast
!
interface Serial0/1
no ip address
no ip directed-broadcast
shutdown
clockrate 2015232
!
interface Serial0/2
no ip address
no ip directed-broadcast
shutdown
clockrate 2015232
!
interface Serial0/3
no ip address
no ip directed-broadcast
shutdown
clockrate 2015232
!
router bgp 2
bgp router-id 4.4.4.4
network 4.4.4.0 mask 255.255.255.0
neighbor 14.0.0.1 remote-as 1
no auto-summary
结果发现R3上SHOW IP BGP 的条目的下一跳为12.0.0.1 不优，看来R2对r3的next-hop-self 无效；只能在R3上做静态路由 IP route 12.0.0.0 255.255.255.0 inter S0/0
还是有点混乱；需要继续；
晕，忘记全互联