实验要求：
完成基本IP、IGP配置，建立BGP连接。
实验环境：
实验配置：
端口配置：
IOU1:
config terminal
interface e0/0
ip address 10.1.12.1 255.255.255.0
no shutdown
interface loop 0
ip address 1.1.1.1 255.255.255.255
no shutdown
interface loop 1
ip address 2.2.2.2 255.255.255.255
no shutdown
exit
IOU2:
config terminal
interface e0/0
ip address 10.1.23.1 255.255.255.0
no shutdown
interface loop 0
ip address 1.1.1.1 255.255.255.255
no shutdown
interface loop 1
ip address 2.2.2.2 255.255.255.255
no shutdown
exit
IOU3:
config terminal
interface e0/0
ip address 10.1.12.2 255.255.255.0
no shutdown
interface e0/1
ip address 10.1.34.1 255.255.255.0
no shutdown
interface loop 0
ip address 3.3.3.3 255.255.255.255
no shutdown
exit
IOU4:
config terminal
interface e0/0
ip address 10.1.34.2 255.255.255.0
no shutdown
interface e0/1
ip address 10.1.45.1 255.255.255.0
no shutdown
interface loop 0
ip address 4.4.4.4 255.255.255.255
no shutdown
exit
IOU5:
config terminal
interface e0/0
ip address 10.1.23.2 255.255.255.0
no shutdown
interface e0/1
ip address 10.1.45.2 255.255.255.0
no shutdown
interface loop 0
ip address 5.5.5.5 255.255.255.255
no shutdown
exit
BGP配置：
IOU1:
router bgp 100
bgp router-id 1.1.1.1
neighbor 10.1.12.2 remote-as 345
network 1.1.1.1 mask 255.255.255.255
network 2.2.2.2 mask 255.255.255.255
network 10.1.12.0 mask 255.255.255.0
exit
IOU2:
router bgp 200
bgp router-id 2.2.2.2
neighbor 10.1.23.2 remote-as 345
network 1.1.1.1 mask 255.255.255.255
network 2.2.2.2 mask 255.255.255.255
network 10.1.23.0 mask 255.255.255.0
exit
IOU3:
router bgp 345
bgp router-id 3.3.3.3
neighbor 10.1.12.1 remote-as 100
neighbor 4.4.4.4 remote-as 345
neighbor 4.4.4.4 update-source loopback 0
neighbor 5.5.5.5 remote-as 345
neighbor 5.5.5.5 update-source loopback 0
network 10.1.13.0 mask 255.255.255.0
network 10.1.34.0 mask 255.255.255.0
network 3.3.3.3 mask 255.255.255.255
exit
router ospf 1
network 10.1.13.0 0.0.0.255 area 0
network 10.1.34.0 0.0.0.255 area 0
network 3.3.3.3 0.0.0.0 area 0
exit
IOU4:
router bgp 345
bgp router-id 4.4.4.4
neighbor 3.3.3.3 remote-as 345
neighbor 3.3.3.3 update-source loopback 0
neighbor 5.5.5.5 remote-as 345
neighbor 5.5.5.5 update-source loopback 0
network 10.1.34.0 mask 255.255.255.0
network 10.1.45.0 mask 255.255.255.0
network 4.4.4.4 mask 255.255.255.255
exit
router ospf 1
network 10.1.34.0 0.0.0.255 area 0
network 10.1.45.0 0.0.0.255 area 0
network 4.4.4.4 0.0.0.0 area 0
exit
IOU5:
router bgp 345
bgp router-id 5.5.5.5
neighbor 3.3.3.3 remote-as 345
neighbor 3.3.3.3 update-source loopback 0
neighbor 4.4.4.4 remote-as 345
neighbor 4.4.4.4 update-source loopback 0
neighbor 10.1.23.1 remote-as 200
network 10.1.45.0 mask 255.255.255.0
network 10.1.23.0 mask 255.255.255.0
network 5.5.5.5 mask 255.255.255.255
exit
router ospf 1
network 10.1.45.0 0.0.0.255 area 0
network 10.1.23.0 0.0.0.255 area 0
network 5.5.5.5 0.0.0.0 area 0
exit
查看bgp
实验结束，如有疏漏，还请读者指出。
