BGP配置实例
1,IBGP
R1
interface GigabitEthernet0/0/0
ip address 10.1.1.1 255.255.255.0
interface LoopBack0
ip address 1.1.1.1 255.255.255.0
# IBGP的底层是IGP,所以要配置IBGP前,要先配置要IGP(如这里的ospf)
ospf 1
area 0.0.0.0
network 1.1.1.0 0.0.0.255
network 10.1.1.0 0.0.0.255
router id 1.1.1.1
bgp 100
peer 2.2.2.2 as-number 100
peer 2.2.2.2 connect-interface LoopBack0 指定源为环回口(IBGP指定源地址一般为换回口, ebgp指定源地址一般为直连接口)
peer 2.2.2.2 password cipher gu MD5密码
network 1.1.1.0 255.255.255.0
R2
interface GigabitEthernet0/0/0
ip address 10.1.1.2 255.255.255.0
interface LoopBack0
ip address 2.2.2.2 255.255.255.0
#
ospf 1
area 0.0.0.0
network 2.2.2.0 0.0.0.255
network 10.1.1.0 0.0.0.255 注意这里R2对R3不能宣告ospf,因为他们是EBGP
router id 2.2.2.2
bgp 100
peer 1.1.1.1 as-number 100
peer 1.1.1.1 connect-interface LoopBack0
peer 1.1.1.1 password cipher gu
network 2.2.2.0 255.255.255.0
2.EBGP
R2
pee 10.1.2.2 as-number 200
R3
interface LoopBack0
ip address 3.3.3.3 255.255.255.0
router id 3.3.3.3
bgp 200
peer 10.1.2.1 as-number 100
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