CCNP精粹系列之三十一--BGP源地址问题二，推荐

源地址
-------不同自治系统间
试验环境：



试验环境：
R1:lo0 192.168.10.1 255.255.255.0
lo1 172.16.10.1 255.255.0.0

S1/0 202.110.100.1 255.255.255.0
S1/1 202.110.101.1 255.255.255.0

R2:
lo0 172.16.20.1 255.255.0.0
S1/0 202.110.100.2 255.255.255.0
S1/1 202.110.101.2 255.255.255.0

R1上：

Router(config)#host R1
R1(config)#int lo0
R1(config-if)#ip addr 192.168.10.1 255.255.255.0
R1(config-if)#no shut
R1(config-if)#int lo1
R1(config-if)#ip addr 172.16.10.1 255.255.0.0
R1(config-if)#int s1/0
R1(config-if)#ip addr 202.110.100.1 255.255.255.0
R1(config-if)#encap hdlc
R1(config-if)#clock rate 56000
R1(config-if)#no shut
R1(config-if)#exit
R1(config)#int s1/1
R1(config-if)#ip addr 202.110.101.1 255.255.255.0
R1(config-if)#encap hdlc
R1(config-if)#clock rate 56000
R1(config-if)#no shut
R1(config-if)#exit
R1(config)#router bgp 64500
R1(config-router)#neighbor 202.110.100.2 remote-as 64501
R1(config-router)#neighbor 172.16.20.1 remote-as 64501
R1(config-router)#net 192.168.10.0
R1(config-router)#net 172.16.0.0
R1(config-router)#net 202.110.100.0
R1(config-router)#net 202.110.101.0
R1(config-router)#exit
R1(config)#router rip
R1(config-router)#ver 2
R1(config-router)#net 192.168.10.0
R1(config-router)#net 172.16.0.0
R1(config-router)#net 202.110.100.0
R1(config-router)#net 202.110.101.

R2上：
R2(config)#int lo0
R2(config-if)#ip addr 172.16.20.1 255.255.0.0
R2(config-if)#no shut
R2(config-if)#int s1/0
R2(config-if)#ip addr 202.110.100.2 255.255.255.0
R2(config-if)#encap hdlc
R2(config-if)#no shut
R2(config-if)#int s1/1
R2(config-if)#ip addr 202.110.101.2 255.255.255.0
R2(config-if)#encap hdlc
R2(config-if)#no shut
R2(config-if)#exit

R2(config)#router bgp 64501
R2(config-router)#neighbor 202.110.100.1 remote-as 64500
R2(config-router)#neighbor 172.16.10.1 remote-as 64500
R2(config-router)#net 172.16.20.0
R2(config-router)#net 202.110.100.0
R2(config-router)#net 202.110.101.0
R2(config-router)#exit
R2(config)#router rip

R2(config)#router rip
R2(config-router)#ver 2
R2(config-router)#net 172.16.20.0
R2(config-router)#net 202.110.100.0
R2(config-router)#net 202.110.101.0
在R2上测试：

R2#show ip ro
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route

Gateway of last resort is not set

C 202.110.100.0/24 is directly connected, Serial1/0
R 192.168.10.0/24 [120/1] via 202.110.100.1, 00:00:02, Serial1/0
172.16.0.0/16 is variably subnetted, 2 subnets, 2 masks
C 172.16.20.0/24 is directly connected, Loopback0
R 172.16.0.0/16 [120/1] via 202.110.100.1, 00:00:02, Serial1/0

再次举例说明：





















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