拓扑图是利用route-map控制重分发的那个实验一样的，这里不需要r4路由器大家可以把它忽略掉。
上一篇我讲过控制路由重分发有两种工具，route-map和分发列表。route-map已经讲过，这一个实验就是利用分发列表来控制路由重分发的。
废话不多说了，先讲讲拓扑结构。3台路由器，其中r1上运行ripv2，在r1上有4个环回接口。r2为asbr路由器，分别运行着ripv2和ospf，r3也为ospf。
r1:
in e1/1
ip add 192.168.1.2 255.255.255.0
no sh
in e1/0
ip add 192.168.2.1 255.255.255.0
no sh
in loop 1
ip add 172.16.0.1 255.255.255.0
in loop 2
ip add 172.16.1.1 255.255.255.0
in loop 3
ip add 172.16.2.1 255.255.255.0
in loop 4
ip add 172.16.3.1 255.255.255.0
router rip
version 2
no au
net 192.168.1.0
net 192.168.2.0
net 172.16.0.0
r2:
in e1/1
ip add 192.168.2.2 255.255.255.0
no sh
in e1/0
ip add 192.168.3.1 255.255.255.0
no sh
router rip
version 2
net 192.168.2.0
redistribute ospf 1 metric 2 重分发ospf路由到rip
router ospf 1
net 192.168.3.1 0.0.0.0 a 0
redistribute rip metric-type 1 subnets
distribute-list 1 out rip 这条命令分发列表应用access-list 1
access-list 1 permit 172.16.1.0 0.0.0.255
access-list 1 permit 172.16.2.0 0.0.0.255 这3条acl控制匹配哪些路由条目，允许的将会被重分发
access-list 1 permit 192.168.1.0 0.0.0.255
r3:
in e1/1
ip add 192.168.3.2 255.255.255.0
no sh
ip ospf 1 a 0
看看效果，在r3上我们只重分发了匹配acl1的3条路由条目，而且把分发类型改为了1类，而默认是2类。
R3#show ip rou
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
172.16.0.0/24 is subnetted, 2 subnets
O E1 172.16.1.0 [110/30] via 192.168.3.1, 00:32:06, Ethernet1/1
O E1 172.16.2.0 [110/30] via 192.168.3.1, 00:32:06, Ethernet1/1
O E1 192.168.1.0/24 [110/30] via 192.168.3.1, 00:32:06, Ethernet1/1
C 192.168.3.0/24 is directly connected, Ethernet1/1
而这个是没有应用分发列表前的路由条目
r3#show ip rou
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
172.16.0.0/24 is subnetted, 4 subnets
O E1 172.16.0.0 [110/30] via 192.168.3.1, 00:00:15, Ethernet1/1
O E1 172.16.1.0 [110/30] via 192.168.3.1, 00:01:20, Ethernet1/1
O E1 172.16.2.0 [110/30] via 192.168.3.1, 00:01:20, Ethernet1/1
O E1 172.16.3.0 [110/30] via 192.168.3.1, 00:00:14, Ethernet1/1
O E1 192.168.1.0/24 [110/30] via 192.168.3.1, 00:01:20, Ethernet1/1
O E1 192.168.2.0/24 [110/30] via 192.168.3.1, 00:00:14, Ethernet1/1
C 192.168.3.0/24 is directly connected, Ethernet1/1
而分别ping也验证了确实达到了控制重分发条目的目的
R3#ping 192.168.1.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.1.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 12/57/100 ms
R3#ping 172.16.3.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.16.3.1, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
R3#ping 172.16.1.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.16.1.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 16/45/88 m
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