实验：
r1:
int lo0
ip add 1.1.1.1 255.255.255.0
int s1/0
no sh
ip add 12.1.1.1 255.255.255.0
router eigrp 100
no au
net 12.0.0.0
net 1.0.0.0
r2:
int s1/0
no sh
ip add 12.1.1.2 255.255.255.0
int lo0
ip add 2.2.2.2 255.255.255.0
int s1/1
ip add 23.1.1.2 255.255.255.0
no sh
router eigrp 100
no au
net 12.0.0.0
net 2.0.0.0
net 23.0.0.0
no au
r3:
int s1/1
ip add 23.1.1.3 255.255.255.0
no sh
int lo0
ip add 3.3.3.3 255.255.255.0
int lo8
ip add 8.8.8.8 255.255.255.0
int lo9
ip add 9.9.9.9 255.255.255.0
router eigrp 100
no au
net 23.0.0.0
net 3.0.0.0
net 8.0.0.0
net 9.0.0.0
r3:
access-list 10 deny host 9.9.9.9
access-list 10 permit any
router eigrp 100
distanbute-list 10 out s1/1
r2:
router rip
ver 2
no au
net 23.0.0.0
r3:
router rip
ver 2
no au
net 0.0.0.0
r2:
router eigrp 100
redistrubute rip met 1000 1000 255 1 1500
router rip
redistrubute eigrp 100 metric 1
access-list 10 deny host 9.9.9.9
access-list 10 permit any
router rip
distribute-list 10 in s1/1
