实验<1>
rip的secondary的地址
  第一步
基本配置
r1
inter s1
ip add 172.16.1.0 255.255.255.0
clock rate 64000
no shut
inter s0
ip add 172.16.2.1 255.255.255.0
clock rate 64000
no shut
router rip
net 172.16.0.0

r2
inter s1
ip add 172.16.2.2 255.255.255.0
no shut
inter s0
ip add 192.168.1.1 255.255.255.0
clock rate 64000
no shut
route rip
net 172.16.0.0
net 192.168.1.0
r3
inter s1
ip add 192.168.1.2 255.255.255.0
clock rate 64000
no shut
inter s0
ip add 172.16.3.1 255.255.255.0
clock rate 64000
no shut
router rip
net 192.168.1.0 
net 172.16.0.0

r4
inter s1
ip add 172.16.3.2 255.255.255.0
clock rate 640000
no shut
inter s0
ip add 176.16.4.1 255.255.255.0
clock rate 64000
no shut
router router
net 172.16.0.
当这些都配好之后还是学不 到路由表
怎么办了
第二步
配一个补助ip地址  在 r2和r3之间s1 s0
r2
inter s0
ip add 172.16.5.1 255.255.255.0
no shut
r3
inter s1
ip add 172.16.5.2 255.255.255.0
no shut
这样我们的实验就做完了
注意:  补助地址可以是用过的地址 eg; 172.16.3.0 172.16.2.0