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interface gigabitethernet 0/12 //同上
switchport trunk encapsulation dotlq
switchport mode trunk
switchport trunk allowed vlan all
interface vlan 1 //进入vlan1的逻辑接口（不是物理接口，用来给vlan做路由用）
ip address 172.16.1.7 255.255.255.0 //配置IP地址和子网掩码
no shutdown
standby 1 ip 172.16.1.9 //开启了冗余热备份（HSRP），冗余热备份组1，虚拟路由器的IP地址为172.16.1.9
standby 1 priority 110 preempt //定义这个三层交换机在冗余热备份组1中的优先级为110，preempt是用来开启抢占模式
interface vlan 2 //同上
ip address 172.16.2.252 255.255.255.0
no shutdown
standby 2 ip 172.16.2.254
standby 2 priority 110 preempt
ip access-group 101 in //在入方向上使用扩展的访问控制列表101
interface vlan 3 //同上
ip address 172.16.3.252 255.255.255.0
no shutdown
standby 3 ip 172.16.3.254
standby 3 priority 110 preempt
ip access-group 101 in
interface vlan 4 //同上
ip address 172.16.4.252 255.255.255.0
no shutdown
standby 4 ip 172.16.4.254
standby 4 priority 110 preempt
ip access-group 101 in
interface vlan 5
ip address 172.16.5.252 255.255.255.0
no shutdown
standby 5 ip 172.16.5.254
standby 5 priority 110 preempt
ip access-group 101 in
interface vlan 6
ip address 172.16.6.252 255.255.255.0
no shutdown
standby 6 ip 172.16.6.254
standby 6 priority 100 preempt
interface vlan 7
ip address 172.16.7.252 255.255.255.0
no shutdown
standby 7 ip 172.16.7.254
standby 7 priority 100 preempt
interface vlan 8
ip address 172.16.8.252 255.255.255.0
no shutdown
standby 8 ip 172.16.8.254
standby 8 priority 100 preempt
interface vlan 9
ip address 172.16.9.252 255.255.255.0
no shutdown
standby 9 ip 172.16.9.254
standby 9 priority 100 preempt
access-list 101 deny ip any 172.16.7.0 0.0.0.255 //扩展的访问控制列表101
access-list 101 permit ip any any
Interface vlan 1 //进入vlan1这个逻辑接口
Ip helper-address 172.16.8.1 //可以转发广播（helper－address的作用就是把广播转化为单播，然后发向172.16.8.1）
Interface vlan 2
Ip helper-address 172.16.8.1
Interface vlan 3
ip helper-address 172.16.8.1
interface vlan 4
ip helper-address 172.16.8.1
interface vlan 5
ip helper-address 172.16.8.1
interface vlan 6
ip helper-address 172.16.8.1
interface vlan 7
ip helper-address 172.16.8.1
interface vlan 9
ip helper-address 172.16.8.1
router rip //启用路由协议RIP
version 2 //使用的是RIPv2，如果没有这句，则是使用RIPv1
network 172.16.0.0 //宣告直连的网段
exit
ip route 0.0.0.0 0.0.0.0 172.16.9.250 //缺省路由，所有在路由表中没有办法匹配的数据包，都发向下一跳地址为172.16.9.250这个路由器
line con 0
line aux 0
line vty 0 15 //telnet线路（路由器只有5个，是0-4）
password 12345678 //login密码
login
end
copy running-config startup-config 保存配置
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