比较全面的三层交换机配置实例(带命令解释哟!)


Enable //进入私有模式 
    
Configure terminal //进入全局模式 
    
service password-encryption //对密码进行加密 
    
hostname Catalyst 3550-12T1 //给三层交换机定义名称 
    
enable password 123456. //enable密码 
    
Enable secret 654321 //enable的加密密码(应该是乱码而不是654321这样) 
    
Ip subnet-zero //允许使用全0子网(默认都是打开的) 
    
Ip name-server 172.16.8.1 172.16.8.2 //三层交换机名字Catalyst 3550-12T1对应的IP地址是172.16.8.1 
    
Service dhcp //提供DHCP服务 
    
ip routing //启用三层交换机上的路由模块



Exit 
    
Vtp mode server //定义VTP工作模式为sever模式 
    
Vtp domain centervtp //定义VTP域的名称为centervtp 
    
Vlan 2 name vlan2 //定义vlan并给vlan取名(如果不取名的话,vlan2的名字应该是vlan002) 
    
Vlan 3 name vlan3 
    
Vlan 4 name vlan4 
    
Vlan 5 name vlan5 
    
Vlan 6 name vlan6 
    
Vlan 7 name vlan7 
    
Vlan 8 name vlan8 
    
Vlan 9 name vlan9 
    
Exit



interface Port-channel 1 //进入虚拟的以太通道组1 
    
switchport trunk encapsulation dot1q //给这个接口的trunk封装为802.1Q的帧格式 
    
switchport mode trunk //定义这个接口的工作模式为trunk 
    
switchport trunk allowed vlan all //在这个trunk上允许所有的vlan通过 
    
Interface gigabitethernet 0/1 //进入模块0上的吉比特以太口1 
    
switchport trunk encapsulation dotlq //给这个接口的trunk封装为802.1Q的帧格式 
    
switchport mode trunk //定义这个接口的工作模式为trunk 
    
switchport trunk allowed vlan all //在这个trunk上允许所有的vlan通过 
    
channel-group 1 mode on //把这个接口放到快速以太通道组1中 
    
Interface gigabitethernet 0/2 //同上 
    
switchport trunk encapsulation dotlq 
    
switchport mode trunk 
    
switchport trunk allowed vlan all 
    
channel-group 1 mode on


port-channel load-balance src-dst-ip //定义快速以太通道组的负载均衡方式(依*源和目的IP的方式) 
    
interface gigabitethernet 0/3 //进入模块0上的吉比特以太口3 
    
switchport trunk encapsulation dotlq //给trunk封装为802.1Q 
    
switchport mode trunk //定义这个接口的工作模式为trunk


switchport trunk allowed vlan all //允许所有vlan信息通过


interface gigabitethernet 0/4 //同上 
    
switchport trunk encapsulation dotlq 
    
switchport mode trunk 
    
switchport trunk allowed vlan all


interface gigbitethernet 0/5 //同上 
    
switchport trunk encapsulation dotlq 
    
switchport mode trunk 
    
switchport trunk allowed vlan all



interface gigbitethernet 0/6 //同上 
    
switchport trunk encapsulation dotlq 
    
switchport mode trunk 
    
switchprot trunk allowed vlan all



interface gigbitethernet 0/7 //进入模块0上的吉比特以太口7 
    
Switchport mode access //定义这个接口的工作模式为访问模式 
    
switchport access vlan 9 //定义这个接口可以访问哪个vlan(实际就是分配这个接口到vlan) 
    
no shutdown 
    
spanning-tree vlan 6-9 cost 1000 //在生成树中,vlan6-9的开销定义为10000

 



interface range gigabitethernet 0/8 – 10 //进入模块0上的吉比特以太口8,9,10 
    
switchport mode access //定义这些接口的工作模式为访问模式 
    
switchport access vlan 8 //把这些接口都分配到vlan8中 
    
no shutdown 
    
spanning-tree portfast //在这些接口上使用portfast(使用portfast以后,在生成树的时候不参加运算,直接成为转发状态)


interface gigabitethernet 0/11 //进入模块0上的吉比特以太口11 
    
switchport trunk encapsulation dotlq //给这个接口封装为802.1Q 
    
switchport mode trunk //定义这个接口的工作模式为trunk 
    
switchport trunk allowed vlan all //允许所有vlan信息通过



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


转载于:https://blog.51cto.com/it815/124537