中小企业利用VRRP实现链路负载均衡

三层交换机上配置 VRRP ：

配置步骤：
1.配置PC
2.配置交换机
接入层交换机-SW3
核心层交换机-SW1/2

#首先配置 VLAN
sw1/2/3:
vlan batch 10 20 -> 同时创建 vlan 10 / 20 ；

#其次配置 SW3 与 PC 的互联
sw3:
interface gi0/0/1
port link-type access
port default vlan 10
interface gi0/0/2
port link-type access
port default vlan 20

#再次配置 SW3 与 SW1/2 的互联：
SW3：
interface gi0/0/13
port link-type trunk
port trunk allow-pass vlan all
interface gi0/0/23
port link-type trunk
port trunk allow-pass vlan all

 SW1: 
    interface gi0/0/13 
       port link-type trunk 
       port trunk allow-pass vlan all 

 SW2: 
    interface gi0/0/23 
       port link-type trunk 
       port trunk allow-pass vlan all 

#最后配置 vlan 10 与 vlan 20 的网关IP ，并启用 VRRP

  SW1： 
     interface  vlanif 10 
       ip address 192.168.10.251 

255.255.255.0

       vrrp vrid 10 virtual-ip 192.168.10.250 

       vrrp vrid 10 priority 150 

     interface vlanif 20 
       ip address 192.168.20.251 

255.255.255.0

       vrrp vrid 20 virtual-ip 192.168.20.250 

  SW2： 
     interface  vlanif 10 
       ip address 192.168.10.252 

255.255.255.0

       vrrp vrid 10 virtual-ip 192.168.10.250 

     interface vlanif 20 
       ip address 192.168.20.252 

255.255.255.0

       vrrp vrid 20 virtual-ip 192.168.20.250 

       vrrp vrid 20 priority 150