昨天已经和大家介绍过VRRP，并且带大家实操过。
但是这个实验图太片面，因为公司正常办公的时候，内网所连接的PC机与网段肯定不止一个。所以接下来我带大家拓展一下VRRP技术备份的实操。
如下：
图中SW2与SW3代替路由器，充当网关作用
案例： VRRP的负载均衡
-vlan 10 / 20 的主网关配置在SW2 上；
-vlan 30 / 40 的主网关配置在SW3 上；
配置思路：
1.配置终端
PC-1/2/3/4 （X 为 vlan 号）
ip : 192.168.x.1
mask : 255.255.255.0
gaetway : 192.168.x.254
Server
ip : 10.10.10.1
mask : 255.255.255.0
gaetway : 10.10.10.254
2.配置网络设备：
SW1命令
[SW1]vlan batch 10 20 30 40
[SW1]int e0/0/1
[SW1-Ethernet0/0/1]port link-type access
[SW1-Ethernet0/0/1]port default vlan 10
[SW1-Ethernet0/0/1]int e0/0/2
[SW1-Ethernet0/0/2]port link-type access
[SW1-Ethernet0/0/2]port default vlan 20
[SW1-Ethernet0/0/2]int e0/0/3
[SW1-Ethernet0/0/3]port link-type access
[SW1-Ethernet0/0/3]port default vlan 30
[SW1-Ethernet0/0/3]int e0/0/4
[SW1-Ethernet0/0/4]port link-type access
[SW1-Ethernet0/0/4]port default vlan 40
[SW1]int e0/0/5
[SW1-Ethernet0/0/5]port link-type trunk
[SW1-Ethernet0/0/5]port trunk allow-pass vlan all
[SW1-Ethernet0/0/5]int e0/0/6
[SW1-Ethernet0/0/6]port link-type trunk
[SW1-Ethernet0/0/6]port trunk allow-pass vlan all
SW2命令
[SW2]vlan batch 10 20 30 40
[SW2]int e0/0/1
[SW2-Ethernet0/0/1]port link-type trunk
[SW2-Ethernet0/0/1]port trunk allow-pass vlan all
[SW2-Ethernet0/0/1]q
[SW2]int Vlanif 10
[SW2-Vlanif10]ip address 192.168.10.251 24
[SW2-Vlanif10]vrrp vrid 100 virtual-ip 192.168.10.254
[SW2-Vlanif10]vrrp vrid 100 priority 200
[SW2-Vlanif10]int v20
[SW2-Vlanif20]ip address 192.168.20.251 24
[SW2-Vlanif20]vrrp vrid 100 virtual-ip 192.168.20.254
[SW2-Vlanif20]vrrp vrid 100 priority 200
[SW2-Vlanif20]int v30
[SW2-Vlanif30]ip address 192.168.30.251 24
[SW2-Vlanif30]vrrp vrid 100 virtual-ip 192.168.30.254
[SW2-Vlanif30]int v40
[SW2-Vlanif40]ip address 192.168.40.251 24
[SW2-Vlanif40]vrrp vrid 100 virtual-ip 192.168.40.254
[SW2]vlan 100
[SW2-vlan100]q
[SW2]int e0/0/2
[SW2-Ethernet0/0/2]port link-type access
[SW2-Ethernet0/0/2]port default vlan 100
[SW2-Ethernet0/0/2]int v100
[SW2-Vlanif100]ip address 192.168.100.251 24
[SW2]ip route-static 10.10.10.0 24 192.168.100.1
SW3命令
[SW3]vlan batch 10 20 30 40
[SW3]int e0/0/1
[SW3-Ethernet0/0/1]port link-type trunk
[SW3-Ethernet0/0/1]port trunk allow-pass vlan all
[SW3]int Vlanif 30
[SW3-Vlanif30]ip address 192.168.30.252 24
[SW3-Vlanif30]vrrp vrid 100 virtual-ip 192.168.30.254
[SW3-Vlanif30]vrrp vrid 100 priority 200
[SW3-Vlanif30]int v40
[SW3-Vlanif40]ip address 192.168.40.252 24
[SW3-Vlanif40]vrrp vrid 100 virtual-ip 192.168.40.254
[SW3-Vlanif40]vrrp vrid 100 priority 200
[SW3]int Vlanif 10
[SW3-Vlanif10]ip address 192.168.10.252 24
[SW3-Vlanif10]vrrp vrid 100 virtual-ip 192.168.10.254
[SW3-Vlanif10]int v20
[SW3-Vlanif20]ip address 192.168.20.252 24
[SW3-Vlanif20]vrrp vrid 100 virtual-ip 192.168.20.254
[SW3]vlan 200
[SW3]int e0/0/2
[SW3-Ethernet0/0/2]port link-type access
[SW3-Ethernet0/0/2]port default vlan 200
[SW3-Ethernet0/0/2]q
[SW3]int v200
[SW3-Vlanif200]ip address 192.168.200.252 24
[SW3-Vlanif200]q
[SW3]ip route-static 10.10.10.0 24 192.168.200.1
AR命令
[AR]int g0/0/0
[AR-GigabitEthernet0/0/0]ip address 192.168.100.1 24
[AR-GigabitEthernet0/0/0]int g0/0/1
[AR-GigabitEthernet0/0/1]ip address 192.168.200.1 24
[AR-GigabitEthernet0/0/1]int g2/0/0
[AR-GigabitEthernet2/0/0]ip address 10.10.10.254 24
[AR-GigabitEthernet2/0/0]q
[AR]ip route-static 192.168.0.0 255.255.0.0 192.168.100.251
[AR]ip route-static 192.168.0.0 255.255.0.0 192.168.200.252
测试：各PC机ping一下Server
结论：链路正常，正常通信。
尝试关闭SW2（SW3不变），使其产生故障，再测试一次各PC端通信，仍然正常。
尝试关闭SW3（SW2不变），使其产生故障，再测试一次各PC端通信，仍然正常。