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VRRP 虚拟路由冗余协议

2026-05-12
2026-05-12
网络类
VRRP 虚拟路由冗余协议

实验要求:

配置 VRRP，使 LSW1、LSW2 同时为 VLAN10、VLAN20 提供冗余网关
VLAN10:
虚拟网关：192.168.10.254
LSW1 为 Master，LSW2 为 Backup
VLAN20:
虚拟网关：192.168.20.254
LSW2 为 Master，LSW1 为 Backup
实现负载分担 + 双主互备:

LSW1: vlan10主，vlan20备

system-view
undo info-center enable 
sysname LSW1
vlan batch 10 20

#基础端口配置
interface GigabitEthernet 0/0/23
 port link-type trunk
 port trunk allow-pass vlan all #允许所有vlan通过
interface GigabitEthernet 0/0/24
 port link-type trunk
 port trunk allow-pass vlan all #允许所有vlan通过
quit

#配置vlan接口ip
interface Vlanif 10
 ip address 192.168.10.252 255.255.255.0 #子网掩码可缩写为24
interface Vlanif 20
 ip address 192.168.20.252 255.255.255.0 #子网掩码可缩写为24

#vlan 10 VRRP主设备
nterface Vlanif 10
 vrrp vrid 10 virtual-ip 192.168.10.254
 vrrp vrid 10 priority 120
 vrrp vrid 10 preempt-mode timer delay 0  # 立即抢占
#vlan 20 VRRP备设备
interface Vlanif 20
 vrrp vrid 20 virtual-ip 192.168.20.254
 quit
 
#保存配置
quit
save
y

LSW2:

system-view
undo info-center enable 
sysname LSW2
vlan batch 10 20

#基础端口配置
interface GigabitEthernet 0/0/23
 port link-type trunk
 port trunk allow-pass vlan all #允许所有vlan通过
interface GigabitEthernet 0/0/24
 port link-type trunk
 port trunk allow-pass vlan all #允许所有vlan通过
 quit
#配置vlan接口ip
interface Vlanif 10
 ip address 192.168.10.253 255.255.255.0
interface Vlanif 20
 ip address 192.168.20.253 255.255.255.0

#vlan 10 VRRP备设备
interface Vlanif 10
 vrrp vrid 10 virtual-ip 192.168.10.254
#vlan 20 VRRP主设备
interface Vlanif 20
 vrrp vrid 20 virtual-ip 192.168.20.254
 vrrp vrid 20 priority 120
 vrrp vrid 20 preempt-mode timer delay 0
 quit
 
#保存配置
quit
save
y

LSW3:

system-view
undo info-center enable 
sysname LSW3
vlan batch 10 20

#基础端口配置
interface GigabitEthernet 0/0/1
 port link-type trunk
 port trunk allow-pass vlan all #允许所有vlan通过
interface GigabitEthernet 0/0/2
 port link-type trunk
 port trunk allow-pass vlan all #允许所有vlan通过
interface Ethernet 0/0/1
 port link-type access
 port default vlan 10
interface Ethernet 0/0/2
 port link-type access
 port default vlan 20
 quit
 
#保存配置
quit
save
y

PC配置:

PC1:

ip:192.168.10.1/24
网关:192.168.10.254

PC2：

ip:192.168.20.1/24
网关:192.168.20.254

验证与测试

在LSW1上输入:

display vrrp brief

#输出结果应为
VRID  State        Interface                Type     Virtual IP     
----------------------------------------------------------------
10    Master       Vlanif10                 Normal   192.168.10.254 
20    Backup       Vlanif20                 Normal   192.168.20.254 
----------------------------------------------------------------
Total:2     Master:1     Backup:1     Non-active:0

在LSW2上输入:

display vrrp brief

#输出结果应为
VRID  State        Interface                Type     Virtual IP     
----------------------------------------------------------------
10    Backup       Vlanif10                 Normal   192.168.10.254 
20    Master       Vlanif20                 Normal   192.168.20.254 
----------------------------------------------------------------
Total:2     Master:1     Backup:1     Non-active:0

使用PC1 长时间ping PC2

ping -t 192.168.20.1

模拟线路故障，关闭LSW1的上行接口，观察ping
看到ping只会丢1~2个数据包后恢复连通性

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