VRRP实验

 

 AR1配置

interface GigabitEthernet0/0/0
 ip address 192.168.11.1 255.255.255.0 
#
interface GigabitEthernet0/0/1
 ip address 192.168.12.1 255.255.255.0 

interface LoopBack0
 ip address 100.100.100.100 255.255.255.255 
#
interface LoopBack1
 ip address 200.200.200.200 255.255.255.255 
#
ospf 1 router-id 1.1.1.1 
 area 0.0.0.0 
  network 100.100.100.100 0.0.0.0 
  network 192.168.11.0 0.0.0.255 
  network 192.168.12.0 0.0.0.255 
  network 200.200.200.200 0.0.0.0 

SW1配置

vlan batch 10 20

interface Vlanif1
 ip address 192.168.11.2 255.255.255.0
#
interface Vlanif10
 ip address 192.168.10.252 255.255.255.0
 vrrp vrid 10 virtual-ip 192.168.10.1   配置虚拟网关
 vrrp vrid 10 priority 120
 vrrp vrid 10 track interface GigabitEthernet0/0/1 reduced 30　　　　g0/0/1是条上行接口，用来做链路跟踪，当上行链路断开的时候避免数据包还要从原来的设备上转发数据包，
reduced 30当上行链路断开后，优先级降低30.

vrrp vrid 10 authentication-mode md5 jk7^<D5NF#'eKRQqbl+O`aW#

#
interface Vlanif20
 ip address 192.168.20.252 255.255.255.0
 vrrp vrid 20 virtual-ip 192.168.20.1

vrrp vrid 20 authentication-mode md5 H'z&USe)y-o\lT0$,T(B1cq#

interface GigabitEthernet0/0/2
 port link-type trunk
 port trunk allow-pass vlan 2 to 4094
#
interface GigabitEthernet0/0/3
 port link-type trunk
 undo port trunk allow-pass vlan 1
 port trunk allow-pass vlan 2 to 4094

ospf 1 router-id 2.2.2.2
import-route direct
area 0.0.0.0
network 192.168.11.2 0.0.0.0

SW2配置

vlan batch 10 20

interface Vlanif1
 ip address 192.168.12.2 255.255.255.0
#
interface Vlanif10
 ip address 192.168.10.253 255.255.255.0
 vrrp vrid 10 virtual-ip 192.168.10.1

vrrp vrid 10 authentication-mode md5 jk7^<D5NF#'eKRQqbl+O`aW#

#
interface Vlanif20
 ip address 192.168.20.253 255.255.255.0
 vrrp vrid 20 virtual-ip 192.168.20.1
 vrrp vrid 20 priority 120
 vrrp vrid 20 track interface GigabitEthernet0/0/1 reduced 30

vrrp vrid 20 authentication-mode md5 H'z&USe)y-o\lT0$,T(B1cq#

interface GigabitEthernet0/0/2
 port link-type trunk
 port trunk allow-pass vlan 2 to 4094
#
interface GigabitEthernet0/0/3
 port link-type trunk
 port trunk allow-pass vlan 2 to 4094

ospf 1 router-id 3.3.3.3
 import-route direct
 area 0.0.0.0
  network 192.168.12.2 0.0.0.0

SW3配置

vlan batch 10 20

interface GigabitEthernet0/0/1
 port link-type trunk
 port trunk allow-pass vlan 2 to 4094
#
interface GigabitEthernet0/0/2
 port link-type trunk
 port trunk allow-pass vlan 2 to 4094
#
interface GigabitEthernet0/0/3
 port link-type access
 port default vlan 10
#
interface GigabitEthernet0/0/4
 port link-type access
 port default vlan 20

PC配置

 

 

<SW1> dis vrrp brief
VRID  State        Interface                Type     Virtual IP     
----------------------------------------------------------------
10    Master       Vlanif10                 Normal   192.168.10.1   
20    Backup       Vlanif20                 Normal   192.168.20.1   
----------------------------------------------------------------
Total:2     Master:1     Backup:1     Non-active:0     
<SW1>

1 当交换机 lsw1和 lsw2作何一个断电或重启后，VLAN10 和 VLAN20 的主机和外网100.100.100.100的通信不会中断
（中间有短暂丢包）
2 当交换机 lsw1和 lsw2的任何一个上行链路关闭后，VLAN10 和 VLAN20 的主机和外网100.100.100.100的通信不会
中断（中间有短暂丢包）
3 当网络一切正常后，VLAN10 和 VLAN20 去网外的流量可以在 lsw1 和 lsw2上负载分担。