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Example of VRRP single backup group configuration

Networking requirements

Host A needs to access Host Bjigeng Host An on Internet. The default gateway for Host An is 10.1.1.111Plus 24.

When Switch An is working properly, the message sent by Host A to Host B is forwarded through Switch A; when Switch An appears

In the event of a failure, the message sent by Host A to Host B is forwarded through Switch B.

Group Network Diagram:

#

Configuration step

Note: IntranetSwitch is only used for exchange, and no configuration is required in this example.

(1) configure Switch A

Configure VLAN2

System-view

[SwitchA] vlan 2

[SwitchA-vlan2] port gigabitethernet 1-0-11

[SwitchA-vlan2] quit

[SwitchA] interface vlan-interface 2

[SwitchA-Vlan-interface2] ip address 10.1.1.1 255.255.255.0

[SwitchA-Vlan-interface2] quit

[SwitchA] vlan 3

[SwitchA-vlan3] port gigabitethernet 1-0-13

[SwitchA-vlan3] quit

[SwitchA] interface vlan-interface 3

[SwitchA-Vlan-interface3] ip address 10.1.3.1 255.255.255.0

[SwitchA-Vlan-interface3] quit

[SwitchA] ip route-static 0.0.0.0 0 10.1.3.2

# create backup group 1 and the IP address is 10.1.1.111

[SwitchA] inter vlan 2

[SwitchA-Vlan-interface2] vrrp vrid 1 virtual-ip 10.1.1.111

Set the priority of Switch An in backup group 1 to 110, which is higher than that of Switch B, to ensure the success of Switch A.

It is responsible for forwarding traffic for Master.

[SwitchA-Vlan-interface2] vrrp vrid 1 priority 110

Set Switch A to work in preemptive mode to ensure that after Switch A fault recovery, it can be preempted to become Master again, that is, as long as

When Switch An is working properly, Switch An is responsible for forwarding traffic. To avoid frequent state switching, configure preemption delay

The interval is 5 seconds.

[SwitchA-Vlan-interface2] vrrp vrid 1 preempt-mode delay 500

(2) configure Switch B

# configure VLAN2.

System-view

[SwitchB] vlan 2

[SwitchB-Vlan2] port gigabitethernet 1-0-12

[SwitchB-vlan2] quit

[SwitchB] interface vlan-interface 2

[SwitchB-Vlan-interface2] ip address 10.1.1.2 255.255.255.0

[SwitchB-Vlan-interface2] quit

[SwitchB] vlan 3

[SwitchB-vlan3] port gigabitethernet 1-0-14

[SwitchB-vlan3] quit

[SwitchB] interface vlan-interface 3

[SwitchB-Vlan-interface3] ip address 10.1.4.1 255.255.255.0

[SwitchB-Vlan-interface3] quit

[SwitchB] ip route-static 0.0.0.0 0 10.1.4.2

# create backup group 1 and configure the virtual IP address of backup group 1 to be 10.1.1.111.

[SwitchB] interface vlan-interface 2

[SwitchB-Vlan-interface2] vrrp vrid 1 virtual-ip 10.1.1.111

# set the priority of Switch B in backup group 1 to 100.

[SwitchB-Vlan-interface2] vrrp vrid 1 priority 100

Set Switch B to work in preemptive mode with a preemption delay of 5 seconds.

[SwitchB-Vlan-interface2] vrrp vrid 1 preempt-mode delay 500

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