Configure VBRP Basic Mode

Network Requirements

• Enable VBRP between Device1 and Device2; Device1 and Device2 share one virtual IP address, realizing the backup for the default gateway of the user host and reducing the network interruption time.

Network Topology

Figure 7-2 Networking of VBRP basic mode

Configuration Steps

Step 1: Configure VLAN and add the port to the corresponding VLAN.(Omitted)

Step 2: Configure the IP address of the interface.(Omitted)

Step 3: Create the VBRP group.

#Configure VBRP group 1 on Device1; the virtual IP address is 10.1.1.10; enable the preemption mode; configure the priority as 110.

#Configure VBRP group 1 on Device2; the virtual IP address is 10.1.1.10; enable the preemption mode;

Step 4: Check the result.

#View the VBRP status of Device1.

Device1#show standby
Interface vlan2 
  Primary address 10.1.1.1, state up
Group 1 
  State is Active 
  Virtual IP address is 10.1.1.10 
  Refer to local IP prefix 193.168.1.1/24 
  Local virtual MAC address is 0000.0c07.ac01 
  Current MAC type VMAC, installed into HW 
  Hello time 3 sec, hold time 10 sec 
    Next hello sent in 0.633348 secs 
  Preemption enabled, delay 0 sec 
  Active router is local 
  Standby router is 10.1.1.2,priority 100 (expires in 8.466648 secs) 
  Priority 110 (configured 110) 

#View the VBRP status of Device2.

Device2#show standby  
Interface vlan2 
  Primary address 10.1.1.2, state up
Group 1 
  State is Standby 
  Virtual IP address is 10.1.1.10 
  Refer to local IP prefix 10.1.1.2/24 
  Local virtual MAC address is 0000.0c07.ac01 
  Current MAC type VMAC 
  Hello time 3 sec, hold time 10 sec 
    Next hello sent in 0.450022 secs 
  Preemption enabled, delay 0 sec 
  Active router is 10.1.1.1, priority 110 (expires in 7.266656 secs) 
  Standby router is local 
  Priority 100 (configured 100)

From the VBRP status, we can see that the VBRP priority of Device1 is 110, the status is Active, and the VBRP status of Device2 is Standby. After Device1 fails, Device2 automatically switches to Active for forwarding data.

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  The election principle of the VRRP status is by priority. The one with large priority is Active. If the priorities are the same, compare according to the IP address of the interface. The one with large IP address is Active.
• By default, VBRP works in the non-preemption mode. The preemption mode needs to be configured manually. It is recommended to configure as the preemption mode.
• The default priority of VBRP is 100.

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