Creating a VRRP Group

You can create a Virtual Router Redundancy Protocol (VRRP) backup group and set VRRP priorities to determine the master and backup routers. The master router transmits data traffic. You can create multiple VRRP groups to load-balance data traffic.

Context

VRRP load balancing is classified as multi-gateway load balancing.

Multi-gateway load balancing: Multiple VRRP groups with virtual IP addresses are created and specified as gateways for different users to implement load balancing.

Figure 1 Multi-gateway load balancing
As shown in Figure 1, VRRP groups 1 and 2 are deployed on the network.
- VRRP group 1: Device A is the master device, and Device B is the backup device.
- VRRP group 2: Device B is the master device, and Device A is the backup device.
Some users access the Internet using VRRP group 1, and others access the Internet using VRRP group 2. The backup groups can load-balance service traffic and back up each other.

Procedure

Create a VRRP group working in master/backup mode.
1. Run system-view
  The system view is displayed.
2. Run interface interface-type interface-number
  The interface view is displayed.
3. Run vrrp vrid virtual-router-id virtual-ip virtual-address
  A VRRP group is created and assigned a virtual IP address.
  - VRRP groups cannot share virtual IP addresses.
  - Two devices in a single VRRP group must be configured with the same virtual router ID (VRID).
  - VRRP groups on different interfaces of a device can be configured with the same VRID.
  Multiple virtual IP addresses can be assigned to a VRRP group. A single virtual IP address serves a separate user group, in which users have the same reliability requirements. This setting helps prevent the default gateway addresses from varying according to changes in VRRP device locations.
  
  A VRRP group is created and assigned the first virtual IP address at the same time. If another virtual IP address is assigned to the VRRP group, the system only adds the virtual IP address to the virtual IP address list for the VRRP group.
  
  The direct routes generated by the virtual IP addresses in a VRRP group can be imported by OSPF, IS-IS and RIP. By default, this kind of route can be advertised by OSPF, IS-IS and RIP to the neighboring devices. On actual networks, it is possible that there are a large number of routes generated by the virtual IP addresses in a VRRP group; if all of the routes are imported and advertised to the neighboring devices by OSPF, IS-IS and RIP, it will bring a heavy load to some devices on the networks and affect the network performance. In this situation, you can use the vrrp virtual-ip route-advertise disable command to disable OSPF, IS-IS and RIP from advertising the routes generated by the virtual IP addresses in the VRRP group.
4. Run vrrp vrid virtual-router-id priority priority-value
  - The master device's priority must be higher than a backup device's priority. Using the default priority on a backup device is recommended.
  - If devices have the same VRRP priority, the device that enters the Master state earlier than others is the master device. Other devices are backup devices and stop preempting the Master state.
5. Run commit
  The configuration is committed.
Create VRRP groups working in multi-gateway load balancing mode.
If VRRP groups need to work in multi-gateway load balancing mode, repeat the steps to configure two or more VRRP groups on the interface and assign different VRIDs to them.