# Add virtual routers to Single Engine interfaces

Virtual Router Redundancy Protocol (VRRP) allows high-availability router configurations.

##

VRRP support is only available on Physical Interfaces, VLAN Interfaces, or Port Group Interfaces of Single Engines. One virtual router can be configured for each Physical Interface or VLAN Interface. The virtual router can have either backup or active status. The virtual router configured for one interface does not take into account the status of possible virtual routers configured on other interfaces. VRRP is only supported for static IPv4 addresses.

For more details about the product and how to configure features, click Help or press F1.

## Steps

1. In the IP Address properties, click VRRP Settings.
2. Select Enable VRRP.
3. Enter the ID, Priority, and IPv4 Address according to the configuration of the virtual router.
4. Click OK to close the VRRP Settings dialog box.
5. Click OK to close the IP Address Properties dialog box.
6. If you are creating a Engine, or if you want to change the roles the different interfaces have in the configuration, select system communication roles for engine interfaces.
7. Otherwise, click Save and Refresh.

## VRRP Settings dialog box

Use this dialog box to configure Virtual Router Redundancy Protocol (VRRP) settings that allow high availability router configurations.

Option | Definition
--- | ---
Enable VRRP | When selected, allows high availability router configurations.
ID | Specifies the virtual router ID.
Priority | Specifies the virtual router priority.
IPv4 Address | Specifies the virtual router IPv4 address.