Digi IX20W-PR User Manual page 460

Routing
9. For Priority modifier, type or select the amount that the device's priority should be decreased
due to SureLink connectivity failure, and increased when SureLink succeeds again.
Along with the priority settings for devices in this VRRP pool, the amount entered here should
be large enough to automatically demote a master device when SureLink connectivity fails. For
example, if the VRRP master device has a priority of 100 and the backup device has a priority
of 80, then the Priority modifier should be set to an amount greater than 20 so that if
SureLink fails on the master, it will lower its priority to below 80, and the backup device will
assume the master role.
10. Configure the VRRP interface. The VRRP interface is defined in the Interface parameter of the
VRRP configuration, and generally should be a LAN interface:
To configure the VRRP interface:
a. Click to expand Network > Interfaces.
b. Click to expand the appropriate VRRP interface (for example, LAN1).
c. For backup devices, for Default Gateway, type the IP address of the VRRP interface on the
master device.
d. Configure the VRRP interface's DHCP server to use a custom gateway that corresponds to
one of the VRRP virtual IP addresses:
i. Click to expand DHCP Server > Advanced settings.
ii. For Gateway, select Custom.
iii. For Custom gateway, enter the IP address of one of the virtual IPs used by this VRRP
IX20 User Guide
Virtual Router Redundancy Protocol (VRRP)
460