Digi LR54 User Manual page 419

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7. (Optional) For backup devices, enable the ability for the device to monitor the master device.

This allows a backup VRRP device to monitor the master device, and increase its priority when

the master device is failing SureLink tests. This can allow a device functioning as a backup

device to promote itself to master.

(config)> network vrrp VRRP_test vrrp_plus monitor_master true

8. Configure the VRRP interface:

a. Configure the VRRP interface's DHCP server to use a custom gateway that corresponds to

one of the VRRP virtual IP addresses:

i. Set the DHCP server gateway type to custom:

(config)> network interface lan1 ipv4 dhcp_server advanced gateway

ii. Determine the VRRP virtual IP addresses:

(config)> show network vrrp VRRP_test virtual_address

0 192.168.3.3

1 10.10.10.1

iii. Set the custom gateway to one of the VRRP virtual IP addresses. For example:

(config)> network interface lan1 ipv4 dhcp_server advanced

gateway_custom 192.168.3.3

b. For backup devices, set the default gateway to the IP address of the VRRP interface on the

master device. For example:

(config)> network interface lan1 ipv4 gateway 192.168.3.1

c. For backup devices, enable and configure SureLink on the VRRP interface.

i. Determine the VRRP interface. Generally, this should be a LAN interface; VRRP+ will

then monitor the LAN using SureLink to determine if the interface has network

connectivity and promote a backup to master if SureLink fails.

(config)> show network vrrp VRRP_test interface

/network/interface/lan1

ii. Enable SureLink on the interface:

(config)> network interface lan1 ipv4 surelink enable true

LR54 User Guide

Virtual Router Redundancy Protocol (VRRP)