What the relationship of update-static-route of Link Monitor and VRRP Failover

[Bruce7x2]

Topology：

HQFG(WAN1,10.100.100.6)----PE(10.100.100.21)--(WAN1)Remote-FG2(VRRP,172.100.10.254)

When I set "update-static-route" in the "link-monitor" configuration of Remote-FG2 to "disable," the VRRP Failover fails to switch, and the priority remains unchanged until I set "update-static-route" to "enable." However, I don't want my static routes to disappear as a result. How should I configure it?

Certainly, when I checked the status of the link-monitor using "diagnose sys link-monitor status," I confirmed that the link-monitor is in a "die" state.

Please assist me in clarifying and improving this issue. Thank you.

My VRRP config as the following:

config router static

    edit 1

        set gateway 10.100.100.21

        set device "port1"

        set link-monitor-exempt enable

    next

    edit 2

        set dst 10.100.100.6 255.255.255.255

        set gateway 10.100.100.21

        set device "port1"

    next

end

config system interface

    edit "port2"

        set vdom "root"

        config vrrp

            edit 24

                set vrgrp 24

                set vrip 172.100.10.254

                set priority 150

                set vrdst 10.100.100.6

                set vrdst-priority 75

            next

        end

config system link-monitor

    edit "monitor-fghq-port1"

        set srcintf "port1"

        set server "10.100.100.6"

        set failtime 3

set update-static-route enable

    next

end

[knagaraju · Accepted solution]

Hi Bruce Liu,

The Link Monitor updates static routes depending on changes in link availability, while VRRP Failover updates static routes when the master router in a VRRP group changes. Verify that you are monitoring the same interface in Link Monitor and VRRP!!

Regards
Nagaraju.

[knagaraju]

If link monitoring configured for Port1 fails it removes the corresponding routes in FIB, in your setup the VRRP destination is "10.100.100.6" so it's possible. 

Regards
Nagaraju.