The "Link-Fail-Signal" command allows us to force switches next to the Cluster Fortigate unit to refresh their MAC tables, which will be useful if the Switches do not refresh their MAC tables correctly.
Normally, after Link Failover, the new Primary sends Gratuitous ARP (GARP) packets to refresh the MAC forwarding tables of the switches connected to the Cluster.
In some cases, Switches ignore GARP packets and continue to reference the MAC address of the port. So the transaction fails on the Fortigate side and continues to send packets.
You can use the following command to prevent a Cluster unit with Monitored Interface connection from turning off all interfaces (except Heartbeat Interfaces and HA Mgmt Interfaces) after Link Failure occurs.
config system ha
set link-failed-signal enable
end
set link-failed-signal enable
end
If cluster computers are managed with a Mgmt interface, it must be specified, otherwise the port on which it is managed is Down.
config system ha
set link-failed-signal enable
end
set link-failed-signal enable
end
config system ha
set link-failed-signal enable
set ha-mgmt-interface "mgmt"
end
set link-failed-signal enable
set ha-mgmt-interface "mgmt"
end
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