Issue
If either member of a FireCluster configured in active/active mode has a health index below 100, Link Monitoring for multiple external interfaces will fail. In addition, only one member of the FireCluster will be active, even if the health index of both Fireboxes is the same.To learn more about FireCluster health, see About FireCluster Failover
Workaround/Solution
If possible, make sure that the health index for both cluster members is 100. For example, disable any network interfaces that are not connected to a switch.
