Symptom
Health monitoring alert with the message "Interface is not receiving any packets" is shown on the FMC for some subinterfaces on a port-channel.
The subinterfaces that shown this error have 0 in the show traffic counters
This is expected behavior because the same interfaces have 0 on the show traffic counters; received and transmitted
Conditions
FTD firewall running subinterfaces
-show traffic is at 0 for received and transmitted packet for that subinterface in question.
-The interfaces that have increased counters on show traffic output don't have this error
