All possible conditions when the monitor probe will be skipped on ADC:
 

1. Live Traffic: TCP monitor will skip probes when there is live traffic to a service. Please note, this is not applicable to http, http-ecv, tcp-ecv monitors. This is only applicable for type tcp monitor and tcp-default monitors. LRTM will override this behaviour so if LRTM is set on your tcp monitor, it’ll not skip the monitor probe when there is traffic and send as expected. HTTP-Inline monitor’s implementation is different. If live traffic is being served by the service, probes will be skipped.
2. Max Client set: If max client is set on your service, and if it is reached, probes will be skipped till current client connection gets over.
3. Monitor is disabled.
4. Monitor binding is disabled.
5. Health monitoring is turned off for that service.
6. Service is disabled, therefore in Out of Service state
7. Probes will be skipped on the secondary node if the environment is HA.
8. In case of GSLB, if trigger monitor is set to MEPDOWN and if the MEP is UP, the monitor will skip probes. If trigger monitor is set to MEPDOWN_SVCDOWN and MEP is UP or service is UP, monitor will skip probes.