SNMP monitoring for FXM:
FxM can send SNMP traps as an action on an alert. So those could be configured to be sent when an alarm on a system health metric happens. For more information, please refer to Issuing SNMP Traps section here.
SNMP monitoring for FxV:
Enhancement request FXV-520 raised for consideration in a future release of FxV.
SNMP monitoring for APM (archiver and sniffer):
There is currently nothing like the above (FxM) with regards to APM-specific SNMP monitoring. Foglight does offer similar monitoring functionality with regards to SNMP and could be used with APM health metrics for APM Sniffers and Archivers (which are just like any other Foglight metric). For example, it is possible to use the Integrations cartridge for this to send such alarms as SNMP Traps to an external management console. For more information please refer to KB 92349