I believe that 'Alert when a switch port is connected / disconnected' is part of the Meraki cloud controller poprietary MIB.    See Traps in here:  https://documentation.meraki.com/zGeneral_Administration/Monitoring_and_Reporting/SNMP_Overview_and_Configuration#SNMP_Traps   The MIB itself is available within Dashboard:  Organization > Configure > Settings, under SNMP   Does your alert have to be via SNMP?   Can you not use Network-wide > Configure > Alerts?    Under switch, when a port type goes down for selected period - this generates alert emails - or alerts via Webhooks, if you can use that. ... View more