How SNMP port works - What is an SNMP port number?
Setting SNMP parameters and trap receivers
Collecting SNMP Traps Messages
What does the "Link Up" or "Link Down" SNMP Trap monitor? How do I initiate it? | Industrial Ethernet Products: Gigabit Switches, Media Converters, Ethernet Extenders
What is SNMP? | SNMP Ports - Protocols & Versions - Site24x7