From Cisco devices
Access to Cisco device console and run the command beneath this article in Configure terminal mode
snmp-server community public RO
snmp-server community private RW
snmp-server community Community RW
snmp-server enable traps snmp authentication linkdown linkup coldstart warmstart
snmp-server host {Zabbix Server's IP} version 2c public snmp
snmp ifmib ifindex persist