We need to monitor BFD flaps on our Cisco Nexus devices but the problem is that Zabbix do SNMP polling every 1 minute, and we can't detect, for example, 5 sec BFD flaps. We detect only if BFD down for a minute. Maybe BFD have some up/down counter or other mechanism which help us to monitor flaps? Have you some other ideas to sovle this issue maybe?
A trap should be the right approach to 'instantly' notify Zabbix of the problem. Polling is fine for statistics and overall monitoring but problems should be 'trapped'.
You'll need to set up Zabbix's trap receiver and something along
snmp-server enable traps bfd session-up/down on the Nexus.