Issue with devices availability in cacti

[gmgiadinh176]

I's been few months that I set up my network monitoring with cacti. I've noticed since the migration of my devices that so many devices are not reachable (down) while actually they are UP, I know that it's not coming from the device itself because I can verify that from other monitoring Tool. I am using Ping and SNMP Method to poll the devices. and I notice that the availability is about 50% to 5 % for some devices. When I click on the device it doesn't show any SNMP or Ping error but they still dhow down from the management interface and I get an alert from monitor. I don't know if there is an a problem with the polling

[TheWitness]

Just use snmp ping. Using both is first increasing polling time. I never liked that setting, but someone requested it. So, it's there, but I never use it.