Again Nagios False Alerts

[ivp2015]

Hi Team,
Again we are getting the same alerts, We have hosted 30+ AWS Windows and Linux machine, Today morning (01:17 AM) we got the Host Down alerts for only 25 Servers.
We check Network connectivity and everything working fine. If there any issue with the network then it should be sent down alerts for all 30+ machines, But we received only 25 servers.

Also, we got down alerts only again after 10min only for 10 servers out of 25 Servers.

Thanks

[scottwilkerson]

f there any issue with the network then it should be sent down alerts for all 30+ machines, But we received only 25 servers.

Nagios only polls the hosts at their check_interval and would not poll them all at the exact same time.

Do these hosts have a max_check_attempts set that is higher that 1 allowing for retries to occur before sending out notifications?