Hi,
I have setup Nagios to check this host with the following info:

Max. check attempts: 2 min
Retry interval: 1 min
Check interval: 1 min

However, here is in the log file:
Host OK [11-24-2009 18:09:09] HOST ALERT: Virt;UP;HARD;1;WARNING - 69.31.170.45: rta 103.569ms, lost 0%
Host Down[11-24-2009 18:08:49] HOST ALERT: Virt;DOWN;HARD;2;CRITICAL - 69.31.170.45: rta nan, lost 100%
Host Down[11-24-2009 18:08:29] HOST ALERT: Virt;DOWN;SOFT;1;CRITICAL - 69.31.170.45: rta nan, lost 100%

As you can see the time interval on it is less then 1 minute.

Just in case, here is the cfg file:
define host {
host_name Virt
alias Virt
address IP
parents bby-ara101
hostgroups linux-servers
check_command check_icmp!100.0,20%!200.0,50%
max_check_attempts 2
check_interval 1
retry_interval 1
check_period 24x7
contacts nagiosadmin
notification_interval 0
notification_period 24x7
first_notification_delay 0
notification_options d,u,r
notifications_enabled 1
register 1
}

Any idea?

thanks.
Jean

In nagios.cfg, I have changed auto_rescheduling_interval from 30 (default) to 60 and it seemed to work properly now. But it really doesn't make any sense since auto_reschedule_checks=0 which means it is turned off.

Anyway, I will keep an eye on it to see if it really fix the problem.

Jean