Nagios Support Forum

Hi Team,

We have some routers, which were unreachable from last month to till yesterday. In performance graph also showing same, but in report we are getting 100 percent up. please check and share the reason also solution.

Those reports use entirely different data sources. Is it possible that the hostname, IP, or device was pingable during this time? Generally check_ping is used for the uptime status. Alternatively, what host check are you presently using on those devices?

Hi,

Router was up and WAN IP was ping able, but we are using LAN IP for monitor the device and same time LAN Routing was disable, cause of we were not able to Ping Lan ip from Nagios box. For host check command is blank only and for ping we are using check ping only.

If you do not have a host check defined it will always display the initial state set in the configuration file. My guess if you looked, is that it would be set to UP. This is almost definitely why despite that the device could not be contacted it is showing up. Easiest way to resolve this would be to define the check_ping command for the host check and allow it to properly check the device name.

Then ping service should show down, cause we have defined command, but it is also 100 percent up. how?

A service will never effect the host status. that is what host check are for. This is to not cause a conflict when the host is up and a service is actually down. Simply specifying a ping service check will not suffice to show a host down despite being a similar metric.