Hi

I have nagios all setup and it works fine. It displays the status of all servers i have added. However, nagios should be able to check routers as well, but when i add a router i always see the router in a "PENDING" status. I have checked multiple times that the IP-address to the router is correct in the nagios config and i have a simple "check-host-alive" plugin to just check that the router is up and running:

This is the definition of the router in the hosts.cfg file:
I have checked that the machine nagios is running on that it can ping the router, so that not the problem either. Does someone know why nagios is not checking/detecting the router?

The nagios default plugins actually use the NRPE/nsclient ports to check when they "ping" they aren't actually "pinging" the way the ping does. You should just set your Nagios check_commands.cfg to use the real "ping" command rather than the plugin. This way it is doing a true icmp ping.