Nagios cannot see a host when it's come up after be down

[Jorge Luis de la Garza (Sistemas)]

Hi !!

I'm running nagios 1.1 on Linux debian 3.0 (Pentium4) with nagios-plugins 1.3.1

I'm monitor several ruters (cisco) with check_ping and check_ifstatus,
when someone goes down nagios detect perfectly, but when it comes 
up nagios cannot detected. Even with a ping from the pc can't see the router.

The only way to correct this is to restart the interfaces of linux.

This happen some times, not always.

I also run cacti on the linux machine to graph the interfaces.

It's seems like if nagios (or some other program) is blocking the ip of the router, 
but i don't now how to correct this problems

any ideas ?

thanks !!





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