check-host-alive check

[mariog at absi.be]

Hello all
can anyone help me with this;
there a few hosts mostly adsl or sdsl routers dat have critical state with 
plugin timed out. 

the critical error is : 
check-host-alive critical plugin timed out after 10 seconds. 

i cannot find in nagios plugins directory any check named 
check-host-alive, it seems to be an embedded nagios check when the host is 
defined? despite this the host is up. 

can someone help me how does it work and where is this check-host-alive 
check stored in a regular nagios install under solaris 10. 

thank you very much for your help

Mario Garcia Ortiz/ABSI
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