checkhostalive vs ping service

[L B]

Hello all,

What is the difference between checking a host is alive with a check
in the host template (check_command check-host-alive), and creating a
ping service applied to the host ?
I did a test with both configurations, and didn't see a different behavior.

I thought it was a question of dependencies: if a service fails, a
host check is done to check if the host is up. But if one of the
services (ping or another) fails, a host check is done anyway even if
my host checks are disabled (check_interval 0), (that's a correct
behavior for me)

 My configuration doesn't have host checks because it was imported
from Nagios 2.x, and disabling host checks was an optimization setting
I've read somewhere (I also read that it's not necessary anymore with
nagios 3) . Now I'm running Nagios 3, so I'm wondering if it would
make sense to disable the ping service checks and do it as a host
check. Why should I do /don't do this ?

Thanks!
-- 
L.B.

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