Host vs Service reachability

Jason Frisvold frisvolj at lafayette.edu
Mon May 18 19:25:44 CEST 2009


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Jon Angliss wrote:
> You're actually "inviting a world of hurt" doing it the other way
> around (service ping over host check).  Host checks will help surpress
> service notifications, as well as help manage network reachability if
> you use parents (see [1]).  Take for example, a host you have FTP,
> HTTP, and your ping check on.  If you the host goes down, the ping
> service will show down, but FTP, and HTTP tests will also show
> unreachable, or timeout, causing 3 notifications.  If the host check
> was to be used, you'd get a notification the host was down, rather
> than 3 to report host issues.  You can, of course, work around this
> with service dependencies, but that complicates your configuration.

Excellent.  This is pretty much what I gathered from various sources,
but I just wanted to make sure.  Thanks!

- --
- ---------------------------
Jason Frisvold
Network Engineer
frisvolj at lafayette.edu
- ---------------------------
"What I cannot create, I do not understand"
   - Richard Feynman
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