Host checks and parents (Down/Unreachable)

[Petr Simek]

On Wed, 21 Jul 2004, Steve Loughran wrote:

> Nagios Host
>
> router #1 (direct connection to Nagios host subnet)
>
> router #2 (next hop, has router #1 as parent)
>
> If the routing gets changed so traffic to router #2 does not pass through
> router #1, and router #1 is taken offline (and shown as "DOWN"), will Nagios
> show router #2 down due to the parent being offline? Will it do a host check

No, it will be shown as UP.

> anyway, or will it try to save time and not bother, assuming that is router
> #1 is offline then router #2 must be unreachable?

No, nagios monitor actual state of host . Only difference is that if
parent is UP then host is reported as DOWN or if parent is DOWN then host
is reported as UNREACHABLE.

> Steve

*------------------------------------------------------------------------*
|                          Petr Simek   APS JU                           |
|                             psimek at jcu.cz                              |
*------------------------------------------------------------------------*



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