How to still check Service when the Host is down....?

[mohnewald]

Hello,

we would like to monitor a router, which has 3 Interfaces.
Interface 1: The "main" interface on the customer side. Its the host address
Interface 2: 1st WAN Uplink
Interface 3: 2nd WAN Uplink

I wrote a own plugin, which checks the WAN Uplinks as a service with escalation and stuff. (e.g. if one uplink is down, its a warnung, if both are down, its critical).

However, if the Customer unplugs the "main" interface, its IP (and the host address) is down and my service is stuck in hard state 1/3.

How can i still "run" the service check is the assigned host is down?

I already tried to depend the service to some other dummy host with:

Code: Select all

define servicedependency{
       dependent_hostgroup_name        DualPing
       service_description             DualPing
       dependent_host_name             dummyhost
       dependent_service_description   DualPing
        }

But that did not do the trick :/

Any other hints?

Cheers,
Michael

[kg2857]

Can you ping the WANs? If so maybe you can test ping to the main I/F (#1), then #2 and check via #2, and finally #3 if #2 is also down.

[RobMcL]

Switch Loopback addresses were designed for this purpose. They are always up regardless of interface statuses and you should be utilizing these on your network for monitoring instead of using VLAN IPs.