Hey guys
I have a weird problem on alerting system.
One of my ethernet interface of a device went down for 10 minutes. I can see the flap in observium eventlog : 
| 2014-04-29 15:18:28 | 
eth port-1-1-1-1 | 
Interface changed: [ifOperStatus] down -> up | 
| 
2014-04-29 15:08:28 | eth port-1-1-1-1 | 
Interface changed: [ifOperStatus] up -> down | 
I have a specific alerting probe on "ifOperStatus equals down" but it has not been triggered : 
 
 | ETH PORT-1-1-1-1 | 
  | 
Checks OK | 14s | 
2h 59m 42s | Never | 
It usually work, but not this time. 
Is there a log or something that could help me understand why it did not ring the bell ?
 Greg