OpManager don't alarm when the routers are offline (I'am from Brazil)

OpManager don't alarm when the routers are offline (I'am from Brazil)

I'm having a problem in OpManager.
Added terminal equipment, routers and switches. But when I try to ping the routers OpManager complains that the router is still online.
That is when the router goes offline OpManager not tell me.
Can you help me please.
English may not be good because I'm from Brazil and I'm using google translator.
Thanks.
I await answers.





                  New to ADSelfService Plus?