Device status changed to Up from snmp check

Help
1

Hello.
Have problem with one of my core switches. Sometimes device status changed DOWN from snmp check, and as a result, I got gap in my graph:

Screenshot%20from%202018-09-17%2009-08-01
Screenshot%20from%202018-09-17%2009-08-01875×371 23.4 KB

It`s not a switch problem. Maybe network/access…
But, how can I manage or tune this problem?

2

check this doc https://docs.librenms.org/#Support/FAQ/#why-do-i-see-gaps-in-my-graphs