[Observium] Juniper EX4550 - Snmp issue

Hello,

Since 2 or 3 months I have some issue with some of our EX4550.

For some reason,, some of the switches are just polling from time to time ( first 2 screencap ) and others are just not polling ( 3 - 4 -5 ) the funny thing is : I don’t have this issue on cacti ( the switches are also polled from Cacti )

I have 3 Junos version running on the backbone and only 3 out of 20 ex4450 have this issue ( and they don’t have the same junos version ). The filter on the loopback interfaces are exactly the same. I can have the arp table, the lldp and bgp/ospf neig but not the if graphing …

I already restarted snmp and tried many other thing on the juniper itself.

Thanks, Raphael