SNMP - Wrong device uptime using PRTG

Question

Hej, 
 i am using PRTG and i have an problem with the SNMP-Uptime-Sensor. The uptime of the XG is 16 day(s), 19 hour(s), 21 minute(s). The SNMP-Sensor says 2 day(s), 20 hour(s), 52 minute(s). 
 The SNMP-Tester says following: 
 : DISMAN-EVENT-MIB::sysUpTimeInstance = 24762450 ( 2 days 20 hours 47 minutes ) 
 
 With Sophos UTM, this sensor working very well. So where is the problem? PRTG or Sophos XG? 
 Thanks.

FloSupport · Answer

Hey Steppenwolf 
 Sorry for the inconvenience, but there is currently no SNMP OID to monitor the system uptime of the XG. The SNMP OID you may have been using (generic sysUpTime) is possibly related to the Garner service uptime. This service can and will be restarted during normal operation, and therefore unable to provide an accurate device system uptime. Our developers are aware and this has been brought up for consideration in a future release. 
 Please see my previous community post here . 
 Regards,