I’m using SNMP binding to monitor Synology disk usage without any issues. Can tell you the used OID tomorrow when I have access to my system. Which version of SNMP (v1-v3) have you enabled on your Syno?
Ok, just checked my installation.
I’m using different OID’s to monitor disk usage of my DS916+
E.g. Volume 1 Used = .1.3.6.1.2.1.25.2.3.1.6.51
This is of type Integer and works without any issues. The last 2 digits (51) can be different, depending on your file system. And you need to multiply the result of this OID by the value of the corresponding StorageAllocationUnit (can also be received via SNMP).
Also for the Uptime I use different OID which is not COUNTER64 .1.3.6.1.2.1.25.1.1.0
Your configuration looks good. So maybe there is really an issue with COUNTER64 OID’s and the binding. I don’t use any so can’t give more feedback on this.
I encountered the same issue trying to read a COUNTER64 from my Mikrotik. Apparantly there is an undocumented extra version parameter you can add, which allows you to read COUNTER64. Just add ‘v2c’ as protocol-version: [url:protocol-version:community:OID:refresh]