Prometheus suddenly stopped reading some snmp exporter data

[Raymond Clark]

We have been running with snmp exporter monitoring a couple mikrotik routers for over a year then today prometheus is no longer reading all the data. It reads info about cpu, disk and ram but no interface information.

I have checked and snmp exporter is making the information available and attached a file from the screen.

if I paste ifHCInOctets{ifAlias="",ifDescr="ether7 - WAN2 - Capcon",ifIndex="8",ifName="ether7 - WAN2 - Capcon"} into prometheus and execute I get nothing back. 

If I ask for sysUpTime I get back the correct info.

 

Can anyone guide me on getting this working again?