I'm using PRTG to monitor my UTM box with SNMP, I have imported the MIB and lots of sensors are generated and all seem to work fine. However, when I restart UTM or if my DSL connection goes down/up, the ID for tun0 and ppp0 get changed and so PRTG starts throwing alerts.
For example, the other my DSL went down for about five minutes and when it came back PRTG showed
I looked on UTM in Advanced and my interfaces showed:
So ppp0 had gone from 8 to 18 and tun0 from 11 (ignore the 12 from earlier as it's just a label I forgot to update from last time this happened) to 19
I therefore reboot UTM and this time interfaces showed:
Both had reverted and so PRTG was fine:
I'm on 9.312-8 but before on 9.310 this happened every time UTM was rebooted, though it seems that's been fixed in 9.312 and reboots don't appear to change them.
Any ideas how I can prevent the IDs from changing or is it a bug?
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