I just this morning discovered SNMP Contexts. When adding a node I'd always seen them there but never paid much attention to them as we've never utilised them. But in investigating why our PRTG setup could monitor the [virtual] device and find its associated interfaces I found that whomever did the PRTG side had subtly amended the SNMP Creds section and the only difference was the use of the SNMP context.
So off I trot to our SolarWinds instance and was able to add and monitor the relevant interfaces of a virtual context on one of our VSXs by adding the context ID to the SNMP Context box - in our case: vsid1.
However, the caveat was that we had to use a different polling engine as it is the same IP as the parent box.
So my questions are:
1. Is there a limit to the number of contexts one can add being equal to the same number of APE's available? IOW, if I have a VSX with 2 contexts I'd need 3 different APEs to monitor them or can the secondary APE also monitor other vsids with a different name / number?
2. If we are restricted to "Number of APE's = Number of Contexts" then is there any other way to monitor multiple instances that use the same IP?