This is going to sound very much like something I posted before, but it is not exactly the same ...
I have a problem with SNMPv2 traffic sensors on interfaces of a VMware server. I create the sensors manualy. When I get the list of interfaces, they are all there and I select the ones I am interested in. But as soon as PRTG starts polling them, it fails, giving "No Such Name (SNMP error #2)".
If I create the sensors with SNMPv1, I do not get the problem. So I suspected that the server was doing SNMPv1 but not SNMPv2c. But, when I try an SNMPv2c walk using MIBtools on my CA Spectrum, I can see all the version 2 interface MIB. The server guys insist they are running SNMPv2c OK, and that there is no IP access-list that would explian the difference in behaviour.
Any suggestions? Thanks.