SNMPv3 Informs

In a recent monitoring project we had to set up SNMPv3 informs form the servers in the data center to our monitoring system. Since I found no really convincing documentation in the net I decided to write something here how to receive SNMPv3 in the trapd and how to send informs from the disman part of the net-snmp agent.

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Monitoring Systems, SNMPv3 and the engineID

Sometimes encrypted SNMPv3 requests from Network Monitoring Systems (NMS) to devices just fail out of the blue. There is no reasonable explanation for the behaviour. In this article I will describe the problem, spectulate about the reason, and present a workaround (or solution, if you like). It works for me be I am not sure if I really found the real problem. At least it solves the problem which showes some real weired behaviour of the Zabbix server and the monitored device. But the problem not only occures in the Zabbix NMS but I also saw it in the CA's Spectrum system.

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