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SNMP Simulator introduction
Producing SNMP snapshots
Simulating SNMP Agents
Transport-based variation
Sharing snapshots
MIB-based simiulation
Simulation based on captured traffic
Simulation with variation modules
Recording with variation modules
Managing data files
Large scale simulation
Tips and tricks
Download & Install
License
Changelog
Browse source
Adding features
Sponsorship
Simulation Service
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French version

SNMP Agent Simulator

The SNMP Simulator software is intended for testing SNMP Managers against a large number of SNMP Agents that represent a potentially very large network populated with different kinds of SNMP-capable devices.

Typical use case for this software starts with recording a snapshot of SNMP objects of donor Agents into text files using "snmprec.py" tool shipped with Simulator distribution. Or if you'd better query your donor SNMP Agent with Net-SNMP's snmpwalk tool, that information could also be used as a source of information by the Simulator. Another option is to generate snapshots directly from MIB files with "mib2dev.py" tool. The latter appears useful whenever you do not posess a physical donor device. Once you have your snapshots at hand, Simulator script "snmpsimd.py" could be run over the snapshots responding to SNMP queries in the same way as donor SNMP Agents did at the time of recording.

Technically, SNMP Simulator is a multi-context SNMP Agent. That means that it handles multiple sets of Managed Object all at once. Each device is simulated within a dedicated SNMP context.

SNMPv3 Manager talking to Simulator has to specify SNMP context name in queries, while SNMPv1/v2c Manager can use specific SNMP community name (logically bound to SNMP context) to access particular set of Managed Objects.

It is also possible with the SNMP Simulator software to vary responses based on Manager's transport address, not only SNMPv3 context or SNMPv1/v2c community names.

Even more powerful is the latest Simulator's ability to gateway SNMP queries to its extension (also called variation modules). Once a variation module is invoked by Simulator core, it is expected to return a well-formed variable-binding sequence to be put into Simulator's response message.

Simulator is shipped with a collecton of factory-built variation modules including those suitable for external process invocation, SNMP TRAP/INFORM originator and SQL database adapter. Users of the Simulator software are welcome to develop their own variation modules if stock ones appears insufficient.

We host an instance of SNMP Simulator at demo.snmplabs.com for everyone to play with it online.

The Simulator software is fully free and open source. It's written from ground-up in an easy to learn and high-level scripting language called Python. Everyone is welcome to modify Simulator in any way to best suite their needs (note a [very permissive] BSD License is protecting Simulator). If you'd rather would like us customizing or developing particular Simulator feature for you, please let us know the details.

If something in Simulator does not work as expected, please try browsing snmpsim mailing list archives or post your question there.


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