inexio/snmpsim - Githubissues

SNMP Simulator

This is a pure-Python, open source and free implementation of SNMP agents simulator distributed under 2-clause BSD license.

Why this fork?

Original project by Ilya Etingof seems not to be continued anymore. Because of that, we try to maintain / enhance SNMP simulator.

Features

SNMPv1/v2c/v3 support
SNMPv3 USM supports MD5/SHA/SHA224/SHA256/SHA384/SHA512 auth and DES/3DES/AES128/AES192/AES256 privacy crypto algorithms
Runs over IPv4 and/or IPv6 transports
Simulates many EngineID's, each with its own set of simulated objects
Varies response based on SNMP Community, Context, source/destination addresses and ports
Can gather and store snapshots of SNMP Agents for later simulation
Can run simulation based on MIB files, snmpwalk and sapwalk output
Can gather simulation data from network traffic or tcpdump snoops
Can gather simulation data from external program invocation or a SQL database
Can trigger SNMP TRAP/INFORMs on SET operations
Capable to simultaneously simulate tens of thousands of Agents
Offers REST API based control plane
Gathers and reports extensive activity metrics
Pure-Python, easy to deploy and highly portable
Can be extended by loadable Python snippets

Related projects

If you are looking for simulating the command line interface (CLI) of a network device, please look at our NESi project.

Thola is the opposite of NESi and SNMP simulator. Thola is an unified interface for communication with network devices (manufacturer and model should be abstracted). Thola is using NESi for its automatic integration tests.

Download

SNMP simulator software is freely available for download from PyPI and project site.

Installation

Just run:

$ pip install https://github.com/inexio/snmpsim/archive/master.zip

How to use SNMP simulator

You can use snmpsim in different ways:

for smaller environments, it is sufficient to use the snmpsim-command-responder
in larger environments (for example lab environments) the so-called snmpsim-control-plane is often used: This is a management service that has a REST-API and manages the snmpsim-command-responder instances. If you want to know how to set up this, please have a look in our documentation on the snmpsim-control-plane repo.

There are also two clients based on the REST API of the snmpsim-control-plane.

Once installed, invoke snmpsim-command-responder and point it to a directory with simulation data:

$ snmpsim-command-responder --data-dir=./data --agent-udpv4-endpoint=127.0.0.1:1024

Simulation data is stored in simple plaint-text files having OID|TYPE|VALUE format:

$ cat ./data/public.snmprec
1.3.6.1.2.1.1.1.0|4|Linux 2.6.25.5-smp SMP Tue Jun 19 14:58:11 CDT 2007 i686
1.3.6.1.2.1.1.2.0|6|1.3.6.1.4.1.8072.3.2.10
1.3.6.1.2.1.1.3.0|67|233425120
1.3.6.1.2.1.2.2.1.6.2|4x|00127962f940
1.3.6.1.2.1.4.22.1.3.2.192.21.54.7|64x|c3dafe61
...

Simulator maps query parameters like SNMP community names, SNMPv3 contexts or IP addresses into data files.

You can immediately generate simulation data file by querying existing SNMP agent:

$ snmpsim-record-commands --agent-udpv4-endpoint=demo.snmplabs.com \
    --output-file=./data/public.snmprec
SNMP version 2c, Community name: public
Querying UDP/IPv4 agent at 195.218.195.228:161
Agent response timeout: 3.00 secs, retries: 3
Sending initial GETNEXT request for 1.3.6 (stop at <end-of-mib>)....
OIDs dumped: 182, elapsed: 11.97 sec, rate: 7.00 OIDs/sec, errors: 0

Alternatively, you could build simulation data from a MIB file:

$ snmpsim-record-mibs --output-file=./data/public.snmprec \
    --mib-module=IF-MIB
# MIB module: IF-MIB, from the beginning till the end
# Starting table IF-MIB::ifTable (1.3.6.1.2.1.2.2)
# Synthesizing row #1 of table 1.3.6.1.2.1.2.2.1
...
# Finished table 1.3.6.1.2.1.2.2.1 (10 rows)
# End of IF-MIB, 177 OID(s) dumped

Or even sniff on the wire, recover SNMP traffic there and build simulation data from it.

Besides static files, SNMP simulator can be configured to call its plugin modules for simulation data. We ship plugins to interface SQL and noSQL databases, file-based key-value stores and other sources of information.

Besides stand-alone deployment described above, third-party SNMP Simulator control plane project offers REST API managed mass deployment of multiple snmpsim-command-responder instances.

Documentation

Detailed information on SNMP simulator usage could be found at snmpsim site.

Getting help

If something does not work as expected, open an issue at GitHub or post your question on Stack Overflow.

Feedback and collaboration

I'm interested in bug reports, fixes, suggestions and improvements. Your pull requests are very welcome!

If you want to contact us, please mail to the Thola Team

inexio / snmpsim

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