SNMP Simulator

1.2.2 verified Mon Apr 27 auth: no python

snmpsim is a tool that simulates SNMP agents, acting as a multitude of devices from an SNMP manager's perspective. Version 1.2.2 supports Python 3.10-3.11 (requires python: <4.0,>=3.10). It is under active maintenance with occasional releases.

pip install snmpsim

Common errors

error No module named 'pysnmp' ↓

cause pysnmp is a required dependency but not automatically installed.

fix

Run pip install pysnmp separately or use pip install snmpsim[pysnmp] if available.

error ImportError: cannot import name 'SmiManager' from 'pysnmp' ↓

cause Common mistake: importing from pysnmp instead of snmpsim.

fix

Use from snmpsim import SmiManager.

Warnings

breaking snmpsim 1.0+ removed support for Python 2 and older Python 3 versions. Requires Python 3.10+. ↓

fix Upgrade Python to 3.10+ and use snmpsim >=1.0.0.

deprecated The `snmpsimd` command-line script has been deprecated. Use `snmpsim-command-responder` instead. ↓

fix Replace `snmpsimd` with `snmpsim-command-responder` in scripts and documentation.

gotcha Data directory must follow a specific structure (e.g., subdirectories for each simulated agent) or the simulator may silently fail. ↓

fix Ensure each agent has its own folder with files like 'snmp_v1.snmprec', 'snmp_v2c.snmprec', etc.

Imports

SmiManager
wrong
```
from pysnmp import SmiManager
```
correct
```
from snmpsim import SmiManager
```
SmiManager is specific to snmpsim, not pysnmp.

VariationTable

wrong

from snmpsim.variation import VariationTable

correct

from snmpsim import VariationTable

VariationTable is exported at package level.

Quickstart

Starts the SNMP simulator with a local agent endpoint and data directory.

from snmpsim.commands import main
import sys

if __name__ == '__main__':
    sys.argv = ['', '--agent-udpv4-endpoint=127.0.0.1:161', '--data-dir=./data']
    main()