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Tech Tips - How to simulate customer SNMP devices in your lab 

Apr 03, 2017 05:27 AM

This document assumes the below.

  •      You are familiar with sapwalk2 utility.
  •       You have walk output of customer SNMP devices.

 

Here are steps to simulate customer SNMP devices in your lab.

 

  1. Download and install the simulator on your Windows machine.

https://sourceforge.net/projects/snmpsim/files/snmpsim/0.2.4/

snmpsim-0.2.4-setup-win32.exe

 

NOTE: If Microsoft Visual C++ 2008 Redistributable (x86) is not installed, please install it separately.

 

  1. Create a data directory where you place the walk file. For example c:\snmpdata.

 

  1. Please ensure that you walk file meets the below criteria:

 

- Was created through the sapwalk2 utility.

- All commented lines are removed from the output.

- File extension is . sapwalk

 

  1. Place the walk file to data directory.

 

  1. From a command line run:

 

C:\Program Files (x86)\SNMP Simulator>snmpsimd --agent-udpv4-endpoint=192.168.35.111:161 --data-dir=c:\snmpdata --v2c-arch

 

Where 192.168.35.111 is the IP address of the Windows machine.

The name of the file will be community name.

 

NOTE: Windows SNMP Service needs to be shutdown

NOTE: The community string will be the name of the file.

For example, I have test01.sapwalk in the data directory, so test01 is community name.

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Comments

Yu Ishitani
Apr 04, 2017 10:00 PM

Thanks Phani for the followup.

Issac08 - This is a software that allows you to simulate SNMP device in your lab. This is not packet capturing tool like Wireshark.

 

Regards,

Yu Ishitani

Phani Devulapalli
Apr 04, 2017 07:22 PM

Its just a network device simulator. When you run the sapwalk against the device it captures it current state and dumps it in to a  . sapwalk file (kind of a snapshot of a network device). 

 

You can use the SNMP Simulator along with the . sapwalk file to simulate the device to understand the network device characteristics or discover and test it using a monitoring tool 

 

May be if you have the simulator run on a windows machine in the network where you want to monitor the network drop , you should be getting an alert the same way you get it for any other device when its unavailable . It also depends on what exactly you are trying to achieve when you say "network drop"

 

Issac08
Apr 04, 2017 11:33 AM

By using this whether we can find the network drop from device to Monitoring server ?

Phani Devulapalli
Apr 03, 2017 08:26 PM

Thanks for sharing Yu_Ishitani , this is helpful 

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