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Troubleshooting unknown snmp version 193 Error in snmptrapd

Learn how to resolve the `unknown snmp version 193` error in snmptrapd and ensure that your SNMP traps are successfully captured. --- This video is based on the question https://stackoverflow.com/q/70364146/ asked by the user 'hiauk' ( https://stackoverflow.com/u/4567846/ ) and on the answer https://stackoverflow.com/a/70365590/ provided by the user 'hiauk' ( https://stackoverflow.com/u/4567846/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions. Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: snmptrapd unknown snmp version 193 Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l... The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license. If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com. --- Troubleshooting the unknown snmp version 193 Error in snmptrapd If you’ve recently begun working with snmptrapd to capture SNMP traps, you may have run into an issue where your logs display an error message: "unknown snmp version 193". This can be especially frustrating if you’re not receiving any SNMP trap data, leaving you wondering if you’ve missed something crucial in your setup. In this guide, we’ll walk through the potential causes of this issue, providing you with a clear understanding of what might be going wrong and how to fix it. Understanding the Problem You’ve configured snmptrapd and started the service, but your logs indicate an unknown SNMP version. This error often arises when SNMP traps are being sent in an unexpected format or when there are misconfigurations in your snmptrapd setup. To help resolve this, let’s look at common troubleshooting steps. Step-by-Step Solution to Fix the SNMP Version Error Here’s how to effectively address the unknown snmp version 193 error and ensure that your SNMP traps are being logged correctly: 1. Update Your snmptrapd Configuration One likely reason you aren’t seeing the expected output could be because snmptrapd doesn’t have a designated output file specified in the configuration. To address this, you should modify your /etc/snmp/snmptrapd.conf file. Here’s how: Open the file in your favorite text editor. You can use: [[See Video to Reveal this Text or Code Snippet]] Ensure your configuration file includes the logging option for output. For example, update it to look something like this: [[See Video to Reveal this Text or Code Snippet]] 2. Check Service Status After modifying the configuration file, restart the snmptrapd service to apply the changes: [[See Video to Reveal this Text or Code Snippet]] You can also check the status of the service to verify that it’s running correctly: [[See Video to Reveal this Text or Code Snippet]] 3. Verify Trap Sending Configuration Ensure that the devices or applications sending SNMP traps are properly configured. Check the SNMP version being used (e.g., SNMPv1, SNMPv2c, etc.) as this might cause version mismatch issues. 4. Monitor the Logs After restarting the service and ensuring correct configuration, monitor the log file for outputs: [[See Video to Reveal this Text or Code Snippet]] Check if the trap messages are now being logged as expected. Conclusion The unknown snmp version 193 error can be a hindrance to effectively capturing SNMP traps, but with these troubleshooting steps, you can identify and rectify the underlying issues. Ensuring proper configuration and providing a specified output file are key steps to get snmptrapd running smoothly. If you continue to face issues after following these steps, it may be beneficial to check your network configurations or revisit your SNMP trap sources for possible discrepancies. By paying attention to these details, you should be back on track to successfully capturing and logging SNMP traps.