https://community.extremenetworks.com/t5/extremecloud-iq-site-engine/snmp-contact-lost-no-snmp-reply-from-device-x-x-x-x-caused-by/m-p/118953#M12737 <P>No Such Object implies SE is polling a device for a specific OID and the device is returning NSO. If this is resulting in Contact Lost events I can only fathom that this is SNMPv3 and the switch SNMP settings are blocking visibility to standard sysUptime/sysName/sysLocation OIDs which are our means to 'health check' or 'SNMP Ping' a device.</P><P>Taking a tcpdump trace and capturing / decoding the interaction will expose more of what is going on here better than enabling any debugging and having to sift through all the logging it may produce.</P> Wed, 11 Jun 2025 13:07:29 GMT Robert_Haynes 2025-06-11T13:07:29Z https://community.extremenetworks.com/t5/extremecloud-iq-site-engine/snmp-contact-lost-no-snmp-reply-from-device-x-x-x-x-caused-by/m-p/118946#M12736 <P>&nbsp;</P><P>What's happen?</P><P>Where i can find log list?</P><P>&nbsp;</P> Wed, 11 Jun 2025 10:27:57 GMT https://community.extremenetworks.com/t5/extremecloud-iq-site-engine/snmp-contact-lost-no-snmp-reply-from-device-x-x-x-x-caused-by/m-p/118946#M12736 marconet_22 2025-06-11T10:27:57Z https://community.extremenetworks.com/t5/extremecloud-iq-site-engine/snmp-contact-lost-no-snmp-reply-from-device-x-x-x-x-caused-by/m-p/118953#M12737 <P>No Such Object implies SE is polling a device for a specific OID and the device is returning NSO. If this is resulting in Contact Lost events I can only fathom that this is SNMPv3 and the switch SNMP settings are blocking visibility to standard sysUptime/sysName/sysLocation OIDs which are our means to 'health check' or 'SNMP Ping' a device.</P><P>Taking a tcpdump trace and capturing / decoding the interaction will expose more of what is going on here better than enabling any debugging and having to sift through all the logging it may produce.</P> Wed, 11 Jun 2025 13:07:29 GMT https://community.extremenetworks.com/t5/extremecloud-iq-site-engine/snmp-contact-lost-no-snmp-reply-from-device-x-x-x-x-caused-by/m-p/118953#M12737 Robert_Haynes 2025-06-11T13:07:29Z