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Start Debugging SNMP:
diagnose debug reset
diagnose debug application snmpd -1
diagnose debug console timestamp enable
diagnose debug enable
After enabling the above commands, initiate connectivity from the SNMP manager/server.
Consider an example where the name of the SNMP community is defined as the following, for example: xHdt@hb#$gsj@0.
The error message in SNMP debugging will appear as follows:
Sample error message in debug:
snmpd: </msg> 0
snmpd: checking if community "xHdt@hb#" is valid
snmpd: full name mismatched
snmpd: failed to match community " xHdt@hb#"
Here, the $ sign in the name is not being processed, which results in a mismatch of the name between FortiGate and the SNMP server: in other words, it is trying to match 'xHdt@hb#' instead of 'xHdt@hb#$gsj@0'. To resolve this, remove the $ sign from the name of community then restart the SNMP demon with the following command:
diagnose test application snmpd 99
Related article:
Technical Tip: How to troubleshoot on FortiGate when SNMP Is not delivering interface state informat....
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