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Cumulus Networks recommends that you configure SNMPv3 usernames and passwords with NCLU. However, if you prefer to edit the /etc/snmp/snmpd.conf manually instead, be aware that snmpd caches SNMPv3 usernames and passwords in the /var/lib/snmp/snmpd.conf file. Make sure you stop snmpd and remove the old entries when making changes. Otherwise, Cumulus Linux uses the old usernames and passwords in the /var/lib/snmp/snmpd.conf file instead of the ones in the /etc/snmp/snmpd.conf file.


The NCLU command structures for configuring SNMP user passwords are: